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Time-domain dynamic constitutive model suitable for mucky soil site seismic response Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Qing Dong, Su Chen, Liguo Jin, Zhenghua Zhou, Xiaojun Li
Soil nonlinear behavior displays noticeable effects on the site seismic response. This study proposes a new functional expression of the skeleton curve to replace the hyperbolic skeleton curve. By integrating shear modulus and combining the dynamic skeleton curve and the damping degradation coefficient, the constitutive equation of the logarithmic dynamic skeleton can be obtained, which considers the
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Longitudinal vibration characteristics of a tapered pipe pile considering the vertical support of surrounding soil and construction disturbance Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Zhenya Li, Yunchao Pan, Xianbin He, Chong Lv, Towhid Mohammad
This research is concentrated on the longitudinal vibration of a tapered pipe pile considering the vertical support of the surrounding soil and construction disturbance. First, the the pile–soil system is partitioned into finite segments in the vertical direction and the Voigt model is applied to simulate the vertical support of the surrounding soil acting on the pile segment. The surrounding soil
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A novel mitigation measure for normal fault-induced deformations on pile-raft systems Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Mohammadreza Jahanshahi Nowkandeh, Mehdi Ashtiani
Evidence from recent earthquakes has shown destructive consequences of fault-induced permanent ground movement on structures. Such observations have increased the demand for improvements in the design of structures that are dramatically vulnerable to surface fault ruptures. In this study a novel connection between the raft and the piles is proposed to mitigate the hazards associated with a normal fault
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Finite element model updating for structural damage detection using transmissibility data Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Ahmad Izadi, Akbar Esfandiari
This paper presents a new finite element model updating method for estimating structural parameters and detecting structural damage location and severity based on the structural responses (output-only data). The method uses the sensitivity relation of transmissibility data through a least-squares algorithm and appropriate normalization of the extracted equations. The proposed transmissibility-based
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Study on a conical bearing for acceleration-sensitive equipment Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Hui Pang, Wen Xu, Junwu Dai, Tao Jiang
Seismic isolation effectively reduces seismic demands on building structures by isolating the superstructure from ground vibrations during earthquakes. However, isolation strategies give less attention to acceleration-sensitive systems or equipment. Meanwhile, as the isolation layer’s displacement grows, the stiffness and frequency of traditional rolling and sliding isolation bearings increases, potentially
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Seismic safety assessment with non-Gaussian random processes for train-bridge coupled systems Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Han Zhao, Lei Gao, Biao Wei, Jincheng Tan, Peidong Guo, Lizhong Jiang, Ping Xiang
Extensive high-speed railway (HSR) network resembled the intricate vascular system of the human body, crisscrossing mainlands. Seismic events, known for their unpredictability, pose a significant threat to both trains and bridges, given the HSR’s extended operational duration. Therefore, ensuring the running safety of train-bridge coupled (TBC) system, primarily composed of simply supported beam bridges
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Experimental study on seismic reinforcement of bridge foundation on silty clay landslide with inclined interlayer Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Da Lei, Hanmo Xiao, Jianhua Ran, Bin Luo, Guanlu Jiang, Tianlang Xue
A shaking table test for a bridge foundation reinforced by anti-slide piles on a silty clay landslide model with an inclined interlayer was performed. The deformation characteristics of the bridge foundation piles and anti-slide piles were analyzed in different loading conditions. The dynamic response law of a silty clay landslide with an inclined interlayer was summarized. The spacing between the
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Pulses in ground motions identified through surface partial matching and their impact on seismic rocking consequence Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-24 Yuchuan Tang, Jiankang Wang, Gang Wu
In seismology and earthquake engineering, it is fundamental to identify and characterize the pulse-like features in pulse-type ground motions. To capture the pulses that dominate structural responses, this study establishes congruence and shift relationships between response spectrum surfaces. A similarity search between spectrum surfaces, supplemented with a similarity search in time series, has been
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Numerical analysis of moving train induced vibrations on tunnel, surrounding ground and structure Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-11 Swati Srivastav, Sowmiya Chawla, Swapnil Mishra
This study is focused on the effect of vibration induced by moving trains in tunnels on the surrounding ground and structures. A three-dimensional finite element model is established for a one-track railway tunnel and an adjacent twelve-storey building frame by using commercial software Midas GTS-NX (2019) and Midas Gen. This study considered the moving load effect of a complete train, which varies
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Identification of time-varying system and energy-based optimization of adaptive control in seismically excited structure Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-11 Elham Aghabarari, Fereidoun Amini, Pedram Ghaderi
The combination of structural health monitoring and vibration control is of great importance to provide components of smart structures. While synthetic algorithms have been proposed, adaptive control that is compatible with changing conditions still needs to be used, and time-varying systems are required to be simultaneously estimated with the application of adaptive control. In this research, the
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Direct scaling of residual displacements for bilinear and pinching oscillators Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-04 Mohammad Saifullah, Vinay K. Gupta
The estimation of residual displacements in a structure due to an anticipated earthquake event has increasingly become an important component of performance-based earthquake engineering because controlling these displacements plays an important role in ensuring cost-feasible or cost-effective repairs in a damaged structure after the event. An attempt is made in this study to obtain statistical estimates
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Reliability-based life-cycle cost seismic design optimization of coastal bridge piers with nonuniform corrosion using different materials Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-01
Abstract Reinforcement corrosion is the main cause of performance deterioration of reinforced concrete (RC) structures. Limited research has been performed to investigate the life-cycle cost (LCC) of coastal bridge piers with nonuniform corrosion using different materials. In this study, a reliability-based design optimization (RBDO) procedure is improved for the design of coastal bridge piers using
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Seismic performance evaluation of water supply pipes installed in a full-scale RC frame structure based on a shaking table test Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-01
Abstract As an important part of nonstructural components, the seismic response of indoor water supply pipes deserves much attention. This paper presents shaking table test research on water supply pipes installed in a full-scale reinforced concrete (RC) frame structure. Different material pipes and different methods for penetrating the reinforced concrete floors are combined to evaluate the difference
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Resilient performance of self-centering hybrid rocking walls with curved interface under pseudo-static loading Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-01
Abstract Frame and rocking wall (FRW) structures have excellent resilient performance during earthquakes. However, the concrete at interfacial corners of rocking walls (RWs) is easily crushed due to local extreme compression during the rocking process. An innovative RW with a curved interface is proposed to prevent interfacial corners from producing local damage, enhancing its earthquake resilient
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Seismic response of a mid-story isolated structure considering SSI in mountainous areas under long-period earthquakes Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2024-01-01
Abstract At present, there is not much research on mid-story isolated structures in mountainous areas. In this study, a model of a mid-story isolated structure considering soil-structure interaction (SSI) in mountainous areas is established along with a model that does not consider SSI. Eight long-period earthquake waves and two ordinary earthquake waves are selected as inputs for the dynamic time
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Liquefaction susceptibility and deformation characteristics of saturated coral sandy soils subjected to cyclic loadings – a critical review Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-12-29
Abstract Coral sandy soils widely exist in coral island reefs and seashores in tropical and subtropical regions. Due to the unique marine depositional environment of coral sandy soils, the engineering characteristics and responses of these soils subjected to monotonic and cyclic loadings have been a subject of intense interest among the geotechnical and earthquake engineering communities. This paper
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TopSTO: a 115-line code for topology optimization of structures under stationary stochastic dynamic loading Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-24 Sebastian Pozo, Fernando Gomez, Thomas Golecki, Juan Carrion, Billie F. Spencer
The use of topology optimization in structural design under dynamic excitation is becoming more prevalent in the literature. While many such applications utilize frequency or time domain formulations, relatively few consider stochastic dynamic excitations. This paper presents an efficient and compact code called TopSTO for structural topology optimization considering stationary stochastic dynamic loading
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Resonance analysis of a high-speed railway bridge using a stochastic finite element method Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-24 Ping Xiang, Weiran Yan, Lizhong Jiang, Wangbao Zhou, Biao Wei, Xiang Liu
There is always some randomness in the material properties of a structure due to several circumstances and ignoring it increases the threat of inadequate structural safety reserves. A numerical approach is used in this study to consider the spatial variability of structural parameters. Statistical moments of the train and bridge responses were computed using the point estimation method (PEM), and the
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Dynamic characterization of tailing dam using fully coupled dynamic analysis with different boundary conditions — a case study Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-24 Thanikella Vijayasri
The seismic response analysis of a tailing dam is studied using a fully coupled effective stress approach in conjunction with an advanced multi yield surface plastic constitutive model for tailing material. Strain controlled static and cyclic triaxial tests were carried out to obtain the constitutive model for the tailing material. The tailing materials were collected from the Rampura Agucha tailing
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Prediction of ground-borne vibration induced by impact pile driving: numerical approach and experimental validation Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-24 A. Colaço, P. Alves Costa, C. Ferreira, C. Parente, J. Fernandez-Ruiz
Deep foundations are currently used in engineering practice to solve problems caused by weak geotechnical characteristics of the ground. Impact pile driving is an interesting and viable solution from economic and technical points of view. However, it is necessary to ensure that the environmental drawbacks, namely ground-borne vibration, are adequately met. For this purpose, the authors propose an axisymmetric
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Generalized response displacement methods for seismic analysis of underground structures with complex cross section Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Zigang Xu, Linling Ding, Xiuli Du, Chengshun Xu, Haiyang Zhuang
The response displacement method (RDM) is recommended for the seismic analysis of underground structures in the transverse direction for many codes, including bases for design of structures-seismic actions for designing geotechnical works (ISO 23469) and code for seismic design of urban rail transit structures (GB 50909-2014). However, there are some obvious limitations in the application of RDM. Springs
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Study regarding typical liquefaction damage during the 2021 Maduo Ms7.4 earthquake in China Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Jinyuan Yuan, Yunlong Wang, Jiajun Ma, Beilei Zhan, Xiaoming Yuan, Lanmin Wang, Xiaoyang Wu
The most important method of understanding liquefaction-induced engineering failures comes from the investigation and analysis of earthquake damage. In May 2021, the Maduo Ms7.4 earthquake occurred on the Tibetan Plateau of China. The most representative engineering disaster caused by this earthquake was bridge damage on liquefied sites. In this study, the mutual relationships between the anti-liquefaction
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Performance of RC buildings after Kahramanmaraş Earthquakes: lessons toward performance based design Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Baris Binici, Ahmet Yakut, Koray Kadas, Ozan Demirel, Ugur Akpinar, Afsin Canbolat, Firat Yurtseven, Orkun Oztaskin, Selin Aktas, Erdem Canbay
Two simultaneous earthquakes occurred in the Kahramanmaraş-Pazarcık and Kahramanmaraş-Elbistan districts of Turkey on February 6, 2023, and with magnitudes of 7.7 and 7.6, respectively. These events caused the highest estimated loss recorded in Turkey within the last century from natural disasters. The key reason for the extensive loss was the proximity of eleven cities to the earthquake epicenters
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Smartphone-based bridge frequency identification using vehicle contact-point response Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Chengyin Liu, Yipeng Zhu, Qing Zeng, Xiaodong Wu
Bridge frequency (BF) identification using the vehicle scanning method has attracted considerable attention during the last two decades. However, most previous studies have adopted unrealistic vehicle models, thus finding limited practical applications. This study proposes a smartphone-based BF identification method that uses the contact-point acceleration response of a four degree-of-freedom vehicle
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A comprehensive approach to a variability analysis between earthquake activity and hydro-environmental factors on the Korean Peninsula Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Jae-Kyoung Lee
Following the Pohang and Gyeongju earthquakes and their aftershocks, there is no longer any zone that is safe from earthquake-related disasters in the Korean Peninsula. In order to monitor and predict earthquakes, correlation analysis of earthquakes and hydro-environmental factors are insufficient, and the development and application of hydro-environmental factor measurement equipment is still in the
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Evaluating effectiveness of multiple tuned mass dampers for vibration control of jacket offshore wind turbines under onshore and seafloor earthquakes Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Zuxing Pan, Yingzhou Liu, Wenhua Wang, Xin Li, Shengxiao Zhao, Zhenqiang Jiang, Jin Shang
The dynamic characteristics and structural responses of operation and grid loss offshore wind turbines (OWTs) under onshore and seafloor earthquakes are analyzed based on the established coupled seismic analysis model. In addition to the remarkable influence of the rotor system on the responses of the operation OWT under earthquakes, interactions among the natural modes of the grid loss OWT in the
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Seismic fragility analysis of clay-pile-pier systems considering the optimization of ground motion intensity measures Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Panpan Zhang, Lei Zhang, Zhen Zhang
The performance of clay-pile-pier system under earthquake shaking was comprehensively examined via three-dimensional finite element analyses, in which the complex stress-strain relationships of a clay and piled pier system were depicted by a hyperbolic-hysteretic and an equivalent elastoplastic model, respectively. One hundred twenty ground motions with varying peak accelerations were considered, along
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Ground movement patterns and shallow foundation performance in Iskenderun coastline during the 2023 Kahramanmaras earthquake sequence Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-03 Tugce Baser, Kamran Nawaz, Albert Chung, Seikh Faysal, Ozgun Alp Numanoglu
This study focuses on the field reconnaissance efforts for investigating ground deformation behavior and building foundation performance in Iskenderun. Many structures experienced significant damage or collapsed due to strong ground shaking in the coastal Iskenderun district of Hatay during the 2023 Kahramanmaras earthquake sequence. Many buildings were also impacted by ground failure due to liquefaction
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Simultaneous resonance of an axially moving ferromagnetic thin plate under a line load in a time-varying magnetic field Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-10-02 Xie Mengxue, Hu Yuda, Xu Haoran
In this paper, the simultaneous resonance of a ferromagnetic thin plate in a time-varying magnetic field, having axial speed and being subjected to a periodic line load, is studied. Based on the large deflection theory of thin plates and electromagnetic field theory, the nonlinear vibration differential equation of the plate is obtained by using the Hamilton’s principle and the Galerkin method. Then
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Dynamic response analysis of liquefiable ground due to sinusoidal waves of different frequencies of shield construction Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Jingyue Wang, Xinsheng Ge, Jingyuan Sun, Yasheng Liu, Zhuo Shang, Zhiqiang Wang, Maoguo Tian
Vibration induced by shield construction can lead to liquefaction of saturated sand. Based on FLAC3D software, a numerical model of tunnel excavation is established and sinusoidal velocity loads with different frequencies are applied to the excavation face. The pattern of the excess pore pressure ratio with frequency, as well as the dynamic response of soil mass under different frequency loads before
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Centrifuge tests for seismic response of single pile foundation supported wind turbines in sand influenced by earthquake history Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Yubing Wang, Zhongchang Zhang, Xiaofeng Wu, Bin Zhu
This paper reports on two sets of centrifuge model tests of wind turbines in dry sand and saturated sand subjected to earthquake sequences. The wind turbine system is composed of a single pile foundation and a wind turbine. All tests were applied with liquefaction experiments and analysis projects (LEAP) waves to simplify the analysis. The objectives of the tests are to investigate: (1) the influence
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Electrical resistivity change of saturated sand during reliquefaction under hammering loading Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Binghui Wang, Xing Xiao, Lei Zhang, Liyan Wang, Dandan Jin
The electrical resistivity method was verified as an optional technique to monitor the change of mesostructure of saturated soils. To investigate the change laws of resistivity and analyze the reliquefaction meso-mechanism during the consecutive liquefaction process, five successive impact liquefaction tests were performed in a one-dimensional cubical chamber. The resistivity variation and excess pore
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Analysis on kinematic and inertial interaction in liquefiable soil-pile-structure dynamic system Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Chengshun Xu, Hao Liu, Pengfei Dou, Jinting Wang, Su Chen, Xiuli Du
The dynamic pile-soil interaction in a liquefied site was investigated by means of numerical simulation and shaking table tests in this study. Based on the results from the shaking table experiment, the cross-correlation analysis of the soil displacement-pile bending moment and superstructure acceleration-pile bending moment was performed to study the influence of kinematic interaction and inertial
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A modified generalized scaling law for the similitude of dynamic strain in centrifuge modeling Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Qiang Ma, Daosheng Ling, Di Meng, Kyohei Ueda, Yanguo Zhou
Soil strain is the key parameter to control the elasto-plastic deformation and even the failure processes. To overcome the defect that the strain of the model soil is always smaller than that of the prototype in Iai’s generalized scaling law (GSL), a modified scaling law was proposed based on Iai’s GSL to secure the same dynamic shear strain between the centrifuge model and the prototype by modulating
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Inelastic displacement ratio of low- to mid-rise BRBFs designed under variable levels of seismicity Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Abou-Elfath Hamdy, Ramadan Mostafa
Buckling-restrained braces (BRBs) have shown their capability to provide building structures with stiffness, strength, and ductility. Estimating the seismic drifts of buckling-restrained braced frames (BRBFs) is an important design step to control structural and non-structural damage. In current practice of seismic design, the estimation of seismic drifts of BRBFs is performed by using empirical calculations
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Dynamic soil arching in piled embankment under train load of high-speed railways Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Tingting Niu, Yule Yang, Qianli Ma, Jiuqun Zou, Bin Lin
Piled embankments have many advantages that have been applied in high-speed railway construction engineering. However, the load transfer mechanism of piled embankments, such as soil arching and tension membranes, is still unclear, especially under dynamic loads. To investigate the soil arching and tension membrane under dynamic train loads on high-speed railways, a large-scale piled embankment model
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Numerical simulation on the seismic performance of retrofitted masonry walls based on the combined finite-discrete element method Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Biye Wu, Junwu Dai, Huan Jin, Wen Bai, Bowen Chen
Due to the long construction life, improper design methods, brittle material properties and poor construction techniques, most existing masonry structures do not perform well during earthquakes. The retrofitting method using an external steel-meshed mortar layer is widely used to retrofit existing masonry buildings. Assessing the seismic performance of masonry walls reinforced by an external steel-meshed
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Non-harmonic resonance of viscoelastic structures subjected to time-dependent exponentially decreasing transverse distributed loads Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Nasrin Jafari
In this paper, the non-harmonic resonance of Bernoulli viscoelastic beams, Kirchhoff viscoelastic plates, Timoshenko viscoelastic beams, and Mindlin viscoelastic plates subjected to time-dependent exponentially decreasing transverse distributed load is investigated for the first time. The constitutive equations are expressed utilizing Boltzmann integral law with a constant bulk modulus. The displacement
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Microtremor-based analysis of the dynamic response characteristics of a site containing grouped earth fissures Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Yahong Deng, You Xuan, Huandong Mu, Jiang Chang, Ge Cao, Nainan He, Xunchang Zhao, Longfei Sun
In this study, the Beibu earth fissure site in the northeastern part of Weihe Basin, which contains four nearly parallel earth fissures, was studied. A long straight microtremor measuring line, containing 49 measuring points across four earth fissures, was established to investigate the dynamic response of this site using Fourier spectrum, response acceleration spectrum, Arias intensity, and HVSR analyses
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Hysteretic behavior of post-tensioned precast segmental CFT double-column piers Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Xian Li, Zilin Zhang, Tao Zhou, Yu Xiao, Yushun Sun
Considering the desirable behavior of concrete filled steel tube (CFT) columns and the complicated behavior of segmental double-column piers under cyclic loads, three post-tensioned precast segmental CFT double-column pier specimens were tested to extend their application in moderate and high seismicity areas. The effects of the number of CFT segments and the steel endplates as energy dissipaters on
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Seismic loss assessment of RC high-rise buildings designed according to Eurocode 8 Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Jelena Pejovic, Nina Serdar
A probabilistic seismic loss assessment of RC high-rise (RCHR) buildings designed according to Eurocode 8 and located in the Southern Euro-Mediterranean zone is presented herein. The loss assessment methodology is based on a comprehensive simulation approach which takes into account ground motion (GM) uncertainty, and the random effects in seismic demand, as well as in predicting the damage states
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Earthquake response of wrap faced embankment on soft clay soil in Bangladesh Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-14 Ripon Hore, Sudipta Chakraborty, Kamruzzaman Kamrul, Ayaz Mahmud Shuvon, Mehedi A. Ansary
A wrap-faced embankment model on soft clay soil subjected to earthquake motion was investigated in this study. The study was conducted both experimentally using a shaking table and numerically using PLAXIS 3D software. The amplification of acceleration, displacement, pore water pressure, and strain response were measured while varying input accelerations and surcharge pressures. Time histories of the
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Preliminary investigation of building damage in Hatay under February 6, 2023 Turkey earthquakes Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-07-04 Wang Tao, Chen Jie, Zhou Yujiang, Wang Xiaoqing, Lin Xuchuan, Wang Xiaoting, Shang Qingxue
On February 6, 2023, an Mw7.8 earthquake hit the south of Kahramanmaras prefecture, Turkey, followed by another Mw7.5 earthquake after nine hours in the middle region of the Kahramanmaras prefecture. More than 84,000 buildings collapsed or were severely damaged, and more than 50,000 lives were lost in Turkey and Syria. Some of the authors, as members of Chinese rescue team, entered Antakya, Hatay prefecture
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Experimental and numerical study on cyclic behavior of a UHPC-RC composite pier Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-05-17 Xianzhi Zeng, Shengchun Zhu, Kailai Deng, Canhui Zhao, Yiyun Zhou
Conventional reinforced concrete piers are vulnerable to severe compressive damage under strong earthquake conditions and are difficult to quickly rehabilitate. This paper develops a new type of composite pier, consisting of ultra-high-performance concrete (UHPC) and reinforced concrete (RC). This UHPC-RC composite pier uses a UHPC cover outside of an RC core to achieve a high load-carrying capacity
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Visualization of real-time displacement time history superimposed with dynamic experiments using wireless smart sensors and augmented reality Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-05-17 Marlon Aguero, Derek Doyle, David Mascarenas, Fernando Moreu
Wireless smart sensors (WSS) process field data and inform inspectors about the infrastructure health and safety. In bridge engineering, inspectors need reliable data about changes in displacements under loads to make correct decisions about repairs and replacements. Access to displacement information in the field and in real-time remains a challenge as inspectors do not see the data in real time.
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Seismic response characteristics of nuclear island structure at generic soil and rock sites Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-05-17 Hao Lv, Shaolin Chen
The number of traditionally excellent coastal lithologic nuclear power plants is limited. It is a trend to develop nuclear power plants on soil sites in inland areas. Therefore, the seismic safety and adaptability of non-rock nuclear power plant (NPP) sites are the key concerns of nuclear safety researchers. Although the five site categories are clearly defined in the AP1000 design control documents
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Vertical impedance functions of pile groups under low-to-high loading amplitudes: numerical simulations and experimental validation Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-05-17 Usama Zafar, Chandra Shekhar Goit, Masato Saitoh, Riku Fukuda
Piles in a group experience additional displacements in soil due to pile-to-pile interactions apart from those resulting from the external loading. The effect of these interactions determined assuming soil as an elastic and/or viscoelastic material on pile head impedance functions of the pile group is studied by relating the group stiffness to the static stiffness of a single pile. However, the prevailing
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Experimental investigation and analytically modeling of hysteretic behavior of rigid bus-flexible connectors of 220 kV electrical substations Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-05-17 Tingxuan Tang, Jun He
This paper describes the quasi-static testing and analytical modelling of the hysteretic behavior of aluminum alloy rigid bus-flexible connectors of 220 kV electrical substations. The main objective of the study is to experimentally investigate the hysteretic behavior of six different types of rigid bus-flexible connectors 220 kV electrical substations when subjected to cyclic loading. Another objective
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Damage detection with image processing: a comparative study Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Marianna Crognale, Melissa De Iuliis, Cecilia Rinaldi, Vincenzo Gattulli
Large structures, such as bridges, highways, etc., need to be inspected to evaluate their actual physical and functional condition, to predict future conditions, and to help decision makers allocating maintenance and rehabilitation resources. The assessment of civil infrastructure condition is carried out through information obtained by inspection and/or monitoring operations. Traditional techniques
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Experimental study on the seismic performance of masonry wall reinforced by cement mortar and polypropylene band Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Wenyang Zhao, Qiang Zhou, Quanhuan Min, Lingyu Yang, Baitao Sun, Guquan Song
Since masonry structures are prone to collapse in earthquakes, a novel joint reinforcement method with a polypropylene band (PP-band) and cement mortar (CM) has been put forward. Compared with the common reinforcement methods, this method not only facilitates construction but also ensures lower reinforcement cost. To systematically explore the influence of joint reinforcement on the seismic performance
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Multi-axial unsplit frequency-shifted perfectly matched layer for displacement-based anisotropic wave simulation in infinite domain Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Zhinan Xie, Yonglu Zheng, Paul Cristini, Xubin Zhang
Multi-axial perfectly matched layer (M-PML), known to have lost the perfect-matching property owing to multi-axial coordinate stretching, has been numerically validated to be long-time stable and it is thus used extensively in linear anisotropic wave simulation and in isotropic cases where the PML becomes unstable. We are concerned with the construction of the M-PML for anisotropic wave simulation
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Graph-based structural joint pose estimation in non-line-of-sight conditions Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Alexander Thorns, Zaid Al-Sabbag, Sriram Narasimhan
In post-earthquake surveys, it is difficult (and often infeasible) to observe and quantify displacements beyond line-of-sight (LOS), given seismic force-resisting and gravity systems exist completely or partially within a building’s enclosure. To overcome this limitation, we develop a novel framework that generalizes graph-based state estimation towards structural joint localization via engineered
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Role of dampers on the seismic performance of pin-supported wall-frame structures Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Xiaoyue Wang, Zhe Qu, Ting Gong
Pin-supported (PS) walls have been proven effective in avoiding weak story failure of frame structures by increasing the height-wise continuous stiffness and producing uniform distribution of story drifts. However, little attention has been given to the floor velocity or acceleration responses of PS wall-frame structures, which predominate the seismic damage of various nonstructural components that
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Seismic behavior of steel tubular bridge columns equipped with low-yield-point steel plates in the root replaceable pier Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Haifeng Li, Kaiping Jiang, Yisu Chen, Xue Han
To enable rapid recovery of a steel bridge column after an earthquake, a novel tubular-section steel bridge column equipped with low-yield-point (LYP) steel tubular plates in the root replaceable pier is proposed. For the purpose of discussing the seismic behavior of the novel steel bridge column, quasi-static tests and finite element simulation analyses of the specimens were carried out. The effects
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Robust vision-based displacement measurement and acceleration estimation using RANSAC and Kalman filter Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Jongbin Won, Jong-Woong Park, Min-Hyuk Song, Youn-Sik Kim, Dosoo Moon
Computer vision (CV)-based techniques have been widely used in the field of structural health monitoring (SHM) owing to ease of installation and cost-effectiveness for displacement measurement. This paper introduces computer vision based method for robust displacement measurement under occlusion by incorporating random sample consensus (RANSAC). The proposed method uses the Kanade-Lucas-Tomasi (KLT)
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Prediction of column failure modes based on artificial neural network Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Haitao Wan, Yongle Qi, Tiejun Zhao, Wenjuan Ren, Xiaoyan Fu
To implement the performance-based seismic design of engineered structures, the failure modes of members must be classified. The classification method of column failure modes is analyzed using data from the Pacific Earthquake Engineering Research Center (PEER). The main factors affecting failure modes of columns include the hoop ratios, longitudinal reinforcement ratios, ratios of transverse reinforcement
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Detailed seismic risk analysis of electrical substation equipment using a reliability based approach Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Amir Ghahremani Baghmisheh, Milad Khodaei, Ali Zare Feiz Abadi, Homayoon E. Estekanchi
This paper proposes a risk analysis framework for substation structures based on reliability methods. Even though several risk assessment approaches have been developed for buildings, detailed risk analysis procedures for infrastructure components have been lacking in prior studies. The proposed framework is showcased by its application to a system of interconnected structures at a power substation
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Towards rapid and automated vulnerability classification of concrete buildings Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Lissette Iturburu, Jean Kwannandar, Shirley J. Dyke, Xiaoyu Liu, Xin Zhang, Julio Ramirez
With the overwhelming number of older reinforced concrete buildings that need to be assessed for seismic vulnerability in a city, local governments face the question of how to assess their building inventory. By leveraging engineering drawings that are stored in a digital format, a well-established method for classification reinforced concrete buildings with respect to seismic vulnerability, and machine
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Generation of endurance time excitation functions using spectral representation method Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Parsa Parvanehro, Mohammad Safi
In this study, application of the spectral representation method for generation of endurance time excitation functions is introduced. Using this method, the intensifying acceleration time series is generated so that its acceleration response spectrum in any desired time duration is compatible with a time-scaled predefined acceleration response spectrum. For this purpose, simulated stationary acceleration
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Benchmarking dynamic properties of structures using non-contact sensing Earthq. Eng. Eng. Vib. (IF 2.8) Pub Date : 2023-04-25 Boshra Besharatian, Amrita Das, Abdelrahman Awawdeh, Sattar Dorafshan, Marc Maguire
Non-contact sensing can be a rapid and convenient alternative for determining structure response compared to conventional instrumentation. Computer vision has been broadly implemented to enable accurate non-contact dynamic response measurements for structures. This study has analyzed the effect of non-contact sensors, including type, frame rate, and data collection platform, on the performance of a