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Metaheuristics‐optimized ensemble system for predicting mechanical strength of reinforced concrete materials Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-18 Jui‐Sheng Chou; Ngoc‐Mai Nguyen
This paper develops a novel artificial intelligence (AI)‐based approach, called the metaheuristics‐optimized ensemble system (MOES), to assist civil engineers significantly in achieving accurate estimations of the mechanical strength of reinforced concrete (RC) materials. MOES integrates the advantages of hybrid and ensemble models by combining a metaheuristic optimization algorithm and efficient AI
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Fracture characterization of composite slabs with different connections based on acoustic emission parameters Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-13 Xuhong Zhou; Wenchen Shan; Jiepeng Liu; Jiang Li
Damage fracture characteristics of composite slabs with different connection configurations were analyzed using acoustic emission (AE) with cast‐in‐place (CIP) reinforced concrete (RC) slabs as contrast. AE characteristic parameters were obtained during static experiments and compared with each other. The bearing capacity was directly proportional to cumulative AE energy, rise time, and duration time
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Bayesian approaches for evaluating wind‐resistant performance of long‐span bridges using structural health monitoring data Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-13 Y.W. Wang; Y.Q. Ni; Q.H. Zhang; C. Zhang
Reliable estimation of wind‐induced displacement responses of long‐span bridges is critical to evaluating their wind‐resistant performance. In this study, two Bayesian approaches, Bayesian generalized linear model (BGLM) and sparse Bayesian learning (SBL), are proposed for characterizing the wind‐induced lateral displacement responses of long‐span bridges with structural health monitoring (SHM) data
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Computer vision‐based monitoring of the 3‐D structural deformation of an ancient structure induced by shield tunneling construction Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-13 Xiao‐Wei Ye; Tao Jin; Peng‐Peng Ang; Xue‐Cheng Bian; Yun‐Min Chen
Shield tunneling is an efficient method of the tunnel construction for the system of underground transportation, but it will disturb the surrounding soil and affect the security of nearby structures. The monitoring for deformation of the structures influenced by the tunneling construction is crucial for structural safety evaluation, especially for the ancient structures. The computer vision‐based structural
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Issue Information Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-13
No abstract is available for this article.
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Mechanics‐based model updating for identification and virtual sensing of an offshore wind turbine using sparse measurements Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-15 Mansureh‐Sadat Nabiyan; Faramarz Khoshnoudian; Babak Moaveni; Hamed Ebrahimian
Offshore wind turbines are complex systems operating in harsh environment. The dynamic demands in these systems often differ from values used in design, leading to unexpected mechanical and structural failures. This signifies the importance of remote monitoring technologies for damage diagnosis and prognosis in offshore wind turbines. This study is focused on developing mechanics‐based digital twins
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Reducing human‐induced vibration of cross‐laminated timber floor—Application of multi‐tuned mass damper system Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-04 Haoyu Huang; Chang Wang; Wen‐Shao Chang
As a vibration control technique, tuned mass damper (TMD) system has been shown to be effective in reducing the human‐induced vibration of a cross‐laminated timber (CLT) floor. However, the lightweight property of such a floor means there could be off‐tuning when its mass varies. This study therefore developed a steel‐based multi‐TMD (MTMD) system and a shape memory alloy (SMA)‐based MTMD system to
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Numerical and experimental verification of an inverse‐direct approach for load and strain monitoring in aeronautical structures Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-04 Luca Colombo; Claudio Sbarufatti; Luca Dal Bosco; Davide Bortolotti; Michal Dziendzikowski; Krzysztof Dragan; Franco Concli; Marco Giglio
Aeronautical structures are increasingly aging, and the occurrence of unexpected loads could reduce their operability. A health and usage monitoring system would enable the continuous monitoring of the state of health of a structure and track its aging by a load monitoring system, which aims at the real‐time reconstruction of the loads acting on a structure. However, sometimes the loads and the induced
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Seismic analysis of the tuned‐inerter‐damper enhanced mega‐sub structure system Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-11 Qigang Liang; Luyu Li; Qitao Yang
Mega‐sub structure system (MSSS) is a newly developed super high‐rise system, which can reveal different control effect by designing the mega frame and the sub structure. This paper studies the seismic control of the MSSS using tuned inerter damper (TID), comparing with existing control strategies. First, a simplified model for the MSSS is used to establish the equation of motion of the TID‐enhanced
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Efficient Bayesian FFT method for damage detection using ambient vibration data with consideration of uncertainty Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-01 Feng‐Liang Zhang; Chul‐Woo Kim; Yoshinao Goi
Damage detection is one important target in structural health monitoring (SHM). Vibration‐based damage detection has attracted more attention in the past decades by tracking the modal parameter changes of objective structures. This paper presents the work on developing a novel Bayesian fast Fourier transform (FFT) method for damage detection using the Bayes factor based on ambient vibration data. Based
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Dynamic behavior of multilayer suspension equipment and adjacent post insulators with elastic‐viscous connections Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-04 Zhenyu Yang; Qiang Xie; Chang He
In an electrical substation or converter station, suspension equipment is connected to an adjacent post insulator by a rigid busbar or flexible conductors if the horizontal displacement is significant. In order to investigate the coupling effect between suspension and post equipment connected by a rigid busbar, a scaled‐down model based on a multilayer suspended thyristor valve and an adjacent post
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Fiber optic sensing of concrete cracking and rebar deformation using several types of cable Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-16 Shenghan Zhang; Han Liu; Abdoul Aziz Sandotin Coulibaly; Matthew DeJong
Distributed fiber optic sensing (DFOS) is increasingly being applied in civil engineering. One recently emerging type of DFOS, Optical Frequency Domain Reflectometry (OFDR), offers improved accuracy and resolution. This paper presents an experimental study that investigates the ability of OFDR, implemented using several types of fiber optic cable, to detect concrete cracking and large strain steel
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Assessment of the tuned mass damper inerter for seismic response control of base‐isolated structures Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-11 Chiara Masnata; Alberto Di Matteo; Christoph Adam; Antonina Pirrotta
In this paper, the hybrid control of structures subjected to seismic excitation by means of tuned mass damper inerter (TMDI) and base‐isolation subsystems is studied with the aim of improving the dynamic performance of base‐isolated structures by reducing the displacement demand of the isolation subsystem. The seismic performance of TMDI hybrid controlled structures is investigated in a comparative
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Monitoring dynamic characteristics of 600 m+ Shanghai Tower during two consecutive typhoons Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-22 Jie Wu; Ningtao Hu; You Dong; Qilin Zhang
Though the dynamic performance of high‐rise buildings under wind has been widely investigated, there have been relatively limited studies focusing on the wind effects on 600 m+ super high‐rise buildings based on real measured data during typhoons. This paper presents the field measurement results of structural dynamic characteristics and wind‐induced responses of the Shanghai Tower with a height of
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Relationship modeling between vehicle‐induced girder vertical deflection and cable tension by BiLSTM using field monitoring data of a cable‐stayed bridge Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-12 Yadi Tian; Yang Xu; Dongyu Zhang; Hui Li
Structural health monitoring (SHM) systems have been widely implemented in long‐span bridges to measure various structural responses. It is difficult to directly perform condition assessment from the variations in structural responses because of initial residual stress and defaults, coupling effects of structure damage and external loads, and others. To fix these problems, this study proposes global
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Temperature error in a hydrostatic leveling system and its reduction Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-12 Roman V. Tsvetkov; Sergey V. Lekomtsev; Valery V. Yepin
Hydrostatic leveling systems (HLS) are used for long‐term measurements of vertical displacements and inclination of various objects. The temperature gradient caused by inhomogeneous and time‐variable environmental conditions can lead to a significant error. Experimental studies carried out in this paper demonstrated that the accuracy of the system can be improved through forced circulation of the fluid
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Durability control through design and health monitoring during construction Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-02 Andrés Antonio Torres‐Acosta; Pedro Castro‐Borges
Durability control through design and health monitoring of a new viaduct (bridge), to achieve an 80‐year service life, is discussed. Manufacture of durable concrete is also discussed and deals mainly with the geometry/shape selection of the structural elements and materials selection (especially the adequate cement type and mineral additions to decrease concrete's porosity). Durability health monitoring
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Determination of flexible pavement deterioration conditions using Long‐Term Pavement Performance database and artificial intelligence‐based finite element model updating Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-22 Yong Deng; Xue Luo; Yazhou Zhang; Shengxin Cai; Kai Huang; Xijun Shi; Robert L. Lytton
This paper aims to provide a methodology in determining the deterioration conditions of flexible pavements using the Long‐Term Pavement Performance (LTPP) database and artificial intelligence (AI)‐based finite element (FE) model updating. A new term quantifying the effects of the aging and load repetitions on the modulus gradient of the asphalt layer was defined. The modulus gradient change was captured
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Vibration health monitoring of rolling bearings under variable speed conditions by novel demodulation technique Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-20 Dezun Zhao; Len Gelman; Fulei Chu; Andrew Ball
Time‐varying fault impulse amplitude and time‐varying fault impulse interval are the main challenges for rolling bearing fault diagnosis under variable speed conditions. In this paper, a vibration‐based rolling bearing fault characteristic frequency (FCF) estimation and novel diagnosis method under time‐varying rotational speeds are proposed, using the demodulation transform. First, the FCFs with weak
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Characterization of shape memory alloy energy dissipators for earthquake‐resilient structures Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-11 Amedebrhan M. Asfaw; Osman E. Ozbulut
In this paper, a new shape memory alloy (SMA) damping device named confined superelastic dissipator (CSD) was examined. The proposed dissipator consists of a fused superelastic nickel‐titanium (NiTi) SMA bar as the functional kernel component encased in grout‐filled steel tube. The bar carries the axial load and dissipates energy through axial deformation while the steel tube and infill grout restrain
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Development of a low‐power wireless acoustic emission sensor node for aerospace applications Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-11 Stephen Grigg; Rhys Pullin; Matthew Pearson; David Jenman; Robert Cooper; Andrew Parkins; Carol Ann Featherston
Acoustic emission (AE) is the spontaneous release of energy caused by the growth of damage, the monitoring of which gives an indication of the presence of damage within a structure. The current standard for AE localisation is difficult to apply in a low‐power system as sensors must either be wired together or Node's time synchronised, which is power intensive. This paper proposes the use of a method
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Indirect health monitoring of bridges using Tikhonov regularization scheme and signal averaging technique Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-10 C G Krishnanunni; B N Rao
This paper presents a novel damage identification technique for bridges based on the dynamic response of a moving vehicle. A quarter car vehicle model instrumented with two accelerometers and an inertial profilometer is used for this purpose. The method involves the coupling of Tikhonov regularization scheme with signal averaging technique to handle the problem of measurement noise and road roughness
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Outlier analysis for defect detection using sparse sampling in guided wave structural health monitoring Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-07 Jagadeeshwar L. Tabjula; Srijith Kanakambaran; Sheetal Kalyani; Prabhu Rajagopal; Balaji Srinivasan
We propose an outlier detection‐based statistical approach to identify and locate a defect in composite plates using far fewer number of sensing points compared to conventional imaging techniques. The key steps involved in this computationally inexpensive approach are the random sparse selection of the sensing points through Poisson disk sampling, followed by a two‐step outlier detection process based
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Experimental modal analysis of structural systems by using the fast relaxed vector fitting method Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-06 Marco Civera; Giulia Calamai; Luca Zanotti Fragonara
System identification (SI) techniques can be used to identify the dynamic parameters of mechanical systems and civil infrastructures. The aim is to rapidly and consistently model the object of interest, in a quantitative and principled manner. This is also useful in establishing the capacity of a structure to serve its purpose, thus as a tool for structural health monitoring (SHM). In this context
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Pipeline leakage monitoring experiments based on evaporation‐enhanced FBG temperature sensing technology Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-05 Mengya Sun; Bin Shi; Dan Zhang; Chenxi Feng; Jinghong Wu; Guangqing Wei
The water distribution systems in utility tunnel are considered as the lifeline projects. The leakage monitoring of water supply and drainage pipelines is closely related to the overall operation and safety of the utility tunnel. However, conventional pipeline leakage monitoring methods are difficult to realize the monitoring of ordinary temperature liquid and small leakage. Moreover, they also have
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Hybrid hydraulic‐seasonal‐time model for predicting the deformation behaviour of high concrete dams during the operational period Struct. Control Health Monit. (IF 3.499) Pub Date : 2021-01-05 Guang Yang; Hao Gu; Xudong Chen; Kupeng Zhao; Dong Qiao; Xingquan Chen
Considering the limitations of the traditional hydraulic‐seasonal‐time (HST) model, this study proposes a hybrid modeling method for the deformation prediction of high concrete dams during the operational period. First, the elastic finite element (FE) method is applied to simulate the interactive effects of structural properties, topography, geology, and high hydrostatic load on the deformation behaviour
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Optimal design of TVMD with linear and nonlinear viscous damping subjected to white‐noise excitation Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-29 Huating Chen; Ping Tan
This paper investigates the optimal design of the tuned viscous mass damper (TVMD) with linear and nonlinear viscous damping subjected to white‐noise excitation. The TVMD consists of a parallel‐connected inerter and dashpot, and a spring attached to the main structure. To examine the vibration control performance of the TVMD, both theoretical analysis and numerical optimization are conducted to obtain
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Accuracy and sensibility analysis of strain measurement based on microimages captured by smartphone with a microscope Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-28 Botao Xie; Jinke Li; Xuefeng Zhao
Strain measurement is an essential part of structural health monitoring (SHM). The objective of the study is to propose a new method to measure strain on the surface of a structure. The speeded‐up robust feature (SURF) method was applied to detect and trace feature points in microimages that were obtained using a smartphone with a compact microscope. Subsequently, the average displacement of feature
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Fatigue damage detection and growth monitoring for composite structure using coda wave interferometry Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-27 Hyung Jin Lim; Hyunseong Lee; Travis Skinner; Aditi Chattopadhyay; Asha Hall
This paper presents the development of a fatigue damage detection and growth monitoring technique based on coda wave interferometry (CWI) for composite structures. The time domain distortion (TD) component of coda waves, which is typically ignored as noise in the literature, is used and experimentally validated. First, a widely used signal processing method for CWI called the stretching method is applied
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Fundamental equation based on pole allocation for interstory seismic isolation of buildings Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-23 Yoshiki Ikeda
An inverse problem is formulated based on the pole allocation method in control theory, for a building with an interstory seismic isolation system. The structural system is simplified as a three‐degree‐of‐freedom lumped‐mass shear model. The natural frequencies and the corresponding damping ratios in the three vibration modes are set as the initial control target. To achieve this target, the introduced
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Issue Information Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-18
No abstract is available for this article.
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Time‐varying frequency‐based scaled flexibility identification of a posttensioned concrete bridge through vehicle–bridge interaction analysis Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-20 Yongding Tian; Lin Wang; Jian Zhang
Dynamic testing methods have been widely used in engineering practice for investigating dynamic properties of bridges; however, only basic dynamic parameters (i.e., natural frequencies, damping ratios, and unscaled modal shapes) can be identified, which are insufficient for condition assessment and health monitoring. To address this limitation, this article takes a three‐span posttensioned concrete
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An adaptive PCA‐based method for more reliable ultrasonic guided waves SHM: Data‐driven modeling and experimental validation in high attenuating medium Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-11 Mahjoub El Mountassir; Slah Yaacoubi; Gilles Mourot; Didier Maquin
This paper proposes a monitoring method for defect detection and localization in a structure operating under environmental and operational conditions (EOCs) variation. This method is based on a model obtained using PCA of the healthy state data. To account for variation in EOCs, more particularly temperature change, the model is updated using a moving window over the collected signals. Defect detection
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Efficient and high‐precision time synchronization for wireless monitoring of civil infrastructure subjected to sudden events Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-12 Yuguang Fu; Kirill Mechitov; Tu Hoang; Jong R. Kim; Shazim A. Memon; Billie F. Spencer
The implementation of a wireless smart sensor network (WSSN) to monitor a structure subjected to sudden events (e.g., earthquakes) poses many challenges. One typical challenge is to synchronize the data from different sensors during event‐triggered sensing, because each wireless sensor has its own independent clock and their triggering time is generally different and unknowable. The challenge becomes
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Input energy reduction principle of structures with generic tuned mass damper inerter Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-15 Zhipeng Zhao; Ruifu Zhang; Chao Pan; Qingjun Chen; Yiyao Jiang
The incorporation of the inerter with tuned mass damper yields the inerter‐based tuned mass damper that has been verified as effective lightweight or performance‐enhanced control devices. This study theoretically proved an intrinsic effect, namely, the input energy reduction, that the inerter reduces the input energy transmitted into the controlled structures from ground motion. A generic tuned mass
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Measuring scour level based on spatial and temporal image analyses Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-20 Wan Hanna Melini Wan Mohtar; Anuar Mikdad Muad; Mojtaba Porhemmat; Hafifah Ab. Hamid; Shahirah Shahrizat Whayab
Scour monitoring is an important measurement process to determine the soil erosion level at the pillar of bridge. Image‐based approach is attractive because it allows monitoring process to be conducted continuously without halting the flow of the water during experiment. Scour images provide abundance of information from a single source of camera sensor. However, this information may appear in different
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Hybrid data + model‐based submodeling method for a refined response estimation at critical locations Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-15 Bhavana Valeti; Shamim N. Pakzad
The complex geometry of structural components results in uneven stress distribution in structures under loading. The regions with stress concentrations often act as critical locations from where damages can initiate and propagate under different types of loading. Accurate estimation of stress distribution, especially at such critical locations, is vital for a more reliable prediction of possible damage
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Experimental verification of constrained minimum variance unbiased estimator for simultaneous input and state estimation of Bounded Input and Bounded Output (BIBO) type Bouc–Wen hysteretic structural system Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-05 Pranjal Tamuly; Arunasis Chakraborty; Sandip Das
Constraint minimum variance unbiased estimator is improvised for simultaneous input and parameter estimation of the Bouc–Wen hysteretic system of a full‐scale bridge pier. The essential structural properties in this case (i.e., bounded input and bounded output) are incorporated in the form of constraint conditions along with degradation and pinching effects. To demonstrate the efficiency of this algorithm
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Piezoelectric‐based hoop‐type interface for impedance monitoring of local strand breakage in prestressed multi‐strand anchorage Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-22 Ngoc‐Loi Dang; Quang‐Quang Pham; Jeong‐Tae Kim
In this study, a piezoelectric‐based interface technique for impedance measurement is presented to monitor local strand breakage in multi‐strand anchorage systems. Firstly, a hoop interface‐based impedance measurement model is designed based on stress behaviors of the multi‐strand anchorage. Coupled dynamic behaviors between the lead zirconate titanate (PZT) interface and the target tendon anchorage
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Probabilistic forecast of wind speed based on Bayesian emulator using monitoring data Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-27 Xiao‐Wei Ye; Yang Ding; Hua‐Ping Wan
Wind speed forecasting can serve a wide spectrum of purposes, including scheduling of a power system and dynamic control of structures. A lot of models are widely used to forecast wind speed, consisting of deterministic models (e.g., physical models, statistical models, and artificial intelligence models) and probabilistic models (e.g., Bayesian model). The wind speed has the characteristics of random
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Deep‐learning‐based guided wave detection for liquid‐level state in porcelain bushing type terminal Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-03 Xiaobin Hong; Bin Zhang; Yuan Liu; Hongchang Qi; Weihua Li
The structural security of civil energy equipment is significant for the steady operation of power supply system, and porcelain bushing type terminal is a typical energy equipment that needs long‐term monitoring. As a nondestructive structural health monitoring method, ultrasonic guided wave (UGW) technology is extremely suitable for state detection of energy equipment. However, most current UGW methods
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A framework for hybrid simulation with online model updating suitable for hard real‐time computing Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-23 Giuseppe Abbiati; Igor Lanese; Saeed Eftekhar Azam; Oreste S. Bursi; Alberto Pavese
The hybrid simulation method is used to test one or some components of a prototype structure subjected to a plausible loading history, accounting for their interaction with the untested ones, which are simulated numerically. If tested components have similar numerical counterparts, a possible approach to reduce simulation errors is to update the parameters of numerical substructures based on tested
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Arc Length method for extracting crack pattern characteristics Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-10-23 Amir Hossein Asjodi; Mohammad Javad Daeizadeh; Mohammadjavad Hamidia; Kiarash M. Dolatshahi
Although manual crack inspection has been widely used for structural health monitoring over the last decades, the development of computer vision methods allows continuous monitoring and compensates the human judgment inaccuracy. In this study, an image‐based method entitled Arc Length method is introduced for extracting crack pattern characteristics, including crack width and crack length. The method
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Bayesian estimation approach based on modified SCAM algorithm and its application in structural damage identification Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-03 Yinan Zhao; Maosheng Gong; Zhanxuan Zuo; Yanbin Gao
The single‐component adaptive Metropolis (SCAM) algorithm, as one of the Markov chain Monte Carlo (MCMC) sampling methods, is very effective at solving high‐dimensional posterior joint probability distributions. However, studies show that the SCAM algorithm is prone to generating duplicate samples, thus lowering the sampling efficiency and causing large calculation errors. To solve this problem, a
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Optimization‐based seismic design of steel moment‐resisting frames with nonlinear viscous dampers Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-03 Ohad Idels; Oren Lavan
An optimization approach for the seismic design of yielding moment‐resisting frames (MRFs) with nonlinear fluid viscous dampers (FVDs) is presented. As the optimal design of new buildings is addressed, no parameters are set a priori, and the properties of both the structural elements and the dampers are simultaneously optimized. The goal of the optimization is to minimize the cost of the system (structure
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Wire breaking localization of parallel steel wire bundle using acoustic emission tests and finite element analysis Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-14 Shengli Li; Zhenwen Liu; Lianxue Xia; Yong Wang; Hu Feng
The precise localization of cable damage is a major issue in bridge engineering. The acoustic emission (AE) method has been applied to detect defects for cable structures in bridges. In this paper, an AE localization method is proposed to localize both lateral and longitudinal positions of defects in a parallel steel wire bundle composed of seven steel wires. The proposed method is verified numerically
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Experimental study of new axial recentering dampers equipped with shape memory alloy plates Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-14 Nadia M. Mirzai; Han Min Cho; Jong Wan Hu
The most important issues that researchers are faced with are extensive damages and permanent deformations in the structures after earthquakes. This study proposes new hybrid smart dampers combined with shape memory alloy (SMA) plates, friction devices, and polyurethane springs (e.g., ASFP damper) with an aim to decrease structural damage as well as to mitigate residual deformation in the concentrically
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Dissipative steel exoskeletons for the seismic control of reinforced concrete framed buildings Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-12 Fabio Mazza
The insertion of steel bracing systems equipped with dissipative devices is a widely used technique for the seismic retrofitting of reinforced concrete (r.c.) framed buildings; yet, few attempts have been made so far to construct an external arrangement in the form of a double skin. The dissipative exoskeleton (DEX) appears convenient from energetic and functional points of view. It eliminates the
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Shape memory alloy‐based centrifugal stiffening for response reduction of horizontal axis wind turbine blade Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-11 Sourav Das; M. Mohamed Sajeer; Arunasis Chakraborty; Saptarshi Sarkar
The aim of this study is to reduce the deformation of large horizontal axis wind turbine blades using shape memory alloy (SMA)‐based centrifugal stiffening. A discrete model considering dominant modes of the tower, drive train and blades is developed in this study to demonstrate the performance of the proposed stiffening strategy. Here, super‐elastic behaviour of SMA is characterized by Graesser‐Cozzarelli
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On the wind‐induced motion of unbonded fiber‐reinforced elastomeric isolators: Designing for habitability Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-09 Saba Chaghakaboodi; Hamid Toopchi‐Nezhad
A large number of studies have verified the satisfactory seismic performance of unbonded fiber‐reinforced elastomeric isolators (UFREIs). Typically, the total height of a UFREI will be shorter than its conventional elastomeric isolator counterpart. The shorter height results in a relatively larger isolator initial horizontal stiffness. The relatively large initial stiffness and damping values of UFREIs
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Development and application of random forest technique for element level structural damage quantification Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-06 Chencho; Jun Li; Hong Hao; Ruhua Wang; Ling Li
This paper presents element level structural damage quantification using an ensemble‐based machine learning technique, namely, random forest technique, with acceleration responses from structures. The ensemble‐based approach provides a better prediction than an individual model. Random forest is a machine learning algorithm which has several decision trees to perform a task. The proposed approach develops
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Formulation of human–structure interaction for vibration serviceability of steel–concrete composite floors Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-06 Liang Cao; Y. Frank Chen
In this paper, an analytical model representing the human–structure interaction (HSI) system of steel–concrete composite floors under human vibrations is described and discussed. In the theoretical analysis, the human and composite floor are idealized as the subsystems represented by a linear oscillator model and the anisotropic rectangular plate, respectively. The analytical formula for the natural
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Multilaser spot tracking technology for bridge structure displacement measuring Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-03 Oleksandr P. Maksymenko; Oleksandr M. Sakharuk; Yaroslav L. Ivanytskyi; Petro S. Kun
During the structural health monitoring of bridge structures, simultaneous noncontact determination of relative displacements in different points is preferred. The existing measurement displacement methods and systems used for bridge structures deprived of this ability or have the low accuracy and thus automation level that makes their usage for long‐term monitoring of bridge structure elements becomes
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Optimal design of tuned inerter dampers with series or parallel stiffness connection for cable vibration control Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-02 Xiang Shi; Wei Shi; Kun Lin; Lanchang Xing; Songye Zhu
Inerter dampers (IDs) and other inerter‐based vibration absorbers have elicited growing interest for vibration mitigation of stay cables. This study systematically investigates the vibration mitigation mechanism of tuned IDs (TIDs) for stay cables based on a continuous cable model. A TID consists of an ID connected with a spring stiffness in series (TID‐S) or parallel (TID‐P). On the basis of systematical
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Damage identification of suspender cables by adding virtual supports with the substructure isolation method Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-02 Jilin Hou; Chao Li; Łukasz Jankowski; Yongkang Shi; Li Su; Sheng Yu; Tiesuo Geng
Damage of bridge cables is mainly manifested as the decrease in cable forces. These forces are affected by the boundary conditions, cable length, cable stiffness, and cable appendages, making it hard to identify the cable forces. Based on the substructure isolation method, this study proposes an approach for cable force identification to judge cable damage by adding virtual supports to each cable so
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Durability health monitoring during construction of concrete structures in marine environment Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-02 Andrés Antonio Torres‐Acosta; Alberto Patrón‐Solares; Pablo Alcántara‐Lagunes
A new methodology for durability health monitoring for a bridge structure during construction was developed by monitoring concrete's saturated electrical resistivity (ρS), rapid chloride permeability (RCP), and the apparent chloride diffusion coefficient (DAP) indices. Results were compared with same durability indices collected previously from in‐service bridges located along the Gulf of Mexico (Florida
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Experimental determination of structural damping of a full‐scale building with and without tuned liquid dampers Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-12-01 Marius Tarpø; Christos Georgakis; Anders Brandt; Rune Brincker
The theory of vibration absorbers is well established, but the literature lacks documentation of the actual performance of absorbers installed in tall buildings. This paper presents an experimental assessment of the dynamic characteristics of one of two identical high‐rise towers of the European Court of Justice in Luxembourg, before and after the activation of tuned liquid dampers, tuned to the frequency
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Vibration‐based monitoring of a small‐scale wind turbine blade under varying climate conditions. Part I: An experimental benchmark Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-08 Yaowen Ou; Konstantinos E. Tatsis; Vasilis K. Dertimanis; Minas D. Spiridonakos; Eleni N. Chatzi
Structural health monitoring (SHM) has been increasingly exploited in recent years as a valuable tool for assessing performance throughout the life cycle of structural systems, as well as for supporting decision‐making and maintenance planning. Although a great assortment of SHM methods has been developed, only a limited number of studies exist serving as reference basis for the comparison of different
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Cover Image Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-04 Ye Xia; Xiaoming Lei; Peng Wang; Guoming Liu; Limin Sun
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Issue Information Struct. Control Health Monit. (IF 3.499) Pub Date : 2020-11-04
No abstract is available for this article.
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