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Shear Lag Effect in Welded Single Angle Tension Member Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-04-15 Jagdish R. Dhanuskar, Laxmikant M. Gupta
The typical failure of a welded single angle tension member is a gross section failure. The rupture strength of the single angle tension member is affected by the effect of shear lag. Full-scale tests on twenty-seven single angle specimens reported in this paper. Four different angle sections with four different section types were used in the test. The test parameter includes the steel's grade, length
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Analysis of Carrying Capacities of Connections with Different Bolt End Distances Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-04-01 Zhonggen Xu, Xuan Guo, Qian Chen, Dejun Xiao, Changgen Deng
In view of the differences between Chinese and German regulations of bolt end distance, experiments for connection specimens with different bolt end distances were designed and conducted. The finite element models took into account the material nonlinearities, geometry nonlinearities and contact nonlinearities. The major factors were selected, and parametric studies were performed. It is found that
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Experimental evaluation of new channel shear connector shapes Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-19 Bilal Maghaghi, Messaoud Titoum, Aida Mazoz
In a steel–concrete composite beam, the channel shear connector is an easy solution to ensure the connection due to its availability and the simplicity of its welding. However, increasing the channel shear connector length negatively affects the concrete slabs and creates difficulties to cross the longitudinal reinforcing bars. To solve this problem, five new channel shear connector shapes are proposed
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Post-buckling Strength of Welded Steel I-Girders with Corrugated Webs Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-18 Xuqun Lin, Harry Far
Steel I-section-plate girders with corrugated webs have been used worldwide as they provide more stability and light beam features in practical design. It is known from previous investigations that due to having numerous favourable properties, the corrugated-web beams have been used in different areas of structural engineering. Considering the raising popularity of using CWBs in steel design, some
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Simultaneous Multi-objective Optimization of Semi-active Intermediate Isolation System and Building Structure Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-17 Hyun-Su Kim, Joo-Won Kang
Recently, to reduce seismic responses, dozens of high-rise buildings in Japan and Korea have adopted the intermediate isolation system (IIS). These applications have shown successful response reduction performance for tall buildings. The important dynamic responses of building structures with the IIS are the peak intermediate isolator drift (IID), and the peak inter-story drift (ISD). The semi-active
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Elevated Temperature Effect on the Dynamic Characteristics of Steel Columns and Frames Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-17 Yunus Emrahan Akbulut, Ahmet Can Altunişik, Hasan Basri Başağa, Sara Mostofi, Ayman Mosallam, Louai F. Wafa
Fire performance of load bearing elements in steel buildings such as columns and frames has major importance for structural designers. This study aims to assess the elevated temperature effect on dynamic characteristics of steel columns and frames by conducting sequential heat transfer and modal analyses. A series of finite element analyses including heat transfer analysis aere performed on 62 different
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Analysis of Finite Element Mechanism of Axial Compressive Behavior of T-Shaped Stiffened Concrete-Filled Steel Tubular Stub Columns After Uniform Fire Exposure Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-17 Tong Zhang, Xuetao Lyu, Haiqing Liu, Yang Yu, Yang Xu
Based on the reasonable determination of material constitutive relationship and interaction model between concrete and steel tube, a finite element model of T-shaped stiffened concrete-filled steel tube (TSCFST) stub column exposed to uniform fire was established, and model reliability was verified. Through the FE model, the working mechanism of the model in the whole process of loading was analyzed
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Effect of the Uncorrelated Profile of Rails on Train-Track-Ground Induced Vibrations Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-16 Omer Javaid, Dong-Ho Choi
In predicting the track-ground vibrations induced by moving trains, it is generally assumed that the irregularities of two rails of a track are identical and fully correlated. This assumption leads to identical contact forces at the contact point of wheels and rails. In the present paper, the uncorrelated profile of the two rails is considered to investigate their influence on the train-track-ground
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Panting Fatigue of Trapezoidal Corrugated Steel Webs with Mixed-Mode Cracks Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-11 Zhi-Yu Wang, Xiafang Zhou, Zifeng Liu
Trapezoidal corrugated steel webs under panting fatigue are represented by repeated cyclical out-of-plane deflections of their subpanel with mixed-mode cracks. Compared to stiffened flat webs, notable fatigue crack formation could take place along with local deflection. Fatigue tests were conducted for nine composite girders with slender webs and varied corrugation dimensions. Nearly all test girders
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Effect of Torsion on Seismic Response of Single-Story Structures: an Energy-Based Design Approach (EBD) Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-10 Sang-Hoon Oh, Seung-Hoon Shin, Bahador Bagheri
Torsion of structural frames is one of the main causes of damage to structures during earthquakes. Accordingly, this study investigated the effects of torsion on frame structures with different asymmetries in stiffness when subjected to earthquakes with natural translational vibration period of less than 1.00 s. In this study, an idealized single-story lateral load resisting system was considered,
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The In-Plane Effective Length Factor of Web Members of the Steel Truss Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-08 Liang Zheng, Xinrong Qu, Ying Gao, Hong Guo
In the code for design of steel structures, the effective length factor of the support and other web members of the steel trusses composed of double angle steel were taken as 1.0 and 0.8, respectively. However, the effective length factor of the support and other web members did not take into account factors such as the stiffness provided by non-adjacent members, the stiffness of the joint itself,
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Seismic Design Optimization of Steel Frames with Steel Shear Wall System Using Modified Dolphin Algorithm Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-07 Amir Saedi Daryan, Mohadeseh Salari, Neda Farhoudi, Soheil Palizi
The first step in any successful design of a structure is selecting the exact and accurate designing method. Designing a structure most economically (i.e. materials such as steel and concrete) by satisfying seismic and gravity criteria based on codes of practice is a complicated procedure that requires not only technical engineering knowledge but also years of experience. Thus, this paper presents
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Design Procedure and Ultimate Capacity of New Turnbuckle for Measuring Tensile Force Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-03-02 Swoo-Heon Lee, Kyung-Jae Shin, Hye-Min Shin, Hee-Du Lee
A turnbuckle is a device that is installed between tension wires or rods for the purpose of adjusting the tensile force and length of tension members. Tensile force can be adjusted by rotating the body of turnbuckle but the conventional turnbuckle is incapable of measuring tensile force without specific measurement equipment such as a load cell, accelerometer and data logger, etc. New turnbuckles have
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Flutter Control of Long Span Suspension Bridges in Time Domain Using Optimized TMD Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-20 Hamed Alizadeh, Seyed Hossein Hosseni Lavassani
Suspension bridges due to their long span are susceptible against dynamic events, like air flow which can cause considerable problems for them. Flutter, as an aerodynamic phenomenon, makes bridges vibrate, whereas their amplitude gradually diverges, needed the vibration control strategies. Tuned mass damper or in brief TMD, as the simplest passive device, can be used for this purpose. The performance
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Experimental Study on Mechanical Properties of Q690 High Strength Steel in Marine Corrosive Environment Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-18 Hongchao Guo, Tianqi Lei, Jinguang Yu, Defa Wang, Xiaolei Li
In order to study the mechanical property degradation rule of Q690 high-strength steel in the ocean wave splash area, the rusted specimen is obtained by indoor damp heat surrounding soaking environment corrosion test. The scanning electron microscopy, uniaxial tensile and cyclic loading tests of corroded steel are performed. This paper analyzes the steel from elastic modulus, yield strength, ductility
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Seismic Retrofitting Effect of RC Buildings using Perimeter Steel Moment Frames Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-18 Seonwoong Kim
This paper investigates the retrofitting effect for a non-ductile reinforced concrete frame strengthened by perimeter steel moment frames with indirect connection, which ameliorates the direct connection’s problems. To this end, first, full-scale tests were conducted to address the structural behavior of a two-story reinforced concrete frame with non-seismic details (non-seismic specimen), and a WAS
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The Effect of Nonlinear Behavior of Bolted Connections on Dynamic Analysis of Steel Transmission Towers Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-15 Davoud Nezamolmolki, Ahmad Shooshtari
Transmission towers are kinds of complex lattice structures which affects their accurate modeling and analysis and brings about some problems in the prediction of their actual behavior. For this reason, full-scale experiments are usually applied for transmission towers to examine their resistance and control their behavior. In this paper, the displacements of a transmission tower in the full-scale
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The Effect of Geometry on Structural Behavior of Buildings with Steel Plate Shear Wall System Subjected to Blast Loading Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-14 Mohammad Shabanlou, Hassan Moghaddam, Amir Saedi Daryan
Many important public buildings have suffered significant damages due to terrorist attacks in the last few decades. This paper investigates the behavior of structures with steel plate shear wall lateral load resisting system under various blast loadings. A number of twenty steel frames with different heights and widths subjected to four different blast scenarios are modeled and analyzed in opensees
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An Analytical–Numerical Hybrid Method for Evaluating Out-of-Plane Stability of Buckling Restrained Braces Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-13 Yun Zhou, Chen Gong, Gen-Quan Zhong, Shi-yu Tian, Ming-Xiang Xiong
Out-of-plane stability of buckling restrained braces (BRBs) has been a critical concern for structural design of them under seismic loads. Although some calculation methods are available in literature catering for the determination of stability resistance of the BRBs, they showed complexities on dealing with numbers of parameters. In this paper, the mechanism of out-of-plane buckling failure of the
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Stochastic Approach on Safe Designing of Double Layer Grid Space Structure against Member Length Imperfections Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-13 Hakan T. Türker
The imperfections in Double Layer Grid Space Structure (DLGSS) threaten the safety of designs. The imperfections in the member length of DLGSS may result from human-based causes such as manual cuts, tolerance sensitivity in CNC cuttings and variation in temperature. Therefore, analyzing the impacts of imperfections is vital to ensure the safety of DLGSS systems. Thus, a safe design of DLGSS against
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Numerical Investigation of Energy Dissipation Device to Improve Seismic Response of Existing Steel Buildings with Soft-First-Story Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-13 Masoud Ahmadi, Mehdi Ebadi Jamkhaneh
Retrofitting buildings in densely populated areas with a soft story configuration on the first floor can pose a daunting challenge to the community. Against this backdrop, this study set out to evaluate the seismic retrofit strategy's adequacy in enhancing the seismic performance of buildings with a soft story. The proposed strategy utilizes an earthquake energy dissipation device consisting of a combination
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Enhanced Cross-Tension Property of the Resistance Spot Welded Medium-Mn Steel by In Situ Microstructure Tailoring Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-11 Bingge Zhao, Yuanfang Wang, Kai Ding, Guanzhi Wu, Tao Wei, Hua Pan, Yulai Gao
Medium Mn steels, one of the most promising 3rd generation advanced high strength steels (AHSS), achieve an encouraging trade-off between the outstanding mechanical property and the production cost. As a typical medium Mn steel, 7Mn steels have superior mechanical property but their poor cross-tension property becomes the Achilles' heel, hindering the application in the automotive industry. The current study
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Numerical Investigation of Steel Moment-Resisting Frame on Sandy Soil Under Normal Fault Rupture Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-08 Omid Nooralizadeh Keshteli, Speideh Rahimi, Mehdi Ebadi Jamkhaneh
Recent earthquakes have shown that the interaction between faults and structures could cause extensive damage to the surface and underground structures. Field observations showed that the need for design regulations for fault rupture due to fault movement in areas with active faults seems necessary. In this study, the three-dimensional finite element (FE) model in the Abaqus FE program to study the
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Experimental and Fracture Model Study of Q690D Steel Under Various Stress Conditions Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-04 Xuewei Huang, Jianzhou Ge, Jun Zhao, Wei Zhao
The fracture failure of high-strength steel has an important relationship with the stress state. In order to predict the fracture failure of high-strength steel under different stress conditions, based on the void growth model (VGM), a fracture model which comprehensively considers the effect of stress triaxiality and the Lode parameter on fracture failure is proposed and is called LVGM. A batch of
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Extended End Plate Long Bolted Joint Using Cold Formed Steel Hollow and Concrete Filled Column Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-04 M. SenthilPandian, M. Helen Santhi, Baskar Gopalan
The objective of this study is to investigate the moment-rotation behaviour of the extended end plate long bolted moment connection using numerical, experimental and component method approaches. Totally thirty six models of the cold formed steel beam-column (hollow and concrete filled column) connection with different arrangement of long bolts are modeled and analysed using the finite element software
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Rapid Prediction of Long-term Deflections in Steel-Concrete Composite Bridges Through a Neural Network Model Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-02-02 Sushil Kumar, K. A. Patel, Sandeep Chaudhary, A. K. Nagpal
This paper proposes a closed-form expression for the rapid prediction of long-term deflections in simply supported steel–concrete composite bridges under the service load. The proposed expression incorporates the flexibility of shear connectors, shear lag effect and time effects (creep and shrinkage) in concrete. The expression has been derived from the trained artificial neural network (ANN). The
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Finite Element Modeling of Cold Curved Steel Rolled Beams Under Service Loads Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-23 Najib G. Saliba, Dola F. Nehmeh, Antoine H. Helal, Antoine N. Gergess
Cold bending is an efficient method recommended by steel fabricators for curving structural steel beams. It relies solely on mechanical forces to curve the beam into the required shapes without heating. While extensive research has been conducted on fabrication processes, data on the structural performance of cold bent steel girders in service is scarce which limits its use specifically in bridge structure
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Lateral Stability Analysis for Composite Plate Girder Bridges Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-23 Pavlos Thanopoulos, Stella Louverdi, Andreas Spiliopoulos, Ioannis Vayas
The methods that are currently available in the Eurocodes for the design of bridge plate girders to lateral torsional buckling are outlined and discussed. The inapplicability of the classic elastic critical moment theory for deep girders, which are common in bridge practice, is demonstrated. The simplified method of the equivalent flange in compression is applied instead, and its results are compared
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Numerical Investigation on Shear Deflection of Steel Welded I Sections with Varying Span to Depth Ratios Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-21 Salman Kamali, Harry Far
Deflection of the steel I-sections is an important phenomenon that needs to be taken into account to ensure that the serviceability limit state criteria of the Australian Standards are met. The method that is widely used to calculate the deflection of steel I-sections is by the use of existing formulae that only accommodate the bending stiffness of the beams. A numerical investigation is performed
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Experimental and Numerical Investigation of Stress Concentration at Rib-to-Crossbeam Joint Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-20 Heng Fang, Nouman Iqbal, Gilles Van Staen, Hans De Backer
In orthotropic steel decks (OSDs), the rib-to-crossbeam joint is the most vulnerable detail that has not been drawn enough attention. The failure mode of cracks initiate from the lower weld end on rib wall is governing its fatigue performance. However, relevant detail categories are still missing in prevailing codes. This paper mainly focuses on the stress concentrations at the rib-to-crossbeam joint
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Finite Element Modeling of Steel-concrete Composite Beams with Different Shear Connection Degrees Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-20 Xing Zheng, Wenxian Li, Qiao Huang, Bing Wang
In order to study the behavior of Steel-concrete composite beams with different shear connection degrees, using finite element software ABAQUS, four models with different numbers of headed studs are established, all of which apply appropriate concrete and steel constitutive models, and contact relationship. The accuracy of finite element models is verified by comparing the simulation results with corresponding
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Numerical Study to Evaluate the Effect of Ductile Element in the Seismic Performance of Steel Frames with EBF Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-19 S. Reza Salimbahrami, M. Naghipour
This paper presents the results of a numerical study, using ANSYS and OpenSees, of Ductile Element in the Seismic Performance of Steel Frames with eccentrically braced frame. This ductile element as dissipater includes a ring with a box around it that increases the ductility and energy dissipation of structures during an earthquake strike. It can be installed in every brace frame. Furthermore, during
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Failure Analysis of a Cruciform-Leg Transmission Line Tower Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-15 Veerendra Kumar Shukla, Munusamy Selvaraj, Kalla Vijaya Kumar
Design of latticed steel power transmission towers is a challenging task, which involves lengthy modeling and detailing of significant amount of steel members and connections. The tower is analyzed and designed as a space truss and various members of tower are checked for Tension, Compression and Slenderness Ratio. Sometimes, due to unavailability of required sections or economical point of view, single
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New Elastoplastic Analysis of Two-Dimensional Frames When Some Plastic Hinges Unload Elastically Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-09 Fethullah Uslu, Mehmet Tevfik Bayer, Mustafa Haluk Saraçoğlu
Two-dimensional frames are made of elastic and perfectly plastic materials. Frames are analized by using the step by step elastoplastic analysis method where the applied loads are gradually increased at each step until a plastic hinge is developed. Then an equivalent frame model is generated by placing a mechanical hinge at the location of the plastic hinge and the increased external loads and the
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Design of Prestressed W-Shape Beams with a Separated Prestressing Cover Plate Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-07 Kee Dong Kim, Hyo Il Ahn, Ki Jang Han, Dong Seong Kim
Prestressed steel beams with a prestressing cover plate (PBCP), which are expected to overcome the limitations of prestressed steel girders using tendons, were investigated in this study. Experiments and finite element analyses (FEA) were performed to present a design procedure. The maximum compressive force according to flange slenderness, which could be applied to steel beams subjected to bending
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The Behavior of Welded Moment Connections in Box-Columns and Investigating Applied Demands for Different Cyclic Loading Protocols Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-06 M. Ghassemieh, M. Hassani Sokhtesaraei, S. R. Mirghaderi
The strength and deformation capacity of structural elements are influenced by their cumulative damages received through load cycles. Loading protocols would provide the estimation of the structural components’ capacities and a proper simulation of the seismic reality, which are used to assess the performance of connections. Given the widespread application of I-beam to box-column moment connections
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An Experimental Study on Bolt Looseness Monitoring Using Low-Cost Transfer Impedance Technique Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-06 Jong-Won Lee
A technique to detect the bolt looseness in steel frame using the transfer impedance technique, which is a dual piezoelectric material technique, for bolted joint structural health monitoring is experimentally studied. An expensive impedance analyzer should be used to employ the single piezoelectric material technique (SPMT) while a general function generator and a digital multimeter can be used to
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Cold-Formed Steel Lipped Channel Section Columns Undergoing Local-Overall Buckling Interaction Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-06 Krishanu Roy, Tina Chui Huon Ting, Hieng Ho Lau, Rehan Masood, Rayed Alyousef, Hisham Alabduljabbar, Abdulaziz Alaskar, Fahed Alrshoudi, James B. P. Lim
This paper presents an experimental and finite element (FE) investigation into the local-overall buckling interaction behaviour of axially loaded cold-formed steel (CFS) channel section columns. Current design guidelines from the American Iron and Steel Institute (AISI) and the Australian and New Zealand Standards (AS/NZS) recommend the use of a non-dimensional strength curve for determining the axial
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Linear and Nonlinear Behavior of Steel Buildings with Different Bracing Systems Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-03 Sulaiman Al-Safi, Ibrahim Alameri, Waleed Abdullah Wasel, Amjad Basheer Al-kadasi
In this study, the effects of wind and seismic loads on 5, 10, and 15 story steel buildings with different bracing systems were investigated. Linear static and nonlinear dynamic analyses were performed to assess the base shear, base moment, and story drift for all bracing systems. In addition, the cost analysis was taken into consideration. Five structural configurations were used: V-bracing, inverted
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Improved Ultra-Low Cycle Fatigue Fracture Models for Structural Steels Considering the Dependence of Cyclic Damage Degradation Parameters on Stress Triaxiality Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-03 Shuailing Li, Xu Xie, Qin Tian, Cheng Cheng, Zhicheng Zhang
The ultra-low cycle fatigue (ULCF) fracture initiation caused by cyclic large plastic strain in structural steels is often the governing limit state in steel structures when subjected to strong earthquake actions. Based on the author’s previous work, this paper presents the improved cyclic void growth model (CVGM) and degraded significant plastic strain (DSPS) model considering the dependence of cyclic
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Temperature Distribution and Mechanical Response of Orthotropic Steel Bridge Deck During Paving of Gussasphalt Pavement Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-03 Liang Fan, Weipeng Yang, Dan Zhou, Zhengyi Li
To investigate the temporal–spatial temperature field and mechanical response of an orthotropic steel bridge deck during paving with gussasphalt concrete (GAC), in situ monitoring of the Cuntan Yangtze River Bridge in China was conducted during GAC paving, and a finite element method model of the temperature field was established. The test and model show the following: (1) The maximum temperature occur
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Damaged Tubular T-joints Retrofitted with Carbon Fiber Reinforced Polymer Subjected to Monotonic and Cyclic Loadings Int. J. Steel Struct. (IF 0.878) Pub Date : 2021-01-02 Peng Deng, Jianxun Guo, Yan Liu, Boyi Yang
Owing to seismic, wave, or wind actions, tubular joints used in onshore and offshore civil infrastructures may require retrofitting to withstand both static and cyclic loadings. In the present study, bearing capacities, failure modes, and ductilities of damaged tubular T-joints retrofitted with carbon fiber reinforced polymer (CFRP) were investigated. Two-step loading was applied: first, a pre-determined
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Analysis of Stressed Skin Behaviour of a Steel Façade Frame Under Varying Structural Conditions Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-19 Todor Vacev, Andrija Zorić, Slobodan Ranković, Miloš Milić, Stepa Paunović, Ivan Nešović
Steel structures are traditionally designed neglecting the in-plane bearing capacity of the cladding. However, the cladding can act in coordination with the main structure, behaving as a diaphragm and contributing to its spatial stability, enabling the so-called stressed skin concept design. The subject of this paper was an analysis of behaviour of a sample steel frame cladded with corrugated sheet
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Interaction of Buckling Modes for Cellular Steel Beams Under Flexure Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-19 Rujuta A. Bhat, Laxmikant M. Gupta
Steel beams with web openings are extensively used in commercial structures because of their advantages in saving headroom and for providing a passage for utilities like air ducts, water pipes, etc. Design guidelines for such beams are provided by the EuroCode3 and by AISC design guide. The Indian Standard does not provide the design guides and thus an attempt has been made in this paper to utilize
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Experimental and Numerical Studies on Dynamic Characteristics of Long-Span Cable-Supported Pipe Systems Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-13 Marvin Paul Agwoko, Zhihua Chen, Hongbo Liu
Cable-supported pipe structure (CSPS) is a system of structure which has improved capacity over conventional elevated pipe structure, in terms of the capacity of span but with limited application owing to insufficient vibration characteristics and performance evidence. The study focuses on experimental modal and updating of the 64.8 m CSPS model to improve the dynamic behavior of the CSPS structure
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Strength Evaluation of Angle Type Shear Connectors in Composite Beams Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-09 Jun-Seop Lee, Kyung-Jae Shin, Hee-Du Lee, Jong-Hun Woo
Composite structures are used in structural systems to take advantage of concrete and steel, and the role of shear connectors between the two is extremely important. Currently, anchor- and angle-type connectors are mainly used as shear connectors, and the angle type offers several advantages over the anchor type. The angle type can be manufactured as a shape that fits the composite structure with a
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Local and Distortional Interaction Buckling of Cold-formed Thin-Walled High Strength Lipped Channel Columns Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-09 Lihua Huang, Wenbin Yang, Tingwei Shi, Jiting Qu
In this paper, a series of axial compression tests were conducted on lipped channel columns constructed from cold-formed high strength Grade G550 steel sheet of thickness of 1 mm in order to investigate the local and distortional interaction buckling performance. The failure modes, ultimate loads and load–displacement curves of the specimens were reported and analyzed. The experiment revealed the deformation
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Evaluating Local Buckling Strength of HSB460 Steel Tubular Columns Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-09 Seong-Wook Han, Yeun Chul Park, Ho-Kyung Kim, Doobyong Bae
High performance steels for bridges (HSB), as adopted by the Korean Design Standard (KDS), having a yield strength greater than 350 MPa have recently been developed. Notably, HSB460, which has a minimum yield strength of 460 MPa, does not exhibit a yield plateau beyond yielding and exhibits strain hardening. Such characteristics could provide advantages by absorbing the greater strain energy of steel
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Seismic Response Control Performance Evaluation of Tuned Mass Dampers for a Retractable-Roof Spatial Structure Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-06 Young-Rak Lee, Hyun-Su Kim, Joo-Won Kang
Choosing the installation location of a tuned mass damper (TMD) is the most important factor to consider when controlling dynamic response of a structure. It is also necessary to study whether the mass of the TMD installed on the structure effectively reduces the seismic response to the dynamic load. This study investigates the control performance of a seismic load was using a TMD installed on the
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Research on the Law of Stress Development Along Backfilling Process Between Crest and Valley of Buried Corrugated Steel Pipe Culverts Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-05 Baodong Liu, Haibo Sun, Weibo Xu, Yafei Shi, Beichen Zhang, Mengmeng Yao
Although buried corrugated steel pipe culverts have been studied intensively in the past decades, the stress development law between crest and valley during backfilling process is still not analyzed sufficiently, which is an important technical difficulty for the construction of this kind of structures. In this paper, a three-dimensional finite element model (FEM) is developed to simulate the behavior
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A Study on Live Load Deflection Criteria of Long-Span Steel Bridges Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-05 Ki-Jung Park, Do-Young Kim, Eui-Seung Hwang
Under-clearance of bridges is one of the major considerations when planning and designing bridges. Especially for sea-crossing bridges, under-clearance is more important for safe passage of ships. Long span cable bridges with steel orthotropic deck usually show relatively large deflections and excessive deflections may be not only disadvantageous to the clearance plan, but also a problem in bridge
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Reduction of Stress Concentration at Stop-Hole by Bolting a Crack Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-11-04 Toshiyuki Ishikawa, Shogo Kiyokawa, Wataru Nakatsuji
A stop-hole, which is drilling at the crack tip, is one of the famous tentative repairs of fatigue cracks in steel structures. When the crack becomes longer, the stress concentration of the stop-hole also increases. Therefore, during the tentative repair of long fatigue cracks, the chances for re-initiation of the fatigue cracks from the stop holes are high. The bolting stop-hole method is a useful
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Experimental Investigation into In-plane Stability of Concrete-Filled Steel Tubular Parabolic Arches Under Five-Point Concentrated Loads Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-31 Qing Hu, Changyong Liu, Changchun Yuan, Yuyin Wang, Sumei Zhang
This paper deals with experimental investigations into in-plane stability of fixed concrete-filled steel tubular (CFST) parabolic arches. Three CFST arches with the same span but different rise-to-span ratios were tested under five-point symmetrical concentrated loads over the full span. All applied loads were controlled in synchronization. The test results show that the test arches buckled in an antisymmetric
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Crushing Behavior of Hierarchical Hexagonal Thin-Walled Steel Tubes Under Oblique Impact Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-29 Weiwei Li, Hualin Fan
In this paper, oblique crushing behaviors of the hierarchical hexagonal steel tubes were investigated. In the oblique impact, the crushing mode transfers from axial crushing dominated mode to bending dominated mode with the increase of the impact angle. In normal impact, the hierarchical steel tubes have progressive folding and global folding, depending on the cell number and the thickness of the sandwich
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Bond Behavior in Flexural Members: Numerical Studies Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-28 Ankit Bhardwaj, Vasant Matsagar, A. K. Nagpal, Sandeep Chaudhary
Adhesive bonding has recently emerged as an alternative to shear stud connection in steel–concrete composite flexural members. Research on adhesive-bonded steel–concrete composite flexural members is in a preliminary stage, and the behavior of the bond layer in these structures is not well understood yet. A three-dimensional finite element model is developed and used to conduct the parametric investigations
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Experimental Study on Load Carrying Capacity Enhancement of System Supports Considering Full Installation of Bracing Members Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-26 Hyung Do Lee, Jeong-Hun Won, Nam-Gwon Jang, Ho-Seong Mha, Seong-choon Jeong, Seungjun Kim
This study investigated the ultimate load capacity of assembled system supports by comparing cases with and without bracing members. Supports used as temporary structures are essential to resist the concrete casting load. Current trends encourage the use of system supports to prevent the collapse of supports, which occur frequently. Studies regarding the ultimate behavior of system supports in Korea
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Lateral Torsional Buckling Strengths of Stepped Beams at Midspan Exposed to Elevated Temperature Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-24 Shane Alolod, Jongsup Park, Deokhee Won
The American Institute of Steel Construction provides design equations for the lateral torsional buckling (LTB) of beams under fire. However, these equations are limited only to prismatic beams. Stepped beam factors are introduced by researchers that accounts the change in cross-sections of beams to determine capacities of stepped beams under normal temperatures. This paper assesses the validity of
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Post-Fire Exposure Behavior of Circular Concrete-filled Steel Tube Column under Axial Loading Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-19 Aditya Kumar Tiwary, Ashok Kumar Gupta
Concrete-filled steel tube (CFST) columns are a composite member which mainly consists of steel tube infilled with concrete that are increasingly being used as load-carrying members these days. In construction industry, CFST columns are being preferred for the development of tall buildings and long-span bridges. This paper presents an experimental investigation on concrete-filled steel tube (CFST)
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Differences in the Acoustic Emission Characteristics of 345 MPa Normal-Strength Steel and 460 MPa High-Strength Steel Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-17 Yiting Yang, Yan Wang, Kehao Li
This study characterized 345 MPa normal-strength steel (NSS) and 460 MPa high-strength steel (HSS) with the acoustic emission (AE) technique. Pencil lead break (PLB) and tensile tests were performed, and the generated AE signals were recorded. The AE signals from the PLB tests were converted into the frequency and time-frequency domains via a fast Fourier transform (FFT) and wavelet transform. The
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Effects of Impact Loads on Local Dynamic Behavior of Orthotropic Steel Bridge Decks Int. J. Steel Struct. (IF 0.878) Pub Date : 2020-10-16 Niujing Ma, Ronghui Wang
To investigate the local dynamic behavior of orthotropic steel bridge decks under impact loads, this paper proposed a type of combined plate-beam element for analysis of trapezoidal stiffened plate and a type of 8-nodes solid-plate element for analysis of pavement. Besides, vehicle wheel loads are supposed to be triangular loads for convenience. Then, a model experiment was conducted to verify the