Journal of Constructional Steel Research最新文献_第8页

Research on shear stress of non-prismatic single-box-multi-cell composite box girders with CSWs

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-03-01 DOI: 10.1016/j.jcsr.2025.109474

Wei Ji , Yihang Huang , Wei Wang

{"title":"Research on shear stress of non-prismatic single-box-multi-cell composite box girders with CSWs","authors":"Wei Ji , Yihang Huang , Wei Wang","doi":"10.1016/j.jcsr.2025.109474","DOIUrl":"10.1016/j.jcsr.2025.109474","url":null,"abstract":"<div><div>Limited research has explored the influence mechanisms of internal forces and girder geometric properties on the distribution of shear stress (DSS) within the cross-section of non-prismatic single-box multi-cell composite box girders with corrugated steel webs (SBMC-CBGCSW). Therefore, the purpose of this study is to bridge this gap. According to the equilibrium of infinitesimal elements and reciprocity theorem of shear stress, an analytical formula was first derived for calculating shear stress within the cross-section of non-prismatic SBMC-CBGCSW. Then, the influence mechanisms of internal forces and girder geometric properties on the DSS were investigated. Based on these findings, the shearing bearing ratio (SBR) of the bottom flange (BF) was calculated, and two simplified shear stress calculation methods considering the Resal effect were proposed. Finally, the accuracy of derived formulas was validated against published experimental data and numerical results. Results show that: (1) the shear stress obtained from proposed formulas agreed well with experimental data and numerical results, with discrepancies generally within an acceptable range of approximately 5 %; (2) the DSS is influenced by the interaction of internal forces, the change rate of girder height, and the change rate of BF thickness; (3) the BF may experience the maximum shear stress under the combined action of negative moment, compressive axial force, and downward shear force, where the SBR may reach its peak value. This research advances the understanding of DSS of non-prismatic SBMC-CBGCSW and offers simplified methods for shear stress calculation, providing practical tools to improve the design of the non-prismatic SBMC-CBGCSW.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109474"},"PeriodicalIF":4.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure, tensile property and corrosion performance of GTAW 316 L/Q345 under compound-magnetic field

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-28 DOI: 10.1016/j.jcsr.2025.109468

Wei Zhou, Jianfeng Yue, Hao Zhou, Hexu Li

{"title":"Microstructure, tensile property and corrosion performance of GTAW 316 L/Q345 under compound-magnetic field","authors":"Wei Zhou, Jianfeng Yue, Hao Zhou, Hexu Li","doi":"10.1016/j.jcsr.2025.109468","DOIUrl":"10.1016/j.jcsr.2025.109468","url":null,"abstract":"<div><div>In order to investigate the regulation law of compound-magnetic field on the weld quality of dissimilar steels with significant material property differences. This study applied compound-magnetic field to gas tungsten arc welding (GTAW) 316 L/Q345 dissimilar steel welding. The compound-magnetic field is generated by longitudinal excitation current (<em>I</em><sub><em>L</em></sub>) and cusp excitation current (<em>I</em><sub><em>C</em></sub>) in the excitation coil. The forming, microstructural evolution, tensile property and corrosion performance of weld metal (WM) under different excitation parameters were studied by Leica microscope, electron backscatter diffraction (EBSD), electronic general test equipment, electrochemical measurement, scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). Study results show that:compared with No external magnetic field (EMF), under the influence of compound-magnetic field, the weld formation was significantly improved. The base metals fusion ratio were similar and the penetration was maximum when <em>I</em><sub><em>L</em></sub> = 0.5 A & <em>I</em><sub><em>C</em></sub> = 5 A; The microstructure changed from martensite to martensite + residual austenite, and the grains are significantly refined; The tensile fracture mode changed from brittle fracture to mixed fracture; The best tensile properties were obtained at <em>I</em><sub><em>L</em></sub> = 0.5 A & <em>I</em><sub><em>C</em></sub> = 3 A, with the ultimate tensile strength (UTS) and elongation (EL) being 1073.27 MPa and 6.86 %, respectively, which were 39.9 % and 68.6 % higher than those of No EMF; The residual austenite, high content of Cr and Ni elements and grain refinement in WM significantly improved the density of rust layer. WM had the best corrosion resistance when <em>I</em><sub><em>L</em></sub> = 0.5 A & <em>I</em><sub><em>C</em></sub> = 3 A.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109468"},"PeriodicalIF":4.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Equivalent loading protocols for steel plate shear wall considering seismic action characteristics 考虑地震作用特性的钢板剪力墙等效加载规程

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-28 DOI: 10.1016/j.jcsr.2025.109442

Meng Wang , Haixin Duan , Gang Shi

{"title":"Equivalent loading protocols for steel plate shear wall considering seismic action characteristics","authors":"Meng Wang , Haixin Duan , Gang Shi","doi":"10.1016/j.jcsr.2025.109442","DOIUrl":"10.1016/j.jcsr.2025.109442","url":null,"abstract":"<div><div>Determining the loading protocol in the quasi-static tests of the steel plate shear wall (SPSW) plays an important role in evaluating the seismic performance, which should effectively reflect the real responses of SPSW subjected to the action of earthquakes. Therefore, equivalent loading protocols for SPSW are developed, which can consider both far-field and near-fault seismic action characteristics. Firstly, the prototype structure systems of SPSW are designed, and the ground motions are selected for nonlinear time-history analysis through OpenSees. Then, the load parameters of the critical story are counted based on the rain-flow counting method. Finally, the rationality of the proposed loading protocols is validated by comparing them with the results of time-history analysis. The performance of SPSW under the proposed and existing loading protocols is also compared. The results show that the proposed far-field loading protocol covers a more comprehensive range of inter-story drift angles (ISDA), which is conducive to evaluating the performance of SPSW with better ductility. The proposed near-fault loading protocols consider different seismic intensities and have better applicability. Both the proposed far-field and near-fault loading protocols can well capture the cyclic distributions of damage in the range of different ISDAs, and can represent the actual seismic action to test the seismic performance of SPSW. There is little difference in the performance of SPSWs under the proposed far-field and existing far-field loading protocols. The proposed near-fault loading protocol compensates for the lack of consideration of near-fault ground motion characteristics in the existing loading protocols.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109442"},"PeriodicalIF":4.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-centering devices with damage-free, high energy-dissipation and variable stiffness characterization during earthquakes

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-28 DOI: 10.1016/j.jcsr.2025.109456

Xin Li , Hui Jiang , Liangjiang Chen , Junjun Guo , Yongzheng Zhou , Wenliang Lu

{"title":"Self-centering devices with damage-free, high energy-dissipation and variable stiffness characterization during earthquakes","authors":"Xin Li , Hui Jiang , Liangjiang Chen , Junjun Guo , Yongzheng Zhou , Wenliang Lu","doi":"10.1016/j.jcsr.2025.109456","DOIUrl":"10.1016/j.jcsr.2025.109456","url":null,"abstract":"<div><div>Over the last few years, significant progress has been made in innovative low-damage structures excited by strong earthquakes, thanks to the development of self-centering energy-dissipation devices (SCEDs). However, SCEDs still face several challenges: they require high prestressing forces or complex configuration, they have constant post-yield stiffness, which makes them difficult to achieve a reasonable balance between internal forces and displacement, and they have insufficient recoverability, such as energy-dissipation components have to be replaced after an earthquake. This study presents a novel SCED with springs, lead extrusion dampers, and a deformation-amplified system (SL-SCEDs) to address these inadequacies. The device is characterized by low damage, variable stiffness, high energy dissipation, and low prestressing force. The concept and working mechanism were illustrated. An analytical model was developed to quantify the hysteretic behavior. A numerical parametric study was subsequently conducted. To evaluate the effectiveness of SL-SCEDs, time history analyses were carried out based on solid piers, spherical steel bearings, friction pendulum bearing combined with circular steel dampers, and conventional SCEDs were selected for comparison. The results show that SL-SCEDs can effectively reduce the maximum bearing displacement by 44 %, and the residual displacement of SL-SCEDs is almost negligible, which is the best performance among the four earthquake-resistant systems. Additionally, the maximum shearing force of the pier equipped with SL-SCEDs is lower than traditional SCEDs (2 % ∼ 5 %) and slightly higher than spherical steel bearings (1 % ∼ 10 %). The anticipated performance objectives of SL-SCEDs are realized, demonstrating a promising pathway toward resilient structures.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109456"},"PeriodicalIF":4.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of load-bearing capacity of sigma section CFS beam-column members using ensemble and deep learning algorithms

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-27 DOI: 10.1016/j.jcsr.2025.109458

Yılmaz Yılmaz , Ferhan Öztürk , Serhat Demir , Ayşegül Durmuş Demir

{"title":"Prediction of load-bearing capacity of sigma section CFS beam-column members using ensemble and deep learning algorithms","authors":"Yılmaz Yılmaz , Ferhan Öztürk , Serhat Demir , Ayşegül Durmuş Demir","doi":"10.1016/j.jcsr.2025.109458","DOIUrl":"10.1016/j.jcsr.2025.109458","url":null,"abstract":"<div><div>In this study, the bearing capacity of CFS sigma-section (S) beam-column members are predicted using three different ensemble learning (EL) algorithms and three deep learning (DL) algorithms. A validated detailed finite element model was created, and a comprehensive dataset was generated by performing 2552 finite element analyzes (FEAs) with different cross-sectional properties and loading conditions. The dataset was divided into train (80 %) and test (20 %) sets and hyperparameter optimization was performed on the train set using the GridSearchCV method. Then, analyses were performed on train and test sets. In addition, SHAP, ICE and PDP analyses were performed to determine the effect of input characteristics. The most accurate model for predicting the load-bearing capacity of the members is Extreme Gradient Boosting Regressor (XGR) with an R<sup>2</sup> value of 0.995. According to SHAP analysis identified major eccentricity and local buckling critical load factor as key influencing parameters. As a result of the study, the load-bearing capacity of S-section CFS members under axial force and uniaxialbiaxial bending were predicted with high accuracy. Finally, using the computational speed of the XGR model, the load bearing capacity of S-section CFS members under axial force and uniaxialbiaxial bending was estimated in less than one second with the help of a designed graphical user interface.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109458"},"PeriodicalIF":4.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seismic performance evaluation of steel frame structures using self-centering prefabricated beam-column joints with weakened flange cover plates

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-27 DOI: 10.1016/j.jcsr.2025.109331

Zi-Qin Jiang , Tong-Kuan Wang , Li-Ke Zhang , Wei Han , Ke Ke , Wen-Ying Zhang

{"title":"Seismic performance evaluation of steel frame structures using self-centering prefabricated beam-column joints with weakened flange cover plates","authors":"Zi-Qin Jiang , Tong-Kuan Wang , Li-Ke Zhang , Wei Han , Ke Ke , Wen-Ying Zhang","doi":"10.1016/j.jcsr.2025.109331","DOIUrl":"10.1016/j.jcsr.2025.109331","url":null,"abstract":"<div><div>This paper continues the study of a novel self-centering prefabricated steel beam-column joint with weakened flange cover plates (WFCP-SCSJ). The seismic performance and the collapse performance of steel frames with WFCP-SCSJs (WSSF) were evaluated through numerical simulations. A six-story steel moment resisting frame was designed, considering various configurations and joint arrangements. Numerical models were established in OpenSees, and seismic time-history analyses and incremental dynamic analyses (IDAs) were carried out. Fragility curves were derived to assess the collapse resistance of different structural systems from a probabilistic standpoint. The results show that steel frames with WFCP-SCSJs exhibits superior seismic performance and self-centering capability, which meets the requirements in the Building Seismic Design Codes. Arranging WFCP-SCSJs on the inner side of the structural plane and along the weak axis effectively reduces the structural displacement response. Conversely, arranging WFCP-SCSJs solely on the first story of the structure leads to an abrupt change in structural stiffness and an increase in the displacement response. The failure probability of WSSF under different limit states is significantly lower than that of rigid-connected steel frames (RSF), and the collapse margin ratio (CMR) of WSSF is higher than that of RSF, indicating an excellent anti-collapse capability of the WSSF.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109331"},"PeriodicalIF":4.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Buckling of circular cylindrical shells under external pressures - A critical review

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-26 DOI: 10.1016/j.jcsr.2025.109439

Abubakr E.S. Musa , Mohamad M.K. Al-Ainieh , Mohammed A. Al-Osta

{"title":"Buckling of circular cylindrical shells under external pressures - A critical review","authors":"Abubakr E.S. Musa , Mohamad M.K. Al-Ainieh , Mohammed A. Al-Osta","doi":"10.1016/j.jcsr.2025.109439","DOIUrl":"10.1016/j.jcsr.2025.109439","url":null,"abstract":"<div><div>Circular cylindrical shells are prone to buckling failure under different types of external pressure. These can include uniform lateral pressure, hydrostatic pressure (uniform lateral plus end pressure), and non-uniform wind pressure. The focus of this study is to thoroughly examine the available formulas for calculating the buckling pressure of circular cylindrical shells under these various types of external pressure and to assess their limitations. The study delves into a dozen of simplified formulas drawn from literature, discussing their derivations and comparing them with the exact solution of the problem to unveil their constraints. The study also investigates the correlations between uniform lateral and wind pressures, the effects of geometrical and material nonlinearities, and the impact of imperfections. The findings confirm that hydrostatic buckling pressure is consistently lower than lateral buckling pressure, and the conditions under which the difference between the two is negligible have been refined. It was found that the difference in buckling pressures is insignificant (less than 5 %) for length-to-radius ratios greater than 1.0. Additionally, two simplified formulas from the dozen compared were identified as particularly reliable, yielding accurate results across a wide range of shell geometries. The study further revealed that the discrepancy between theoretical and experimental buckling stresses increases as the length-to-radius ratio decreases, with the effect becoming particularly pronounced for short shells with length-to-radius ratios below 1.0. Finally, the study summarizes key aspects related to the stability of circular cylindrical shells, including imperfection sensitivity, lower bound estimates, and stiffener requirements.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109439"},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seismic response analysis of cable-stiffened latticed shells with buckling-restrained braces

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-26 DOI: 10.1016/j.jcsr.2025.109437

Pengcheng Li , Hao Li , Shushuang Song , Tianhao Zhang , Yuanhua Zhang , Gang Xiong , Zhiqiang Li

{"title":"Seismic response analysis of cable-stiffened latticed shells with buckling-restrained braces","authors":"Pengcheng Li , Hao Li , Shushuang Song , Tianhao Zhang , Yuanhua Zhang , Gang Xiong , Zhiqiang Li","doi":"10.1016/j.jcsr.2025.109437","DOIUrl":"10.1016/j.jcsr.2025.109437","url":null,"abstract":"<div><div>The dynamic response of large-span structures, such as cable-stiffened latticed shells, under seismic action is significant. This study introduces steel buckling-restrained braces (BRBs) into cable-stiffened latticed shell structures and uses small-scale shaking table experiments and finite element analysis to thoroughly investigate their impact on vibration damping performance. The accuracy of the numerical simulation methods in predicting the natural frequencies and dynamic responses of cable-stiffened latticed shells was validated by comparing the results of small-scale shaking table tests with finite element simulations. Based on the deformation characteristics of different natural modes of a cable-stiffened latticed shell, four innovative BRB arrangement methods were designed, and their vibration damping performances under three types of seismic waves were analysed. The results demonstrate that the method proposed in this study, which optimizes the BRB arrangement based on natural mode characteristics, can significantly control the displacement response of cable-stiffened latticed shell structures under seismic loads. The M2 arrangement exhibits an optimal damping effect under various seismic intensity conditions.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109437"},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calculation of weld toe stresses from global numerical models: An engineering-oriented approach 通过全局数值模型计算焊趾应力：面向工程的方法

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-26 DOI: 10.1016/j.jcsr.2025.109431

Alessandro Menghini

引用次数: 0

Eurocode-based design proposal for non-continuously stiffened steel panels subjected to uniform compression

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-02-26 DOI: 10.1016/j.jcsr.2025.109423

Immo Lukas, Ralph Timmers, Robert Lang

{"title":"Eurocode-based design proposal for non-continuously stiffened steel panels subjected to uniform compression","authors":"Immo Lukas, Ralph Timmers, Robert Lang","doi":"10.1016/j.jcsr.2025.109423","DOIUrl":"10.1016/j.jcsr.2025.109423","url":null,"abstract":"<div><div>The contribution presents a design proposal for non-continuously longitudinally stiffened steel panels subjected to uniform compression. In this approach, the longitudinal stiffeners end within the panel, leaving a gap before reaching the transverse stiffener or the end of the girder. Experimental tests are used to validate a numerical model, with which a numerical parametric study is developed using geometrically and materially nonlinear analyses with imperfections (GMINAs) to cover a variety of geometry parameters and imperfections forming the basis of the design proposal. The design procedure is based on the reduced stresses method from EN 1993-1-5 considering all failure mechanisms collectively. The underlying critical stresses are determined numerically, while all subsequent steps are analytically calculated. In parallel, the procedure addresses the problem of weld fractures at the stiffener ends employing numerically validated constructive requirements. The design proposal provides desirable results for small gaps relevant to construction practice. In conclusion, a reliability analysis was conducted following EN 1990 and discussed based on two scenarios.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109423"},"PeriodicalIF":4.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0