Journal of Constructional Steel Research最新文献_第10页

Study on factors affecting the resonance fracture location in e-type fastener clips 影响 e 型紧固件夹共振断裂位置的因素研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-03-02 DOI: 10.1016/j.jcsr.2025.109473

Meng Xie , Kai Wei , Qianhua Pu , Guodong Li , Ping Wang

{"title":"Study on factors affecting the resonance fracture location in e-type fastener clips","authors":"Meng Xie , Kai Wei , Qianhua Pu , Guodong Li , Ping Wang","doi":"10.1016/j.jcsr.2025.109473","DOIUrl":"10.1016/j.jcsr.2025.109473","url":null,"abstract":"<div><div>In this study, the natural frequencies and influencing factors of the e-type fastener clips were first analyzed through modal simulation and hammer impact test, and combined with the vibration frequency caused by rail corrugation, the modal resonance order was determined. Then, the stress field of the e-type fastener clips under inertial loads from each resonant mode was simulated, exploring the impact of the increasing proportion of inertial loads in different directions on fracture locations. Finally, a fatigue testing method employing equivalent preloading of resonant inertial loads was applied to reproduce fracture locations under various resonant modes. The results show that the friction coefficient between the clip's toe and the gauge block significantly impacts the 2nd-order natural frequency of the e-type fastener clips, which is associated with its modal lateral vibration. When the friction coefficient drops to about 0.1, on the distal side where the gauge block moves toward the iron plate support, this frequency of the e-type clips decreases by 363.2 Hz compared to conditions without trainload, causing simultaneous 1st-order and 2nd-order modal resonance. If the growth ratio of vertical inertial loads exceeds that of lateral loads, fractures occur at the arch heel; conversely, fractures occur at the front arch.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109473"},"PeriodicalIF":4.0,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527382","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

Optimization method of space grid structure considering the coupling effect of multiple loads, grid topology, and pole section

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-03-01 DOI: 10.1016/j.jcsr.2025.109463

Chang-jun Zhong , Zhi-wei Sun , Hao Chen , Shi-jun Huang , Ruo-qiang Feng , Jie-wei Lai , Jia-an Tian

{"title":"Optimization method of space grid structure considering the coupling effect of multiple loads, grid topology, and pole section","authors":"Chang-jun Zhong , Zhi-wei Sun , Hao Chen , Shi-jun Huang , Ruo-qiang Feng , Jie-wei Lai , Jia-an Tian","doi":"10.1016/j.jcsr.2025.109463","DOIUrl":"10.1016/j.jcsr.2025.109463","url":null,"abstract":"<div><div>Given the limitations of the traditional phased design method, this paper proposes an integrated selection and optimization method that considers both the grid topology and the pole section design. The proposed method can consider the influence of structural topology and pole dimensions and the influence of multiple working conditions and their combinations according to the specifications, ensuring that the optimized solution meets the actual engineering requirements. This paper presents the mathematical model, objective function, constraints, and program implementation process of the method. The method uses the minimum amount of steel to determine the optimal grid topology and pole section size. The proposed elite strategy genetic algorithm enables fast selection and global optimisation of structural solutions. The algorithm shows that the method proposed in this paper has high solution accuracy and efficiency, and the optimized grid topology solution uses significantly less steel, which fully illustrates the rationality of this method. The optimisation methodology and the optimisation program proposed in this paper can facilitate the rapid design of grid structures and reduce the cost-effectively.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109463"},"PeriodicalIF":4.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519444","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

Fatigue assessment of welded joints considering local geometry based on the zero-point effective notch stress method

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-03-01 DOI: 10.1016/j.jcsr.2025.109476

Caiyan Deng , Chenyu Luo , Yue Ma , Baoming Gong , Yong Liu , Zongxian Song

引用次数: 0

Design method of concrete-encased column connections for thin-walled CFST piers

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-03-01 DOI: 10.1016/j.jcsr.2025.109465

Fengmin Chen , Tianxiang Xu , Jiepeng Liu , Guikai Xiong

引用次数: 0

Fatigue analysis of suspenders on continuous suspension bridge with displacement-controlled device 带位移控制装置的连续悬索桥吊索的疲劳分析

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-03-01 DOI: 10.1016/j.jcsr.2025.109471

Zhijie Yuan , Hao Wang , Rou Li , Jianxiao Mao , Hai Zong

{"title":"Fatigue analysis of suspenders on continuous suspension bridge with displacement-controlled device","authors":"Zhijie Yuan , Hao Wang , Rou Li , Jianxiao Mao , Hai Zong","doi":"10.1016/j.jcsr.2025.109471","DOIUrl":"10.1016/j.jcsr.2025.109471","url":null,"abstract":"<div><div>Main cable displacement-controlled device (DCD) is the special component to ensure the safe operation of continuous suspension bridges and has been widely used in engineering recently. To study the safety of this new type of structure during service and its influence on the fatigue performance of suspenders, a fatigue analysis framework of the suspenders on continuous suspension bridge with DCD under traffic loads was proposed. A new vehicle-bridge interaction (VBI) analysis method that can take road roughness into account was proposed for dynamic calculations. The fatigue analysis of the suspender system was conducted on a typical three-span continuous suspension bridge with DCD and the influence of DCD on the fatigue performance was also studied. Results show that the proposed method can effectively carry out fatigue analysis. Both types of DCD are beneficial to improving the fatigue life of suspenders. According to the analysis results based on the linear elastic fracture mechanics method, the fatigue life of the suspender will be reduced by up to 83.8 % due to the absence of DCD. Rigid DCD is more effective in solving fatigue problems with a maximum increase in fatigue life of 4.99 times. It is necessary to install DCD on continuous suspension bridges. The choice of DCD type mainly depends on the topographic factors of the bridge site. Since the impact effect of the vehicle is much smaller than the gravity effect of the structure, road roughness is not the main factor affecting the fatigue life of suspenders.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"228 ","pages":"Article 109471"},"PeriodicalIF":4.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519448","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

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