Journal of Constructional Steel Research最新文献

Topology optimization of trusses considering global stability and member buckling

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-12-03 DOI: 10.1016/j.jcsr.2024.109205

Qi Cai , Jiaming Ma , Yi Min Xie , Yongchao Zhang , Yiyi Zhou

{"title":"Topology optimization of trusses considering global stability and member buckling","authors":"Qi Cai , Jiaming Ma , Yi Min Xie , Yongchao Zhang , Yiyi Zhou","doi":"10.1016/j.jcsr.2024.109205","DOIUrl":"10.1016/j.jcsr.2024.109205","url":null,"abstract":"<div><div>Ensuring stability in the practical application of optimized trusses is essential. Conventional optimization formulations use cross-sectional areas and axial force of members as design variables, but imposing member buckling constraints results in a concave feasible set, making the problem challenging to solve. Additionally, unstable nodes within continuous parallel compressive members complicate the determination of buckling strength. Here, we present an algorithm named evolutionary truss optimization (ETO) to address both global instability and member buckling issues. Initially, a convex semidefinite constraint is integrated into the optimization framework to ensure global stability and resolve challenges posed by unstable nodes, ensuring accurate buckling lengths of members. Subsequently, the concave optimization problem is transformed into a series of convex optimization problems by iteratively linearizing member buckling constraints, mitigating convergence issues. Optimization results from two numerical examples show that the proposed method ensures both the global stability and member stability. Its effectiveness is validated through comparisons with results from existing algorithms.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109205"},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759250","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

Robustness-based assessment and monitoring of steel truss railway bridges to prevent progressive collapse

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-12-03 DOI: 10.1016/j.jcsr.2024.109200

Maria Cristina Porcu , Manuel Buitrago , Pedro A. Calderón , Michele Garau , Mariano F. Cocco , Jose M. Adam

{"title":"Robustness-based assessment and monitoring of steel truss railway bridges to prevent progressive collapse","authors":"Maria Cristina Porcu , Manuel Buitrago , Pedro A. Calderón , Michele Garau , Mariano F. Cocco , Jose M. Adam","doi":"10.1016/j.jcsr.2024.109200","DOIUrl":"10.1016/j.jcsr.2024.109200","url":null,"abstract":"<div><div>Risks of bridge collapse were and continue to be real as evidenced by classical (e.g. Québec Bridge, Canada 1919; Seongsu Bridge, South Korea 1994) and recent (e.g. Skagit River Bridge, USA 2013; Francis Scott Key Bridge, USA 2024) episodes of catastrophic collapses. The causes of each collapse are diverse (e.g. natural disasters, changing conditions, design errors, intentional attacks). Still, the conclusions are always the same: deaths, injuries and large amounts of direct and indirect economic losses. In order to avoid these catastrophes, structural robustness and monitoring strategies can be used to analyse the bridge's vulnerability and anticipate any local-initial failure that can spread to the whole structure in the form of a progressive collapse. The objective of this work was to use an integrative threat-dependent and threat-independent approach to analyse the structural robustness of a never-before-studied U-shaped open cross-section steel truss railway bridge structure. Eight failure scenarios were considered and analysed through computational modelling. The extracted results make it possible: (i) to connect structural robustness analysis outputs with the definition of a new structural health monitoring strategy of the bridge; and (ii) to implement the conclusions in the real bridge with more than 100 sensors and a non-assisted alarm system for preventing progressive collapse.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109200"},"PeriodicalIF":4.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759251","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

Paradigm update in the design of long-span railway-crossing bridges

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-12-02 DOI: 10.1016/j.jcsr.2024.109206

F. Casciati, L. Faravelli

引用次数: 0

Multi-parameter coupling modeling method and hybrid mechanism of concrete-encased CFST hybrid structures

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-12-02 DOI: 10.1016/j.jcsr.2024.109204

Dan-Yang Ma, Shuai Ma, Chuan-Chuan Hou

{"title":"Multi-parameter coupling modeling method and hybrid mechanism of concrete-encased CFST hybrid structures","authors":"Dan-Yang Ma, Shuai Ma, Chuan-Chuan Hou","doi":"10.1016/j.jcsr.2024.109204","DOIUrl":"10.1016/j.jcsr.2024.109204","url":null,"abstract":"<div><div>Concrete-encased concrete-filled steel tubular (CFST) hybrid structures consist of encased CFST components and reinforced concrete (RC) encasement, posing unique challenges related to their hybrid mechanisms and coupling effects. This study addresses these issues by proposing an automatic and efficient Finite Element (FE) modeling method, which accounts for multiple constitutive models of confined concrete, meticulous grid division and reasonable interaction. The FE modeling method was packaged with a user-friendly graphical interface in the software ‘Auto CECFST’, which has been shared on GitHub(<span><span>https://github.com/CECFST/Auto-CECFST.git</span><svg><path></path></svg></span>). The modeling method has been verified by test results on the strength, stiffness and deformation capacity. Utilizing the refined FE modeling method, 7776 FE models are generated based on an orthogonal combination of 7 critical parameters of concrete-encased CFST hybrid structures. To accurately define failure modes, stress ratio (<em>φ</em>) was proposed to achieve quantitative analysis on the failure mode, followed by a comprehensive investigation into the full-range analysis of the hybrid mechanism of two components. Moreover, further exploration focused on multi-parameter coupling effects of critical mechanism characteristics, including strength, stiffness, and deformation capacity, elucidating the hybrid mechanism and mechanical similarities between single and multi-chord structures. Based on the above analysis, the balance of strength and deformation ability could be achieved by certain parameter ranges. Finally, available strength and stiffness calculation methods are validated against experimental and FE results under three typical failure modes, revealing the advantages and limitations of calculation methods on the basis of mechanics and data statistics, which provides a basis for security structural design.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109204"},"PeriodicalIF":4.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759249","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

The bond-slip behavior of H-shaped steel embedded in UHPC under reversed cyclic loading

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-12-02 DOI: 10.1016/j.jcsr.2024.109208

Bo Wang , Wei Huang , Xiaofan Li , Shiyu Tang , Zhi Zhou

{"title":"The bond-slip behavior of H-shaped steel embedded in UHPC under reversed cyclic loading","authors":"Bo Wang , Wei Huang , Xiaofan Li , Shiyu Tang , Zhi Zhou","doi":"10.1016/j.jcsr.2024.109208","DOIUrl":"10.1016/j.jcsr.2024.109208","url":null,"abstract":"<div><div>To investigate the bond-slip behavior of the interface between H-shaped steel and ultra-high performance concrete (UHPC) under reversed cyclic loading, 18 steel-UHPC and 6 steel-NC composite specimens were fabricated and subjected to both reversed cyclic and monotonic loading tests. Key parameters including concrete strength, steel fiber volume fraction, embedded length of the steel section, and loading scheme were examined. The results indicate that, under reversed cyclic loading, the bond strength of the steel-UHPC composites decreased by 7 %–15 %, while the residual bond strength decreased by 16 %–57 % compared to monotonic loading. For both loading schemes, bond strength slightly decreases with an increase in embedded length but can be significantly enhanced by increasing the steel fiber volume fraction, which also improves residual bond strength and energy dissipation under reversed cyclic loading. Additionally, bond strength increases with higher concrete strength. Finally, a damage index <em>D</em> derived from the bond stress-slip hysteresis curves was used to represent bond degradation under reversed cyclic loads, and a constitutive model to predict the bond-slip behavior of the steel-UHPC interface under reversed cyclic load was presented.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109208"},"PeriodicalIF":4.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759247","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

Elevated temperature material properties of cold-formed advanced high strength steel channel sections

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-12-02 DOI: 10.1016/j.jcsr.2024.109183

Hai-Ting Li , Chen-Yu Xu , Jia-Hui Zhang , Hongwei Li

{"title":"Elevated temperature material properties of cold-formed advanced high strength steel channel sections","authors":"Hai-Ting Li , Chen-Yu Xu , Jia-Hui Zhang , Hongwei Li","doi":"10.1016/j.jcsr.2024.109183","DOIUrl":"10.1016/j.jcsr.2024.109183","url":null,"abstract":"<div><div>Fire safety remains a paramount concern in the design and application of cold-formed structures, making the understanding of mechanical properties of advanced high strength steel (AHSS) at elevated temperatures essential. This paper presents a comprehensive experimental investigation into the mechanical properties of cold-formed AHSS channel sections and their virgin material at elevated temperatures. A total of 60 coupon specimens were extracted from the middle of web element, the corner-flat adjunction of web element, as well as the middle of flange element of the cold-formed AHSS channel sections. Moreover, 20 additional coupon specimens were extracted from the cold-rolled AHSS sheets, which is the virgin material. Elevated-temperature tensile coupon tests were carried out by using steady-state test method under 10 different temperatures up to 800 °C. Full range of stress-strain curves were obtained for the virgin material and three locations of the cold-formed AHSS channel sections. Key mechanical properties including elastic modulus, yield stress and ultimate strength were obtained. Differences in the mechanical properties of coupons with different thicknesses and from various cutting positions were investigated. The obtained reduction factors of the studied AHSS were compared with existing design rules, including European, American, and Australian specifications, as well as predictive models from related research work. New design curves were proposed to provide an accurate and conservative estimation of the reduction in mechanical properties at elevated temperatures, and constitutive stress-strain models were also proposed.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109183"},"PeriodicalIF":4.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759248","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

Variation in the cross-sectional geometry of hot-rolled I-sections: Measurements, statistics, probabilistic modelling

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-12-01 DOI: 10.1016/j.jcsr.2024.109185

Robin Steinmetz, Andreas Taras

{"title":"Variation in the cross-sectional geometry of hot-rolled I-sections: Measurements, statistics, probabilistic modelling","authors":"Robin Steinmetz, Andreas Taras","doi":"10.1016/j.jcsr.2024.109185","DOIUrl":"10.1016/j.jcsr.2024.109185","url":null,"abstract":"<div><div>This paper presents the evaluation of an extensive measurement campaign on the cross-sectional dimensions of hot-rolled I-sections. As a preliminary step, the reliability of the measuring process was quantified as well as checked to what extent the cross-sectional dimensions remain constant along a beam. In the main part of the investigation, a total of 561 statistically independent I-sections with a wide range of different sizes were surveyed and statistically analysed. Overall, the observed variation of the dimensions revealed a good agreement with the characterisation in the new Annex E of EN 1993-1-1. However, a more detailed evaluation showed that there is a certain dependence of these statistical parameters on the nominal size of the dimensions. Furthermore, several other aspects were checked, such as the correlation between the individual dimensions, the compliance with manufacturing tolerances according to EN 10034 and the uniformity of the web and flange thickness at various positions within the cross-section. Subsequently, the measured profiles were also analysed based on the resulting cross-sectional properties. In addition to a statistical evaluation in respect to the corresponding nominal values, the influence of the common shape idealisation to a perfectly double-symmetrical cross-section with constant flange thicknesses was addressed. Finally, a comparison of several options for the probabilistic modelling of the geometric variability was carried out, based on the lower 5%-quantiles of the resulting cross-sectional properties.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109185"},"PeriodicalIF":4.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757553","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

Steel‑aluminum clinched joints mechanical properties and strength prediction under different geometric parameters

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-30 DOI: 10.1016/j.jcsr.2024.109196

Yue Zhang , Changhui Liao , Tao Wang , Changyou Xu , Jianbiao Peng , Bei Lei , Jiachuan Jiang

{"title":"Steel‑aluminum clinched joints mechanical properties and strength prediction under different geometric parameters","authors":"Yue Zhang , Changhui Liao , Tao Wang , Changyou Xu , Jianbiao Peng , Bei Lei , Jiachuan Jiang","doi":"10.1016/j.jcsr.2024.109196","DOIUrl":"10.1016/j.jcsr.2024.109196","url":null,"abstract":"<div><div>With the evolution of modularization and prefabrication in construction, there is a growing adoption of prefabricated thin-wall steel and aluminum structures for lightweight buildings and interior decoration. Clinching emerges as a proficient method for achieving heterogeneous metal connections, offering benefits such as streamlined processes, reduced material usage, environmental friendliness, and potential for automation. This study focuses on high-strength steel DP590 and aluminum alloy AW5754-H22, exploring various process parameters (including punch diameter, punch fillet radius, extensible die diameter, and extensible die depth) tailored for clinching experiments on thin steel and aluminum plates. The research analyzes how these process parameters affect the geometric characteristics of the joints and investigates their mechanical properties through static shear tests. Findings indicate that interlocks exceeding 0.29 mm lead to neck cracks during the clinching process. Additionally, the energy absorption of the specimens in button separation exceeds that in neck fracture by 44 % under comparable maximum failure loads in static shear. Optimal process parameters identified are SR5605-SR60310, achieving a maximum failure load of 4.14kN and an energy absorption value of 12.37 J in static shear tests. Finally, a method is proposed to calculate the shear strength of steel‑aluminum clinched joints based on the transmission dynamics of infectious diseases model (SIR model), accounting for the influence of geometric parameters on the static performance of the joints. This approach accurately describes the load-displacement curve trend and predicts the static shear strength of steel‑aluminum clinched joints effectively.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109196"},"PeriodicalIF":4.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757613","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 of CFDST column to steel beam welded-bolted joint with slab

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-30 DOI: 10.1016/j.jcsr.2024.109192

Yu Wang, Dongfang Zhang, Junhai Zhao, Qiongfei Du, Huanhuan Chen

{"title":"Seismic performance of CFDST column to steel beam welded-bolted joint with slab","authors":"Yu Wang, Dongfang Zhang, Junhai Zhao, Qiongfei Du, Huanhuan Chen","doi":"10.1016/j.jcsr.2024.109192","DOIUrl":"10.1016/j.jcsr.2024.109192","url":null,"abstract":"<div><div>To study the impact of RC slab on the seismic performance of CFDST column to steel beam welded-bolted joint, two CFDST column to steel beam welded-bolted joints with RC slab and two without RC slab were designed and fabricated. Low-cycle reciprocating load tests were conducted to analyze the effects of different configurations and the failure modes, hysteresis curves, skeleton curves, ductility, energy dissipation capacity, beam-end strain of the joint. The results showed that the hysteresis curves of all joints were relatively full and exhibited no pinching phenomenon. All joints experienced ductile failure, with failure modes characterized by tensile fracture at the connection between the steel beam upper flange and the upper ring plate, tensile tearing at the transition sections of the upper ring plate, wavy plastic deformation of the upper flange under compression, or crushing of the RC slab. The RC slab effectively improved the moment capacity, ductility, and energy dissipation capacity of the specimens, and also delayed the stiffness and strength degradation. The moment capacity, ductility, initial stiffness, and energy dissipation capacity of the specimens were reduced by decreasing the number of bolts in the lower ring plate. The nonlinear finite element method (FEM) models of the composite joints were established using Abaqus, and the failure modes and moment capacity obtained from the models were in good agreement with the experimental results. Based on the validated FEM models, some design parameters of the joints were explored.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109192"},"PeriodicalIF":4.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757554","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

Steel-concrete-steel sandwich composite pylons for cable-stayed bridges: structural behaviour of cable anchorage

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2024-11-30 DOI: 10.1016/j.jcsr.2024.109202

Chenggong Wang , Haoran Cheng , Junjie Li , Zhao Xu , Changze Xu , Zhansheng Lin , Guangqiao Zhang , Guotao Yang

{"title":"Steel-concrete-steel sandwich composite pylons for cable-stayed bridges: structural behaviour of cable anchorage","authors":"Chenggong Wang , Haoran Cheng , Junjie Li , Zhao Xu , Changze Xu , Zhansheng Lin , Guangqiao Zhang , Guotao Yang","doi":"10.1016/j.jcsr.2024.109202","DOIUrl":"10.1016/j.jcsr.2024.109202","url":null,"abstract":"<div><div>The cable-stayed bridge pylon is an important load-bearing component in bridges, especially the anchorage zone, which requires both high stiffness and load-bearing capacity. The steel-concrete-steel (SCS) sandwich composite structures provide a new alternative structural form for bridge pylons with excellent strength, stiffness, and cost-effectiveness. Besides, the modular construction of SCS sandwich composite bridge pylons achieve higher construction efficiency than traditional concrete bridge pylons. A 1:2 scaled model test was designed according to the actual project to investigate the structural behaviour of SCS sandwich composite cable anchorage under cable loading. Firstly, the stress distributions and load-displacement curves of inner and outer steel plates, and concrete cracks in the pylon anchorage zone were analyzed. Further, a simplified frame model was adopted to analyze the stresses in the cable pylon anchorage, which demonstrated that the SCS sandwich composite structures can improve the structural performance of cable anchorage. In addition, based on the finite element model verified by experimental results, the effects of section steel ratio, load-bearing plate area, section reinforcement ratio, and concrete strength on the load-bearing capacity and stress distribution in the anchorage zone were investigated. The results show that within a certain range, increasing the reinforcement ratio and load-bearing plate area can significantly increase the load carrying capacity of the cable anchorage, while the effects of increasing the cross-section reinforcement ratio and concrete strength are insignificant. The results of this paper can provide guidance to engineers in the practical application of SCS sandwich composite pylons.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"226 ","pages":"Article 109202"},"PeriodicalIF":4.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757615","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