Journal of Constructional Steel Research最新文献

Experimental analysis of crack propagation in stiffened box girders under variable-amplitude loading 变幅荷载作用下加劲箱梁裂纹扩展试验分析

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-28 DOI: 10.1016/j.jcsr.2025.109812

Ligang Shen, Somayeh Shojaeikhah, Mohamed Soliman

{"title":"Experimental analysis of crack propagation in stiffened box girders under variable-amplitude loading","authors":"Ligang Shen, Somayeh Shojaeikhah, Mohamed Soliman","doi":"10.1016/j.jcsr.2025.109812","DOIUrl":"10.1016/j.jcsr.2025.109812","url":null,"abstract":"<div><div>Welded stiffened panels are integral components of large-scale structures such as naval vessels and bridges. Load fluctuations at various weld locations can cause crack initiation and propagation. These fatigue cracks could propagate up to a critical size leading to catastrophic structural failure. Although these structures are generally subjected to random variable-amplitude loading, most studies in literature have investigated crack propagation in stiffened panels under constant-amplitude loading. A comprehensive research program was launched in Oklahoma State University to investigate the fatigue crack growth (FCG) in stiffened structure under variable-amplitude marine loading. This program involved experimental analysis on middle-tension specimens tested under constant- and variable-amplitude loading. Additionally, an experimental fatigue test was conducted on a large-scale stiffened box girder specimen under variable-amplitude marine loading to validate crack propagation prediction approaches. This paper presents the details of the experimental investigation on both the small- and large-scale specimens and discusses the results. It presents detailed dimensions of test specimens, test protocols, load generation procedures, test observations, and crack growth profiles.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109812"},"PeriodicalIF":4.0,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714041","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

Ultimate bearing capacity of X80 pipelines with incomplete penetration defects 不完全侵彻缺陷X80管道极限承载力

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-28 DOI: 10.1016/j.jcsr.2025.109830

Bin Jia , Youcai Xiang , Hongbing Zhang , Xinghong Zou , Li Zhu , Haiyin Xiong

{"title":"Ultimate bearing capacity of X80 pipelines with incomplete penetration defects","authors":"Bin Jia , Youcai Xiang , Hongbing Zhang , Xinghong Zou , Li Zhu , Haiyin Xiong","doi":"10.1016/j.jcsr.2025.109830","DOIUrl":"10.1016/j.jcsr.2025.109830","url":null,"abstract":"<div><div>Incomplete penetration defects pose a significant threat to the safe operation of pipelines. Therefore, this study conducted numerical simulations to investigate the influence of incomplete penetration defects on the mechanical properties and ultimate load-bearing capacity of a 1422 mm diameter X80 pipeline, focusing on the strain distribution in defective pipelines and evaluating the ultimate capacity for pipelines with various defect characteristics. The results indicated that under internal pressure, the maximum strain occurred at the four corners of the defect, while the strain concentration shifted to the bottom of the defect when an additional bending moment was applied. Furthermore, it was found that the maximum strain increased with the depth and length of the defect, but decreased as the pipe wall thickness and defect width increased. Based on the three factors that had a more significant impact on pipeline strain—pipe diameter, defect depth, and defect width—a neural network model and a predictive equation were created to estimate the ultimate bearing capacity of pipelines with incomplete penetration defects. It has been verified that the predictions of both models exhibit a high degree of agreement with the simulation results, indicating that both models had provided accurate predictions for the pipeline's ultimate bearing capacity, which could be applied in experimental and practical engineering scenarios.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109830"},"PeriodicalIF":4.0,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714042","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

Full-range strain-dependent dynamic increase factor (DIF) model for Q355 steel Q355钢全范围应变相关动态增加因子（DIF）模型

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-26 DOI: 10.1016/j.jcsr.2025.109821

Shen Yan , Yeyun Wei , Xianzhong Zhao

{"title":"Full-range strain-dependent dynamic increase factor (DIF) model for Q355 steel","authors":"Shen Yan , Yeyun Wei , Xianzhong Zhao","doi":"10.1016/j.jcsr.2025.109821","DOIUrl":"10.1016/j.jcsr.2025.109821","url":null,"abstract":"<div><div>Structural materials experience high strain rates when subjected to high-speed impact and explosion, and their constitutive behaviour changes significantly due to strain rate effect. This effect has already been found to be dependent on strain, e.g., the dynamic increase factor (DIF) on yield stress is typically higher than that on tensile strength. However, systematic investigations on the dependence of strain rate effect on strain are inadequate, and the underlying microscopic mechanisms are still unclear. In this study, a series of Q355 tensile coupons was designed and tested, with the coupon dimensions and loading schemes specifically designed to achieve five near-constant true strain rates (ranging 0.001 s<sup>‐1</sup>– 4460 s<sup>‐1</sup>). True stress-strain relationships corresponding to all strain rates were determined and full-range DIF curves were then obtained. Significant strain rate-induced strengthening effect was observed, and the effect became less prominent with the increase in strain. Based on the experimental findings, a new full-range strain-dependent DIF model was accordingly proposed. The proposed model exhibits consistently high performance in predicting the full-range dynamic response of various structural metals under different strain rates, achieving a 24 % ∼ 62 % increase in predictive accuracy compared to traditional models (e.g. the C-S and J-C models). Microstructural characterizations were conducted on three post-test coupons subjected to different strain rates, and on each coupon, four locations corresponding to distinct strains were examined. Combinative influences of dislocation multiplication, grain refinement and crystal orientation evolution well elaborate the macroscopic dependence of strain rate effect on strain.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109821"},"PeriodicalIF":4.0,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704583","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 steel tube confined steel reinforced concrete frame with replaceable buckling restrained braces 可更换屈曲约束支撑钢管承压钢筋混凝土框架的抗震性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-26 DOI: 10.1016/j.jcsr.2025.109823

Wanqian Nie , Guozhong Cheng , Xuesong Shi , Yuanlong Yang , Huyue Zhang , Yohchia Frank Chen

{"title":"Seismic performance of steel tube confined steel reinforced concrete frame with replaceable buckling restrained braces","authors":"Wanqian Nie , Guozhong Cheng , Xuesong Shi , Yuanlong Yang , Huyue Zhang , Yohchia Frank Chen","doi":"10.1016/j.jcsr.2025.109823","DOIUrl":"10.1016/j.jcsr.2025.109823","url":null,"abstract":"<div><div>To develop high-performance, repairable steel-concrete composite structural systems, this study proposes a highly efficient seismic-resistant, post-earthquake repairable, and highly industrialized circular steel tube confined steel reinforced concrete(STCSRC) frame structure with replaceable buckling-restrained braces(BRBs). Experimental research was conducted to investigate the seismic performance of this structure. The study clarifies the yield path and plastic energy dissipation mechanism, and evaluates the replaceability of BRBs, as well as the structural seismic performance before and after BRB replacement. The test results demonstrate that incorporating BRBs significantly enhances the lateral stiffness, load-bearing capacity, ductility, and energy dissipation capacity of the STCSRC frame. The structural yield sequence follows the order of BRB-beam-column. The BRB effectively protects the main structure, and replacing it restores the seismic performance of the structure. The BRBs, connected to the frame beam ends by pin connections, facilitate quick replacement after earthquakes, effectively enhancing the seismic resilience of the STCSRC frame.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109823"},"PeriodicalIF":4.0,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704582","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 friction energy dissipation brace with non-prestressed Disc Springs: Concept validation 无预应力碟形弹簧的自定心摩擦耗能支撑：概念验证

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-26 DOI: 10.1016/j.jcsr.2025.109827

Junkai Lu , Wenpeng Li , Junxian Zhao , Zhiqiang Li , Weichuang Liu

{"title":"Self-centering friction energy dissipation brace with non-prestressed Disc Springs: Concept validation","authors":"Junkai Lu , Wenpeng Li , Junxian Zhao , Zhiqiang Li , Weichuang Liu","doi":"10.1016/j.jcsr.2025.109827","DOIUrl":"10.1016/j.jcsr.2025.109827","url":null,"abstract":"<div><div>Self-centering energy dissipation braces (SCBs) provide both recovery and energy dissipation capacities during earthquakes. However, the deformation capacity of conventional SCBs is often constrained by the high-level prestress required in elastic self-centering components, limiting their hysteretic performance under severe earthquakes. To address this issue, this study introduces a novel self-centering brace with non-prestressed disc springs (NP-SCB). The configuration, working mechanism, and theoretical restoring force model of the NP-SCB are presented. In order to validate the concept, finite element analyses were then performed to evaluate the effects of key parameters, including sliding friction force (<em>F</em><sub>s</sub>) and disc spring stiffness (<em>K</em><sub>d</sub>), on its hysteretic performance, self-centering behavior, and energy dissipation capacity. The results revealed that the proposed restoring force model accurately predicted the hysteretic response of NP-SCBs, characterized by distinct “flag-shaped” and “spike-shaped” curves. The energy dissipation capacity was closely associated with the reactivation displacement and can be enhanced by reducing <em>F</em><sub>s</sub> or increasing <em>K</em><sub>d</sub>. The NP-SCB exhibited excellent self-centering performance, with a maximum residual axial strain of only 0.046 %. Compared to traditional pre-stressed SCBs, NP-SCBs showed a 9.86 % to 500 % improvement in deformation capacity. NP-SCB's seismic resilience can be enhanced by optimizing sliding friction force and disc spring stiffness.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109827"},"PeriodicalIF":4.0,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704584","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

Structural behaviours of WAAM 316L stainless steel bolted connections under tensile loading 拉伸载荷作用下WAAM 316L不锈钢螺栓连接的结构性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-25 DOI: 10.1016/j.jcsr.2025.109817

Yang Zhao , Chenyu Guo , Jun Ye , Zhen Wang , Yunyi Liu , Boshan Chen , Junting Cheng

{"title":"Structural behaviours of WAAM 316L stainless steel bolted connections under tensile loading","authors":"Yang Zhao , Chenyu Guo , Jun Ye , Zhen Wang , Yunyi Liu , Boshan Chen , Junting Cheng","doi":"10.1016/j.jcsr.2025.109817","DOIUrl":"10.1016/j.jcsr.2025.109817","url":null,"abstract":"<div><div>In this study, the structural behaviours of wire and arc additive manufacturing (WAAM) stainless steel bolted connections were investigated. A total of 64 WAAM 316L stainless steel bolted connection specimens with a nominal thickness of 7 mm and 3 mm were examined under axial tensile loads. The geometric dimensions of the specimens were measured using the 3D laser scanning technology, while the entire deformation process of the specimens during the tests was recorded using the digital image correlation (DIC) technology. The influences of key parameters, including the end distance, edge distance, bolt diameter, and WAAM printing direction, on the ultimate capacities and failure modes of the specimens were analyzed in this study. To evaluate the accuracy of the existing design standards, the obtained experimental results were compared against the predicted values by the existing design codes including Chinese code (CECS 410–2015), American code (AISC 370–21), European code (EN 1993-1-8) and American code (AISI S100–16). The comparison results indicated that the average ratio between the experimental results and the design strength predicted by the design codes ranges from 1.00 to 1.20. Among these, the average ratio for AISC 370–21 is relatively accurate. Additionally, the current CECS 410–2015, AISC 370–21, EN 1993-1-8, and AISI S100–16 are all unable to accurately predict the failure mode of bolted connections, with prediction accuracy rates ranging from 37.5 % to 65.6 %. Enhancing the design methods for WAAM-fabricated stainless steel bolted connections remains an essential area for further development.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109817"},"PeriodicalIF":4.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702540","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

Cyclic behavior of composite beam–steel column joints with peripheral laminated slabs 周边叠合板组合梁-钢柱节点的循环性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-25 DOI: 10.1016/j.jcsr.2025.109815

Yingjie Shan , Jie Li , Yongzhi Gong , Siping Lu , Jiajing Bi , Mingming Li

{"title":"Cyclic behavior of composite beam–steel column joints with peripheral laminated slabs","authors":"Yingjie Shan , Jie Li , Yongzhi Gong , Siping Lu , Jiajing Bi , Mingming Li","doi":"10.1016/j.jcsr.2025.109815","DOIUrl":"10.1016/j.jcsr.2025.109815","url":null,"abstract":"<div><div>This study introduces a novel laminated flooring system featuring narrow wet joints for frame connectivity, which significantly improves the assembly efficiency. Cyclic loading tests on four composite joint specimens were conducted to systematically evaluate the effects of width and material type of wet joints on the seismic performance. The results revealed that the specimens with C35 wet joints exhibited comparable seismic behavior to that with cast-in-situ slabs, with less than 5 % deviation in energy dissipation, load-bearing capacity, and stiffness degradation, attributed to similar crack propagation and consistent failure modes (concrete crushing around columns). Besides, the mechanical performance of composite joints was insensitive to the width of wet joints. The low damage characteristic of ultra-high-performance concrete (UHPC) wet joints reduced the energy dissipation capacity of the composite joint by about 16 %, but the well-maintained interaction between UHPC and columns significantly improved the secant stiffness by over 40 % and load-bearing capacity by 29.20 % at peak state. Moreover, strain-based analysis quantified the development of effective flange width at composite beam ends, and the calculated load-bearing capacity highlighted the tensile contribution of UHPC. Finally, the refined finite element model revealed the effect of experimental parameters on the deformation characteristics of five critical components governing the overall deformation of composite joints. The proposed system provides an innovative solution for industrialized development of prefabricated floor systems while offering new perspectives for enhancing seismic performance of composite joints through UHPC applications.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109815"},"PeriodicalIF":4.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702581","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 the seismic performance of modular buckling-restrained slotted steel plate shear wall 模块化抗屈曲开缝钢板剪力墙抗震性能研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-25 DOI: 10.1016/j.jcsr.2025.109826

Shuangshuang Jin , Shengchao Yang

{"title":"Research on the seismic performance of modular buckling-restrained slotted steel plate shear wall","authors":"Shuangshuang Jin , Shengchao Yang","doi":"10.1016/j.jcsr.2025.109826","DOIUrl":"10.1016/j.jcsr.2025.109826","url":null,"abstract":"<div><div>This paper introduces a novel type of modular buckling-restrained slotted steel plate shear wall (MS-SPSW), comprising modular steel plates with inclined slots, transverse and longitudinal skeleton frames, concrete panels, frame beams, and frame columns. This design addresses challenges related to the large size of steel plates, their difficult processing, and transportation, thereby facilitating standardized production of shear wall components. The inclined slots on adjacent modular steel plates are symmetrically arranged, ensuring the MS-SPSW exhibits highly symmetrical hysteretic behavior. To investigate the seismic performance of the MS-SPSW, a 1:3 scale specimen was fabricated and tested under quasi-static cyclic loading. The results show that the novel MS-SPSW underwent a total of 28 loading cycles, reaching a maximum lateral displacement of 54.0 mm (6.0 % drift ratio). The numerical model was developed and validated against the test results. Parametric studies investigated the effects of T&L skeleton frames, slot width, strip spacing, and steel plate thickness. Finally, a theoretical derivation of the ultimate load-bearing capacity formula for the MS-SPSW was presented.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109826"},"PeriodicalIF":4.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702582","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

Experimental and numerical investigation on axial compressive behavior of HP-FSST columns HP-FSST柱轴压性能试验与数值研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-25 DOI: 10.1016/j.jcsr.2025.109818

Tiansong Ye , Bo Yuan , Yong Zheng , Xingyue Luo , Yulong Zhang , Yuhong Li

{"title":"Experimental and numerical investigation on axial compressive behavior of HP-FSST columns","authors":"Tiansong Ye , Bo Yuan , Yong Zheng , Xingyue Luo , Yulong Zhang , Yuhong Li","doi":"10.1016/j.jcsr.2025.109818","DOIUrl":"10.1016/j.jcsr.2025.109818","url":null,"abstract":"<div><div>To promote sustainable utilization of phosphogypsum (PG) solid waste, this study proposes a novel high-strength PG-filled circular stainless steel tubular column (HP-FSST). A comprehensive experimental and numerical investigation was conducted, including axial compression tests performed on three hollow circular stainless steel (CHS) tubes and nine HP-FSST specimens with varying levels of PG compressive strength (<em>f</em><sub><em>c</em></sub>) and steel tube wall thicknesses (<em>t</em>). Corresponding finite element (FE) models were developed and validated using ABAQUS, enabling parametric analysis of size effects.The results indicate that HP-FSST columns exhibit favorable composite action, with the PG infill effectively restraining local buckling of the steel tube. Failure modes closely resemble those of traditional concrete-filled steel tube (CFST) columns, primarily characterized by bulging and diagonal shear. The strength index (<em>SI</em>) ranged from 1.45 to 1.70, and the PG contribution ratio (<em>PCR</em>) from 2.09 to 7.61. However, the ductility was lower than that of CFST columns, with residual-to-peak load ratio (<em>RR</em>) between 0.6 and 0.9.The FE analysis demonstrated notable size effects on peak axial stress, while peak strain and the composite elastic modulus were less sensitive. Based on GB 50936–2014 and EN 1994-1-1, modified design equations incorporating size-effect correction factors were proposed, achieving high prediction accuracy (mean values of 1.00 and 0.99; standard deviations of 0.033 and 0.028). This study presents a promising approach for PG waste utilization and provides a theoretical basis for the engineering design of HP-FSST columns.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109818"},"PeriodicalIF":4.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702476","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

Numerical investigation of cold-formed stainless steel elliptical hollow sections subjected to bending 冷弯不锈钢椭圆空心截面弯曲的数值研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-23 DOI: 10.1016/j.jcsr.2025.109798

Ye Yao , Huan Liang , Wai-Meng Quach , Meng Chen

{"title":"Numerical investigation of cold-formed stainless steel elliptical hollow sections subjected to bending","authors":"Ye Yao , Huan Liang , Wai-Meng Quach , Meng Chen","doi":"10.1016/j.jcsr.2025.109798","DOIUrl":"10.1016/j.jcsr.2025.109798","url":null,"abstract":"<div><div>The paper presents a numerical investigation on the cold formed stainless steel (CFSS) elliptical hollow section (EHS) subjected to pure bending. In this study, numerical modeling methodologies for cold-formed (CF) tubular beams with both the moment span and full span were first developed and validated, in which the local imperfection magnitude, plastic strains and residual stresses were predicted numerically. Based upon the validated numerical models, an extensive parametric study was carried out for CFSS EHS beams; covering two loading conditions of both the minor-axis bending and major-axis bending, the lateral-torsional buckling (LTB) effect, three stainless steel alloys, a large range of cross-section aspect ratios and sizes as well as slenderness values. A total of 391 generated numerical data together with the collected test data were used to assess the design equations and slenderness limits specified in the existing design codes of ASCE/SEI 8–22, AS/NZS-4673 and prEN 1993-1-4:2023 (E) for the design of CFSS EHS beams. In addition, the direct strength method (DSM) specified in AISI for CF square and rectangular tubular beams and the existing continuous strength method (CSM) for CFSS circular hollow section (CHS) beams were also assessed. It can be found that the aforementioned design methods were conservative for CFSS EHS beams. In this paper, new slenderness limits were proposed for CFSS EHS beams. Appropriate modifications on the design guidelines were also proposed for the CFSS EHS beams.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109798"},"PeriodicalIF":4.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685783","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