Journal of Constructional Steel Research最新文献_第5页

Eccentric loading behavior of CFDEST short columns: Testing, modeling and design CFDEST短柱偏心加载性能：试验、建模与设计

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-05 DOI: 10.1016/j.jcsr.2025.110222

Jingwei Chen , Qihan Shen , Jingfeng Wang , Beibei Li , Yong Liu , Lei Guo

{"title":"Eccentric loading behavior of CFDEST short columns: Testing, modeling and design","authors":"Jingwei Chen , Qihan Shen , Jingfeng Wang , Beibei Li , Yong Liu , Lei Guo","doi":"10.1016/j.jcsr.2025.110222","DOIUrl":"10.1016/j.jcsr.2025.110222","url":null,"abstract":"<div><div>Elliptical steel tube (EST) has gained increasing adoption in structural engineering due to their favorable mechanical performance and architectural appeal. This study investigates the behavior of eccentrically-loaded concrete-filled double-skin elliptical steel tube (CFDEST) short columns through experimental and numerical analyses. The effects of key parameters, including load eccentricity, hollow ratio, diameter-to-thickness ratio, and aspect ratio, on failure modes, strength, and ductility are systematically examined. Furthermore, the distribution mechanisms of interfacial contact stress and longitudinal stress in concrete and EST are revealed. Based on experimental and analytical results, simplified design formulas are proposed to predict the eccentric compression strength of CFDEST columns, incorporating the influences of load eccentricity, hollow ratio, and cross-sectional characteristics. The results show that failure is characterized by semi-circumferential bulging of the outer EST, local inward buckling of the inner EST, and concrete crushing. The eccentric compressive strength decreases with increasing load eccentricity, hollow ratio, and diameter-to-thickness ratio. To optimize steel strength utilization, the strength of the inner EST should be designed lower than that of the outer EST. The findings provide a scientific basis for the design and implementation of CFDEST structures in practice.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110222"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145895817","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

Behavior of two-storey welded steel frames strengthened with external prestressed strands 外预应力钢绞线加固两层焊接钢框架的性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-12 DOI: 10.1016/j.jcsr.2026.110236

Kai Qian , Pengfei Xiao , Xi Lan , Feng Fu , Zhi Li

{"title":"Behavior of two-storey welded steel frames strengthened with external prestressed strands","authors":"Kai Qian , Pengfei Xiao , Xi Lan , Feng Fu , Zhi Li","doi":"10.1016/j.jcsr.2026.110236","DOIUrl":"10.1016/j.jcsr.2026.110236","url":null,"abstract":"<div><div>A possible solution for enhancing the resistance of welded steel frames against progressive collapse is external installation of prestressed strands. Although several experimental studies have been conducted on steel frames with prestressed strands, most of these studies have focused only on individual joints or single-story substructures, while neglecting the interaction between different stories in multi-story frames. The objective of this research is to conduct a detailed study on the impact of prestressed strands on the progressive collapse resistance of welded steel frame structures. Pushdown tests were performed on two-story steel frame substructures with and without prestressed strand strengthening. Additionally, corresponding numerical models were established using LS-DYNA. Further parametric analyses were conducted to investigate the effects of prestressing level, strand diameter, layout type, and lateral restraint stiffness on the collapse resistance. The results show that the load-carrying capacity of frames strengthened with prestressed strands is higher than that of bare steel frames, which is mainly attributed to the significant enhancement of the frame's catenary action (CA) capacity after prestressed strand strengthening. Furthermore, analysis of horizontal reaction forces indicates that there are differences in the CA resistance among different stories. Through numerical analyses, it is concluded that compared with polyline and diagonal layouts, the straight and parallel layout provide a more significant enhancement in the load resistance of steel frames.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110236"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979391","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

Design recommendations for Howick Rivet Connectors in cold-formed steel connections 冷弯型钢连接中豪威克铆钉连接器的设计建议

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-14 DOI: 10.1016/j.jcsr.2026.110244

Wei Wang , Krishanu Roy , Hooman Rezaeian , Renzhe Ma , Linfeng Lu , Zhengxin Xie , James B.P. Lim

{"title":"Design recommendations for Howick Rivet Connectors in cold-formed steel connections","authors":"Wei Wang , Krishanu Roy , Hooman Rezaeian , Renzhe Ma , Linfeng Lu , Zhengxin Xie , James B.P. Lim","doi":"10.1016/j.jcsr.2026.110244","DOIUrl":"10.1016/j.jcsr.2026.110244","url":null,"abstract":"<div><div>This study develops a validated finite element (FE) model for T-stub connections with Howick Rivet Connectors (HRCs) and carries out a systematic parametric analysis considering variations in rivet diameter, plate thickness, and steel grade. Using numerical simulations together with previously published experimental data, the accuracy of existing bearing and shear strength formulas is evaluated, revealing substantial discrepancies when these formulas are applied to a wider dataset. To address these limitations, new strength formulas are proposed and validated through reliability analysis, achieving an average test/FEA-to-predicted ratio of 1.04 and correctly identifying failure modes in 91% of cases. Compared with existing design formulas, the proposed equations reduce prediction bias by approximately 18% and decrease strength dispersion by about 5%, demonstrating notable improvements in both accuracy and reliability. Based on the combined numerical and experimental findings, design recommendations are provided to support the practical use of HRC connections in cold-formed steel structures.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110244"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979397","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

Torsional behaviour of steel-reinforced concrete-filled circular stainless steel tubular specimens 钢筋混凝土填充圆形不锈钢管试件的扭转性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-09 DOI: 10.1016/j.jcsr.2026.110232

Zhuo Chen , Zhi-Bin Wang , Jia-Chun Chen , Dong Li , Jing-Dong Tong

{"title":"Torsional behaviour of steel-reinforced concrete-filled circular stainless steel tubular specimens","authors":"Zhuo Chen , Zhi-Bin Wang , Jia-Chun Chen , Dong Li , Jing-Dong Tong","doi":"10.1016/j.jcsr.2026.110232","DOIUrl":"10.1016/j.jcsr.2026.110232","url":null,"abstract":"<div><div>The torsional performance of steel-reinforced concrete-filled (circular) stainless steel tubular (SRCFSST) specimens was evaluated through experiments on fourteen specimens, including circular SRCFSST specimens and their concrete-filled (circular) stainless steel tubular (CFSST) counterparts. Embedding carbon profiled steel (CPS) increased the torsional resistance and stiffness of circular CFSST specimens by up to 27.2 % and 37.8 %, respectively. The CPS effectively delayed the propagation of concrete cracks. A finite element (FE) model was built for torsional analysis of circular SRCFSST specimens, and the simulation results agreed well with the test data. The mechanism analysis demonstrated that the CPS enhanced the confinement effect, leading to a significant increase (32.6 %) in the shear resistance of concrete. FE parametric analysis further revealed that both torsional stiffness and resistance increased with increasing steel ratios. Finally, simplified models were developed for predicting the torsional stiffness and resistance of circular SRCFSST specimens.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110232"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940933","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

Axial behavior of RBA concrete column confined with lipped cold-formed steel box 唇形冷弯钢箱约束下RBA混凝土柱的轴向性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-21 DOI: 10.1016/j.jcsr.2026.110248

Pranoy Roy , Amiya K. Samanta

{"title":"Axial behavior of RBA concrete column confined with lipped cold-formed steel box","authors":"Pranoy Roy , Amiya K. Samanta","doi":"10.1016/j.jcsr.2026.110248","DOIUrl":"10.1016/j.jcsr.2026.110248","url":null,"abstract":"<div><div>The rapid industrial and infrastructural growth throughout the globe generates a huge amount of Construction and Demolition (C&D) waste annually, which is mostly dumped and, as a result, degrades the environment largely. Recycled Brick Aggregate (RBA), which is mainly available from demolition of old masonry structures, can be processed as C&D waste, but it is primarily used for non-structural purposes due to its low strength and high water absorption capacity. On the other hand, cold formed steel is also used for non-structural applications due to its susceptibility to local buckling; however, it has proven its efficiency in providing passive confinement to concrete through enhanced load-carrying capacity and improved ductility. This study proposes a sustainable solution by considering a composite system of RBA concrete stub columns confined with thin-walled cold-formed steel, utilizing waste RBA to develop an effective structural solution for low-cost housing. In the present investigation, an experimental and numerical study on the axial compressive behaviour of seventy-five short columns has been conducted, where Natural Coarse Aggregate (NCA) was replaced with RBA in variable percentages of 0, 30, 50, 70 and 100, considering M30 grade concrete. The samples were divided into unconfined and confined samples with 1mm and 1.5mm thick cold formed lipped box sections of height 300mm and 500mm, respectively. Experimental results show improved performance in samples up to 30% replacement of NCA with RBA. The experimental peak loads were compared with existing codal stipulations and Finite Element Models (FEM). Based on the experimental data and findings, a Response Surface Methodology (RSM) based predictive equation is proposed for calculating the peak load applicable to similar configurations.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110248"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035169","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 optimization design of Fe-SMA shear-friction hybrid dampers Fe-SMA剪切-摩擦混合阻尼器抗震优化设计

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-19 DOI: 10.1016/j.jcsr.2026.110253

Yunyun Zhu , Guanfan Chen , Jianrong Pan , Tulong Yin , Dian Wang

{"title":"Seismic optimization design of Fe-SMA shear-friction hybrid dampers","authors":"Yunyun Zhu , Guanfan Chen , Jianrong Pan , Tulong Yin , Dian Wang","doi":"10.1016/j.jcsr.2026.110253","DOIUrl":"10.1016/j.jcsr.2026.110253","url":null,"abstract":"<div><div>This study aims to enhance the seismic resilience of semi-rigid steel frames and to promote engineering applications through the optimized spatial deployment of a novel iron-based shape memory alloy shear-friction hybrid damper (FSMA-SFHD). The proposed FSMA-SFHD combines Fe-SMA shear plates with a friction unit, integrating the excellent low-cycle fatigue resistance of Fe-SMA with the rapid response of the friction unit under small-amplitude vibrations, thereby enabling efficient energy dissipation over the entire seismic cycle. To accurately simulate its mechanical behavior, a finite element model of the FSMA-SFHD was established based on the OpenSees platform, and its validity was verified through comparative mechanical performance tests. A multi-objective performance index that jointly considers inter-story drift ratio, floor acceleration, and roof displacement was formulated, and an elitist-preserving genetic algorithm was employed to optimize damper locations under a fixed damper quantity. Case studies on three-bay ten-story and four-bay eight-story frames show that the optimized layouts outperform random configurations: the optimized results demonstrate that, compared to random damper arrangements, the proposed scheme significantly enhances the peak displacement reduction ratio and base shear reduction ratio of the structure while maintaining the total number of dampers, thereby effectively improving the overall seismic performance.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110253"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035105","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 and prediction resilience of multi-cavity rectangular concrete-filled steel tube columns 多腔矩形钢管混凝土柱的抗震性能及预测回弹性

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jcsr.2025.110227

Wen-zhuo Yu , Jing Liu , Wen-jun Wang , Guo-hui Cao , Yi-ming Yang , Zhi-cheng Pan

{"title":"Seismic performance and prediction resilience of multi-cavity rectangular concrete-filled steel tube columns","authors":"Wen-zhuo Yu , Jing Liu , Wen-jun Wang , Guo-hui Cao , Yi-ming Yang , Zhi-cheng Pan","doi":"10.1016/j.jcsr.2025.110227","DOIUrl":"10.1016/j.jcsr.2025.110227","url":null,"abstract":"<div><div>Rectangular concrete-filled steel tube (RCFST) columns have been widely applied in structural engineering because of their outstanding mechanical performance and construction efficiency. To address the limited confinement provided by single-cavity steel tubes in members with high width-to-thickness ratios, a multi-cavity RCFST (M-RCFST) configuration is proposed, in which stiffening steel plates partition the concrete core into multiple compartments. Quasi-static tests were conducted on eight M-RCFST specimens to examine the effects of cavity arrangement and axial compression ratio on key performance indices, including load-bearing capacity, stiffness, ductility, and energy dissipation, as well as failure mechanisms and load–displacement responses. The results indicate that an increase in cavity number significantly enhances load-bearing capacity, stiffness, energy dissipation, and ductility. By comparison, a higher axial compression ratio shows a limited effect on most properties but generally leads to reduced ductility. Based on the experimental results, a quasi-static finite element model of M-RCFST columns was established using ABAQUS and reproduced the observed failure modes, with acceptable agreement in hysteretic and skeleton curves. The average ratio of simulated to experimental peak load is 0.966, confirming the reliability of the numerical model. On this basis, a parametric study was carried out by varying cavity number, axial compression ratio, concrete strength, and steel strength. A restoring force model for M-RCFST columns was then developed from the finite element results and effectively represents the hysteretic response of the specimens. These results provide a quantitative basis for optimizing the seismic design of M-RCFST columns and support the development of engineering applications.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110227"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940910","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

A unified method for predicting cross-sectional capacity of confined CFST columns 承压钢管混凝土柱截面承载力的统一预测方法

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.jcsr.2025.110224

Yinglong Li , Faqi Liu , Jialu Ma , Shuquan Xu

{"title":"A unified method for predicting cross-sectional capacity of confined CFST columns","authors":"Yinglong Li , Faqi Liu , Jialu Ma , Shuquan Xu","doi":"10.1016/j.jcsr.2025.110224","DOIUrl":"10.1016/j.jcsr.2025.110224","url":null,"abstract":"<div><div>Concrete-filled steel tubular (CFST) columns may experience reduced cross-sectional capacity due to environmental and accidental actions. External confinement retrofitting methods (ECRMs), such as fiber reinforced polymer (FRP) fabric bonding and tube-grout confinement schemes, offer practical strengthening solutions. However, existing calculation methods are typically limited to specific cross-sectional shapes or confinement schemes, with complex formulations or lacking general applicability. This paper develops a unified calculation method for predicting the cross-sectional capacity of confined CFST columns with various cross-sections (circular, square, and rectangular) and confinement schemes (FRP fabric external bonding, FRP tube-grout confining, and steel tube-grout confining). Comprehensive validation against a database of 277 experimental results demonstrates good prediction accuracy, with 70 % of predictions within ±13 % relative error. The proposed unified framework eliminates the need for multiple calculation approaches, providing engineers with a practical tool for design of strengthened CFST columns under diverse service conditions.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110224"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940935","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

Intelligent evaluation framework for bonded-bolted hybrid joints between Fe-SMA and steel 铁- sma -钢复合粘结-螺栓连接智能评价框架

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jcsr.2025.110231

Xuhong Qiang , Xinrui Li , Kaihao Wang , Xu Jiang , Xuanyi Lei , Fan Yang

{"title":"Intelligent evaluation framework for bonded-bolted hybrid joints between Fe-SMA and steel","authors":"Xuhong Qiang , Xinrui Li , Kaihao Wang , Xu Jiang , Xuanyi Lei , Fan Yang","doi":"10.1016/j.jcsr.2025.110231","DOIUrl":"10.1016/j.jcsr.2025.110231","url":null,"abstract":"<div><div>This study investigates the mechanical performance of bonded-bolted hybrid joints (BHJs) between Fe-SMA and steel through finite element analysis and machine learning. The effects of geometric and material parameters, including end and edge distances, adhesive type, bolt diameter, plate thickness, bolt spacing, and lap length, were systematically examined. Meanwhile, the mechanical performance of BHJs was comprehensively compared with those of pure bonded and pure bolted joints. The parametric study reveals that the bolt edge distance is the most critical factor, as its increase leads to a significant improvement in both the ultimate load-bearing capacity and initial stiffness. The increment of bolt diameter and Fe-SMA plate thickness also substantially enhances the load-bearing capacity of the joints, while these parameters themselves serve as key controlling factors in preventing brittle failure modes. On this basis, an XGBoost model was developed to predict the ultimate load-bearing capacity of BHJs, incorporating five-fold cross-validation and the Optuna algorithm for optimization. The refined XGBoost model exhibits excellent predictive performance, with a coefficient of determination (<em>R</em><sup>2</sup>) exceeding 0.98 and a mean absolute percentage error (MAPE) of 5.89 %.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110231"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940931","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

Impact of vertical pipe splicing on the stability of disk-buckle scaffolding 垂直管道拼接对盘扣式脚手架稳定性的影响

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.jcsr.2026.110252

Renzhang Yan , Haoping Ji , Shuai Wang , Penggang Zhu , Kai Peng , Changlong Zhang

{"title":"Impact of vertical pipe splicing on the stability of disk-buckle scaffolding","authors":"Renzhang Yan , Haoping Ji , Shuai Wang , Penggang Zhu , Kai Peng , Changlong Zhang","doi":"10.1016/j.jcsr.2026.110252","DOIUrl":"10.1016/j.jcsr.2026.110252","url":null,"abstract":"<div><div>Based on the steel pipe scaffold vertical pipes commonly used in engineering, this study established vertical pipe models under different splicing conditions. Adopting a combined method of theoretical derivation, numerical simulation, and experimental research, it conducted research on the influence law of vertical pipe splicing on its stability. Firstly, a calculation method for the stability of variable-section vertical pipes considering joint semi-rigidity was proposed through theoretical derivation. Subsequently, axial compression tests were carried out on vertical pipes with different splicing configurations, and combined with finite element simulation, the influence law of splicing positions on the ultimate bearing capacity and instability failure mode of vertical pipes was revealed. The research results show that: splicing of vertical pipes significantly enhances their ultimate bearing capacity, and the enhancement degree is closely related to the splicing position, with a maximum enhancement of 33.75%; additionally, the failure position of vertical pipes changes with different splicing conditions. Finally, a practical calculation method considering joint semi-rigidity and arbitrary position splicing was established through experimental correction.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"239 ","pages":"Article 110252"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035168","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