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

Mechanical investigations of axially-compressed circular CFST-CG short columns strengthened by UHPC jackets UHPC护套加固轴向压缩圆形CFST-CG短柱的力学研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-12 DOI: 10.1016/j.jcsr.2025.110162

Qihan Shen , Guanya Wang , Fengqin Wang , Jingfeng Wang , Beibei Li

{"title":"Mechanical investigations of axially-compressed circular CFST-CG short columns strengthened by UHPC jackets","authors":"Qihan Shen , Guanya Wang , Fengqin Wang , Jingfeng Wang , Beibei Li","doi":"10.1016/j.jcsr.2025.110162","DOIUrl":"10.1016/j.jcsr.2025.110162","url":null,"abstract":"<div><div>Over the past several decades, gap defects were commonly detected in concrete-filled steel tubular (CFST) structures, which significantly compromise their load-bearing capacity and operational safety. Ultra-high-performance concrete (UHPC), known for its exceptional compressive strength and durability, provides a viable solution for repairing defects in CFST structures. To investigate the strengthening effect of UHPC jackets on circular CFST columns with circumferential gap defects (CFST-CG), this study establishes a finite element (FE) model for axially loaded circular CFST-CG columns strengthened with UHPC jackets, incorporating the influence of defect characteristics and interaction effects. The accuracy of the model is validated through relevant existing experiments. The influence of various parameters, comprising gap ratio (<em>χ</em><sub>cg</sub>) and ratio of inner CFST's diameter to composite column diameter (D<sub>i</sub>/D<sub>o</sub>, simplified as <em>α</em><sub>Di/Do</sub>), on the axial compressive behavior of circular CFST-CG short columns strengthened with UHPC jackets are analyzed. The influence mechanisms of <em>χ</em><sub>cg</sub> on failure modes, load-displacement(<em>N</em>-<em>Δ</em>) curves, interaction behavior and stress distribution are elucidated. Furthermore, design formulae are established to estimate the ultimate axial capacity of circular CFST-CG columns strengthened with UHPC jackets, accounting for the influence of <em>χ</em><sub>cg</sub> and material parameters. Results indicate that the application of UHPC jacketing circular CFST-CG short columns can significantly enhance their axial compressive capacity. However, the strengthening effectiveness exhibits notable variations with the existence and increase of the <em>χ</em><sub>cg</sub> in CFST columns. The findings can be used to directly inform the evaluation and performance restoration of CFST structures with varying gap ratios.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110162"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736011","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

Different strengthening strategies on progressive collapse performance of steel frames after fire 不同加固策略对钢框架火灾后连续倒塌性能的影响

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.jcsr.2025.110192

Zhi Li , Shi-hao Wu , Kai Qian , Xi Lan

{"title":"Different strengthening strategies on progressive collapse performance of steel frames after fire","authors":"Zhi Li , Shi-hao Wu , Kai Qian , Xi Lan","doi":"10.1016/j.jcsr.2025.110192","DOIUrl":"10.1016/j.jcsr.2025.110192","url":null,"abstract":"<div><div>Steel frames repaired after fire show markedly different collapse behavior under extreme loads compared to ambient conditions. In this study, steel beam-column subassemblies using extended end-plate connections were initially exposed to fire. After cooling to ambient temperature, three strengthening strategies were applied to retrofit the structure. Subsequently, sudden column-removal tests were conducted to evaluate the dynamic performance after fire, followed by quasi-static pushdown tests to determine the residual collapse resistance once the dynamic effects subsided. The experimental resistance functions were then used to calibrate a refined single-degree-of-freedom (SDOF) model for predicting dynamic ultimate load. The results show that although strengthening had little effect on the maximum middle joint displacement during the dynamic phase, it effectively reduced the residual displacement in the stabilized phase by redistributing load paths and maintaining continuous participation throughout the deformation process. All strengthening strategies improved the initial stiffness of post-fire specimens, but the effect was confined to small deformations; after the first load drop, resistance rapidly deteriorated, revealing the intrinsic limitations of the strengthening mechanisms. The dynamic stiffness obtained from the middle column response was consistent with the initial stiffness from the pushdown test, indicating that using residual test data in the SDOF model is reasonable. Overall, perimeter weld strengthening demonstrated the most effective strengthening performance among the examined strategies.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110192"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735547","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

Load-carrying mechanism of TOBs bolted steel beam to CFST column joints TOBs螺栓连接钢梁与钢管混凝土柱节点的承载机理

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-08 DOI: 10.1016/j.jcsr.2025.110150

Min Cai , Houming Yang , Le Liu , Peijun Wang , Youkun Sun

{"title":"Load-carrying mechanism of TOBs bolted steel beam to CFST column joints","authors":"Min Cai , Houming Yang , Le Liu , Peijun Wang , Youkun Sun","doi":"10.1016/j.jcsr.2025.110150","DOIUrl":"10.1016/j.jcsr.2025.110150","url":null,"abstract":"<div><div>The load-carrying mechanism of Thread-fixed One-side Bolts (TOBs) bolted steel beam to Concrete-Filled Steel Tubular (CFST) column joints is rather complex due to the unique anchorage method of TOBs and the interaction between different components. Since this mechanism is challenging to observe directly through experiments, an advanced FE model was developed in this paper to numerically investigate the load-carrying mechanism of TOBs bolted steel beam to CFST column joints, including the failure of hole threads, coordination working between stiffener and column wall, contact pressure on endplate, and stress distribution of core concrete. In addition, a comprehensive parametric analysis was conducted on several parameters, such as installation gaps, concrete strength, stiffener type, and so on. Parametric studies encompassing 29 joint configurations revealed that: 1) Bolt diameter and endplate thickness critically influenced the load-carrying capacity of joints, with improvement by 24.9 % when increasing bolt diameter from M16 to M20 and by 17.35 % when changing endplate thickness from 14 mm to 20 mm; 2) H-shaped stiffener, P-stiffener with vertical rib or transverse rib demonstrated more uniform stress diffusion than polygonal counterpart through enhanced force transmission paths; 3) Spiral wire inserts can restore original capacity in thread-repaired joints by improving load distribution uniformity. Furthermore, the theoretical results and FEM values of yield bending moment for connections were well-matched, with errors no greater than 15 %.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110150"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693230","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 compression behavior of corrugated plate stiffened double-layer steel plate shear walls 波纹板加筋双层钢板剪力墙轴压性能研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-13 DOI: 10.1016/j.jcsr.2025.110189

Zi-Qin Jiang , Zuo-Song Zhuang , Jun-Jie Wang , Lei Su , Mei-Lin Chen , Hu Cui

{"title":"Axial compression behavior of corrugated plate stiffened double-layer steel plate shear walls","authors":"Zi-Qin Jiang , Zuo-Song Zhuang , Jun-Jie Wang , Lei Su , Mei-Lin Chen , Hu Cui","doi":"10.1016/j.jcsr.2025.110189","DOIUrl":"10.1016/j.jcsr.2025.110189","url":null,"abstract":"<div><div>In order to improve the buckling and axial compression performance of steel plate shear wall (SPSW), this paper proposes a novel corrugated plate stiffened double-layer steel plate shear wall (CPS-DSPSW), which is formed by welding boundary columns with I-shaped wall units composed of outer steel plates and corrugated plates. To investigate axial load-bearing capacity, nine specimens were designed for axial compression tests by adjusting parameters such as wall height, outer plate thickness, corrugated plate number and layout, and concrete infill. The axial performance of different specimens was measured based on the load-equivalent vertical strain curve. The test results show that CPS-DSPSW has good axial compression bearing capacity, with failure combining global instability and local buckling. Increasing the aspect ratio of the shear wall makes it more likely to cause global instability, otherwise strength failure will occur. As the thickness of the outer steel plate increases, the effective bearing cross-sectional area increases, which improves the ultimate bearing capacity of the specimen. Corrugated plate layout has little effect on the performance, as it cannot directly resist axial compressive load. By contrast, increasing wall thickness and adding concrete significantly improve axial compression performance; concrete restrains the outer plate, limits large-area local buckling, and enhances global stability. Finally, the results of the tests in this paper are compared with the compressive stability bearing design theory of the internally stiffened double-layer steel plate shear walls with flat plate, which shows that the theory can provide a reliable basis for safe design of CPS-DSPSW.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110189"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736005","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

Compressive performance and design rule of CHS X-joints with local pitting corrosion 局部点蚀CHS x形节理抗压性能及设计规律

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2026-01-02 DOI: 10.1016/j.jcsr.2025.110225

Xiaoyu Yan , Xiaohong Jian , Wenkang Zuo , Junwu Xia , Yimin Lu , Lihai Zhang , Hongfei Chang

{"title":"Compressive performance and design rule of CHS X-joints with local pitting corrosion","authors":"Xiaoyu Yan , Xiaohong Jian , Wenkang Zuo , Junwu Xia , Yimin Lu , Lihai Zhang , Hongfei Chang","doi":"10.1016/j.jcsr.2025.110225","DOIUrl":"10.1016/j.jcsr.2025.110225","url":null,"abstract":"<div><div>Local pitting corrosion poses a critical threat to the structural integrity of tubular joints in marine and offshore structures, yet its effects on CHS (Circular Hollow Section) X-joints remain inadequately understood. This study experimentally and numerically investigates the compressive performance of CHS X-joints with localized pitting corrosion. Five specimens, including both uncorroded and corroded joints fabricated via precision drilling, were tested under axial compression. All joints exhibited chord plastification as the dominant failure mode, and pitting corrosion led to significant reductions in strength and stiffness, especially in joints with larger brace-to-chord diameter ratios. Validated finite element models incorporating the element birth-and-death technique were used to assess the influence of axial and circumferential corrosion positions, corrosion rate, and geometry on joint strength. Results revealed that axial corrosion near the brace-chord intersection was the most detrimental, while circumferential position played a secondary role. Based on parametric analysis and plastic yield line theory, a new design formula was proposed to predict the residual compressive strength of corroded joints, which demonstrated strong agreement with simulation results (96 % accuracy) and offered a practical tool for structural assessment and design under localized corrosion.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110225"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881007","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

Beam–to–column joint solutions for reusable moment-resisting steel frames 可重复使用的抗弯矩钢框架的梁柱连接解决方案

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-09 DOI: 10.1016/j.jcsr.2025.110163

Isidora Jakovljević, Jelena Dobrić, Nina Gluhović, Milan Spremić

{"title":"Beam–to–column joint solutions for reusable moment-resisting steel frames","authors":"Isidora Jakovljević, Jelena Dobrić, Nina Gluhović, Milan Spremić","doi":"10.1016/j.jcsr.2025.110163","DOIUrl":"10.1016/j.jcsr.2025.110163","url":null,"abstract":"<div><div>This paper advances reusable building practices by introducing an innovative beam–to–column joint for moment-resisting steel frames. The proposed joint, featuring T-stubs and cleats, is fully demountable, employing bolted connections instead of welds. Moreover, it is designed to accommodate reclaimed steel, incorporating an adaptable link that extends the service length of existing members and adjusts them to the required span of a new structure. Experimental testing was conducted on three test specimens to evaluate joint performance and identify failure modes, moment resistance, rotation capacity and stiffness. Two joint configurations were tested, varying the T-stub section and number of bolts on the T-stub web–to–beam flange connection. Additionally, the influence of material origin, reclaimed versus new steel, was investigated through two specimens with identical configurations. Testing revealed two failure modes: bearing deformation at bolt holes in the T-stub web and failure of the first bolt row on the column flange. Results also highlighted the critical role of bolt slip resistance on the T-stub web–to–beam flange connection in governing the rotational stiffness. Finite element models were developed and validated against the experimental results to simulate the mechanical behaviour of the joints. A parametric numerical study explored key design variables, including link length, bolt diameter, and number of bolts. The findings contributed to improving the joint structural performance by increasing its resistance and delaying the stiffness degradation. Results indicated that increasing the link length from 100 to 150 mm does not have a negative effect on the joint performance.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110163"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735552","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

Corrigendum to “Axial compression behaviors of aluminium tubular columns exposed to low-temperature environment” [Journal of Constructional Steel Research 235 (2025) 109784] “低温环境下铝管柱的轴向压缩性能”的勘误表[结构钢研究杂志235 (2025)109784]

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-10 DOI: 10.1016/j.jcsr.2025.110193

Jia-Bao Yan , Jin-Ping Zhao , Yu-Cai Zhao , Yun-Biao Luo , Ming Li

引用次数: 0

Effects of pretensioning on the Z Block modular column-to-column connection 预张紧对Z块模块柱对柱连接的影响

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-31 DOI: 10.1016/j.jcsr.2025.110214

Ayotunde Giwa , Sreekanta Das , Hossein Ghaednia , Jothiarun Dhanapal

{"title":"Effects of pretensioning on the Z Block modular column-to-column connection","authors":"Ayotunde Giwa , Sreekanta Das , Hossein Ghaednia , Jothiarun Dhanapal","doi":"10.1016/j.jcsr.2025.110214","DOIUrl":"10.1016/j.jcsr.2025.110214","url":null,"abstract":"<div><div>This study investigates the effects of bolt pretensioning on the column-to-column connection made of the Z Block connector under tensile axial load. Five full-scale specimens, comprising of various pretension levels (30, 50, 61.5, 70, and 85 kips) were tested under Axial Tension Single Column (ATSC) connection. The failure mode in all specimens was the rupture of the Socket-Head-Cap-Screws (SHCSs) that connect the lower and upper block components of the Z Block. Experimental tests showed that there was a decrease in block separation and tensile capacity as bolt pretension was increased. Notably, specimen with 61.5 kips pretension was adopted as the optimal design pretension level for the Z Block connector. The specimen showed an 82 % reduction in block separation and only a 6.7 % reduction in tensile capacity in comparison to specimen with no pretension applied. Test validation and parametric study was subsequently carried out using finite element analysis to investigate other level of pretension as well as identifying the alternate design pretension level for the Z Block connector. The results of the numerical analysis showed that a pretension preload of 245 kN (55 kips) resulted in a further decrease of 0.23 mm in block separation, while maintaining a 24 % increase in tensile capacity compared to the optimal preload obtained from the experimental test.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110214"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881005","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 ductile shear connector for U-shaped composite girders: From concept to design 一种用于u形复合梁的韧性剪切接头：从概念到设计

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-26 DOI: 10.1016/j.jcsr.2025.110203

Xin-Yu Zhao, Zhou-Zi Chu, Shi Zeng, Wei-Tian Lu, Bo Wu

{"title":"A ductile shear connector for U-shaped composite girders: From concept to design","authors":"Xin-Yu Zhao, Zhou-Zi Chu, Shi Zeng, Wei-Tian Lu, Bo Wu","doi":"10.1016/j.jcsr.2025.110203","DOIUrl":"10.1016/j.jcsr.2025.110203","url":null,"abstract":"<div><div>U-shaped steel–concrete composite girders have gained increasing attention in modern structural applications due to their construction efficiency, favorable rigidity, and high strength-to-weight ratio. The overall composite action of such systems, however, largely depends on the performance of the shear connectors that transfer longitudinal shear forces between the steel U-section and the concrete. Conventional welded angle connectors, though capable of providing high initial stiffness, are prone to brittle tearing at the weld toes and suffer from residual stresses and fabrication challenges. To overcome these limitations, this study presents a proof-of-concept investigation into bolted angle connectors as a ductile and construction-friendly alternative. Seventeen push-out tests and a suite of validated finite-element simulations were conducted to evaluate the effects of geometric, material, and construction parameters on shear transfer, deformation, and resistance. Two distinct failure modes were identified: (i) combined angle plasticity and bolt shear failure (Mode I) and (ii) pure bolt shear failure (Mode II). Specimens with large bolt diameter-to-angle thickness ratios (<em>d</em>/<em>t</em> > 4) developed a dual-hinge mechanism, in which two plastic hinges formed in the bolted and vertical legs. This mechanism embodies the capacity-design principle, enabling sustained rotation, delayed bolt fracture, and gradual post-peak response. In particular, its resulting slip capacity readily satisfied the 6 mm ductility criterion of Eurocode 4, thereby qualifying these connectors as ductile. A power-law regression model was developed to relate the connector shear resistance to geometric and material parameters, and a flange-corrected version was proposed to account for the flange effects of thin-walled U-sections. Both formulations demonstrated good predictive accuracy.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"238 ","pages":"Article 110203"},"PeriodicalIF":4.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837561","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 a new bolted moment connection for cold-formed steel frames 冷弯型钢框架一种新型螺栓弯矩连接的数值研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2026-03-01 Epub Date: 2025-12-13 DOI: 10.1016/j.jcsr.2025.110153

Hamed Naserirad, Yousef Hosseinzadeh

引用次数: 0