Journal of Constructional Steel Research最新文献_第2页

Compressive performance of concrete-filled plastic-lined steel tubular T-joints: experiments and formulation 塑料衬里钢管混凝土t形节点的抗压性能：试验与配方

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-16 DOI: 10.1016/j.jcsr.2026.110246

Wen-Chao Xie , Yong Ye , Hang Jiang , Ping Jin , Yang Liu

The axial compressive behavior of concrete-filled plastic-lined steel tubular (CFPLST) joints is investigated through experimental investigation and finite element analysis. Seven T-joints were tested under monotonic axial compression applied to the circular hollow-section web, while the chord was simply supported. The experimental program systematically investigated the effects of key parameters, including the web-to-chord diameter ratio β (0.36–0.69), concrete strength f_cu (30 MPa and 85 MPa), fillet-weld leg size h_w (3–7 mm) and casting sequence (pre- vs post-welding). All specimens failed by local buckling of the web near the saddle; neither chord punching-shear, weld rupture nor concrete crushing was observed. The chord ovalization remained below 1% and the polyethylene liner stayed intact, confirming that the compressive capacity is governed by web instability rather than by chord strength. A parallel finite element analysis (FEA) model, validated with test data, was used to extend the parametric space to 120 analyses. The numerical study showed that β is the dominant factor influencing the ultimate load, whereas f_cu, h_w and the plastic-layer thickness have minor influence. Finally, a mechanics-based design equation is proposed that predicts the axial compressive capacity of CFPLST T-joints within ±5% of both experimental and FEA results, providing a simple and reliable tool for practical design and direct application in SSC-filled truss structures.

采用试验研究和有限元分析相结合的方法，对钢管混凝土节点轴压性能进行了研究。7个t形节点在单轴压缩作用下进行了试验，空心截面腹板为圆形，弦为简支。实验程序系统地研究了关键参数的影响，包括网弦直径比β(0.36 ~ 0.69)、混凝土强度fcu （30 MPa和85 MPa）、角焊腿尺寸hw （3 ~ 7 mm）和浇筑顺序（焊前与焊后）。所有试件均因鞍座附近腹板局部屈曲而失效；弦冲剪、焊缝断裂、混凝土破碎均未发生。弦圆度保持在1%以下，聚乙烯衬垫保持完整，证实了抗压能力是由腹板不稳定性而不是弦强度决定的。采用并行有限元分析（FEA）模型，通过试验数据验证，将参数空间扩展到120个分析。数值研究表明，β是影响极限荷载的主要因素，而fcu、hw和塑性层厚度对极限荷载的影响较小。最后，提出了一种基于力学的设计方程，该方程预测了CFPLST t型节点的轴压承载力，其预测误差在试验和有限元结果的±5%以内，为ssc填充桁架结构的实际设计和直接应用提供了一种简单可靠的工具。

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引用次数: 0

Assessing local stresses in crane runway girders considering the rail support 考虑轨道支撑的起重机跑道梁局部应力评估

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-16 DOI: 10.1016/j.jcsr.2026.110245

Paul Zauchner, Markus Kettler, Harald Unterweger

This paper introduces a design model for predicting local stresses in the web plates of I-section crane runway girders. A critical review of current design procedures reveals two principal shortcomings: (i) the role of the elastomeric bearing pad between the rail and the top flange is insufficiently accounted for, and (ii) existing methods cannot adequately capture the longitudinal distribution of local stresses. To address these gaps, new analytical expressions are developed and calibrated. The stiffness characteristics of elastomeric bearing pads are quantified through laboratory compression tests. Full-scale experiments on a crane runway girder are conducted to measure local strains and to assess the influence of both the bearing pad and geometric imperfections at the rail-flange interface. A comprehensive finite element parametric study is then used to calibrate and validate the analytical model. The resulting design model accurately reproduces local stress fields in contrast to current standards. It enables more economical girder designs by explicitly considering the beneficial effects of elastomeric bearing pads. Furthermore, the new design model provides a simple, standards-compatible modification (based on established analytical solutions) for both cases (elastomeric or rigid rail support).

本文介绍了一种预测工字起重机跑道梁腹板局部应力的设计模型。对当前设计程序的批判性审查揭示了两个主要缺点：(i)钢轨和顶部法兰之间的弹性支承垫的作用没有得到充分考虑；（ii）现有方法不能充分捕捉局部应力的纵向分布。为了解决这些差距，开发和校准了新的分析表达式。通过室内压缩试验，量化了弹性轴瓦的刚度特性。在某起重机跑道梁上进行了全尺寸试验，测量了局部应变，并评估了支承垫和轨道-翼缘界面几何缺陷的影响。然后进行了全面的有限元参数研究，以校准和验证分析模型。与现行标准相比，由此产生的设计模型准确地再现了局部应力场。它使更经济的梁设计通过明确考虑橡胶支座的有利影响。此外，新的设计模型为两种情况（弹性体或刚性轨道支撑）提供了一个简单的，标准兼容的修改（基于已建立的分析解决方案）。

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引用次数: 0

Experimental study on frame-supported cold-formed thin-walled steel structure 框架支撑冷弯薄壁钢结构试验研究

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-15 DOI: 10.1016/j.jcsr.2026.110235

Yuxuan Zou , Rui Wei , Yu Shi , Xinmei Yao

A series of tests and numerical analyses were conducted in this study to investigate the seismic performance of frame-supported cold-formed thin-walled steel structures (FCTSS). The FCTSS consists of two parts. The lower part was reinforced concrete or steel frame, and the upper part was comprised of cold-formed thin-walled steel walls. The variables include the lower frame type, interstory stiffness ratio, vertical load, and screw spacing. The experimental and numerical results reveal that all lower frames remained elastic without visible damage, while the upper walls experienced severe damage, involving corner crushing, rigid rotation, and out-of-plane buckling of Oriented Strand Board (OSB) panels. Compared with walls supported by steel frames, walls supported by reinforced concrete frames demonstrated slightly higher yield and peak loads, whereas the ductility decreased. The increase in the stiffness of the lower frame exerted a negligible impact on the seismic response of the upper walls. Notably, reducing the perimeter screw spacing significantly improved the cyclic behavior of upper walls.

本文对框架支撑冷弯薄壁钢结构（FCTSS）的抗震性能进行了一系列试验和数值分析。FCTSS由两部分组成。下部为钢筋混凝土或钢框架，上部为冷弯薄壁型钢墙。变量包括下框架类型、层间刚度比、垂直荷载和螺钉间距。实验和数值结果表明，所有下部框架均保持弹性，无明显损伤，而上部墙体则遭受严重损伤，包括角压、刚性旋转和定向刨花板（OSB）板的面外屈曲。与钢框架支撑的墙体相比，钢筋混凝土框架支撑的墙体屈服和峰值荷载略高，但延性有所下降。下框架刚度的增加对上墙的地震反应的影响可以忽略不计。值得注意的是，减小周长螺杆间距可以显著改善上部壁面的循环性能。

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引用次数: 0

Fatigue performance evaluation of stainless steel cruciform joint with welding undercut defects 带焊边缺陷的不锈钢十字形接头疲劳性能评价

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-15 DOI: 10.1016/j.jcsr.2026.110249

Zhikuan Ren , Haosong Chang , Qingrui Yue , Xiaogang Liu

This study proposes a rapid method for quantifying fatigue degradation in welded joints with undercut defects. Cruciform joints with precisely machined undercut defects were fabricated through wire cutting, and fatigue tests were conducted with damage evolution monitored by acoustic emission (AE) signals. A finite element model incorporating AE-based fatigue damage mechanics was developed on the ABAQUS platform to simulate the fatigue failure process, and its reliability was validated against experimental data. The model was further employed to investigate the influence of undercut depth and radius on fatigue strength. Parametric analyses revealed that increasing defect depth and decreasing defect radius both markedly reduce fatigue performance, with depth exerting a dominant effect. Certain combinations of depth and radius led to similar reductions in fatigue strength, highlighting the coupled impact of geometric parameters. Based on numerical simulations, practical fatigue performance evaluation curves were proposed, including a simplified allowable-depth curve for cases where only defect depth can be measured. By integrating AE-based damage mechanics with defect-geometry numerical modeling, the proposed approach provides a rapid and reliable tool for assessing fatigue degradation and quality control of undercut-affected welded joints, ensuring structural safety while significantly improving assessment efficiency.

本研究提出了一种快速量化带有侧切缺陷的焊接接头疲劳退化的方法。采用线切割技术制备了具有精密加工下切缺陷的十字形接头，并进行了疲劳试验，利用声发射信号监测损伤演变。在ABAQUS平台上建立了基于ae的疲劳损伤力学有限元模型，模拟了疲劳破坏过程，并通过实验数据验证了模型的可靠性。利用该模型进一步研究了下切深度和下切半径对疲劳强度的影响。参数分析表明，增加缺陷深度和减小缺陷半径均显著降低疲劳性能，且深度起主导作用。深度和半径的某些组合导致了相似的疲劳强度降低，突出了几何参数的耦合影响。在数值模拟的基础上，提出了实用的疲劳性能评价曲线，其中包括仅能测量缺陷深度的简化允许深度曲线。该方法将基于ae的损伤力学与缺陷几何数值模拟相结合，为欠切影响焊接接头的疲劳退化评估和质量控制提供了快速可靠的工具，在保证结构安全的同时显著提高了评估效率。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub 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

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.

本研究开发了一个经过验证的有限元（FE）模型，用于使用Howick铆钉连接器（hrc）的t形短节连接，并进行了系统的参数分析，考虑了铆钉直径、板厚和钢等级的变化。利用数值模拟和先前发表的实验数据，评估了现有的承载和抗剪强度公式的准确性，揭示了这些公式在应用于更广泛的数据集时存在的巨大差异。为了解决这些限制，提出了新的强度公式，并通过可靠性分析进行了验证，实现了平均试验/有限元与预测的比值为1.04，在91%的情况下正确识别了失效模式。与现有设计公式相比，本文提出的方程预测偏差降低了约18%，强度离散度降低了约5%，精度和可靠性均有显著提高。结合数值和试验结果，提出了HRC连接在冷弯型钢结构中实际应用的设计建议。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-12 DOI: 10.1016/j.jcsr.2026.110236

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

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.

提高焊接钢框架抗逐渐倒塌的能力的一个可能的解决方案是在外部安装预应力钢绞线。虽然对预应力钢框架进行了一些试验研究，但这些研究大多集中在单个节点或单层子结构上，而忽略了多层框架中不同层间的相互作用。本研究的目的是详细研究预应力筋对焊接钢框架结构抗递进倒塌的影响。对两层钢框架下部结构进行了预应力钢绞线加固和不加预应力钢绞线加固的压下试验。并利用LS-DYNA建立了相应的数值模型。进一步进行了参数分析，探讨了预应力水平、钢绞线直径、布置类型和侧约束刚度对抗倒塌性能的影响。结果表明：预应力筋加固框架的承载能力高于裸钢框架，这主要是由于预应力筋加固后框架的悬链线作用（CA）能力显著增强。此外，水平反作用力分析表明，不同楼层的CA阻力存在差异。通过数值分析得出，与折线布置和对角布置相比，直线和平行布置对钢框架的抗荷载能力有更显著的提高。

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引用次数: 0

Damage assessment method for natural gas pipeline dents via modified Mohr-Coulomb criterion 基于修正Mohr-Coulomb准则的天然气管道凹痕损伤评估方法

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-12 DOI: 10.1016/j.jcsr.2025.110228

Chaobei Gao , Ying Wu , Zhuohong Du , Kang Cen

Dents, common defects in natural gas pipelines, can cause stress concentration, which can potentially lead to leaks or ruptures and pose significant safety risks. This study presents a pipeline dent damage assessment method based on the modified Mohr–Coulomb ductile fracture criterion and the finite element method. A dual-criterion framework incorporating a damage monitoring criterion and a damage fracture criterion is established. This system employs a hybrid test-simulation approach combined with the modified Mohr–Coulomb criterion. A cumulative-damage finite element model that accounts for a historical variable is developed, and this method addresses the shortcomings of traditional approaches that overlook damage accumulation effects. On this basis, dent depth is integrated with the historical variable, and two assessment indicators are proposed, namely the damage monitoring threshold and the damage fracture threshold. Through multi-factor threshold analysis, the method demonstrates high adaptability and effectiveness in engineering applications. Overall, this study provides a practical and reliable solution for pipeline integrity assessment.

凹痕是天然气管道中常见的缺陷，它会引起应力集中，从而可能导致泄漏或破裂，并构成重大安全风险。提出了一种基于修正Mohr-Coulomb韧性断裂准则和有限元法的管道凹痕损伤评估方法。建立了包含损伤监测准则和损伤断裂准则的双准则框架。该系统采用混合测试模拟方法，并结合改进的莫尔-库仑准则。建立了考虑历史变量的累积损伤有限元模型，解决了传统方法忽略损伤累积效应的不足。在此基础上，将凹痕深度与历史变量相结合，提出了损伤监测阈值和损伤断裂阈值两个评价指标。通过多因素阈值分析，该方法在工程应用中具有较高的适应性和有效性。总体而言，本研究为管道完整性评估提供了一个实用可靠的解决方案。

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引用次数: 0

Diagonal-extremum model for shear strength in double steel plate-concrete composite shear wall 双钢板-混凝土组合剪力墙抗剪强度的对角极值模型

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-10 DOI: 10.1016/j.jcsr.2025.110226

Wentao Liang , Yuanlong Yang , Jian Zhang , Xiangsheng Chen , Xiong Peng , Yohchia Frank Chen

The double steel plate-concrete composite shear wall (DSCW) is a promising structure for high-rise buildings due to its excellent performance and construction efficiency. This study proposes a novel theoretical model, diagonal-extremum model, to accurately predict the shear strength of DSCW. The model is developed through mechanical analysis and the Lagrange multiplier method. Validation against 24 experimental results demonstrates its high accuracy, with an average calculated-to-tested strength ratio of 0.94 and a standard deviation of 6.9 %. Furthermore, a comprehensive finite element (FE) analysis involving 600 models confirms the model's superiority over the current Chinese code (JGJ 380–2015), showing that our model achieves a prediction error within ±15 % for 94 % of the cases, significantly outperforming the code method. The proposed model provides a more reliable and theoretically sound tool for the design and analysis of DSCW.

双钢板-混凝土组合剪力墙以其优异的性能和施工效率，是一种很有发展前途的高层建筑结构形式。本文提出了一种新的理论模型——对角极值模型，以准确地预测DSCW的抗剪强度。通过力学分析和拉格朗日乘数法建立了该模型。对24个试验结果的验证表明，该方法具有较高的准确性，平均计算强度比为0.94，标准偏差为6.9%。此外，涉及600个模型的综合有限元（FE）分析证实了该模型优于现行中国规范（JGJ 380-2015），表明我们的模型在94%的情况下实现了±15%的预测误差，显著优于代码方法。所提出的模型为DSCW的设计和分析提供了一个更可靠和理论上合理的工具。

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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-09 DOI: 10.1016/j.jcsr.2026.110232

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

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.

通过对钢筋（圆形）不锈钢管混凝土（SRCFSST）和圆形（圆形）不锈钢管混凝土（CFSST）共14个试件的抗扭性能试验，评价了其抗扭性能。碳异形钢（CPS）的埋置可使圆形CFSST试件的抗扭强度和刚度分别提高27.2%和37.8%。CPS有效地延缓了混凝土裂缝的扩展。建立了圆形SRCFSST试件扭转有限元模型，仿真结果与试验数据吻合较好。机理分析表明，CPS增强了约束效应，使混凝土抗剪性能显著提高（32.6%）。有限元参数分析进一步表明，随着钢比的增加，扭转刚度和阻力均增加。最后，建立了圆形SRCFSST试件扭转刚度和抗扭抗力的简化模型。

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引用次数: 0

Flexural and torsional behavior of H-section composite girders with welded C-channels 焊接c型槽的h型钢组合梁的弯扭性能

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-09 DOI: 10.1016/j.jcsr.2025.110217

In-Rak Choi , Sung-Chan Yang , Jae-Hwan Kyung , Sang-Hyeon Jeon

Conventional H-section composite beams for long-span construction are susceptible to lateral-torsional buckling (LTB), particularly during the construction phase. This study introduces the Wide Steel Composite (WSC) girder, a novel section designed to address this vulnerability and enable slim-floor construction. The WSC girder consists of an H-section with a C-channel welded to its bottom flange to enhance torsional rigidity. This enhanced rigidity was quantified through finite element analysis (FEA), which demonstrated that the torsional constant (

J

) and warping constant (

C_{w}

) increased by up to 1.42 and 2.69 times, respectively, compared to a standard H-section. The girder's flexural performance was then investigated through four-point bending tests on five specimens with varying shear connector configurations. All WSC composite girders exhibited ductile flexural behavior, failing by concrete crushing after significant steel yielding. Notably, the specimen relying only on transverse stiffeners achieved comparable strength to those with traditional shear connectors, demonstrating that the stiffeners provide sufficient shear transfer through direct bearing. The experimental flexural strengths exceeded the nominal strengths calculated via the AISC 360–22 plastic stress distribution method by 15–18 %. The non-composite WSC girder's strength was also accurately predicted by AISC 360–22 Chapter F and validated by FEA.

用于大跨度结构的传统h型钢组合梁容易发生侧向扭转屈曲，特别是在施工阶段。本研究介绍了宽钢复合梁（WSC），这是一种新型截面，旨在解决这一脆弱性并实现薄层结构。WSC梁由h型梁和焊接在其底部法兰上的c型槽组成，以提高扭转刚度。通过有限元分析（FEA）量化了这种增强的刚度，结果表明，与标准h截面相比，扭转常数(J)和翘曲常数（Cw）分别增加了1.42倍和2.69倍。然后，通过对五个具有不同剪切连接件配置的试件进行四点弯曲试验，研究了梁的抗弯性能。所有WSC组合梁均表现出延性弯曲行为，在钢屈服后被混凝土压碎而破坏。值得注意的是，仅依靠横向加强筋的试件获得了与传统剪切连接件相当的强度，这表明加强筋通过直接承载提供了足够的剪切传递。试验抗弯强度比AISC 360-22塑性应力分布法计算的名义强度高15 - 18%。采用AISC 360-22第F章对非复合WSC梁的强度进行了准确预测，并进行了有限元分析验证。

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引用次数: 0