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

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

A theoretical model of bending–torsion coupling behavior for curved composite box girders with corrugated steel webs 波纹钢腹板弯曲组合箱梁弯扭耦合特性的理论模型

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

Journal of Constructional Steel Research

Pub Date : 2026-01-08 DOI: 10.1016/j.jcsr.2025.110220

Chang Wei Yao , Chun Sheng Wang , Wen Ting Zhang

This study develops a novel theoretical model based on rotational shell theory for analyzing elastic bending-torsion coupling in curved composite box-girders with corrugated steel webs (CCBG-CSWs). The model incorporates key factors including initial curvature and its transverse variation, shear deformation, and the flexural contribution of the webs, with its accuracy confirmed by experimental and numerical validations. The results demonstrate that the bending-torsion coupling intensifies within specific parameter ranges: a span-to-radius ratio exceeding 0.6, a radius-to-width ratio below 10, or a bending-to-torsion stiffness ratio exceeding 10. Under centerline loading, restrained torsion warping normal stress remains below 5.0 %, with negligible shear-lag effects. Inboard eccentric loading, however, reduces coupling while increasing distortional warping stress. Compared to flat steel webs, corrugated steel webs significantly reduce flexural stiffness, primarily due to the wrinkling effect, with minimal impact on torsional stiffness. Although the increased vertical shear area offers some compensation, it is insufficient to fully restore the flexural stiffness. Furthermore, incorporating the shear deformation of corrugated steel webs increases vertical deflection by 5.3 % without significantly increasing torsional angle or normal stress. Finally, accounting for their flexural contribution further reduces normal stress by 4.5 %. In summary, this study provides a robust theoretical method and critical insights for analyzing and optimizing CCBG-CSWs.

基于旋转壳理论，建立了波纹钢腹板弯曲复合箱梁弹性弯扭耦合分析的理论模型。该模型考虑了初始曲率及其横向变化、剪切变形和腹板受弯贡献等关键因素，并通过实验和数值验证验证了模型的准确性。结果表明，在特定参数范围内，即当跨径比大于0.6、半径比小于10、弯扭刚度比大于10时，弯扭耦合会增强。在中心线加载下，约束扭转翘曲法向应力保持在5.0%以下，剪切滞后效应可以忽略不计。然而，内侧偏心加载减少了耦合，同时增加了扭曲翘曲应力。与扁平钢腹板相比，波纹钢腹板显著降低弯曲刚度，这主要是由于起皱效应，而对扭转刚度的影响最小。虽然增加的竖向剪切面积提供了一定的补偿，但不足以完全恢复抗弯刚度。此外，结合波纹钢腹板的剪切变形增加了5.3%的垂直挠度，而没有显著增加扭转角或法向应力。最后，考虑到它们的弯曲贡献，进一步降低了4.5%的正常应力。总之，本研究为CCBG-CSWs的分析和优化提供了强有力的理论方法和重要见解。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2026-01-08 DOI: 10.1016/j.jcsr.2025.110224

Yinglong Li , Faqi Liu , Jialu Ma , Shuquan Xu

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.

由于环境和意外作用，钢管混凝土柱的截面承载力可能会降低。外部约束加固方法（ecrm），如纤维增强聚合物（FRP）织物粘合和管浆约束方案，提供了实用的加固解决方案。然而，现有的计算方法通常局限于特定的截面形状或约束方案，公式复杂或缺乏普遍适用性。本文建立了不同截面（圆形、方形和矩形）和约束方案（FRP布外粘接、FRP管-灌浆围合和钢管-灌浆围合）约束钢管混凝土柱截面承载力的统一计算方法。对277个实验结果的数据库进行综合验证表明，预测精度较高，70%的预测在±13%的相对误差范围内。提出的统一框架消除了多种计算方法的需要，为工程师设计不同使用条件下的加固CFST柱提供了实用工具。

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引用次数: 0

Seismic performance of joints for a novel composite beam and cruciform thin concrete encased steel column 新型组合梁-十字形薄混凝土包钢柱节点抗震性能研究

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

Journal of Constructional Steel Research

Pub Date : 2026-01-08 DOI: 10.1016/j.jcsr.2026.110234

Xu-Ze Feng, Xue-Chun Liu, Xuesen Chen, Wei Zhou, Kun Meng

A connection for a novel composite beam and a cruciform thin concrete encased steel (TCES) column is proposed in this study. The H-shape steel skeleton of the composite beam is combined by two steels, the bottom steel is inverted T-shape, the top steel is T-shape only used for the beam bearing negative moment. The two steel members are connected at their webs by high-strength bolts. Rectangular openings are introduced in the steel web to enhance the shear interaction between the beam and slab, while also facilitating the passage of pipelines and rebars. Three full-scale specimens were tested under quasi-static loading to evaluate the effects of stud arrangement and bolt-hole size on the seismic performance of the joints. The tests investigated failure modes, crack propagation, hysteretic response, energy dissipation, stiffness degradation, and strain distribution. The results indicate that the proposed joint exhibits excellent seismic performance. Energy dissipation is achieved through flange slip and plate deformation under strong earthquakes. The rectangular web openings effectively enhance the composite action between the beam and slab. Studs on the top flange mitigate premature slab cracking, and elongated bolt holes allow slip deformation without reducing load-carrying capacity. Based on a validated finite element (FE) model, a parametric study was further performed to examine the influence of axial compression ratio, bolt number, bottom flange thickness of the cantilever beam, and composite beam configuration on joint seismic behavior. Finally, calculation formulas for yielding and ultimate moments of the joint were developed and validated, showing good agreement with both test results and FE simulations.

本文提出了一种新型组合梁与十字形薄混凝土包钢柱的连接方式。组合梁的h型钢骨架由两种钢组合而成，底部钢为倒t形，顶部钢为t形，仅用于梁承受负弯矩。这两个钢构件在腹板处由高强度螺栓连接。在钢腹板中引入矩形开口，以增强梁和板之间的剪切相互作用，同时也便于管道和钢筋的通过。在拟静力荷载作用下，对3个全尺寸试件进行了试验，以评估螺柱布置和螺栓孔尺寸对节点抗震性能的影响。试验研究了破坏模式、裂纹扩展、滞后响应、能量耗散、刚度退化和应变分布。结果表明，该节理具有良好的抗震性能。在强震作用下，通过翼缘滑移和板块变形实现能量耗散。矩形腹板开口有效地增强了梁与板之间的复合作用。顶部法兰上的螺柱可以缓解面板过早开裂，而细长的螺栓孔可以在不降低承载能力的情况下防止滑动变形。在验证的有限元模型基础上，进一步进行了参数化研究，考察了轴压比、螺栓数量、悬臂梁底部翼缘厚度和组合梁构型对节点抗震性能的影响。最后，建立了节点屈服弯矩和极限弯矩的计算公式并进行了验证，与试验结果和有限元模拟结果吻合较好。

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引用次数: 0