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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

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

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.

椭圆钢管以其良好的力学性能和建筑美观性在结构工程中得到越来越多的应用。本文通过试验和数值分析研究了偏心加载双皮椭圆钢管混凝土短柱的受力性能。系统地研究了载荷偏心、空心比、径厚比和长径比等关键参数对破坏模式、强度和延性的影响。揭示了混凝土和EST界面接触应力和纵向应力的分布机理。根据试验和分析结果，提出了考虑荷载偏心、空心比和截面特性影响的CFDEST柱偏心抗压强度的简化设计公式。结果表明：破坏表现为外EST半圆周胀形，内EST局部向内屈曲，混凝土破碎；偏心抗压强度随载荷偏心率、空心比和径厚比的增大而减小。为优化钢的强度利用率，内层EST的强度设计应低于外层EST的强度设计，为CFDEST结构在实践中的设计与实施提供了科学依据。

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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 : 2026-04-01 Epub 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

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 : 2026-04-01 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

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

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 : 2026-04-01 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

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

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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

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

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.

全球工业和基础设施的快速发展每年产生大量的建筑和拆除（C&；D）废物，这些废物大多被倾倒，因此在很大程度上恶化了环境。再生砖骨料（RBA）主要来自旧砌体结构的拆除，可以作为C&；D废物处理，但由于其强度低，吸水能力高，主要用于非结构用途。另一方面，冷弯型钢由于其易发生局部屈曲，也被用于非结构应用；然而，通过增强混凝土的承载能力和改善延性，它已经证明了它在为混凝土提供被动约束方面的效率。本研究提出了一种可持续的解决方案，通过考虑使用薄壁冷弯型钢约束的RBA混凝土短柱复合系统，利用废弃的RBA开发一种有效的低成本住房结构解决方案。在目前的调查中，对75根短柱的轴压行为进行了实验和数值研究，其中天然粗骨料（NCA）以0、30、50、70和100的不同百分比替换为RBA，考虑到M30级混凝土。试样分为无侧限和侧限试样，分别采用厚度为1mm和1.5mm、高度为300mm和500mm的冷弯唇形盒截面。实验结果表明，RBA替代NCA后，样品的性能提高了30%。将试验峰值荷载与现有规范和有限元模型进行了比较。基于实验数据和研究结果，提出了一种基于响应面法（RSM）的预测方程，适用于类似配置的峰值负荷计算。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

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

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.

本研究旨在通过优化一种新型铁基形状记忆合金剪切-摩擦混合阻尼器（FSMA-SFHD）的空间布局，提高半刚性钢框架的抗震弹性，并促进工程应用。本文提出的FSMA-SFHD将Fe-SMA剪切板与摩擦单元结合，将Fe-SMA优异的低周疲劳抗力与摩擦单元在小振幅振动下的快速响应相结合，从而在整个地震周期内实现高效的能量耗散。为了准确模拟其力学行为，基于OpenSees平台建立了FSMA-SFHD的有限元模型，并通过对比力学性能试验验证了模型的有效性。建立了综合考虑层间漂移比、楼板加速度和顶板位移的多目标性能指标，并采用保持精英遗传算法对固定阻尼器数量下的阻尼器位置进行优化。对三间十层和四间八层框架的实例研究表明，优化布局优于随机配置：优化结果表明，与随机阻尼器布置相比，所提出的方案在保持阻尼器总数的同时，显著提高了结构的峰值位移减震率和基础剪力减震率，从而有效地提高了结构的整体抗震性能。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

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

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.

矩形钢管混凝土柱以其优异的力学性能和施工效率在结构工程中得到了广泛的应用。为了解决高宽厚比构件中单腔钢管的局限性，提出了一种多腔RCFST （M-RCFST）结构，其中加劲钢板将混凝土核心分隔成多个隔室。对8个M-RCFST试件进行了拟静力试验，研究了空腔布置和轴压比对承载力、刚度、延性和耗能等关键性能指标的影响，以及破坏机制和荷载-位移响应。结果表明，增加空腔数可显著提高结构的承载力、刚度、耗能和延性。相比之下，较高的轴压比对大多数性能的影响有限，但通常会导致延性降低。在试验结果的基础上，利用ABAQUS软件建立了M-RCFST柱的准静态有限元模型，重现了观测到的破坏模式，在滞回曲线和骨架曲线上具有较好的一致性。模拟峰值荷载与试验峰值荷载的平均比值为0.966，验证了数值模型的可靠性。在此基础上，通过改变空腔数、轴压比、混凝土强度和钢强度进行了参数化研究。基于有限元结果建立了M-RCFST柱的恢复力模型，该模型能有效地反映试件的滞回响应。这些结果为M-RCFST柱抗震设计优化提供了定量依据，并为工程应用的发展提供了支持。

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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 : 2026-04-01 Epub 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

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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

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

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 (R²) exceeding 0.98 and a mean absolute percentage error (MAPE) of 5.89 %.

本研究通过有限元分析和机器学习技术研究了Fe-SMA与钢之间的粘结-螺栓混合连接（BHJs）的力学性能。系统地检查了几何和材料参数的影响，包括端部和边缘距离、粘合剂类型、螺栓直径、板厚、螺栓间距和搭接长度。同时，将bhj与纯粘结和纯螺栓连接的力学性能进行了综合比较。参数化研究表明，锚杆边距是影响锚杆极限承载能力和初始刚度的最关键因素，边距的增大导致锚杆极限承载能力和初始刚度的显著提高。螺栓直径和Fe-SMA板厚度的增加也大大提高了节点的承载能力，而这些参数本身是防止脆性破坏模式的关键控制因素。在此基础上，建立了预测bhj极限承载能力的XGBoost模型，并结合五重交叉验证和Optuna算法进行优化。改进后的XGBoost模型具有良好的预测性能，其决定系数（R2）超过0.98，平均绝对百分比误差（MAPE）为5.89%。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

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

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.

本研究以工程中常用的钢管脚手架垂直管为研究对象，建立了不同拼接条件下的垂直管模型。采用理论推导、数值模拟和实验研究相结合的方法，研究了垂直管接对其稳定性的影响规律。首先，通过理论推导，提出了考虑接头半刚性的变截面垂直管道稳定性计算方法。随后，对不同拼接方式的垂直管道进行轴压试验，并结合有限元模拟，揭示了拼接位置对垂直管道极限承载力和失稳破坏模式的影响规律。研究结果表明：垂直管道的剪接显著提高了其极限承载力，且剪接位置与剪接增强程度密切相关，最大剪接增强幅度为33.75%；此外，不同的拼接条件下，垂直管道的破坏位置也会发生变化。最后，通过实验修正，建立了考虑节点半刚性和任意位置拼接的实用计算方法。

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引用次数: 0