Journal of Constructional Steel Research最新文献_第6页

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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2025-12-11 DOI: 10.1016/j.jcsr.2025.110192

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

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.

火灾修复后的钢框架在极端荷载作用下的倒塌行为与环境条件下有显著差异。在这项研究中，使用扩展端板连接的钢梁柱组件最初暴露于火中。冷却至环境温度后，采用三种强化策略对结构进行改造。随后，进行了突除柱试验，以评估火灾后的动力性能；随后进行了准静态压下试验，以确定动力作用减弱后的残余抗倒塌能力。然后使用实验阻力函数来校准用于预测动态极限载荷的改进单自由度（SDOF）模型。结果表明：虽然强化对动态阶段节点中间最大位移影响不大，但通过重新分配荷载路径和保持整个变形过程的连续参与，有效减小了稳定阶段节点的残余位移；所有强化策略均能提高火灾后试件的初始刚度，但效果仅限于小变形；在第一次载荷下降后，阻力迅速恶化，揭示了强化机制的内在局限性。中柱响应得到的动刚度与下压试验得到的初始刚度基本一致，说明在SDOF模型中使用残差试验数据是合理的。总体而言，焊缝周长强化在所有强化策略中表现出最有效的强化效果。

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引用次数: 0

Numerical investigation on seismic performance of prefabricated self-centering RC beam-CFDST column joints 预制自定心RC梁- cfdst柱节点抗震性能数值研究

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

Journal of Constructional Steel Research

Pub Date : 2025-12-11 DOI: 10.1016/j.jcsr.2025.110198

Xueyuan Yan , Jitao Yu , Genliang Wang , Wenhui Chen , Shen Shi , Bo Pan , Jie Zheng

Self-centering joints, owing to their post-earthquake recovery capacity, enable structures to exhibit higher seismic resilience. Prestressed strands are a commonly used method to achieve the self-centering function of joints; however, they currently rely largely on on-site tensioning, and mutual constraints exist between adjacent joints, which is unfavorable for the rapid repair and functional recovery of structures after earthquakes. Prefabricated methods provide an effective solution to this problem. This paper investigates the seismic performance of prefabricated self-centering (PSC) RC beam–CFDST column joints, in which the energy dissipation is achieved through web friction devices, while self-centering capability is provided by prestressed strands. Based on experimental results, a finite element model was established and validated, and on this basis, a parameter analysis was conducted to examine the impact of strand diameter, strand prestress, friction force, strand spacing, and length of the external I-beam on the PSC joints' seismic behavior. Moreover, the working mechanism of PSC joints was investigated, and the mechanical behavior of the beam–column interface under cyclic loading was analyzed. Accordingly, a theoretical hysteretic model based on the interface mechanical behavior was established, and its prediction accuracy was verified against experimental results. The results indicate that different parameters exert varying degrees of influence on the initial stiffness, load-bearing capacity, energy dissipation capacity, and self-centering ability of PSC joints. The proposed theoretical hysteretic model can effectively predict the joints' hysteretic characteristics, with the error between theoretical and experimental values of the interface moment controlled within 10 %.

自定心节点由于具有震后恢复能力，使结构具有较高的抗震能力。预应力筋是实现节点自定心功能的常用方法；但目前主要依靠现场张拉，相邻节点之间存在相互约束，不利于震后结构的快速修复和功能恢复。预制方法为解决这一问题提供了有效的方法。本文研究了预制自定心RC梁- cfdst柱节点的抗震性能，该节点通过腹板摩擦装置实现耗能，而自定心能力则由预应力链提供。在试验结果的基础上，建立并验证了有限元模型，在此基础上进行了参数分析，考察了钢绞线直径、钢绞线预应力、摩擦力、钢绞线间距和外工字梁长度对PSC节点抗震性能的影响。研究了PSC节点的工作机理，分析了循环荷载作用下的梁柱界面力学行为。据此，建立了基于界面力学行为的理论滞回模型，并与实验结果对比验证了模型的预测精度。结果表明，不同参数对PSC节点的初始刚度、承载能力、耗能能力和自定心能力均有不同程度的影响。所建立的理论滞回模型能有效地预测关节的滞回特性，界面弯矩的理论值与实验值的误差控制在10%以内。

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引用次数: 0

Scale-dependent strain rate sensitivity constitutive model and fracture damage prediction for DP600 DP600尺度相关应变率敏感性本构模型及断裂损伤预测

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

Journal of Constructional Steel Research

Pub Date : 2025-12-11 DOI: 10.1016/j.jcsr.2025.110168

Guoxi Jing , Jiahao Jia , Guang Chen , Xinyu Zheng , Yafei Fu , Pengsai Zhang

DP600, widely used in critical structural components like building steel beams due to its excellent seismic and impact resistance, requires accurate prediction of its plastic and fracture behavior under impact loading for building safety. This study integrates quasi-static/dynamic uniaxial tensile experiments with finite element analysis (FEA) under an uncoupled damage mechanics framework to characterize DP600's post-necking plastic deformation across strain rates and predict its sudden fracture. A strain rate-dependent weighted Ludwik-Voce (SLV) constitutive model is developed, which precisely calibrates post-necking true stress-plastic strain relationships, captures the distinct hardening mechanisms of martensite/ferrite, and reflects strain rate sensitivity. To reveal the correlation between fracture behavior and the evolution of stress state and strain path, a multi-dimensional analysis is conducted by employing the Rice–Tracey model to quantify the effect of stress triaxiality on microvoid evolution and the strain rate-dependent fracture forming limit diagram (SFFLD) to depict non-linear strain-path evolution in the major–minor plane strain space. This method achieves over 97 % agreement between FEA and experimental results for DP600's tensile fracture prediction under different strain rates. Additionally, correlation analysis between equivalent plastic strain (PEEQ) and damage variables quantitatively reveals the intrinsic relationship between damage accumulation and plastic strain development.

DP600由于具有优异的抗震和抗冲击性能，广泛应用于建筑钢梁等关键结构构件，为了建筑安全，需要准确预测其在冲击载荷下的塑性和断裂行为。本研究将准静态/动态单轴拉伸实验与非耦合损伤力学框架下的有限元分析（FEA）相结合，以表征DP600在不同应变速率下的颈后塑性变形，并预测其突然断裂。建立了应变速率相关的加权Ludwik-Voce （SLV）本构模型，该模型精确地校准了颈缩后的真应力-塑性应变关系，捕捉了马氏体/铁素体的不同硬化机制，并反映了应变速率敏感性。为了揭示断裂行为与应力状态和应变路径演化的相关性，采用Rice-Tracey模型进行了多维分析，量化了应力三轴性对微孔隙演化的影响，并采用应变率相关的断裂形成极限图（SFFLD）描述了主-小平面应变空间的非线性应变路径演化。该方法对不同应变速率下DP600的拉伸断裂预测结果与有限元分析结果的符合率达到97%以上。通过等效塑性应变（PEEQ）与损伤变量的相关性分析，定量揭示了损伤积累与塑性应变发展之间的内在联系。

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引用次数: 0

Fire performance of end-restrained circular steel tube confined reinforced concrete columns 端部约束圆形钢管约束钢筋混凝土柱的防火性能

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

Journal of Constructional Steel Research

Pub Date : 2025-12-11 DOI: 10.1016/j.jcsr.2025.110187

Bochi Duan , Dongdong Yang , Faqi Liu , Hua Yang , Yong Zhu

Structural fire safety is an essential concern in the design of steel tube confined reinforced concrete (STCRC) column, an innovative type of steel-concrete composite structural member. While extensive research has been conducted and design methods are available for the fire behaviour of circular STCRC columns with pinned conditions, the fire performance of these columns with end restraints, particularly considering varying end restraints with time increasing (hereafter referred to as time-dependent restraints), remains underexplored. This study, for the first time, investigates the fire performance of circular STCRC columns in non-sway frames with end restraints via finite element analysis (FEA). The investigation covers various scenarios, including axial and rotational restraints (individually and in combination), and constant and time-dependent conditions. The effects of axial restraint ratio, rotational restraint ratio, load ratio, cross-sectional diameter, and slenderness ratio on the fire resistance of end-restrained circular STCRC columns were examined. It was observed that an increase in restraint stiffness, whether axial or rotational, markedly enhances the column's fire resistance, with improvements reaching up to 830 %. Quantitative analyses were conducted to compare the fire behaviour of columns with time-dependent restraints resulting from the stiffness degradation of adjacent beams to those with constant restraints. The cumulative negative effect of time-dependent restraints on fire resistance is generally negligible. Based on existing methods for pin-ended STCRC columns, this study develops fire resistance design recommendations for end-restrained circular STCRC columns, accounting for the beneficial effects and time-dependent degradation of end restraints on the failure axial force and buckling length.

钢管约束钢筋混凝土柱是一种新型钢-混凝土组合构件，其结构防火安全是设计中必须考虑的问题。虽然已经进行了广泛的研究，并且设计方法可用于固定条件下的圆形STCRC柱的火灾行为，但这些具有端部约束的柱的火灾性能，特别是考虑到随着时间增加而变化的端部约束（以下称为时间相关约束），仍未得到充分探索。本研究首次通过有限元分析（FEA）研究了具有端部约束的非摇摆框架中圆形STCRC柱的防火性能。研究涵盖了各种情况，包括轴向和旋转约束（单独和组合），以及恒定和时间相关的条件。研究了轴向约束比、旋转约束比、荷载比、截面直径和长细比对端约束圆形STCRC柱耐火性能的影响。据观察，约束刚度的增加，无论是轴向还是旋转，显著提高了柱的耐火性能，提高幅度高达830%。定量分析进行了比较柱的火灾行为与时间相关的约束，导致相邻梁的刚度退化与那些恒定的约束。时间依赖性约束对耐火性能的累积负面影响通常可以忽略不计。基于现有的钉端STCRC柱的设计方法，本研究提出了端部约束圆形STCRC柱的耐火设计建议，考虑了端部约束对破坏轴力和屈曲长度的有益影响和随时间的退化。

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引用次数: 0

Corrigendum to Axial compression behaviours of UHPC-filled stainless steel tubes at cold-region low temperatures [Journal of Constructional Steel Research Volume 235, December 2025, 109813] 低温下uhpc填充不锈钢管轴向压缩性能的勘误表[j] . construction steel Research Volume 235, December 2025, 109813。

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

Journal of Constructional Steel Research

Pub Date : 2025-12-10 DOI: 10.1016/j.jcsr.2025.110194

Jia-Bao Yan , Yixuan Wang , Yunbiao Luo , Zirui Wang , Zhe Wang

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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub 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

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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2025-12-09 DOI: 10.1016/j.jcsr.2025.110163

Isidora Jakovljević, Jelena Dobrić, Nina Gluhović, Milan Spremić

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.

本文通过引入一种创新的抗弯矩钢框架的梁柱节点，提出了可重复使用的建筑实践。提议的接头，具有t型桩和cleats，是完全可拆卸的，采用螺栓连接而不是焊接。此外，它的设计是为了容纳再生钢，结合一个可适应的连接，延长现有成员的使用长度，并调整它们以适应新结构所需的跨度。对3个试件进行试验测试，评估节点性能，识别节点破坏模式、弯矩抗力、转动能力和刚度。测试了两种连接形式，分别改变了t形短段的截面和t形短段腹板到梁的法兰连接上的螺栓数量。此外，通过两个具有相同结构的试样，研究了材料来源（再生钢与新钢）的影响。试验发现了两种破坏模式：t形腹板螺栓孔的承载变形和柱翼缘第一排螺栓的破坏。结果还强调了螺栓抗滑移在t型短板-梁法兰连接中对控制旋转刚度的关键作用。建立了有限元模型，并根据实验结果进行了验证，以模拟节点的力学行为。参数化数值研究探讨了关键的设计变量，包括连杆长度、螺栓直径和螺栓数量。研究结果有助于提高节点的结构性能，增加节点的阻力，延缓节点的刚度退化。结果表明，将连接长度从100 mm增加到150 mm对连接性能没有负面影响。

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引用次数: 0

Equivalent elastic-plastic model of horizontally CSPSW used in structural design 水平CSPSW等效弹塑性模型在结构设计中的应用

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

Journal of Constructional Steel Research

Pub Date : 2025-12-09 DOI: 10.1016/j.jcsr.2025.110185

Bo-Li Zhu , Wen-Cong Liu , Hong-Wei Shan , Xiao-Dong Wang , Yan-Lin Guo

This paper studies the elastic-plastic performance of horizontally corrugated steel plate shear wall (HCSPSW) under shear force and proposes an elastic-plastic equivalent simplified calculation model for HCSPSW. Firstly, a refined finite element model of the HCSPSW is adopted for its elastic-plastic analysis to numerically obtain the shear performance skeleton curve that could reflect local and global buckling behaviors. Based on the refined FE numerical results from the shear load-displacement curves of the HCSPSW, the initial stiffness, ultimate shear-bearing stability coefficient φ and residual shear-bearing stability coefficient φ_r on the shear skeleton curves of HCSPSW are estimated and established according to varying regularized aspect ratio λ_n. In particular, key design parameters of the shear skeleton curves were predicted with continuously varying regularized aspect ratio λ_n. Subsequently an equivalent simplified calculation model of the HCSPSW for its elastic-plastic analysis and design was established based proximately on the same shear load displacement curve obtained from the refined FE model in estimating its elastic-plastic performance. Finally, by introducing a three-storey and three-span frame-HCSPSW structural model for push-over analysis, a comparison of the full-process push-over curves between the equivalent model and the refined FE model was carried out. It was demonstrated that the equivalent model can effectively predict the initial stiffness, ultimate shear-bearing capacity, and residual shear-bearing capacity of the HCSPSW. Therefore, as an equivalent elastic-plastic model for completing preliminary structural design of HCSPSWs embedded in frames, its shear skeleton curve could can be used directly.

研究了水平波纹钢板剪力墙在剪力作用下的弹塑性性能，提出了水平波纹钢板剪力墙弹塑性等效简化计算模型。首先，采用精细化有限元模型对其进行弹塑性分析，数值得到反映局部和全局屈曲行为的剪切性能骨架曲线；基于HCSPSW剪切荷载-位移曲线的精细化有限元计算结果，根据不同的正则化长径比λn，估计并建立了HCSPSW剪切骨架曲线上的初始刚度、极限剪切-承载稳定系数φ和残余剪切-承载稳定系数φr。特别地，用连续变化的正则化纵横比λn来预测剪切骨架曲线的关键设计参数。在此基础上，基于精化有限元模型得到的相同剪切载荷位移曲线，建立了等效简化计算模型，对其进行弹塑性分析和设计。最后，通过引入三层三跨框架- hcspsw结构模型进行推覆分析，对比了等效模型与精化有限元模型的全过程推覆曲线。结果表明，该等效模型能够有效地预测HCSPSW的初始刚度、极限剪切承载力和剩余剪切承载力。因此，其剪力骨架曲线可直接作为框架内嵌式混凝土梁的等效弹塑性模型来完成结构初步设计。

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引用次数: 0

Ultra-low-cycle-fatigue prediction of LY225 steel using an improved Lode parameter enhanced cyclic-void-growth-model 基于改进Lode参数增强循环-空洞-生长模型的LY225钢超低周疲劳预测

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

Journal of Constructional Steel Research

Pub Date : 2025-12-09 DOI: 10.1016/j.jcsr.2025.110165

Xuewei Huang, Yihao Shen, Zeru Liu, Jun Zhao, Xu Zhang

This study conducted monotonic tensile and ultra-low-cycle-fatigue tests on LY225 low-yield strength steel under different stress states. Experimental results show that ultra-low cyclic loading yields a higher ultimate load than monotonic tension. The steel exhibits obvious cyclic hardening behavior, which becomes more pronounced with increasing strain amplitude. The notched plate specimens exhibit ductile dimple features under ultra-low cyclic loading. The Lode parameter enhanced cyclic void growth model (LCVGM) was employed to analyze the fracture behavior of the specimens. The model accurately reproduces the fracture response of LY225 steel specimens subjected to monotonic tension, however, it fails to accurately predict the ultra-low-cycle-fatigue life under constant-amplitude symmetric loading. To address this limitation, an improved Lode parameter enhanced cyclic void growth model (ILCVGM) was developed by modifying the damage evolution law in the LCVGM, which could better capture damage evolution under large compressive strains. The ILCVGM parameters were calibrated using ultra-low-cycle-fatigue test data of LY225 steel, followed by a comparative analysis of void evolution mechanisms in the ILCVGM and LCVGM. The ILCVGM was applied to simulate ultra-low-cycle-fatigue failure of LY225 steel notched plate specimens under different loading protocols. The predicted fatigue life closely matches the experimental data, validating the effectiveness of the ILCVGM in predicting and analyzing ultra-low-cycle-fatigue fracture.

对LY225低屈服强度钢在不同应力状态下进行了单调拉伸和超低周疲劳试验。试验结果表明，超低循环加载比单调拉伸产生更高的极限荷载。钢表现出明显的循环硬化行为，随应变幅值的增加循环硬化行为更加明显。缺口板试样在超低循环荷载作用下表现出延性韧窝特征。采用Lode参数增强循环空隙生长模型（LCVGM）对试件的断裂行为进行分析。该模型能较准确地再现LY225钢试件在单调拉伸作用下的断裂响应，但不能准确预测等幅对称加载下的超低周疲劳寿命。针对这一缺陷，通过修改Lode参数增强循环空洞增长模型（ILCVGM）中的损伤演化规律，建立了改进的Lode参数增强循环空洞增长模型（ILCVGM），该模型能够更好地捕捉大压缩应变下的损伤演化。利用LY225钢的超低周疲劳试验数据对ILCVGM参数进行了标定，并对比分析了ILCVGM和LCVGM的空洞演化机制。采用ILCVGM模拟了不同加载方案下LY225钢缺口板试件的超低周疲劳破坏。预测疲劳寿命与实验数据吻合较好，验证了ILCVGM在超低周疲劳断裂预测分析中的有效性。

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引用次数: 0

Axial compression behavior of corner-stiffened concrete-filled double-skin steel tubular (CFDST) members: Experimental and analytical research 角加筋双层钢管混凝土（CFDST）构件轴压性能：试验与分析研究

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

Journal of Constructional Steel Research

Pub Date : 2025-12-08 DOI: 10.1016/j.jcsr.2025.110164

Jian-Tao Wang, Kai-Lin Yang, Yang Yang, Zu-Qiang Liu, Juan Wang

Traditional square concrete-filled double-skin steel tubular (CFDST) member inevitably has the limitation of stress concentration at the steel tube corners, making it difficult to meet the development needs of heavy-load structures. This paper proposed a new-type corner-stiffened CFDST members for the potential application in the towers or piers of long-span bridges. An axial compression test was conduct to investigate its compressive behavior, where the failure mode involved the inward buckling of inner steel tube, outward buckling of flat steel plate and corner steel tube, and the concrete crushing. A finite element (FE) model was verified in terms of the failure mode, full-range load-displacement curve and maximum bearing capacity, for the further mechanism analysis and parametric study. Mechanism investigation reflects that: the reinforcement of corner concrete-filled steel tubular (CFST) members intensifies the confining stress between the corner concrete and corner steel tube within the reinforced zone; the flat steel plate and inner steel tube function independently, without generating substantial confining stress. Parametric study on material-geometric parameters reveals that: inner steel tube strength (f_yi) has a slight effect on the compressive capacity, e.g., the bearing capacity respectively improves by 1.85 % and 2.98 % as f_yi increases from 355 MPa to 460 MPa and 550 MPa; inner steel tube strength, diameter-to-thickness ratio of inner steel tube, and hollow ratio slightly affect the confining stress of the corner CFST component. Finally, the calculation method was established and validated for predicting the compressive capacity of corner-stiffened CFDST members.

传统的方形双皮钢管混凝土（CFDST）构件不可避免地存在应力集中在钢管角部的局限性，难以满足大荷载结构发展的需要。本文提出了一种新型角加劲CFDST构件，具有应用于大跨度桥梁塔架或桥墩的潜力。通过轴压试验研究其抗压特性，破坏模式为内钢管向内屈曲，扁钢板和角钢管向外屈曲，混凝土破碎。从破坏模式、全范围载荷-位移曲线和最大承载能力等方面对有限元模型进行了验证，为进一步的机理分析和参数化研究奠定了基础。机理研究表明：角部钢管混凝土（CFST）构件的加固加剧了钢筋区域内角部混凝土与角部钢管之间的围应力；扁钢板与内钢管独立工作，不产生较大的围应力。材料几何参数的参数化研究表明：钢管内强度（fyi）对抗压能力影响较小，当fyi从355 MPa增加到460 MPa和550 MPa时，承载力分别提高1.85%和2.98%；内钢管强度、内钢管径厚比和空心比对拐角CFST构件的围应力影响较小。最后，建立了角加筋CFDST构件抗压能力预测的计算方法，并进行了验证。

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引用次数: 0