Journal of Constructional Steel Research最新文献_第9页

Axial-torsional testing and cyclic plasticity modelling of wire arc additively manufactured steel 线弧增材钢轴扭试验及循环塑性建模

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

Journal of Constructional Steel Research

Pub Date : 2025-12-17 DOI: 10.1016/j.jcsr.2025.110167

Eitaro Horisawa , Xin Meng , Leroy Gardner , Yasuo Kitane , Kunitomo Sugiura , Chihiro Morita

Wire arc additive manufacturing (WAAM) is a metal 3D printing technique with the potential to produce structural steel elements in a cost-effective fashion. However, there is currently a paucity of data concerning the mechanical behaviour of WAAM steel under uniaxial and multiaxial cyclic loading. This study aims to address this gap via a comprehensive experimental investigation and constitutive modelling of the multiaxial cyclic behaviour of WAAM steel. Cyclic testing featuring axial and torsional loading was conducted on WAAM Grade ER70S-6 steel, and a constitutive model to describe the multiaxial cyclic behaviour of the examined material is proposed. First, radial loading in the biaxial stress plane was conducted to identify the shape of the initial yield surface and the strain development paths of the material. Uniaxial and biaxial cyclic loading tests were performed to investigate the hardening of the material. The experimental results show that WAAM steel exhibits a von Mises isotropic yield surface, with plastic strain developing in the direction normal to the yield surface. The proposed modified two-surface plasticity model accurately reproduces both the uniaxial and multiaxial cyclic stress-strain responses, while offering improved accuracy for the multiaxial ratcheting behaviour compared with the conventional model. The results of this study show that the classical plasticity theory used for conventional steel is also applicable to WAAM steel.

电弧增材制造（WAAM）是一种金属3D打印技术，具有以经济高效的方式生产结构钢元件的潜力。然而，目前缺乏关于WAAM钢在单轴和多轴循环加载下的力学行为的数据。本研究旨在通过全面的实验研究和WAAM钢的多轴循环行为的本构模型来解决这一差距。对WAAM等级ER70S-6钢进行了轴向和扭转载荷的循环试验，提出了描述被试材料多轴循环性能的本构模型。首先，在双轴应力平面上进行径向加载，确定材料初始屈服面形状和应变发展路径；进行了单轴和双轴循环加载试验，以研究材料的硬化。实验结果表明，WAAM钢呈现出von Mises各向同性屈服面，塑性应变沿屈服面的垂直方向发展。所提出的修正双面塑性模型能准确再现单轴和多轴循环应力-应变响应，同时与传统模型相比，提高了多轴棘轮行为的精度。研究结果表明，用于常规钢的经典塑性理论同样适用于WAAM钢。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub 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

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.

为了提高钢板剪力墙（SPSW）的屈曲和轴压性能，本文提出了一种新型的波纹板加筋双层钢板剪力墙（CPS-DSPSW），该剪力墙由外钢板和波纹板组成的i型墙体单元焊接成边界柱。通过调整墙高、外板厚度、波纹板数量及布置、混凝土填充等参数，设计9个试件进行轴压试验，研究试件的轴压承载力。基于荷载等效垂直应变曲线测量不同试件的轴向性能。试验结果表明，CPS-DSPSW具有良好的轴压承载力，破坏形式为整体失稳与局部屈曲相结合。增大剪力墙的纵横比，更容易引起整体失稳，否则会发生强度破坏。随着外钢板厚度的增加，有效承载截面积增大，提高了试件的极限承载能力。波纹板的布置对其性能影响不大，不能直接抵抗轴向压缩载荷。增加壁厚和加入混凝土可显著提高轴压性能；混凝土抑制外板，限制大面积局部屈曲，提高整体稳定性。最后，将本文试验结果与平板内加筋双层钢板剪力墙抗压稳定承载设计理论进行了比较，表明该理论可为CPS-DSPSW的安全设计提供可靠依据。

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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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2025-12-13 DOI: 10.1016/j.jcsr.2025.110153

Hamed Naserirad, Yousef Hosseinzadeh

This paper presents a numerical study and development of a new bolted connection in cold-formed steel frames. An improved numerical simulation method was developed and validated against experimental data for the bolted moment connections with a through plate. The optimal geometric dimensions of the new bolted connection are determined using numerical methods to investigate the seismic performance of the proposed connection. The new bolted moment connection is semi-rigid, with a ductility ratio ranging from 3.61 to 4.39. Additionally, the damping ratio varies from 33.52 % to 37.24 % in the cycle with maximum bending moment capacity and from 35.53 % to 43.06 % in the final cycle. This connection overcomes the complexity of manufacturing double-sided through-plates and the limitations of construction in frames with more than one story.

本文对一种新型冷弯型钢框架螺栓连接方式进行了数值研究和开发。提出了一种改进的贯通板螺栓弯矩连接数值模拟方法，并与实验数据进行了对比验证。采用数值方法确定了新型螺栓连接的最佳几何尺寸，研究了该连接的抗震性能。新型螺栓弯矩连接为半刚性连接，延性比为3.61 ~ 4.39。在最大弯矩承载力周期内，阻尼比在33.52% ~ 37.24%之间，在最后一个周期内，阻尼比在35.53% ~ 43.06%之间。这种连接克服了制造双面通板的复杂性和多层框架结构的局限性。

引用次数: 0

Integrated optimization of base-isolated steel frame with semi-rigid connections 半刚性连接基础隔震钢框架的整体优化

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

Journal of Constructional Steel Research

Pub Date : 2025-12-13 DOI: 10.1016/j.jcsr.2025.110170

Haidong He , Zhan Wang , Jianrong Pan , Tulong Yin

This study proposes an integrated optimization framework for base-isolated steel frames, aiming to minimize construction cost while satisfying seismic performance criteria. A production-oriented cost model for lead rubber bearings (LRBs) was established, accompanied by a reverse-designed LRB database that correlates mechanical properties, geometric parameters, and associated production costs. Parametric studies investigated the influence of beam-to-column connection stiffness and LRB bounding mechanical properties on key seismic responses, including peak floor acceleration, inter-story drift ratio, and isolator displacement. Design variables encompass member cross-sections, connection stiffness, and LRB configurations. The adaptive particle swarm optimization algorithm was employed to achieve coordinated design optimization. Numerical case studies confirmed that the proposed optimization framework delivers cost-effective structural solutions while maintaining satisfactory seismic isolation performance.

本研究提出了一种基础隔震钢框架的综合优化框架，旨在使建筑成本最小化，同时满足抗震性能要求。建立了铅橡胶轴承（LRBs）的生产导向成本模型，并建立了一个反向设计的LRB数据库，该数据库将机械性能、几何参数和相关生产成本联系起来。参数化研究考察了梁柱连接刚度和LRB边界力学特性对关键地震反应的影响，包括峰值楼板加速度、层间位移比和隔震器位移。设计变量包括构件截面、连接刚度和LRB配置。采用自适应粒子群优化算法实现协同设计优化。数值案例研究证实，所提出的优化框架提供了具有成本效益的结构解决方案，同时保持了令人满意的隔震性能。

引用次数: 0

Compressive performance of CFSST columns with openings: Experimental, numerical investigation and design CFSST开孔柱的抗压性能：试验、数值研究与设计

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

Journal of Constructional Steel Research

Pub Date : 2025-12-13 DOI: 10.1016/j.jcsr.2025.110199

Huanxin Yuan , Siqing Wen , Kunsong He , Yongjian Wen , Peng Guo , Yu Bai

Axial compressive behaviour of concrete-filled square steel tube (CFSST) columns with transverse openings was investigated in this study, using a combined experimental and numerical approach. A total of six CFSST column specimens with varying opening configurations and steel tube thicknesses were loaded to failure under axial compression. The experimental results, including three typical failure modes, a full range of axial load versus displacement responses, and strain developments, were analysed to assess the structural behaviour of the column specimens and to clarify the effects from openings. Numerical models of CFSST columns with transverse openings were developed and validated against the obtained experimental results. A parametric study was then performed to explore the effects of the opening configuration, steel tube thickness, and the reinforcement ratio of reinforced concrete (RC) beams on the load-carrying mechanism. The experimental and numerical results were further used to evaluate the applicability of different standards including EC4, BS 5400, CECS 159 and GB 50936, revealing conservative strength estimations. To address this, a new calculation method for determining the load-carrying capacity of CFSST columns with transverse openings was proposed and compared against experimental and numerical data, demonstrating its improved accuracy. Finally, the proposed method was verified by testing two full-scale CFSST column specimens under axial compression, to present practical structural configurations and confirm the estimated results.

本研究采用实验和数值相结合的方法，研究了具有横向开口的方钢管混凝土（CFSST）柱的轴向压缩行为。在轴压作用下，共有6根不同开孔构型和钢管厚度的CFSST柱试件被加载破坏。实验结果，包括三种典型的破坏模式，全范围的轴向载荷与位移响应，以及应变发展，进行了分析，以评估柱试件的结构行为，并澄清开孔的影响。建立了具有横向开孔的CFSST柱的数值模型，并与实验结果进行了验证。然后进行了参数化研究，探讨了开口构型、钢管厚度和钢筋混凝土（RC）梁的配筋率对承载机制的影响。实验和数值结果进一步评价了EC4、BS 5400、CECS 159和GB 50936等不同标准的适用性，得出了保守的强度估计。针对这一问题，提出了一种新的确定带横向开孔CFSST柱承载能力的计算方法，并与实验数据和数值数据进行了比较，证明了该方法的准确性。最后，通过对两根CFSST柱试件进行轴压试验，验证了所提方法的有效性，给出了实际的结构形态，并验证了估算结果。

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引用次数: 0

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 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research

Pub Date : 2025-12-12 DOI: 10.1016/j.jcsr.2025.110162

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

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 (χ_cg) and ratio of inner CFST's diameter to composite column diameter (D_i/D_o, simplified as α_Di/Do), on the axial compressive behavior of circular CFST-CG short columns strengthened with UHPC jackets are analyzed. The influence mechanisms of χ_cg on failure modes, load-displacement(N-Δ) 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 χ_cg 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 χ_cg in CFST columns. The findings can be used to directly inform the evaluation and performance restoration of CFST structures with varying gap ratios.

在过去的几十年里，钢管混凝土结构普遍存在间隙缺陷，严重影响了钢管混凝土结构的承载能力和运行安全。高性能混凝土（UHPC）以其优异的抗压强度和耐久性而闻名，为CFST结构的缺陷修复提供了可行的解决方案。为研究UHPC夹套对含周向间隙缺陷圆形CFST柱的加固效果，建立了考虑缺陷特征和相互作用影响的轴向加载UHPC夹套加固圆形CFST- cg柱的有限元模型。通过已有的相关实验验证了模型的准确性。分析了间隙比（χcg）和CFST内径与复合柱径之比（Di/Do，简化为αDi/Do）等参数对经UHPC护套加固的CFST- cg圆形短柱轴压性能的影响。分析了χcg对破坏模式、荷载-位移（N-Δ）曲线、相互作用行为和应力分布的影响机制。在此基础上，建立了考虑χcg和材料参数影响的UHPC护套加固CFST-CG圆形柱极限轴向承载力计算公式。结果表明，采用UHPC护套的圆形CFST-CG短柱可以显著提高其轴压能力。然而，加固效果随着钢管混凝土柱中χcg的存在和增加而发生显著变化。研究结果可直接指导不同间隙比的钢管混凝土结构的评价和性能恢复。

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引用次数: 0

Integrating lumped damage mechanics and LSTM networks for the time-dependent reliability assessment of tubular offshore trusses under stochastic corrosion 集总损伤力学与LSTM网络相结合的海上管状桁架随机腐蚀时变可靠性评估

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

Journal of Constructional Steel Research

Pub Date : 2025-12-12 DOI: 10.1016/j.jcsr.2025.110190

Scarlet Montilla , Rúbia Bosse , Gustavo Gidrão , Ricardo Picón , André Beck , Wei Li , Julio Flórez-López

A probabilistic framework is presented for the time-dependent reliability of tubular truss structures under stochastic corrosion and deterministic wind lateral loads. The chemo-mechanical Lumped Damage Mechanics (LDM) element treats corrosion as a nodal degree of freedom and captures spatial–temporal degradation, local buckling under compression, plastic hardening in tension and counter-buckling under cycles. This physics-based model is coupled with data-driven tools: a Random Forest classifier is used to estimate limit-state exceedance in order to generate fragility curves, and an LSTM network is used to forecast node-level damage trajectories. An offshore truss case study involving 8800 simulations yields 666,578 sequences for training purposes, demonstrating widespread moderate damage without collapse and identifying critical members. It also shows that corrosion amplifies both capacity loss and uncertainty over service life. This hybrid framework offers a computationally efficient and scalable lifecycle assessment, supporting risk-informed inspection and maintenance in challenging marine environments.

提出了管状桁架结构在随机腐蚀和确定性风侧荷载作用下的时变可靠度的概率框架。化学-机械集总损伤力学（LDM）单元将腐蚀视为一个节点自由度，并捕获时空退化、压缩下的局部屈曲、拉伸下的塑性硬化和循环下的反屈曲。这种基于物理的模型与数据驱动的工具相结合：随机森林分类器用于估计极限状态超越，以生成易损性曲线，LSTM网络用于预测节点级损伤轨迹。海上桁架案例研究涉及8800个模拟，产生666,578个序列，用于培训目的，展示了广泛的中度损坏而没有倒塌，并确定了关键成员。它还表明，腐蚀放大了容量损失和使用寿命的不确定性。这种混合框架提供了计算效率高、可扩展的生命周期评估，支持在充满挑战的海洋环境中进行风险检测和维护。

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引用次数: 0

Fire resistance study and design method of axial restrained Q460GJ steel columns 轴向约束Q460GJ钢柱耐火性能研究及设计方法

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

Journal of Constructional Steel Research

Pub Date : 2025-12-12 DOI: 10.1016/j.jcsr.2025.110186

Ziqi Wang , Aibing Li , Weiyong Wang

Fire performance of steel columns in real structures is influenced by end restraints and differs from that of isolated members. This paper reports a thorough experimental and numerical study of the fire resistance of Q460GJ welded H-shaped steel columns with axial restraint. A total of 6 columns were fabricated for this test, comprising two distinct configurations, with variations in parameters: slenderness ratio, load ratio, and restraint stiffness ratio. The results indicated that all the parameters have a significant impact on the restraining reaction force, subsequently affecting the fire resistance. The restrained columns with smaller slenderness ratios exhibited higher critical temperatures, with a maximum difference reaching 24.3 %. The critical temperatures decreased as the load ratio increased, with a maximum difference reaching 32.9 %, and decreased as the axial restraint stiffness ratio increased, with a difference of 10.0 %. The coupled effect of the three parameters: slenderness ratio, load ratio, and restraint stiffness ratio, was studied by conducting finite element parametric analysis. A design method was proposed by a multiple nonlinear regression analysis considering the individual effects of parameters and the influence of the second-order interaction terms. The proposed design method can accurately predict the critical temperature of axially restrained Q460GJ steel columns.

钢柱在实际结构中的防火性能受端部约束的影响，与孤立构件的防火性能不同。本文对具有轴向约束的Q460GJ焊接h型钢柱的耐火性能进行了深入的试验和数值研究。本次试验共制作了6根柱，包括两种不同的配置，参数变化：长细比、载荷比和约束刚度比。结果表明，各参数对抑制反作用力均有显著影响，进而影响耐火性能。长细比越小的约束柱的临界温度越高，最大温差达24.3%。临界温度随载荷比的增大而减小，最大差异达32.9%；随轴向约束刚度比的增大而减小，最大差异达10.0%。通过有限元参数分析，研究了长细比、载荷比、约束刚度比三个参数的耦合效应。通过多元非线性回归分析，提出了一种考虑参数个体效应和二阶交互项影响的设计方法。所提出的设计方法能够准确地预测轴向约束Q460GJ钢柱的临界温度。

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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 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