钢管混凝土格构柱-组合箱梁节点抗震性能试验研究

发布时间：2018-05-30 17:33

本文选题：巨型组合结构 + 钢管混凝土　；参考：《振动与冲击》2014年18期

【摘要】：为验证巨型组合结构体系中钢管混凝土格构柱-组合箱梁节点的破坏特征和抗震性能,进行了节点核心区连接分别为单肢斜撑、交叉斜撑和横隔板三种不同连接构造形式的节点低周反复循环加载试验。分析了各节点形式的荷载-位移滞回曲线和骨架曲线及评价节点抗震性能的主要参数(承载力、延性、刚度退化规律、耗能指数和等效粘滞系数等)。同时,利用ABAQUS对各节点进行了有限元数值计算,并与试验结果进行对比分析进一步对组合节点进行了研究。结果表明:试验与有限元数值计算结果吻合良好,验证了理论分析的正确性;三种不同连接构造形式的节点试件正向具有良好的位移延性,但反向位移延性不及正向,随着节点连接方式的加强,节点的屈服位移逐渐减小,延性增大,节点承载能力逐渐增大。横隔板连接形式节点相对另两种连接构造耗能能力较好,改善了节点的抗震性能。
[Abstract]:In order to verify the failure characteristics and seismic behavior of concrete-filled steel tubular lattice column-composite box girder joints in giant composite structure systems, the core zone connections of the joints are respectively single-leg oblique braces. The low cycle cyclic loading test of the joints with three different connection forms: cross bracing and cross diaphragm. The load-displacement hysteretic curves and skeleton curves of each joint and the main parameters (bearing capacity, ductility, stiffness degradation law, energy dissipation index and equivalent viscosity coefficient) for evaluating the seismic performance of joints are analyzed. At the same time, the finite element numerical calculation of each node is carried out by using ABAQUS, and the results are compared with the experimental results, and the combined joints are further studied. The results show that the experimental results are in good agreement with the numerical results of finite element method, which verifies the correctness of the theoretical analysis, and the forward displacement ductility of the nodal specimens with three different connection structures is good, but the reverse displacement ductility is not as good as the forward displacement ductility. With the strengthening of the connection mode, the yield displacement of the joint decreases gradually, the ductility increases, and the bearing capacity of the node increases. Compared with the other two kinds of connections, the energy dissipation capacity of the joints in the form of transverse diaphragm connections is better, and the seismic performance of the joints is improved.
【作者单位】：中南大学土木工程学院;湖南省有色地质勘查研究院;
【基金】：国家自然科学基金(51078355,50938008,51378502) 中央高校基本科研业务费专项基金项目(20117Q008) 国家十二五科技支撑计划项目(2011BAJ09B02) 湖南省研究生科研创新项目(CX2012B060)
【分类号】：TU398.9

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