T形钢管混凝土柱框架节点抗震性能研究

项目名称： T形钢管混凝土柱框架节点抗震性能研究

项目编号： No.51208241

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 杨远龙

作者单位： 兰州大学

项目金额： 28万元

中文摘要： 异形柱框架结构能够有效解决普通方矩形柱框架结构室内柱角外露的不足，改善室内环境观瞻，提高室内空间使用效率。普遍应用的异形钢筋混凝土柱由于柱肢较薄，对节点抗剪承载力不利，限制了其在高设防烈度地区的应用，相同设防烈度下房屋最大高度也远远小于普通框架结构。异形钢管混凝土柱框架节点凭借钢和混凝土的组合效应能够有效改善节点抗震性能，目前研究尚处于起步阶段。本项目将进行T形钢管混凝土柱框架节点的抗震性能试验，研究节点的受力机理、破坏模式和力学性能指标，考察轴压比、腹板肢长、钢管含钢率、混凝土强度等级等参数对节点抗震性能的影响规律，评价节点抗震性能的优势和不足。在试验研究基础上，进行节点有限元建模计算，并进行相关参数影响分析，提出节点抗剪承载力简化计算公式和节点低周往复加载恢复力模型，并给出工程应用设计方法。

中文关键词： 异形钢管混凝土柱；框架节点；抗震性能；数值分析；设计方法

英文摘要： Special-shaped column frame structures can overcome shortage of column convex corner exposed to the indoor space which is prevalent in traditional square and rectangular column frame structures. Accordingly, special-shaped column frame structures improve residential indoor architectural environment and boost indoor serviceable space efficiency. However, the prevalently applied special-shaped reinforced concrete column has thin section components, which leads negative effects on joint shear resistance and hampers its further generalization and application in high seismic fortification zones and decreases its maximum applicable building height. Special-shaped concrete-filled steel tubular column frame joint has good seismic behavior by providing combination effect of concrete and steel. However, the joint is still in its infancy and needs further comprehensive research. This project plan includes experimental research in seismic behavior of T-shaped concrete-filled steel tubular column frame joints. Load transmission mechanism, failure mode and mechanical property index are studied. Parameters of axial compressive load ratio, web cross sectional height, steel ratio of T-shaped tube, and concrete strength grade are considered to investigate their influencing rule in joints' seismic behavior. Advantages and disadvan

英文关键词： special-shaped CFST column；frame joint；seismic behavior；numerical analysis；design method