复式钢管混凝土钢梁节点设计方法及节点性能控制研究

This project intends to systematically study the connections between CFTST columns and steel beams and to form the joints design method of CFTST structures. Some new connections，such as external stiffening diaphragm joint and improved vertical stiffener joint, will be designed to fit for the engineering characteristic of CFTST structures. The mechanical behaviors including of bearing capacity and transferring mechanism will be researched by static and quasi-static tests. And connections with enough strength and good ductility should be designed into engineering applications to meet the seismic design requirements. Then，behavior control research of all connections will be conducted by the theory research，a large number of tests and accurate nonlinear finite element analysis. Further study should include the determination and computation of indexes representing the joint behavior，the establishment of classification criteria for all connections and the foundation of design method considering global and local structural interactions. Eventually performance-based design theory for CFTST structures should be presented.

本项目拟系统研究复式钢管混凝土钢梁节点的受力性能，解决复式钢管混凝土柱与钢梁连接节点的基本理论问题，形成实用的复式钢管混凝土钢梁节点设计方法。设计新型的外隔板节点及改进的竖向肋板钢梁节点等适用于复式钢管混凝土结构的钢梁节点构造形式，进行节点力学性能静力和低周反复荷载试验，分析各节点的工作机理和受力性能，确定有足够的强度、良好的延性、满足抗震设计要求的节点构造，以满足工程应用需要；最后结合理论研究、大量的节点试验结果和准确的非线性有限元分析，对节点进行性能控制研究，包括节点性能指标的确定和计算、节点分类准则的建立和考虑结构整体与局部相关性的设计方法等内容，最终形成复式钢管混凝土钢梁节点性能化设计理论。

本项目系统研究了复式钢管混凝土钢梁节点的受力性能，解决复式钢管混凝土柱与钢梁连接节点的基本理论问题，形成了实用了复式钢管混凝土钢梁节点设计方法。设计了适用于复式钢管混凝土柱-钢梁的四种类型节点，包括竖向肋板节点、外加强环板节点、钢梁半穿心加腋型节点及单边螺栓端板连接装配式节点构造形式，均进行了低周反复荷载试验，分析了各节点的工作机理和受力性能，确定有足够的强度、良好的延性、满足抗震设计要求的节点构造，以满足工程应用需要; 最后结合理论研究、节点试验结果和准确的非线性有限元分析，对节点进行了性能控制研究，包括节点性能指标的确定和计算、节点分类准则的建立和考虑结构整体与局部相关性的设计方法等内容，形成了复式钢管混凝土钢梁节点性能化设计理论。