带支撑的钢管混凝土柱节点及其框架体系抗震性能研究

目前国家大力推动钢结构和组合结构的发展以及智能装配式住宅建筑，钢管混凝土结构在抗震性能、经济效益、节能环保、集成装配化等方面存在巨大优势。然目前多用于筒中筒、框筒等超高层结构体系，对于中高层的普通住宅或公共建筑，常用钢筋混凝土结构，而带支撑的钢管混凝土柱框架体系则应用较少。国内外对其深入研究显得相对滞后，研究成果也比较薄弱，日本基本没有公开其研究成果，且存在一些重要的科学问题没有解决，这在一定程度上制约了此高性能组合结构体系的推广。.本项目以带支撑的钢管混凝土柱框架体系为研究对象，应用最优预测元模型量化节点参数敏感性，采用理论计算、数值分析和试验研究相结合的方法，对带支撑的钢管混凝土柱系列节点进行抗震性能研究，探讨组合节点转动约束刚度；应用结构多尺度力学方法，建立组合框架体系精细有限元模型和试验模型，进行带支撑的组合框架体系抗震性能分析，为完善组合结构体系设计标准提供参考。

The development of steel structure and composite structure, and smart prefabricating housing building is vigorously promoted in our country. Concrete-filled tube (CFT) structure has significant advantages in seismic behavior, economic benefits, environment protecting, integrated assembly and so on. But it is generally used for tube-in-tube, frame-tube and so on high-rise structure system. For mid-rise and high-rise common houses and public buildings, reinforced concrete structure is typically used. However, braced frame system with CFT columns is used less. The in-depth study is relatively backward at home and abroad. The research results are relatively weak. The research achievements of Japan have not been made public and some significant scientific problems have not been resolved. To some extent, the promotion of composite structure system with high performance has been restricted..In this project, braced frame system with CFT columns is the main study objects. Using optimal prediction metamodel to quantify the sensitivities of the connection parameters, the seismic performance and the rotational stiffness of the braced frame connections with CFT columns will be analyzed and evaluated by the method that combines theoretical calculation, numerical analysis and experimental research. The seismic performance of the whole frame will be analyzed through structural multi-scale mechanics of structures method and fine finite element model and test scale model of the composite framework to provide reference for composite structure system design standards.