为消除钢管与混凝土可能产生的脱粘或脱空对钢管混凝土节点受力性能尤其是抗震性能的影响，提出了一种新型的PBL加劲型方钢管混凝土柱-H型钢梁框架外隔板式节点。其中，PBL 纵肋不仅直接参与纵向受力、加劲钢管、增强钢管与混凝土的组合作用；而且能参与和改善节点的传力，缓解地震作用下节点区域柱角钢管和隔板的应力集中，防止钢管的屈曲和焊缝的拉裂。因此，新型节点应具有优越的抗震性能。.本项目拟通过模型试验、数值模拟、理论分析相结合的研究手段，以PBL纵肋对节点力学性能的影响为核心，对新型节点的抗震性能展开系统地研究，主要包括：研究各设计参数对节点抗震性能的影响，研究节点的传力机理，建立节点抗弯承载力、抗剪承载力计算模型，提出节点合理的构造形式。项目的研究对丰富和发展钢管混凝土节点的形式、完善钢管混凝土结构相关规范具有重要的工程价值，对完善钢管混凝土结构理论具有重要的学术意义。

To eliminate possible effects of debonding or hollowing between steel tube and concrete on mechanical behavior (especially seismic behavior) of connections, a new type of exterior-diaphragm connection between CFSSTCs stiffened with PBL and H-shaped steel beams is developed. The PBL not only transfers longitudinal stress, works as steel tube stiffener, enhances the combination of steel tube and concrete core; but also transfers forces of the steel beam to the steel tube and concrete core uniformly avoiding stress concentration in steel tube corners and diaphragms under earthquakes. So, that type of connection should have excellent seismic behavior. .This project will conduct a comprehensive research on the seismic properties of exterior-diaphragm connections between CFSSTCs stiffened with PBL and H-shaped steel beams, through tests, numerical simulation and theoretical analysis. The key point of the research is to find out the effects of PBL on mechanical behavior of the connections. The main research topics are to study effects of design parameters on the behavior of the connections, study the force-transmission mechanism of the connections, and put forward reasonable structural form of the connections. Results from this project develop a new type of CFST connection, provide theoretical basis for improving the theory of CFST structures. So, the project are both valuable in academic and engineering.