中文摘要：

在混合桥塔、混合梁以及混合拱等新型组合结构中,需通过剪力连接件群在有限长度的钢-混凝土连接段内实现较大的荷载传递。该类结构对于设计理念、分析理论与计算方法提出新挑战,同时也对剪力连接件本身提出更高要求。根据PBL剪力连接件的受力特性,基于钢构件与混凝土构件的层间相对滑移和各层剪力连接件所承担荷载之间的关系,建立PBL剪力连接件群的荷载-滑移变形协调理论模型。以该理论模型为基础,提出PBL剪力连接件群的荷载-滑移变形协调计算方法。理论及试验研究表明,所建立的理论模型能够反映PBL剪力连接件群的力学行为本质;所提出的计算方法具有物理意义明确、求解简便、计算效率高、便于应用等特点。该理论和方法为PBL剪力连接件群传力机理及其极限承载力研究奠定了理论及方法基础。

英文摘要：

In new-types of steel-concrete composite structures such as composite pylons,hybrid beams and hybrid arches,large loads are transferred in steel-concrete connecting sections of finite length through shear connector group,which poses new challenges,including guiding design concept,analytical theory and calculation method,and higher requirements for the shear connectors.Based on the loading property of PBL shear connectors and the relationship of the relative slip between steel and concrete components with the load distribution of each layer of PBL shear connectors,a theoretical model of load-slip deformation compatibility is established,and an analytical method considering the load transfer mechanism of PBL shear connector group developed.The theoretical model and the corresponding analytical method are verified through theoretical studies and model tests,for their physical meaning,solution simplicity and efficiency.