混合连续梁钢混结合段力学性能研究

Mechanical Study of Steel-concrete Joint of Hybrid Continuous Girder Bridge

以平申线航道(上海段)整治工程中泖港大桥为工程背景,建立组合桥面板钢一混凝土梁结合段板壳实体有限元模型,进而分析实桥结构结合段及两侧主梁应力分布、受力特点以及钢混结合段的荷载传递机理。在实桥有限元模型基础上,针对纵向预应力、连接件数量、连接件刚度,对模型进行系列参数化分析,总结上述参数对结合段力学性能的影响,为今后钢混结合段结构设计提供依据。

Based on the Maogang Bridge in Pingshen Line remediation project,this paper establishes a finite element model of the steel-concrete joint section with composite deck,and analyzes the stress distribution,stress characteristics and load transfer mechanism of the steel-concrete joint.Based on the FEM model,a series of variable parameters analysis,including longitudinal prestress property,gap and stiffness of stud connectors,are carried out to analyze the influencing factor of the mechanical properties of the joint section.The influence of the above parameters is summarized,which provides a basis for the future design of the steel-concrete joint.