钢-混凝土结合段传力与变形研究

On Load Transmission and Deformation of Steel - concrete Joint Sections

长大公路隧道首级控制网的稳定性直接关系到隧道施工安全和贯通质量，必须对控制网进行定期复测，以便掌握控制点的稳定性。综合运用平均间隙法和EMBED Equation．3检验作为稳定性判别的方法，对某长大公路隧道GPS平面控制网多次复测成果进行了稳定性计算分析，很好判断了各GPS控制点的稳定状况，对隧道的施工安全和顺利贯通提供了强有力的保障。

This paper expounds the components and functions of steel -concrete joint sections, discusses the load transmission mechanism and deformation characteristics of joint sections and analyzes the mechanical performance of joint section with FEM on the basis of real bridge design, and finally makes some suggestions for joint sections design as the followings： to strengthen the connection to realize the rigid connection as far as possible; to increase stiffness to control the deformation mutations; to adopt prestress concrete measures for being in preloading state; to layout connectors uniformly and symmetrically; to take 50 mm as bearing plate＇sthickness generally; and to design as full -connection structure when using PBL connetor.