结合梁斜拉桥钢砼结合部应力传递分析

Stress Transmission Analysis of Joint Section on the Composite Girder Cable-stayed Bridge

结合部是结合梁斜拉桥结构及材料的突变部位,构造及受力状态复杂,是桥梁设计的关键。该文结合武汉二七路三塔结合梁斜拉桥,建立结合部ANSYS有限元模型,针对运营过程中六种不利工况,分析结合部主应力分布状态及传递规律。结果表明,结合部整体呈受压及低应力状态,结合部应力满足设计要求。

Joint section is the mutation of structures and materials on the composite girder cable-stayed bridge. The structure and stressing state of Joint section are extremely complicated, which is the important link of bridge design. This paper builds the spatial finite element of joint section on Road Erqi Wuhan Yangtze River Bridge and analysises the situation of principal stress distribution and transmission rule on the joint section according to six unfavorable load cases during operation process. The results showed that joint section is in low-stress state, and its stress distribution can completely meet the requirements of design.