摘要
Abstract
With reference to the railway PC single pylon cable-stayed pre-stressed concrete bridge located in Zhengzhou-Wanzhou dedicated passenger line with span arrangement of (32 + 138 + 138 + 32) m and swivel construction method,researches on the key construction and design technology of ZhengzhouWanzhou Railway cable-stayed bridge are carried out.A three dimensional finite element model is established in full consideration of the structure nonlinear effect,and the structure and mechanical behaviors of the high-speed railway cable-stayed bridge are studied with theoretical analysis method.Main bridge static analysis,stability analysis,detail optimization analysis,and structure dynamic analysis are conducted.The research results show that the swivel construction method can effectively reduce the influence on the existing railway line.The structure stress and displacement are acceptable and the structure stability factor is large during construction and finishing stages.Therefore,all the indexes satisfy the requirements of specification with sufficient redundancy.For long-span railway cable-stayed bridge,the local force of cable tower is complicated,so the analysis of the local force is necessary to optimize detailed design.The bridge structure has the characteristics of larger stiffness,better integrity,and better dynamic performance to allow for higher driving comfort.关键词
铁路桥/预应力混凝土/独塔斜拉桥/设计/高速铁路/联络线Key words
Railway bridge/Pre-stressed concrete/Single pylon cable-stayed bridge/Design/High-speed railway/Connecting line分类
交通工程
