超大跨径斜拉桥受力特性分析

Analysis on mechanical characteristics of long-span cable-stayed bridge

就1 600 m斜拉桥在方案试设计过程中遇到的问题进行了一些探讨,对斜拉桥跨径增大后在动力特性方面表现出与常规斜拉桥的不同进行了概念分析;此外,从静力和动力的角度分析了1 600 m斜拉桥在施工长悬臂阶段的受力情况,验证了最大单悬臂状态的施工安全性。

This paper discusses problems encountering in scheme design process of 1 600 m cable-stayed bridge,analyzes dynamic features difference between common cable-stayed and cable-stayed bridge after increasing span.Moreover,it analyzes mechanical condition of 1 600 m cable-stayed bridge at long cantilever construction phase from static and dynamic aspects,and proves the construction security under the largest single cantilever state.