千米级斜拉桥主桥施工加载过程分析

Construction process analysis for the main span of a thousand-meter scale cable-stayed bridge

对某千米级斜拉桥的施工加载过程进行了分析,结合有限元步进法、一阶分析法和按龄期调整的有效模量法,编制了相应的计算程序.根据该桥实际划分的施工时段,计算桥梁从施工到成桥任一时刻主梁和主塔受力和变形状态,并提出了建议.

The cantilever construction process of a thousand-meter scale cable-stayed bridge is investigated. According to the step by step finite element method, first order optimization method and the age adjusted effective modulus method, a computing program is presented in this paper. Based on actual dividing constructed stages of this bridge, Stress and deformation of girders and cable tower at any period of time during the whole construction course are analyzed. Some of useful comments are presented.