大跨度结合梁斜拉桥施工阶段静力分析

摘要

The cable-stayed bridge is a highly statically indeterminate structure, and in the construction phase due to the continuous changing of the cable-stayed bridge structural system and load state,the structural internal force varies accordingly. Therefore,a detailed analysis and checking for the cable-stayed bridge in each construction phase, and by that a clear and definite provision as well as the effective management and control is in the construction are required. In this paper, the finite element analysis program is applied in the static condition analysis in the construction process for long-span cable-stayed bridge with composite beam, and by which we propose special typical operating conditions required close attention in construction, in order to guide the construction.%斜拉桥属高次超静定结构,在施工阶段随着斜拉桥结构体系和荷载状态的不断变化,结构内力亦随之变化.因此,需对斜拉桥的每一施工阶段进行详尽的分析、验算,依此对施工的顺序做出明确的规定,并在施工中加以有效的管理和控制.本文利用有限元分析程序,对某大跨度结合梁斜拉桥在施工过程中的静力行为进行了分析,并以此提出施工中需要密切注意其安全的特殊典型工况,以指导施工.