矮塔斜拉桥塔高对主梁受力的影响分析

Analysis for Influences of Tower Height of Low Tower Cable-stayed Bridges on Stress of Girders

以某3跨矮塔斜拉桥为工程背景,利用有限元分析软件Midas/Civil建立有限元模型,通过改变主塔塔根无索区高度来对比分析主塔塔高对主梁挠度、内力及应力的影响。综合考虑施工阶段和使用阶段主塔塔根无索区高度对主梁受力的影响,提出合理的主塔塔根无索区高度设计建议。

With some 3 - span low tower cable - stayed bridge as project background, this paper establishes a finite element model by means of finite element analysis software Midas/Civil to analyze influences of the height of main tower on deflection, internal force and stress of girders by changing the height of the no-cable area at the root of main tower. The paper comprehensively considers influences of the height of the no - cable area at the root of main tower during construction and application, and proposes reasonable recommendations for design of the height of the no -cable area at the root of main tower.