空间四索面联体独塔斜拉桥塔梁固结段应力分布规律及合理构造研究

摘要

On the basis of establishing a local multi-scale analysis model of consolidation section between tower and girder of some single-tower cable-stayed bridge with four spatial cable planes,this paper obtains local stress level and distribution rule in this area via accurate simulation for boundary conditions of load and displacement,and determines the causes of excessive major tensile force at arc section of upper pylon junction through further study.Based on 2 factors,i.e.detail construction and internal force balance,the paper lays down three optimized schemes and compares the optimized results and proposes the recommended scheme.%针对某空间四索面独塔斜拉桥建立塔梁固结段的多尺度局部分析模型,通过对荷载及位移边界条件的准确模拟,得到该区域的局部应力水平及分布规律,并通过进一步研究,确定上塔柱交接处圆弧段主拉应力偏大的产生原因.基于细部构造及内力平衡2个因素拟定3种优化方案,并对优化效果进行对比,提出推荐方案.