不同拆索顺序下钢桁架拱桥受力行为分析  

The analysis on bearing behavior of steel truss arch Sbridge under different cable release sequences

作　　者：张依濛 Zhang Yimeng(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,Hunan)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《工程建设》2020年第11期34-36,共3页Engineering Construction

摘　　要：本文使用ANSYS建立某钢桁架拱桥有限元模型,对比分析不同拆索顺序对扣索索力、拱圈弯矩及竖向变形的影响效应。计算结果表明:从拱顶至拱脚依次拆索对临近区域索力增量的影响最小,仅为22.3%;从拱脚至拱顶依次拆索与一次成拱时拱圈的弯矩分布最为逼近,同时其对拱圈竖向变形的抑制效果也相对最好。ANSYS is used to an establish the finite element model of a steel truss arch,and the effects on cable force,arch ring bending moment and vertical deformation with different cable release sequences are analyzed.The results show that the impact of the cable force increment from the arch top to the arch foot in the adjacent area is the smallest only for 22.3%;the bending moment distribution of the arch ring is most similar when the cable is arched from the arch foot to the arch top.At the same tim e,the effect of suppressing the vertical deformation of the arch ring is relatively best.

关 键 词：钢桁架拱 拆索顺序 索力增量 拱圈弯矩分布 竖向变形 

分 类 号：U448.224[建筑科学—桥梁与隧道工程]