双斜塔无背索斜拉桥拉索温度效应分析  

Analysis of Cable Temperature Effect of Double Inclined Tower Cable-stayed Bridge Without Back Cable

作　　者：杨吉新[1] 杨蒋鹤立 周兴宇[1] 陈一赫 梁亚兰[1] YANG Jixin;YANG Jiangheli;ZHOU Xingyu;CHEN Yihe;LIANG Yalan(School of Transportation,Wuhan University of Technology,Wuhan430063,China)

机构地区：[1]武汉理工大学交通学院,武汉430063

出　　处：《武汉理工大学学报（交通科学与工程版）》2018年第6期911-914,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：安徽省高校自然科学研究项目资助(KJ2016A448)

摘　　要：为了研究双斜塔无背索斜拉桥斜拉索温度效应,以六安市寿春西路大桥为背景,通过有限元软件Midas Civil建立该桥的空间实体模型,给其施加不同情况下的温度荷载,考察在温度效应的作用下主塔与副塔关键截面处的应力情况与各个方向的变形趋势.对其进行计算分析,并绘制不同温度条件下的影响曲线.结果表明,在斜拉索升温和降温作用下主塔与副塔将会产生较大的拉应力,对混凝土造成不良影响,同时桥塔将会产生的较大结构变形,对施工和监控带来不利影响.故应在其设计、选材和施工中着重考虑这一问题.In order to study the temperature effect of double inclined tower cable-stayed bridge without back cable,taking Shouchun West Road Bridge in Lu′an City as the background,the spatial entity model of the bridge was established by finite element software MIDAS Civil.By applying temperature loads under different conditions,the stress situation and deformation trend in all directions at the key sections of the main tower and the auxiliary tower under the action of temperature effect were investigated and the influence curves under different temperature conditions were drawn.The results show that the main tower and the auxiliary tower will have great tensile stress and will have adverse effects on the concrete under the action of stay cable heating and cooling.Meanwhile,the change of cable temperature will lead to large structural deformation of the bridge tower,which will adversely affect the construction and monitoring.Therefore,this problem should be taken into account in its design,material selection and construction.

关 键 词：斜拉索 双斜塔无背索斜拉桥 温度效应 应力 变形 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]