摘要
利用悬索桥的倒拆分析来判断悬索桥的设计与施工是否正确合理。以永大高速公路江底河特大悬索桥为例,利用Midas civil建立有限元模型,准确分析确定其合理的成桥状态、空缆线形,在倒拆分析中考虑温度效应对悬索桥成桥及空缆线形的影响,对其施加不同的温度梯度,对比悬索桥前后线形位移。结果表明,温度梯度对悬索桥的线性位移影响很大,其变化与主缆的位移近似成线性关系,且相较于未施加温度梯度时的线形位移成倍数增加。要高精度地架设主缆索股,需在依靠可靠数据的基础上按空缆线形随温度变化关系进行内插。
To judge whether the design and construction of suspension bridge is correct and reasonable, the inverted analysis of suspension bridge is used.Taking jiangdihe super large suspension bridge of Yongda expressway as an example, the finite element model of suspension bridge is established by Midas civil, and its reasonable completion state and empty cable shape are accurately analyzed and determined. The influence of temperature effect on the completion of suspension bridge and the shape of empty cable is considered in the reverse analysis, the effect of temperature on the completion of the suspension bridge and the shape of the cable is considered in the reverse analysis.The results show that the temperature gradient has great influence on the linear displacement of suspension bridge, and the change is approximately linear with the displacement of main cable, and its change is approximately linear with that of the main cable. In order to set up the main cable strands with high precision, it is necessary to interpolate the shape of the cable according to the change of temperature on the basis of reliable data.
作者
李磊
薛小强
LI Lei;XUE Xiao-qiang(Chengdu University of Technology,Sichuan Chengdu610059China)
出处
《江苏建筑》
2021年第1期16-19,24,共5页
Jiangsu Construction
关键词
大跨悬索桥
倒拆分析
温度效应
空缆线形
large span suspension bridge
reverse analysis
temperature effect
empty cable alignment
