铁道标准设计2017，Vol.61Issue(5)：96-100,5.DOI:10.13238/j.issn.1004-2954.2017.05.021
高速行车时多塔斜拉桥动力性能研究
Dynamic Performance of Multi-span Cable-stayed Bridges under High Speed Trains
摘要
Abstract
The paper presents a numerical analysis of the dynamic performance of a multi-span cable-stayed bridge under high speed maglev trains.The research results indicate that the second main span is apt to generate secondary excitation in the driving direction under the high speed train due to the dissymmetry of the first-order vertical bending vibration mode.Thus the dynamic response of the second span is more severe than the first span and the secondary excitation exaggerates with the decreasing of the fundamental frequency.To reduce the excessive dynamic response of the bridge, four stiffening measures are proposed.The analysis results show that utilizing steel truss to strengthen the bridge is extremely effective in improving the mechanical properties, and consolidating the beam with central tower and using side tower floating structure are remarkable in improving the integral rigidity of the bridge, which is applicable to multi-span cable-stayed bridges.关键词
高速列车/多塔斜拉桥/动力性能/加劲措施Key words
High speed train/Multi-span cable-stayed bridge/Dynamic performance/Stiffening measures分类
交通工程引用本文复制引用
喻建云,何志辉,宋晓东..高速行车时多塔斜拉桥动力性能研究[J].铁道标准设计,2017,61(5):96-100,5.基金项目
江苏省自然科学基金项目(BK20160681) （BK20160681）
中央高校基本科研项目(2242016K40106) （2242016K40106）
