中国工程科学2012，Vol.14Issue(5)：80-84,5.
移动荷载作用下三塔悬索桥的强迫振动研究
The study of forced vibration for three-tower suspension bridge under moving loads
摘要
Abstract
Taking Taizhou Bridge for example, dynamic characteristics of the finite element model are analyzed and then the effects of different moving speeds and loads on dynamic response of three-tower two-span suspension bridge are studied. The result demonstrates that vertical bending of natural frequency is approximately 0. 08 Hz, which is far below natural frequency loading truck, and will not form resonance condition. The response of force and displacement of three-tower two-span continuous suspension bridge under simply moving loads and equivalent static loads are the same. The structural will be greater when moving loads quantity and speed become greater and they have similar positive relationship. However, the load amplification factor of structural force and displacement does not vary with the quantity change of moving loads.关键词
动力特性/强迫振动/响应/荷载放大系数Key words
dynamic characteristics/ forced vibration/ response/ load amplification factor分类
交通工程引用本文复制引用
冯兆祥,陈亮,缪长青..移动荷载作用下三塔悬索桥的强迫振动研究[J].中国工程科学,2012,14(5):80-84,5.基金项目
国家科技支撑计划资助项目(2009BAG15B03) （2009BAG15B03）
国家自然科学基金资助项目(51078080) （51078080）
江苏省自然科学基金资助项目(BK2008316) （BK2008316）
江苏省"333高层次人才培养工程"专项资助 （）
