摘要
为了研究不同主梁断面形式对斜拉桥动力特性的影响程度,通过建立有限元模型对基频进行计算,对比了不同断面类型在风荷载作用下的结构动力特性。结果表明:不同的主梁断面类型主要影响主梁振型的出现次序及频率大小,而在相同截面尺寸下,闭口断面类型的桥梁在竖弯、侧弯、扭转等方面的频率比开口断面均有很大提升。
In order to study the impact of different section types of girders on the dynamic characteristics of cable-stayed bridge, the fundamental frequency was calculated in combination with a finite element model, and the comparison on dynamic characteristics under different wind loads was conducted. The results show that the section types of girders mainly affect the emergence order and frequency of girder vibration. With the same size of section, bridge with close section shows improved frequency of vertical bending, lateral bending and reversing.
出处
《筑路机械与施工机械化》
北大核心
2015年第7期73-76,共4页
Road Machinery & Construction Mechanization
关键词
断面类型
斜拉桥
频率
风荷载
section type
cable-stayed bridge
frequency
wind load
