变刚度预应力简支梁桥固有振动分析  

Natural Vibration Analysis for a Simply Supported Girder Bridge with Varying Rigidity and Prestressing Force

作　　者：王解军[1] 王明明[1] 梁锦锋[1] 

机构地区：[1]湖南大学结构工程研究所,湖南长沙410082

出　　处：《中南公路工程》2005年第3期62-64,共3页Central South Highway Engineering

基　　金：湖南大学人才基金项目(200227)

摘　　要：考虑预应力建立简支梁桥竖向固有振动理论方程并求解,运用解析与有限元方法对一座实际简支梁桥的固有振动频率进行了计算,并现场测试了结构的基频;深入分析了预应力以及变刚度对简支梁桥竖向固有振动频率的影响。The theoretical equation of natural vibration for a simply supported girder bridge is estab lished and solved with consideration of prestressing force. The natural vibration frequencies are then calculated with analytical and finite element methods for an actual bridge, followed by in-situ test of fundamental frequen cy. Based on the calculation and testing, the influences of prestressing force and varying rigidity on vertical natural vibration frequencies of simply supported girder bridge are detailed.

关 键 词：预应力 简支梁桥 固有振动 变刚度 

分 类 号：U448.217[建筑科学—桥梁与隧道工程]