摘要
桥梁的动载试验在桥梁的监测评估中应用广泛,是其重要组成部分。通过对某市政钢混组合结构桥进行现场环境振动试验分析该桥梁的动力特性。利用迈达斯软件建立有限元模型并进行理论模态分析,得出该桥梁的理论模态频率和相应理论模态振型。同时,利用随机子空间方法分析现场实测数据,得出实测各阶模态频率和模态振型。
The dynamic load test of bridge is widely used in the detection and evaluation of bridges and is its important component. This paper analyzes the dynamic property of a municipal steel-concrete composite bridge through the field ambient vibration test. The theoretical mode analysis is made by establishing the finite element modal of the Midas software to conclude the theoretical mode frequency and the relative theoretical modal shape of this bridge. At the same time, the filed measured data is analyzed by the stochastic subspace method to conclude the measured modal frequency and modal shape. Two results of theoretical calculation and measured are compared and analyzed to provide the important reference for the operation state assessment and late operation maintenance of bridge, and the bridge design in the future.
出处
《城市道桥与防洪》
2018年第12期70-75,共6页
Urban Roads Bridges & Flood Control
关键词
钢混桥
模态分析
动载
动力特性
steel-concrete composite bridge
modal analysis
dynamic load
dynamic characteristic
作者简介
潘存瑞(1974-),男,甘肃兰州人,高级工程师,从事建筑施工管理工作。
