桥梁自振特性与承载能力分析  

Vibration Characters and Bridge Load-bearing Capacity Analysis

作　　者：王岐峰[1] 李炎 李万恒[1] 刘文峰[1] 

机构地区：[1]交通部公路科学研究所,北京100088 [2]浙江杭州杭徽高速公路有限公司,浙江杭州310013

出　　处：《公路交通科技》2005年第11期93-95,共3页Journal of Highway and Transportation Research and Development

摘　　要：桥梁结构自振特性与结构承载能力有着内在联系;自振频率与桥跨刚度、结构挠度检验系数存在一定关系。通过结构响应模态振型振幅的比较,可以对结构横向联系使用状况进行损伤识别。通过实测桥梁结构阻尼比的变化,可以对结构边界条件、结构材料阻尼特性的改变进行分析判断。本文结合两座桥梁自振特性的跟踪测试,对桥梁自振特性和承载能力之间的关系进行分析。There are inherent relations between vibration parameter and carrying capacity of bridge structure. There is certain relation between eigenfrequency and bridge rigidity and displacement check coefficient, By analyzing the vibration mode land amplitude of the structure response, we can know the transverse beams＇ damages. Structural boundary status can be judged by the structure damping ratio change. The relation between bridge load-bearing capacity and damages is analyzed in the paper by tracking of the measurement.

关 键 词：自振特性 模态分析 横向联系 自振频率 阻尼比 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]