佛陈扩建桥钢-RPC组合铺装钢箱梁桥振动测试与模态识别  

VIBRATION TESTS AND MODAL IDENTIFICATION FOR FOCHEN EXPANSION STEEL BRIDGE WITH STEEL-RPC COMBINATION PAVEMENT

作　　者：祝志文[1] 刘力[1] 向建军[2] 王甜[2] 石亚光[1] 喻鹏[1] 

机构地区：[1]湖南大学土木工程学院桥梁系,长沙410082 [2]湖南省交通规划勘察设计院,长沙410008

出　　处：《钢结构》2016年第11期26-30,25,共6页Steel Construction

基　　金：湖南省交通厅科技项目(201522);国家重点基础研究发展计划(2015CB057701;2015CB057702);国家自然科学基金项目(51278191)

摘　　要：结构动力特性反映了桥梁质量和刚度分布特征,是桥梁动力分析的重要参数。为获得钢-RPC组合铺装正交异性桥面板钢箱梁桥的模态特征,了解桥面铺装刚度增大带来的结构整体刚度变化,采用基于参考点的环境激励法,通过在佛陈桥钢箱梁内布置多个测点,进行分批次测量,采用峰峰值拾取的方法识别了该桥多阶模态参数,测试的振型具有较好的合理性。The dynamic characteristics of structures,which reflects mass and stiffness distribution characteristics of the bridge,is an important parameter in the bridge dynamic analysis. In this test,measuring points were arranged inside the steel box girder,which were measured in bridge site by using the ambient excitation method based on the reference points.The modal parameters of this bridge were identified by peak-picking method in order to obtain the modal characteristics of the steel bridge with steel-RPC combination pavement on orthotropic steel bridge deck（ OSBD）,which could help to understand the difference of the overall stiffness of the structure due to the variation of pavement stiffness. The identified structural modal was justified to be reasonable in this test.

关 键 词：正交异性钢桥面板 钢-RPC组合铺装 环境激励 模态参数 现场实测 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U448.213[交通运输工程—道路与铁道工程]