大跨石拱桥主拱结构动力特性测试与分析  

Test and analysis of dynamic characteristics of main arch structure of stone arch bridge

作　　者：吴植安[1] Wu Zhi’an(Taiyuan University of Technology,Taiyuan 030024, China)

机构地区：[1]太原理工大学,山西太原030024

出　　处：《山西建筑》2018年第36期145-147,共3页Shanxi Architecture

摘　　要：利用脉动法对大跨石拱桥主拱结构进行了动力特性测试,获取了主拱结构的自振频率、振型及阻尼比的实测数据,又采用MIDAS/Civil有限元软件计算得到主拱结构的动力特性理论解,对比实测结果与理论结果的差异,表明桥梁的实际刚度大于设计刚度,且实测振动曲线与理论计算值基本相符,主拱结构整体刚度"完好",试验桥梁结构振动状态正常。In this paper,the dynamic characteristics of the main arch structure of stone arch bridge are tested by using the pulsation method.The measured data of the natural frequency,mode shape and damping ratio of the main arch structure are obtained. The theoretical solution of the dynamic characteristics of the main arch structure is calculated by using MIDAS/Civil finite element software. The difference between the measured results and the theoretical results is shown. The actual stiffness of the beam is greater than the design stiffness,and the measured vibration curve is basically consistent with the theoretical calculation value. The overall stiffness of the main arch structure is"good condition"and the vibration state of the test bridge structure is normal.

关 键 词：石拱桥 动力特性 脉动法 

分 类 号：U441[建筑科学—桥梁与隧道工程]