钢管砼系杆拱桥模态参数识别及有限元仿真  

Modal Parameter Identification and Numerical Simulation in FEM of CFST Tied-Arch Bridge

作　　者：于国军[1] 陈灯红[2] 操礼林[1] 孙虎[1] 

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2015年第5期58-61,83,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(编号:51408267);江苏省自然科学基金(编号:BK20140560);江苏大学高级专业人才科研启动基金(编号:14JDG161;14JDG162)

摘　　要：以宁杭南河特大桥主桥-钢管砼系杆拱桥为背景工程进行成桥的动态试验,利用环境激励下桥面的动力响应数据进行全桥的动力特性参数识别,采用PDV100激光测振仪测得拱桥的吊杆内力.基于ABAQUS建立整幅桥梁的三维有限元模型,结合所识别的桥面模态参数以及测得的吊杆内力,对钢管砼系杆拱桥的有限元模型进行修正.研究结果表明:经修正后的模型能更准确地反映结构的动力特性,可作为桥梁结构健康监测中损伤识别与安全评估研究工作的基准模型.The dynamic test of the Concrete Filled Steel Tubular Ning-Hang South River Main Bridge,concrete filled steel tubular（CFST）tied arch bridge,as the engineering background was done.The dynamic characteristics of the whole bridge were carried out using the dynamic response data based on ambient excitation,and the internal force of arch bridge was measured by PDV100 laser vibrometer.A three-dimensional finite element model of the whole CFST tied-arch bridge was established with ABAQUS,combined with the identification of the modal parameters of the bridge and the measured internal force of the hanger rods,the FEM of CFST tied-arch bridge was modified.The results show that the finite element model updated can accurately reflect the dynamic characteristics of the bridge structure,which can be used as the benchmark model for the research work of damage identification and security assessment in the bridge health monitoring system.

关 键 词：系杆拱桥 峰值拾取法 模型修正 模态参数识别 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]