框架地道桥动力特性探讨与分析  

Discussion and Analysis of Dynamic Characteristics of Frame Underpass Bridge

作　　者：陈瀚森 Chen Hansen(Hebei Provincial Communications Planning,Design and Institute Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]河北省交通规划设计研究院有限公司,石家庄市050000

出　　处：《北方交通》2023年第3期22-25,共4页Northern Communications

摘　　要：为研究框架地道桥的动力特性,从动力特性角度分析桥梁施工质量,运用动态信号测试分析系统,对某新建斜交框架地道桥进行了现场实测,同时建立三维实体模型做有限元分析,比较自振频率与冲击系数两项参数的理论值和实测值。结果表明:两项参数的实测值与理论值相差不大,证明了有限元分析模型的适用性;对于新建框架地道桥,当静力特性受条件制约无法分析时,可从动力特性角度分析其施工质量。In order to study the dynamic characteristics of the frame underpass bridge,the bridge construction quality is analyzed from the perspective of dynamic characteristics,the field measurement on a newly-built skew frame underpass bridge is carried out by using the dynamic signal test and analysis system,and meanwhile the three-dimensional solid model is established for finite element analysis to compare the theoretical and measured values of the two parameters of natural vibration frequency and impact coefficient.The results show that:the measured values of the two parameters are similar to the theoretical values,which can prove the applicability of the finite element analysis model;for the newly-built frame underpass bridge,when the static characteristics cannot be analyzed due to conditions,the construction quality can be analyzed from the perspective of dynamic characteristics.

关 键 词：框架地道桥 动力特性 动态信号采集 实体有限元 模态分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]