预应力混凝土连续梁桥静动力特性试验分析  

Experiment and analysis of static and dynamic characteristics of prestressed concrete continuous girder bridge

作　　者：湛发益[1] 贺国京[1] 陈爱军[1] 易锦[1] 

机构地区：[1]中南林业科技大学土木工程与力学学院,湖南长沙410004

出　　处：《铁道科学与工程学报》2009年第4期17-21,共5页Journal of Railway Science and Engineering

基　　金：湖南省教育厅科学研究项目(08C939);中南林业科技大学青年科学研究基金重点项目(06008A)

摘　　要：以1座实际预应力混凝土连续箱梁桥为背景,应用MIDAS CIVIL2006软件,采用空间有限元模型分析其最不利弯矩、应力、变位和自振频率,并与该桥静动载试验测试结果进行比较分析。研究结果表明:主要测点的应变与挠度实测值均小于理论计算值,相对残余应变与挠度在控制值以内,实测自振频率高于计算频率而实测冲击系数小于计算值。该成果可为此类桥梁长期跟踪监控提供依据,也为完善预应力混凝土连续箱梁桥设计积累资料。Based on a practical engineering, a prestressed concrete continuous box girder bridge was analyzed un- der the space finite element model with a software MIDAS CIVIL2006 on its maximum moment, stress, deflection and natural frequency. The calculation results were compared and analyzed with the measured values from the bridge＇ s experiment under static and dynamic load. The results show that the measured values of strain and de- flection of main measuring points are less than calculation results and relative residual - strain and deflection are under control values. The measured values of natural frequency are greater than the calculation ones and the measured values of impact coefficient are less than the calculation impact coefficient. The achievement can pro- vide scientific basis for long - term tracing and monitoring and accumulate data for perfecting design of pres- tressed concrete continuous box girder bridge.

关 键 词：连续梁桥 静动力分析 试验 评定 

分 类 号：U446.1[建筑科学—桥梁与隧道工程] U448.21[交通运输工程—道路与铁道工程]