《高墩桥梁抗震》doc.doc

郑州大学土木工程学院
硕士研究生课程论文
课程名称 抗震工程学
学 时
学 分
姓 名 张兴达
主讲教师 王建强
指导教师 （若已选导师则填，否则不填）
年 级 2014
学 号 z201421409
供职单位 河南省交通规划勘察设计院
联系电话 **********
Email ******@
提交日期
浅论高墩桥梁抗震措施
摘　要:为研究高墩桥梁抗震措施,以某高墩桥梁为例进行分析。建立该桥所有联的线弹性计算模型,进行动力特性分析和反应谱分析。分析结果表明:支座顶面与梁底面发生了相对滑移,支座剪切变形较大,存在落梁隐患。在该桥上设计合适的顺桥向连梁装置、横向弹塑性挡块等抗震措施后,通过非线性时程分析验证其抗震效果。分析结果表明,采用的抗震措施可有效地控制墩顶位移、减小地震反应。
关键词:连续梁桥;高桥墩;抗震;反应谱法;非线性;时程分析法
Study of Seismic Resistance Measures for High-Rise PierBridges Located in High Intensity Seismic Region
Abstract:To study the seismic resistance measures for high-rise pier bridges located in high
intensity seismic region,a high-rise pier continuous girder bridge in the region was cited as an example and linear elastic calculation models for all continuous units of the bridge were built and the analysis of the dynamic behavior and re-sponse spectrum was results of the analysis show the relative slip at the top of the bearings and at the bottom of the girder of the bridge takes place,the shear deformation of the bearings is great and the potential danger of fall of the girder the seismic resist-ance measures,such as the appropriate longitudinal girder link devices and the transverse elastic stopping blocks,are designed for the bridge,the effect of the measures has been verified by the nonlinear time-history analysis and the results of the analysis show that the measures can effec-tively control the displacement atop the piers and reduce the seismic words:continuous girder bridge;high-rise pier;seismic resistance;response spectrum method;nonlinearity;time-history analysis method
1　前　言
随着我国高等级公路建设的发展,高烈度地震区高墩桥梁日益增多。高墩桥梁受震害后修复困难,影响地震后生命线的畅通,将给地震区带来严重的次生灾害[1～4]。目前,国内外尚缺乏高墩桥梁经受高烈度地震的经验,而现有的大多数桥梁工程抗震设计规范只适用于常规桥梁抗震分析,我国《公路桥梁抗震设计细则》(JTG/T B02-01-2008)[5]规定墩高超过30 m的桥梁