高墩抗震梁桥单墩模型地震时程响应分析  

Seismic Response Analysis of Single Column Model for Seismic Girder Bridge with High Pier

作　　者：陈少凡 陈洋洋[2] 姜慧[3] 谭平[2] 

机构地区：[1]广东省清远市佛冈县建筑工程质量监督站,广东清远511600 [2]广州大学减震控制与结构安全国家重点实验室(培育),广东广州510405 [3]中国地震局地震监测与减灾技术重点实验室,广东广州510070

出　　处：《华南地震》2013年第4期47-53,共7页South China Journal of Seismology

基　　金：973国家重点基础研究发展计划项目(2011CB013606);"十二五"国家科技支撑计划项目(2012BAJ07B02);国家自然科学基金青年项目(11102045);广东省自然科学基金博士启动项目(S2011040004039)

摘　　要：直接基于经典的欧拉梁理论,推导针对规则高墩梁桥单墩模型弹性阶段地震时程响应的半解析计算步骤,考虑梁墩铰接的形式,在墩底引入等效基础弹簧变形协调条件,解析的获得各阶实模态和频率方程,用牛顿法搜索各阶频率,应用振型叠加法求解体系的地震时程响应。最后应用该方法对一高墩梁桥单墩模型的地震响应进行分析,与离散模型的有限元时程积分的结果比较表明了方法的有效性。Based on the classical theory of Euler beam, a solving procedure for time history response of single column model for high-pier rigid frame bridge is developed. The equivalent foundation spring and deformation compatibility conditions are introduced to the governing equations. The real modes and frequency equations are given analytically, and the frequencies are calculated by the newton method. The mode superposition method can be introduced for solving the time-history response. Finally, the present procedure is applied to study the seismic response of a single column model for high-pier girder bridge. The comparison with discrete numerical result by the finite element method shows the effective of the oresent method.

关 键 词：高墩梁桥 单墩模型 地震响应 模态叠加 

分 类 号：P315.923[天文地球—地震学]