多跨连续梁桥纵桥向动力特性研究及其地震反应谱简化分析

英文篇名：Dynamic Characteristic of Multispan Continuous Bridges in Span Direction and Its Seismic Analysis of Response Spectrum
中文刊名：交通与计算机
英文刊名：Computer and Communications
作者：周光伟 ; 李建中 ; 范立础
英文作者：ZHOU Guangwei 1 ; 2 LI Jianzhong1 FAN Lichu1(Tongji University ; Shanghai 200092 ; China)1(Wuxi Municipal Design & Research Institute Co. ; Ltd ; Wuxi 214072 ; China) 2
中文关键词：多跨连续梁桥 ; 动力特性 ; 地震反应谱分析
英文关键词：multi-span continuous bridges ; dynamic characteristic ; seismic response spectrum analysis
出版日期：2008-10-20
机构：同济大学;无锡市政设计研究院有限公司;
年：2008
期：05
出版单位：交通与计算机

摘要

根据多跨连续梁桥的主要结构特点,采用简化的模型来模拟纵桥向的地震动力反应。通过求解简化模型的动力方程,分析了质量比对连续梁桥纵桥向的动力特性的影响,并用能量法推导了低阶振型地震反应的近似公式。通过与有限元方法的比较,验证了采用几个低阶振型组合计算的反应谱方法的可行性。
Based on the key dynamic characteristics of multispan continuous bridges,a simplified analytical model was adopted to simulate the seismic response in span direction.The effects of mass ratio on dynamic Characteristics were investigated by solving the dynamic equation of the model.The approximate formula of seismic response were deduced based on Energy Conservation Law.Finally,in contrast with the finite element method,the feasibility of the proposed seismic response spectrum method of the combination of some lower modes was verified.

引文

[1]何度心.桥梁抗震计算[M].北京:地震出版社,1991
    [2]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,2002
    [3]Chopra A K,Goel R K.Direct displacement-baseddesign:use of inelastic vs.elastic design spectra[J].Earthquake Spectra,2001,17(1),47-64
    [4]刘延芳,叶爱君,王斌斌.现行桥梁抗震设计规范对超长多跨连续梁桥的适用性分析[J].工程抗震与加固改造,2007(3):104-108