连续梁桥地震行波输入下支承长度的设计方法

英文篇名：Research on the Required Seating Length for Continuous Bridges under Longitudinal Excitation of Traveling Waves
中文刊名：华侨大学学报(自然科学版)
英文刊名：Journal of Huaqiao University(Natural Science)
作者：周光伟 ; 李建中 ; 陈昌萍
英文作者：ZHOU Guang-wei1 ; LI Jian-zhong2 ; CHEN Chang-ping1(1.Department of Civil Engineering ; Xiamen University of Technology ; Xiamen 361024 ; China ; 2.College of Civil Engineering ; Tongji University ; Shanghai 200092 ; China)
中文关键词：支承长度 ; 连续梁桥 ; 行波效应 ; 两单自由度系统结构
英文关键词：required seating length ; continuous bridges ; traveling wave effect ; two single-degree-of-freedom systems
出版日期：2013-01-20
机构：厦门理工学院土木工程与建筑系;同济大学土木工程学院;
年：2013
期：01
出版单位：华侨大学学报(自然科学版)

摘要

结合多跨连续梁桥的结构特点,把连续梁桥简化为两单自由度系统模型.基于相对位移法和随机振动理论,推导行波输入下由结构振动引起的最大墩梁相对位移公式,提出行波输入下基于规范反应谱的连续梁桥支承长度设计方法.通过一座多跨连续梁桥工程实例说明支承长度设计方法的具体工程应用,并采用非线性时程分析方法对设计结果进行验证.
Based on the key dynamic characteristics of multi-span continuous bridges,using the relative displacement method and random vibration theory,the maximum relative vibration displacement of pier and beam was derived under the excitation of traveling waves.Using seismic response spectrum,a design method of the required seating length for multi-span continuous bridges considering traveling wave effects was put forward.Analyzing an example of multi-span continuous bridges,the engineering application of the design method of the required seating length is demonstrated,and the proposed design method is verified by the results of nonlinear time history analysis.

引文

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