摘要
针对某在建150 m跨径钢筋混凝土箱形拱桥,采用开发的基于ANSYS的大跨桥梁抗震分析计算模块进行地震加速度时程响应分析。选用天津波和EL-Centro波两种加速度时程曲线,采用一致激励和行波激励分别进行地震时程响应分析。结果表明:与一致激励相比,考虑行波效应时,拱脚弯矩、l/4截面轴力和弯矩均有显著增大,拱脚轴力、拱顶轴力和弯矩则有所减小;各部位的顺桥向位移均增加。开发的抗震分析模块应用于实际工程中效果较好。
Seismic time-history response behavior analysis of long-span reinforced concrete box arch bridge is analyzed by using the modules developed with the program ANSYS for a reinforced concrete arch bridge which is being buih.This bridge＇ s span is 150 meters.Two acceleration time-history curves Tianjin wave and EL-Centre wave are chosen to analyze seismic time-history response by using uniform excitation and traveling-wave excitation.The results show that compared with the results got from the uniform excitation method, the moment at end arch and at 1/4 span, the force at 1/4 span beth increase a lot, but the force at end arch and top arch, the moment at top arch decrease when the traveling-wave effect is considered.
出处
《公路交通科技》
CAS
CSCD
北大核心
2007年第3期86-89,共4页
Journal of Highway and Transportation Research and Development
基金
交通部西部交通建设科技资助项目(200331878011)
关键词
桥梁工程
拱桥
地震时程响应
一致激励
行波效应
bridge engineering
arch bridge
seismic time-history response
uniform excitation
traveling-wave effect
