多跨径连续梁拱组合体系桥梁的抗震分析  

Seismic Analysis of Multi-Span Continuous Beam Arch Composite Bridge

作　　者：魏星 甘肃 WEI Xing;GAN Su(CCCC Second Harbor Engineering Company Ltd.,Wuhan 430060,China;Central&Southern China Municipal Engineering Design and Research Institute Co.Ltd.,Wuhan 430010,China)

机构地区：[1]中交第二航务工程勘察设计院有限公司,武汉430060 [2]中国市政工程中南设计研究总院有限公司,武汉430010

出　　处：《工程建设与设计》2024年第7期106-108,共3页Construction & Design for Engineering

摘　　要：为分析多跨径连续梁拱组合体系桥梁的抗震性能,结合某多跨径连续梁拱组合体系桥梁实际工程,采用有限元分析软件建立桥梁的地震动力时程分析模型,并根据振动方程获取桥梁结构的地震响应。研究结果显示:一维地震作用下,桥梁结构位移时程响应最大值为0.079m;多维地震作用下,桥梁结构位移时程响应最大值为1.228m。因此可知,多维地震作用下桥梁结构抗震性能更薄弱,进行多跨径连续梁拱组合体系桥梁的抗震设计时应兼顾横桥向与顺桥向地震作用的影响。In order to analyze the seismic performance of multi-span continuous beam arch composite bridge,according to the practical engineering of a multi-span continuous beam-arch combined bridge,the seismic dynamic time-history analysis model of the bridge was established by using finite element analysis software,and the seismic response of the bridge structure was obtained according to the vibration equation.The results show that under one-dimensional seismic action,the maximum displacement time-history response of the bridge structure is 0.079 m;Under multi-dimensional seismic action,the maximum displacement time history response of bridge structure is 1.228 m.So the seismic performance of bridge structure is weaker under multi-dimensional earthquake action.The seismic effects of cross bridge and forward bridge should be taken into account in the seismic design ofmulti-span continuous beam arch composite bridge.

关 键 词：多跨径桥梁 连续梁拱组合体系 桥梁抗震性能 抗震分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]