连续刚构桥地震响应时程分析及荷载谱研究  

Study on response time history and load spectrum of continuous rigid frame bridge

作　　者：黄晓东 Huang Xiaodong(China Huaxi Engineering Design&Construction Co.,Ltd.,Chengdu Sichuan 610000,China)

机构地区：[1]中国华西工程设计建设有限公司,四川成都610000

出　　处：《山西建筑》2023年第17期9-12,23,共5页Shanxi Architecture

摘　　要：连续刚构桥具有支座处刚性连接的特点,在受到地震荷载作用下,容易出现桥梁倾覆及节点破坏的事故发生,研究其抗震受力特性具有重要意义。因此,为研究连续钢构桥的地震响应,依托于某桥梁项目,采用EI-Centro地震波模拟连续钢构桥的抗震性能,得到荷载与时程、荷载与频谱之间的关系,获得以下结论:在地震荷载作用下,桥墩容易出现倾覆,在主梁支座节点处易产生剪切破坏而可能导致支座处发生开裂现象,设计时应加强桥梁下部结构的稳定性及连续钢构桥刚性连接处的加固处理。研究结果可为桥梁设计提供理论参考依据。Continuous rigid frame bridge has the characteristics of rigid connection at the support,which is prone to bridge overturning and joint failure accidents under seismic loads.Therefore,in order to study the seismic response of continuous steel Bridges,based on a bridge project,this paper adopts EI-Centro seismic waves to simulate the seismic performance of continuous steel Bridges,and obtains the relationship between load and time history,load and spectrum.The following conclusions are obtained:Under the action of seismic load,the pier is prone to overturn,and the shear failure is easy to occur at the joints of the main beam support,which may lead to the cracking phenomenon at the support.The stability of the bridge substructure and the reinforcement of the rigid joint of the continuous steel bridge should be strengthened during the design.The research results can provide theoretical reference for bridge design.

关 键 词：连续刚构桥 抗震 荷载 响应 

分 类 号：TU997[建筑科学—市政工程]