基于不同挡块分析模型的连续梁桥横向抗震性能研究  

Research on Lateral Seismic Performance of Continuous Beam Bridges Based on Different Block Analysis Models

作　　者：孙炳灿 王明栓 SUN Bingcan;WANG Mingshuan(Zhengzhou Metal Products Research Institute Co.,Ltd.,Sinosteel Group Co.,Ltd.,Zhengzhou,Henan Province,450000 China)

机构地区：[1]中钢集团郑州金属制品研究院股份有限公司,河南郑州450000

出　　处：《科技资讯》2025年第1期156-159,共4页Science & Technology Information

摘　　要：以西南地区高速公路中一联连续梁为依托建立有限元模型,分别设置不同的挡块数学分析模型进行横向非线性时程分析,对比桥梁的地震响应,研究盖梁挡块的抗震性能。分析表明:地震发生时,挡块的设置能够一定程度上限制墩梁之间的相对位移,但会使下部结构的抗震需求变大。当地震力相对小时,设置挡块的不同分析模型时,桥梁的横向地震响应相差不大;当地震力足够大时,考虑挡块损伤模型,分析桥梁的横向抗震性能更为合理。A finite element model is established based on a continuous beam of a highway in the southwest region of China.Different mathematical analysis models are set up for lateral nonlinear time-history analysis,and the seismic response of the bridge is compared to study the seismic performance of the cover beam blocks.Analysis shows:when an earthquake occurs,the setting of blocks can to some extent limit the relative displacement between piers and beams,but it will increase the seismic demand of the lower structure.When the seismic force is relatively small,the lateral seismic response of the bridge does not differ much when different analysis models with blocking blocks are set;When the seismic force is strong enough,it is more reasonable to consider the damage model of the retaining block to analyze the lateral seismic performance of the bridge.

关 键 词：横向碰撞 时程分析 挡块模型 地震响应 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]