高墩桥梁结构损伤及延性性能研究  

Study on Damage and Ductility Performance of High Pier Bridge Structure

作　　者：李体翰 张金超 Li Tihan;Zhang Jinchao(Jinan Branch of Shanghai Municipal Engineering Design and Research Institute(Group)Co.,Ltd.,Jinan,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司济南分公司,山东济南

出　　处：《科学技术创新》2024年第16期119-122,共4页Scientific and Technological Innovation

摘　　要：为了提高桥梁的抗震性能,通过建立15 m、30 m和60 m高墩的计算模型,并采用一阶振型侧向荷载分布模式进行pushover分析,分析了墩顶位移、墩底曲率等损伤指标以及不同破坏准则对高墩桥梁性能评估的适用性。结果表明,随着墩高的增加,墩柱的周期增长,且高墩更易进入高阶振型,质量参与系数的分布显示出更多的质量参与到高阶振型中,且高墩具有一定的塑性变形和能量耗散能力,为抗震设计提供了重要依据。In order to improve the seismic performance of the bridge,the calculation models of 15 m,30 m and 60 m high piers are established,and the pushover analysis is carried out by using the first-order mode lateral load distribution mode.The damage indexes such as pier top displacement and pier bottom curvature and the applicability of different failure criteria to the performance evaluation of high pier bridges are analyzed.The results show that with the increase of pier height,the period of pier column increases,and the high pier is more likely to enter the high-order vibration mode.The distribution of mass participation coefficient shows that more mass participates in the high-order vibration mode,and the high pier has certain plastic deformation and energy dissipation capacity,which provides an important basis for seismic design.

关 键 词：高墩桥梁 抗震性能 延性性能 PUSHOVER分析 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]