基于OpenSees python的城市轨道交通桥墩抗震影响因素及破坏状态分析  

Analysis of seismic factors and failure state of urban rail transit piers based on OpenSees python

作　　者：周彦希 ZHOU Yanxi(China Railway SIYUAN Survey And Design Group Co.,LTD.,Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司桥梁院,武汉430063

出　　处：《铁道勘测与设计》2025年第1期68-72,共5页Railway Survey and Design

摘　　要：本文为提高桥墩抗震评估效率,基于昆明城市轨道交通,通过python编程结合OpenSees构建模型,使用Midas验证模型的正确性、python计算结果和Midas结果差值百分比在9%以内,模型吻合良好。计算桥墩的墩顶位移,以探究桥墩的抗震特性及损伤状态;并探求了墩高、截面尺寸及跨度对于桥墩抗震特性的影响。研究结论:墩高增大、截面尺寸变小、梁长减小均能提高桥墩的抗震特性;损伤状态严重程度与墩顶位移大小变化一致,说明墩顶位移可以在一定程度上反映桥墩结构的损伤程度。In order to improve the seismic assessment efficiency of bridge piers,this paper builds a model based on Kunming urban rail transit through python programming and OpenSees,and uses Midas to verify the accuracy of the model.The difference between python calculation results and Midas results is within 9%,and the model is in good agreement.The displacement of pier top is calculated to investigate the seismic characteristics and damage state of pier.The influence of pier height,section size and span on the seismic characteristics of pier is also investigated.Research conclusions:The results show that increasing pier height,decreasing section size and decreasing beam length can improve the seismic characteristics of pier.The severity of damage state is consistent with the change of pier top displacement,indicating that pier top displacement can reflect the damage degree of pier structure to a certain extent.

关 键 词：桥墩抗震 城市轨道交通 PYTHON OPENSEES 损伤状态 

分 类 号：U44[建筑科学—桥梁与隧道工程]