基于耐震时程法的浅埋压力箱涵结构抗震分析  

Seismic Analysis of Shallow-buried Pressure Box Culvert Structure Based on Endurance Time Analysis

作　　者：宋宸 任旭华[1] 张继勋[1] 项勋 SONG Chen;REN Xuhua;ZHANG Jixun;XIANG Xun(College of Hydrology and Water Resources,Hohai University,Nanjing 210024,Jiangsu,China)

机构地区：[1]河海大学水利水电学院,江苏南京210024

出　　处：《水力发电》2023年第11期60-66,119,共8页Water Power

基　　金：中央高校基本科研业务费专项(B220204001);云南省重大科技专项计划(202102AF080001)。

摘　　要：为研究浅埋压力箱涵在地震作用下的结构安全状况并提高其计算分析效率,采用耐震时程法对其结构进行极限抗震分析。根据耐震时程法基本原理并结合规范要求,基于目标反应谱优化生成3条耐震时程加速度曲线,以某浅埋压力箱涵为例,建立三维数值分析模型,并考虑箱涵有内水压力与无内水压力2种不同工况,采用ABAQUS对其进行非线性动力计算,研究箱涵在不同地震强度下的位移、变形及损伤情况。结果表明,耐震时程法具有较高计算效率,能较好地预测压力箱涵在不同地震强度下的动力响应情况以及压力箱涵在不同工况下的损伤发展情况,可为类似工程抗震设计提供参考。In order to study the structural safety of shallow-buried pressure box culvert under earthquake and improve its computational and analysis efficiency,the endurance time method is used to carry out the ultimate seismic analysis of structure.According to the basic principle of the endurance time method and the requirements of specification,three endurance time acceleration curves are optimized based on the target response spectrum.Taking a shallow-buried pressure box culvert as an example,a three-dimensional numerical analysis model is established to study the displacement,deformation and damage of the box culvert under different seismic intensities considering two different working conditions of the box culvert with internal water pressure or without internal water pressure by the nonlinear dynamic calculation based on ABAQUS.The results show that the endurance time method has high calculation efficiency,and can better predict the dynamic response of pressure box culvert under different seismic intensities and the damage development of pressure box culvert under different working conditions,which can provide reference for the seismic design of similar projects.

关 键 词：引水工程 结构抗震 浅埋压力箱涵 混凝土损伤 动力响应 耐震时程法 

分 类 号：TV672.1[水利工程—水利水电工程] TV312