景洪升船机上闸首非线性有限元极限抗震分析  

Nonlinear Finite Element Ultimate Seismic Analysis of Lock Head on Jinghong Ship Lift

作　　者：代敏 叶恩立 DAI Min;YE En-li(Power China Kunming Engineering Corporation Limited,Kunming 650051,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南昆明6500041

出　　处：《云南水力发电》2021年第11期14-18,共5页Yunnan Water Power

摘　　要：对景洪水电站水力式升船机上闸首,以基岩水平峰值加速度0.35g作为设计地震,按规范给出的标准设计反应谱生成的人工地震波作为地震动输入,并分别在此基础上放大1.2和1.4倍,建立三维有限元模型采用时程法进行动力分析,并采用非线性损伤本构模型来考虑坝体损伤区域的应力释放和混凝土在承载后出现的软化效应,分析了升船机上闸首在上下游正常蓄水位时坝体的地震响应。根据混凝土损伤区域判断升船机上闸首整体抗震能力,以出现贯通性损伤区确定上闸首抗震极限。For the upper lock head of hydraulic ship lift in Jinghong Hydropower Station,this paper takes 0.35g horizontal peak acceleration of bedrock as design earthquake,and artificial seismic wave generated by standard design response spectrum given in the code as seismic input.On this basis,amplified by 1.2 and 1.4 times respectively,three-dimensional finite element model is established for dynamic analysis by time-history method and non-linear damage constitutive model.The non-linear damage constitutive model is used to consider the stress release in the damaged area of the dam body and the softening effect of concrete after bearing.The seismic response of the dam body when normal water level is stored at upstream and downstream of the upper lock head of the ship lift is analyzed.The overall seismic capacity of the upper lock head of the ship lift is judged according to the damaged area of concrete so that the seismic limit of the upper lock head is determined.

关 键 词：水力式升船机 上闸首 时程法 非线性 极限 抗震 

分 类 号：U642.2[交通运输工程—船舶及航道工程]