西藏深覆盖层土石坝动力非线性分析  

Nonlinear Dynamic Analysis of Earth-rock Dam on Deep Overburden in Tibet

作　　者：吴悦 郭永刚 胡锦 WU Yue;GUO Yonggang;HU Jin(Water Conservancy Project&Civil Engineering College,Tibet Agriculture&Animal Husbandry University,Nyingchi Tibet,860000,China)

机构地区：[1]西藏农牧学院水利土木工程学院

出　　处：《高原农业》2020年第1期69-74,107,共7页Journal of Plateau Agriculture

基　　金：水沙科学与水利水电工程国家重点实验室开放基金资助（sklhse-2015-D-01）;西藏自治区重点科研计划项目（2016XZ01G30）

摘　　要：西藏地处高海拔高地震烈度高寒区,河谷覆盖层较深,修建大坝与低海拔地区相比存在诸多特殊问题。本文以已建的西藏旁多土石坝结构为研究对象,考虑其深覆盖层悬挂式防渗墙结构特点,采用沈珠江等效粘弹性模型、利用非线性有限元仿真分析方法对其建立三维模型进行结构抗震响应数值分析。对坝体结构典型截面、典型部位的计算结果进行了分析、比较,研究了西藏旁多大坝结构在地震荷载作用下的抗震性能。分析结果为西藏旁多土石坝结构的安全运行与管理提供了参考。Tibet is located in a high altitude and high seismic intensity and high cold region with deep overburden of river valley. There are many special problems in building dams compared to low-altitude areas. Taking the structure of the existing earth-rock dam near Tibet as the research object and considering the structural characteristics of the deep overburden suspended cut-off wall, a three-dimensional model for numerical analysis of structural seismic response was established using the Shen Zhujiang equivalent viscoelastic model and nonlinear finite element simulation analysis methods. The calculation results of the typical sections and typical parts of the dam structure are analyzed and compared, and the seismic performance of the dam structure near Tibet under seismic loading is also studied. The analysis results provide a reference for the safe operation and management of the multi-soil dam structure in Tibet.

关 键 词：西藏地区 深覆盖层 土石坝 非线性动力分析 

分 类 号：TV312[水利工程—水工结构工程]