土工基础 ›› 2020, Vol. 34 ›› Issue (4): 474-478.

• 专题论述 • 上一篇    下一篇

高海拔地区土石坝结构抗震性能动力分析

廖桄辰,汪仕情,魏建飞,郭永刚,王培清   

  1. (西藏农牧学院水利土木工程学院,西藏林芝 860000)
  • 收稿日期:2019-08-22 修回日期:2019-09-05 出版日期:2020-08-20 发布日期:2020-08-15
  • 通讯作者: 王培清(1972-),男,教授,博士,研究方向为岩土工程、水工结构及土木工程试验。
  • 作者简介:廖桄辰(1993-),男,硕士研究生,研究方向为岩土工程方面。
  • 基金资助:
    西藏自治区科技厅重点项目(颗粒混合)XZ 2019ZR G-56(Z);西藏农牧学院第五届研究生创新支持计划项目(藏东南地区砂卵石路基动力特性研究)YJS2019-11

Analysis of Seismic Performance of Earth & Rock Filled Dams In High Altitude Area

LIAO Guangchen, WANG Shiqing, WEI Jianfei, GUO Yonggang, WANG Peiqing   

  1. (College of Water Conservancy and Civil Engineering, Tibet Agricultural and Animal Husbandry University, Nyingchi 860000)
  • Received:2019-08-22 Revised:2019-09-05 Online:2020-08-20 Published:2020-08-15

摘要: 详细概括了西藏旁多土石坝结构抗震性能动力分析基本原理,分别从西藏旁多土石坝的结构抗震能力反应谱分析与基本原理、大坝结构抗震能力时域分析与基本原理以及地震作用下西藏旁多土石坝结构破坏的能量判别准则等三个方面进行了总结。提出地震作用下西藏旁多土石坝动力失稳破坏的能量判断准则以及地震失稳风险值的概念,并将其应用于西藏旁多土石坝的二维结构抗震性能分析之中,以此来模拟地震发生时,坝体加速度、最大动剪应变、最大主应力以及最大动位移等参数对大坝安全性能的影响,得出与实际相符的结论。

关键词: 抗震性能, 反应谱, 时域分析

Abstract: This paper presents the principles of the analysis on the seismic performance of the earth and rock filled dams in Poindo, Tibet. The seismic response spectrum, seismic capacity of the dam structures and the required energy in earth and rock filled dam at failure are also summarized in the paper. The concepts of energy criteria for the seismic stability and the risk potential for the seismic failure for the Piondo earth and rock filled dams are also proposed and these concepts are used in the seismic analyses of the two dimensional structures such as dams in order to evaluate factors such as, the acceleration in dam, maximum seismic shear strain, maximum principal stress and maximum seismic deflection, on the dam safety. The results are proved to be reasonable.

Key words: Seismic Performance, Response Spectrum, Time Domain Analysis

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