水电站地下厂房结构抗震计算方法探讨

›› 2014, Vol. 35 ›› Issue (S1): 319-327.

水电站地下厂房结构抗震计算方法探讨

张志国^{1, 2, 3}，杨阳^{2, 3}，牟春来¹，肖明^{2, 3}

1. 长江设计院，武汉 430010；2. 武汉大学水资源与水电工程科学国家重点实验室，武汉 430072； 3. 武汉大学水工岩石力学教育部重点实验室，武汉 430072

收稿日期:2013-07-26 出版日期:2014-06-10 发布日期:2014-06-20
作者简介:张志国，男，1984年生，博士研究生，工程师，主要从事岩土工程、地下工程等领域的设计科研工作
基金资助:
国家重点基础研究发展计划973项目资助（No. 2010CB732005）；国家自然科学基金重大研究计划资助（No. 91215301）；国家自然科学基金资助（No. 51279136，No. 51209164）；中央高校基本科研业务费专项资金资助（No. 2012206020203）

Discussion on seismic calculation methods of underground structure of hydropower station

ZHANG Zhi-guo^{1, 2, 3}, YANG Yang^{2, 3}, MOU Chun-lai¹, XIAO Ming^{2, 3}

1. Changjiang Design Institute, Wuhan 430010, China; 2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 3. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Education Ministry, Wuhan University, Wuhan 430072, China

Received:2013-07-26 Online:2014-06-10 Published:2014-06-20

摘要/Abstract

摘要： 地下结构是水电站地下厂房抗震设计的关键，我国现行规范尚未对其抗震设计方法作出明确规定。结合汶川地震中映秀湾地下厂房结构震灾调查，采用拟静力法、反应谱法和时程法分别进行结构受力计算。结果表明，3种方法均能在一定程度上反应映力荷载作用下地下结构的破坏情况，为抗震设计提供理论依据。拟静力法计算结果偏安全，但其对顶拱、牛腿等局部结构计算有一定不合理之处；反应谱法能展现结构的薄弱部位，便于抗震加固，但在与围岩接触的结构分析中存在较大误差；时程法能精细反映地下结构的地震受力过程，计算结果与震害调查吻合较好，便于更为经济的工程设计。建议对安全级别高、规模大或处于高地震烈度区域的地下厂房结构采用时程法进行计算。

关键词: 地下结构, 抗震计算, 拟静力法, 反应谱法, 时程法

Abstract: According to numerous in-situ investigations of earthquake disasters, it is widely regarded that underground structure is of key significance for seismic design of underground cavern. Since no specified simulation methods are definitely issued in the specifications for seismic design of hydraulic structures in China, three common seismic calculation methods of underground structure including quasi-static analysis method, response spectrum method and time-history method are discussed. Numerical calculation are conducted using these methods for underground powerhouse structures of Yingxiuwan hydropower station under Wenchuan earthquake; and calculation results are analyzed based on the in-situ investigation of earthquake disasters. The results show that three methods can reflect the dynamic failure of underground structures to some extent and provide a theoretical basis for the seismic design. It is also shown that the calculation results of the quasi-static analysis method is prior to more safer design and unreasonable for simulating top arch and corbel; response spectrum method can estimate weak parts of structure, but not exactly in interaction analysis of concrete structure and surrounding rock; time-history method is able to precisely simulate the seismic response process under the earthquake disaster; and calculation result is best consistent with in-situ investigation of earthquake disasters, which is better for precise and economic engineering design. Time-history method is suggested to be used for dynamic calculation for the underground powerhouse of high level security, large-scale or in high seismic intensity region.

Key words: underground structure, seismic calculation, quasi-static analysis method, response spectrum method, time-history method

中图分类号:

TV 731

张志国，杨阳，牟春来，肖明 , . 水电站地下厂房结构抗震计算方法探讨[J]. , 2014, 35(S1): 319-327.

ZHANG Zhi-guo , YANG Yang , MOU Chun-lai , XIAO Ming , . Discussion on seismic calculation methods of underground structure of hydropower station[J]. , 2014, 35(S1): 319-327.

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