地铁车站抗震分析
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摘要
首先选取了车站主体结构建立合适的有限元模型,并进行静力分析,然后分别采用了谱分析和动力时程分析两种不同的计算方法对车站进行抗震计算分析,对谱分析计算、谱分析和时程分析的计算结果分别予以对比,得出在水平地震力作用下车站结构的最不利受力位置。主要结论包括:地铁车站结构的弯矩在静力时较小,在地震作用下其增幅较大,动力响应显著。地铁结构需要进行抗震计算,反应位移法、动力时程分析法均能适用于地下建筑结构的抗震分析。在水平地震力作用下,地铁车站结构中柱的地震轴力较大,是主要的承压构件,结构顶板的变形和应力比较大,容易发生破坏。因此在设计和施工过程中,应对上述部位予以足够的重视。
In this paper,the main station structure is selected to establish finite element numerical modeling for static analysis.Then seismic response is analyzed with two different calculating ways,reaction spectral analysis and time-history analysis.Comparing the static calculation result to reaction spectral,reaction spectral to time-history,the author finds the max stressing place of the station structure in horizontal seismic force.The main conclusions of this study could be summarized as follows: The bending moment of structure is small under static action,and increases quickly under seismic action.The station structure must be calculated by seismic analysis.Response displacement method,dynamic time-history analysis method can be applied to seismic analysis of underground construction.The axial pressure of column is big,under seismic action,at the top of structure;the stress and strain are bigger than other points,the top of structure and are very incidental to be destroyed.As a result,in the course of designing and construction,more attention should be paid to them.
In this paper,the main station structure is selected to establish finite element numerical modeling for static analysis.Then seismic response is analyzed with two different calculating ways,reaction spectral analysis and time-history analysis.Comparing the static calculation result to reaction spectral,reaction spectral to time-history,the author finds the max stressing place of the station structure in horizontal seismic force.The main conclusions of this study could be summarized as follows: The bending moment of structure is small under static action,and increases quickly under seismic action.The station structure must be calculated by seismic analysis.Response displacement method,dynamic time-history analysis method can be applied to seismic analysis of underground construction.The axial pressure of column is big,under seismic action,at the top of structure;the stress and strain are bigger than other points,the top of structure and are very incidental to be destroyed.As a result,in the course of designing and construction,more attention should be paid to them.
引文
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2张庆贺,朱合华,庄荣,等.地铁与轻轨[M].北京.人民交通出版社,2002
3郭陕云.论我国隧道和地下工程技术的研究和发展[J].现在隧道技术,2004(5)
4于翔.地铁建设中应充分考虑抗震作用—阪神地震破坏的启示[J].铁道建筑技术,2006(6)
5杨春田.日本阪神地震地铁工程的抗震分析[J].工程抗震,1996(2)
6王瑞民,罗奇峰.阪神地震中地下结构和隧道的破坏现象浅析[J].灾害学,1998(2)
7于翔.地铁建筑结构应充分考虑抗震问题—1995年阪神地震破坏的启示[J].工程抗震.2004,(5)
8郑永来,杨林德.地下结构抗震[M].上海.同济大学出版社,2007
9阎盛海.地下结构抗震[M].大连.大连理工出版社,1989
10王松涛,曹资.现代抗震设计方法[M].北京.中国建筑工业出版社,1997
11郑永来,杨林德.地下结构震害与抗震对策[J].工程抗震,1999(4)
12孙钧,侯学渊.地下结构1[M].北京.科学出版社,1987
13施仲衡,张弥,王新杰.地下铁道设计与施工[M].西安.陕西科学技术出版社,1997
14林皋.地下结构抗震分析综述[J].世界地震工程,1990(1～10)
15谢康和,周健.岩土工程有限元分析理论与应用[M].北京.科学出版社,2002
16刘品波.结构—地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998(31)
17黄先锋.地下结构的抗震计算—位移响应法[J].铁道建筑,1998(6)
18韩文星.软土地铁车站结构横向抗震设计方法研究[D].上海:同济大学,2005
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