| An improved pseudo-static method for seismic resistant design of underground structures |
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| 作者姓名： | 刘如山 石宏彬 |
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| 作者单位： | [1]Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China [2]Heilongjiang Institute of Technology, Harbin 150050, China |
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| 摘 要： | This paper describes a commonly used pseudo-static method in seismic resistant design of the cross section of underground structures. Based on dynamic theory and the vibration characteristics of underground structures, the sources of errors when using this method are analyzed. The traditional seismic motion loading approach is replaced by a method in which a one-dimensional soil layer response stress is differentiated and then converted into seismic live loads. To validate the improved method, a comparison of analytical results is conducted for internal forces under earthquake shaking of a typical shallow embedded box-shaped subway station structure using four methods： the response displacement method, finite element response acceleration method, the finite element dynamic analysis method and the improved pseudo-static calculation method. It is shown that the improved finite element pseudo-static method proposed in this paper provides an effective tool for the seismic design of underground structures. The evaluation yields results close to those obtained by the finite element dynamic analysis method, and shows that the improved finite element pseudo-static method provides a higher degree of precision.
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| 关 键 词： | 地下结构 抗震设计 改进伪静力法 有限元法 地震反应 动力学分析 |
| 文章编号： | 1671-3664（2006）02-0189-05 |
| 收稿时间： | 2005-11-18 |
| 修稿时间： | 2006-04-08 |
An improved pseudo-static method for seismic resistant design of underground structures |
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| Rushan Liu,Hongbin Shi.An improved pseudo-static method for seismic resistant design of underground structures[J].Earthquake Engineering and Engineering Vibration,2006,5(2):189-193. |
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| Authors: | Rushan Liu Hongbin Shi |
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| Institution: | 1. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
2. Heilongjiang Institute of Technology, Harbin 150050, China |
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| Abstract: | This paper describes a commonly used pseudo-static method in seismic resistant design of the cross section of underground structures. Based on dynamic theory and the vibration characteristics of underground structures, the sources of errors when using this method are analyzed. The traditional seismic motion loading approach is replaced by a method in which a one-dimensional soil layer response stress is differentiated and then converted into seismic live loads. To validate the improved method, a comparison of analytical results is conducted for internal forces under earthquake shaking of a typical shallow embedded box-shaped subway station structure using four methods: the response displacement method, finite element response acceleration method, the finite element dynamic analysis method and the improved pseudo-static calculation method. It is shown that the improved finite element pseudo-static method proposed in this paper provides an effective tool for the seismic design of underground structures. The evaluation yields results close to those obtained by the finite element dynamic analysis method, and shows that the improved finite element pseudo-static method provides a higher degree of precision. |
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| Keywords: | underground structures seismic design finite element method pseudo-static method dynamic analysis method |
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