Numerical analysis on the influence of thickness of liquefiable soil on seismic response of underground structure

2010 ◽  
Vol 15 (3) ◽  
pp. 279-284 ◽  
Author(s):  
Zhi-fan Xia ◽  
Guan-lin Ye ◽  
Jian-hua Wang ◽  
Bin Ye ◽  
Feng Zhang
Keyword(s):  
Numerical Analysis ◽  
Seismic Response ◽  
Underground Structure ◽  
Liquefiable Soil

Numerical research on seismic response characteristics of shallow buried rectangular underground structure

2019 ◽  
Vol 116 ◽  
pp. 242-252 ◽  
Author(s):  
Zigang Xu ◽  
Xiuli Du ◽  
Chengshun Xu ◽  
Hong Hao ◽  
Kaiming Bi ◽  
...  
Keyword(s):  
Seismic Response ◽  
Underground Structure ◽  
Response Characteristics ◽  
Numerical Research

Influence of Ground Structure on the Seismic Response of Underground Subway Station in Soft Site

2011 ◽  
Vol 368-373 ◽  
pp. 2769-2775 ◽  
Author(s):  
Hui Long ◽  
Guo Xing Chen ◽  
Hai Yang Zhuang
Keyword(s):  
Seismic Response ◽  
Underground Structure ◽  
Outer Part ◽  
Subway Station ◽  
Analysis Model ◽  
Ground Structure ◽  
Element Analysis ◽  
High Rise ◽  
Underground Subway Station ◽  
Subway Stations

This paper selected representative soft site along the subway lines and created two-dimensional overall finite element analysis model about nonlinear dynamic interaction among soil, underground subway station, and ground structure based on Nanjing underground subway station. It explored the seismic response influence of neighboring high-rise structure on the two-layer and three-span island-type underground subway stations. The results showed that the structure near the subway station had a significant constraint effect on the deformation of subway station which is oriented to the structure, and the influence of deformation of subway station which is backward to the structure is related to vibration characteristics of the soil-underground structure interaction system. The influence of neighboring ground structure on the strain stress response of subway station is useful in most part of important nodes. However, this influence is disadvantageous in the outer part of connections of side walls and plates and middle plate-interior column connections.

Study on Effect of Seismic Joint to Seismic Response of Tunnel Passing through Fault

2013 ◽  
Vol 482 ◽  
pp. 252-255 ◽  
Author(s):  
Feng Gao ◽  
Xiao Gang Shu ◽  
Dian Li Xue ◽  
Jiao Liu
Keyword(s):  
Seismic Response ◽  
Underground Structure ◽  
Element Model ◽  
Separation Distance ◽  
Practical Significance ◽  
Seismic Resistance ◽  
Response Analysis ◽  
Analysis Model ◽  
Fault Fracture Zone ◽  
Tunnel Depth

As underground structure, the tunnel itself has good anti-seismic performance, but in recent years, according to a large number of investigation data about the earthquake disaster for tunnel, we find that the tunnel passing through the fault fracture zone is quite easy to be destroyed seriously. Therefore, developing dynamic response analysis and shock absorption measures has great practical significance. According to the characteristics of tunnel passing through fault and the tunnel depth, considering a certain proportion relationship in finite element model, the analysis model for tunnel seismic joint is established. Finally comparing the results comprehensively, we discuss the effect of the different setting location and setting separation distance of seismic joint to seismic response of tunnel passing through fault. From the work we have done, we get the seismic joint which is good for tunnel seismic resistance. This method is expected to be adopted as reference to the similar projects.

Experimental Study on the Seismic Response of Subway Station in Soft Ground

2017 ◽  
Vol 11 (05) ◽  
pp. 1750020 ◽  
Author(s):  
Ma Xianfeng ◽  
Wang Guobo ◽  
Wu Jun ◽  
Ji Qianqian
Keyword(s):  
Seismic Response ◽  
Seismic Design ◽  
Shaking Table Test ◽  
Design Method ◽  
Underground Structure ◽  
Response Characteristic ◽  
Shaking Table ◽  
Subway Station ◽  
Soft Ground ◽  
Shaking Table Tests

Shaking table tests were conducted on typical models of subway structures subjected to several seismic shaking time histories to study seismic response of subway structures in soft ground as well as to provide data for validation of seismic design methods for underground structure. Three types of tests were presented herein, namely green field test, subway station test, and test for joint structure between subway station and tunnel. The similitude and modeling aspects of the 1g shaking table test are discussed. The seismic response of Shanghai clay in different depths was examined under different input waves to understand the acceleration amplification feature in both green field and in the presence of underground structure. Damage situation was checked on internal sections of both subway station and tunnels by halving the model structure. Structure deformation was investigated in terms of element strain under different earthquake loadings. The findings from this study provides useful pointers for future shaking table tests on underground structures/facilities, and the seismic response characteristic of underground structure derived from the shaking table test could be helpful for validating seismic design method for subway station.

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