›› 2012, Vol. 33 ›› Issue (9): 2869-2874.

• Testing Technology • Previous Articles     Next Articles

Dynamic analysis of urban underground space structure subjected to surface explosion

WANG Xiao-rui1, 2, ZHANG Shu-jun3, HUANG Zhi-quan1   

  1. 1. School of Resources and Environment Engineering, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China; 2. College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China; 3. School of Civil Engineering, Nanyang Institute of Technology, Nanyang, Henan 473004 China
  • Received:2012-05-11 Online:2012-09-11 Published:2012-09-12

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Abstract: In order to study the dynamic response of subway station structure subjected to surface ground explosion, a simplified model of airblast forces is demonstrated in detail. Whereafter, the improved concrete dynamic Cam-Clay model of soil and the concrete damaged plasticity constitutive model are used for the dynamic analysis of subway station when 100 kg TNT detonates on ground surface. Meanwhile, the influences of soil stiffness and buried depth on dynamic response of subway station are taken into consideration. Finally, the dynamic response of station structural subjected to far-field explosion wave is analyzed. The results show that, the central roof of station has small tension damage. When the buried depth is less than 5 m, the dynamic stress is larger. The smaller the covering soil stiffness is, the more energy of the explosion the covering soil absorb. As the frequency of the explosion waves is very larger, the dynamic stress of the station subjected to far-field explosion wave is smaller. The results will be benefit anti-explosion design of underground structures.

Key words: subway station, surface explosion, airblast forces, dynamic response

CLC Number: 

  • TU 432
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