›› 2009, Vol. 30 ›› Issue (S1): 37-40.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Discussion on seismic failure of rock mass in meizoseismal areas

LIANG Qing-guo1, HAN Wen-feng2, LI Xue-feng2   

  1. 1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; 2. Department of Civil Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China
  • Received:2009-04-20 Online:2009-08-10 Published:2011-03-16

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Abstract:

Tremendous geological hazards are induced by strong earthquake at the meizoseismal area of the Wenchuan Earthquake, May 12, 2008. The rock mass seismic failures caused by strong ground motions are mainly responsible for that. The problem of rock mass seismic failure under ground motions at meizoseismal area is discussed regard of meaning of meizoseismal area, characteristics of ground motions, definition of rock mass seismic failure, seismic dynamo-relaxed rock mass and methodology. Meizoseismal area is a potential earthquake region of the future earthquake, in which the direct-underground earthquake would happen. The ground motions at meizoseismal area have some characteristics totally different from that outside of the meizoseismal area. It is significant to understand the meaning of rock mass seismic failure at meizoseismal areas considering the nondeterministic characteristics of ground motions. Seismic dynamo-relaxed rock mass is a special type of rock mass seismic failure at meizoseismal areas damaged by ground motions, and it is an important factor causing secondary hazard after earthquakes. The concepts, methods and techniques of related subjects such as rock mass mechanics, engineering geology etc., have laid a good foundation for studying rock mass seismic failure under ground motions at meizoseismal areas whose tasks and aims will be to predict and assess engineering earthquake damage and geological hazards induced by rock mass seismic failure as well as to reduce and to prevent the losses during the future earthquakes.

Key words: Wenchuan Earthquake, meizoseismal area, seismic failure of rock mass

CLC Number: 

  • TU 457
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