›› 2011, Vol. 32 ›› Issue (2): 403-0410.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Evaluation criteria of landslide hazards induced by Wenchuan earthquake using fuzzy mathematical method

WANG Xiu-ying1, NIE Gao-zhong2, WANG Song3   

  1. 1.Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China; 2. Institute of Geology, China Earthquake Administration, Beijing 100029, China; 3. China Earthquake Network Center, Beijing 100045, China
  • Received:2010-05-10 Online:2011-02-10 Published:2011-02-16

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Abstract:

The Newmark accumulated displacement evaluation model was built based on the ground motion data obtained from the Wenchuan main shock distributed along the Longmenshan area. The fuzzy membership functions were used to calculate the degree of memberships when an accumulated displacement was obtained from the evaluation model; and the grade of landslide risks can be decided with the help of the degree of memberships. To quantify the evaluation results, the fuzzy conversion approach was used to convert the degree of memberships into a probabilistic number; and by this way, more depth calculation can be carried out. As an example, the landslides distribution induced by the Wenchuan earthquake was given to compare with the evaluation results, which show the evaluation model and the quantified probabilistic numbers calculated for each region are fit well with the real case. Analysis shows it is more accurate to describe the regional landslides hazards distribution in probabilistic way, which can be achieved by the fuzzy mathematical method.

Key words: earthquake-induced landslide, evaluation model, ground motion parameter, membership function, fuzzy conversion

CLC Number: 

  • P 315.0
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