Mechanism Analysis of Wenchuan Earthquake Damage to Building Foundation

Abstract:

Wenchuan Earthquake destroyed a large number of buildings and induced a lot of causalities and many secondary geological disasters such as rock fall, landslide, debris flow and damming lake. Based on the geological structure of Wenchuan and a detailed field investigation of housing damage and secondary geological disasters, the earthquake damage to the building foundation is analyzed from the seismic response and failure mechanism. The main failure modes of house construction and foundation are summed up in earthquake. From the point of interaction of soil and structure, the corresponding earthquake disaster prevention and mitigation measures are proposed based on the classification of rigid and flexible foundations. Meanwhile, the classification treatment and division prevention are pointed out from the economical prespect.

Key words:earthquake; construction foundation; earthquake response; failure mechanism; prevention concept