Finite element models to represent seismic activity of the Indian plate

作     者：S.Jayalakshmi S.T.G.Raghukanth 

作者机构：Department of Civil EngineeringIndian Institute of TechnologyMadras 600036India 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2017年第8卷第1期

页      面：81-91页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：The authors thank the anonymous reviewers for their careful reading and the constructive criticisms. The reviewers’ suggestions have made a lot of improvement to the contents of the article 

主　　题：Indian platePlate driving forcesFinite element modeSeismicityCratons 

摘      要：Quantification of seismic activity is one of the most challenging problems faced by earthquake engineers in probabilistic seismic hazard analysis. Currently, this problem has been attempted using empirical approaches which are based on the regional earthquake recurrence relations from the available earth- quake catalogue. However, at a specified site of engineering interest, these empirical models are asso- ciated with large number of uncertainties due to lack of sufficient data. Due to these uncertainties, engineers need to develop mechanistic models to quantify seismic activity. A wide range of techniques for modeling continental plates provides useful insights on the mechanics of plates and their seismic activity. Among the different continental plates, the Indian plate experiences diffused seismicity. In India, although Himalaya is regarded as a plate boundary and active region, the seismicity database indicates that there are other regions in the Indian shield reporting sporadic seismic activity. It is expected that mechanistic models of Indian plate, based on finite element method, simulate stress fields that quantify the seismic potential of active regions in India, This article explores the development of a finite element model for Indian plate by observing the simulated stress field for various boundary conditions, geological and theological conditions. The study observes that the magnitude and direction of stresses in the plate is sensitive to these conditions, The numerical analysis of the models shows that the simulated stress field represents the active seismic zones in India.