Anbazhagan, P and Ashwini, P R and Kamath, Kiran (2014) An empirical model for the prediction of significant duration in India. In: Proceedings of the First Annual Conference on Innovations and Developments in Civil Engineering, , 19-20 May 2014 , NITK, Surathkal, India..

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Abstract

The duration of the strong earthquakeground motion is one of the mainparameters in seismic design, as it creates cyclic loading on the structural system, which inturn can cause damage to the structure. Therefore, it becomes necessary to estimate theduration of strong motion as a part of seismi c hazard assessment. This study proposes asimple empirical model derived from recorded ground motion data of the Himalayanregion of North India. Out of various duration parameters defined in the literature, the significant duration is chosen in this study. It is the measure of the damage potential of anearthquake occurring in a region, defined as thetime interval between which the specifiedvalue of Arias Intensity is reached.The m odel has been developed using 914 accelerograms recorded from 1986 to 2013 and by regressionanalysis. The result obtained from theproposed model has been compared with the observed data a and it is found that the model d it is found that the modelcan predict the earthquake ground motion duration precisely.

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