Revision of IS 1893: Proposal for an Alternative Soil Classification Scheme and Associated Intensity-Dependent Spectral Amplification Factors
Publication: Natural Hazards Review
Volume 23, Issue 2
Abstract
This paper provides an improved soil classification scheme and associated spectral acceleration response curves along with the site amplification factors for the ongoing revision of IS 1893 Part-1 [BIS (Bureau of Indian Standards). 2016. Criteria for earthquake resistant design of structures. IS 1893-1. New Delhi, India: BIS]. A ground response analysis of 124 sites across India is conducted using the nonlinear procedure of DEEPSOIL. In addition to the classical geotechnical parameters , , and plasticity index (PI), the improved soil classification scheme also uses the fundamental period of a site () and the average shear wave velocity to the seismic bedrock, instead of only . New site amplification factors (i.e., and ) are proposed for all site classes of the improved soil classification scheme and compared with the amplification factors of other national codes. Further, elastic design response spectra are proposed for the improved soil classification scheme by considering the proposed site amplification factors (i.e., and ). The compatibility of the proposed elastic design response spectra with other national codes’ design spectra is further evaluated.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The financial assistance provided by the Science and Engineering Research Board (SERB), a statutory body of the Department of Science and Technology (DST), Government of India, under the Early Career Research Award ECR/2016/001316, is gratefully acknowledged. The authors are thankful to the editor and the two anonymous reviewers for a comprehensive review and valuable comments and suggestions to improve the manuscript.
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Natural Hazards Review
Volume 23 • Issue 2 • May 2022
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© 2022 American Society of Civil Engineers.
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Received: Apr 1, 2021
Accepted: Dec 29, 2021
Published online: Feb 22, 2022
Published in print: May 1, 2022
Discussion open until: Jul 22, 2022
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