Seismic Risk Assessment of Soft-Story Buildings Using a Pushover Analysis Approach

Year : 2024 | Volume : 11 | Issue : 03 | Page : 20 35
    By

    Dhiraj D. Ahiwale,

  • Vinay V. Chavan,

  • Rushikesh R. Khartode,

Abstract

In urban India, reinforced concrete buildings with open ground stories designed for parking purposes
are quite prevalent. These soft-story structures have faced severe damage and even total collapse during
significant earthquakes in various regions, including the 1999 Taiwan earthquake, the 1999 Turkey
earthquake, the 2003 Algeria earthquake, and the 2001 Bhuj earthquake, where approximately 1,500
medium-rise open ground-story buildings demonstrated extreme vulnerability. Given this vulnerability,
the primary objective of this study is to conduct an initial seismic risk assessment of these ground-level
soft stories, as stipulated by the Indian code IS 1893 (Part-1)-2016. When dealing with structures
exhibiting soft-story irregularities, it is strongly recommended to employ the pushover analysis method.
To carry out this analysis, we examined G+11 reinforced concrete-framed buildings featuring infill
walls and open ground floors, subjecting them to progressively increasing lateral forces until reaching
a predefined performance level, known as the target displacement. The outcomes of the pushover
analysis were then translated into a performance point, capacity curve, and plastic hinge pattern for
the structure, facilitating an initial assessment of its seismic risk.

Keywords: Soft story, infill, pushover analysis, capacity curve, plastic hinge pattern.

[This article belongs to Journal of Structural Engineering and Management ]

How to cite this article:
Dhiraj D. Ahiwale, Vinay V. Chavan, Rushikesh R. Khartode. Seismic Risk Assessment of Soft-Story Buildings Using a Pushover Analysis Approach. Journal of Structural Engineering and Management. 2024; 11(03):20-35.
How to cite this URL:
Dhiraj D. Ahiwale, Vinay V. Chavan, Rushikesh R. Khartode. Seismic Risk Assessment of Soft-Story Buildings Using a Pushover Analysis Approach. Journal of Structural Engineering and Management. 2024; 11(03):20-35. Available from: https://journals.stmjournals.com/josem/article=2024/view=185209


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Regular Issue Subscription Original Research
Volume 11
Issue 03
Received 04/09/2024
Accepted 13/10/2024
Published 19/10/2024
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