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Anshul Sharma
Vinod Kumar Modi
Keywords:
Retrofitting, Reinforced Cement Concrete Jacketing, Steel Bracing, Non-Destructive Test, Seismic analysis, ETABS.
Abstract:
India, being the second most populous country in the world has a high demand for infrastructure to serve its people. India is one of the most earthquake-prone countries in the world and has experienced several major or moderate earthquakes during the last 15 years. Existing buildings in these earthquake-prone zones require protection and adequate performance against seismic events. Therefore, retrofitting becomes crucial, as it enhances the safety and performance levels of existing buildings over the long term.
This research examines the seismic performance of an assumed existing building proposed for retrofitting by comparing two unique retrofitting methods: RCC jacketing and steel bracing. The study evaluates the benefits and drawbacks of each method to determine the most effective approach.
For this Purpose, A 25 year old RCC-Residential Building with Special Moment Resisting Frame having Stilt+10 story, in seismic zone 4, constructed as per the requirement of IS 1893:2002 is considered.
After the Static & Dynamic analysis as per IS 15988: 2013 and IS 1893: 2016 of existing structure with two different retrofitting techniques i.e providing X type bracing at periphery and concrete jacketing of columns, the results indicate that story displacement decreases by approximately 90% with the bracing system, compared to a 20% reduction using the column RCC jacketing system. Additionally, the inter-story drift decreases by about 93% with the bracing system, compared to a 33% reduction with column RCC jacketing. Retrofitting the structure by providing X bracing around the periphery significantly increases stiffness. The base shear and story forces show negligible increases in the retrofitted structure compared to the existing condition. The findings advance the knowledge of sustainable construction by extending the lifespan of structures, thereby saving costs, time, and materials.
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International Journal of Recent Research and Review
ISSN: 2277-8322
Vol. XVII, Issue 2
June 2024
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PUBLISHED
June 2024
ISSUE
Vol. XVII, Issue 2
SECTION
Articles
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