SEISMIC EVALUATION OF EXISTING BUILDING & STRENGTHENING TECHNIQUES
CH.KIRAN KUMAR
PG Scholar, Department of Civil Engineering, KITS Warangal , IN
Dr.S SUNIL PRATAP REDDY
PG Scholar, Department of Civil Engineering, KITS Warangal , IN
SUMANTH KUMAR B
PG Scholar, Department of Civil Engineering, KITS Warangal , IN
Keywords: Seismic Zoning, Seismic Assessment, Rehabilitation, Retrofitting Techniques, RCC Jacketing
Abstract
Recent earthquakes in the Indian subcontinent have led to an increase in the seismic zoning factor over many parts of the country. Many existing buildings require a seismic assessment for various reasons, such as noncompliance with code requirements, code updates, poor design practices and changes in building usage. However, the existing insufficient structure can be upgraded with some rehabilitation to maintain the expected level of performance. This paper presents the seismic evaluation of the existing building of G+3 RCC structure subjected to Zone-II level earthquake forces. Building is modeled in 3D software. The existing structures are analyzed and designed as per IS 1893-1984, 1893-2002 and the design is compared as per two codal provisions also with the existing designed structural details. Retrofitting techniques are applied to the existing building for the non-compliance elements. To improve the performance of deficient members, a local retrofitting strategy is adopted. This study shows that the RCC jacketing is an efficient way to retrofit RC members to improve flexure as well as shear capacity
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