Retrofitting of Soft Storey Building by using Different Bracing System due to Seismic Load

Abstract In the present study an attempt has been made to evaluate an existing building located in seismic zone V using equivalent static analysis. Indian Standard IS-1893:2002 (Part-1) is followed for the equivalent static analysis procedure. Building is modeled in commercial software STAAD Pro. Seismic force demand for each individual member is calculated for the design base shear as required by IS-1893:2002. Corresponding member capacity is calculated as per Indian Standard IS456:2000. Deficient members are identified through demand-to-capacity ratio. A number of beams and column elements in the first floor of the present building are found to be deficient that needs retrofitting. A local retrofitting strategy is adopted to upgrade the capacity of the deficient members. This study shows that steel jacketing is an efficient way to retrofit RC members to improve flexure as well as shear capacity.

Keywords RETROFITT, Earthquake, Composite, Conventional, Frame, Steel, Reinforced Concrete, Structure, Multi-storey, SMRF, Framed structures, Maximum Axial Force, STAAD PRO.(V8i) series 4.

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Engineering Journal: Retrofitting of Soft Storey Building by using Different Bracing System due to Seismic Load

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