ENHANCING PROGRESSIVE COLLPAPSE RESISTANCE OF RC BUILDING USING VISCOELASTIC DAMPERS

Parth D. Javia, Digesh D. Joshi, Paresh V. Patel

Abstract: Progressive collapse denotes a failure of large part of the structure, causing greater damage to the structure than the initial impact, which has been initiated by failure of a relatively small part of the structure such as failure of any vertical load carrying elements (typically columns). Failure of large part of any structure will results into substantial loss of human lives and natural resources. Therefore, it is important to prevent progressive collapse which is also known as disproportionate collapse. Generally, viscoelastic dampers are used for improving performance of building during earthquakes. In the present study, effect of viscoelastic dampers on progressive collapse resistance of 4-storey Reinforced Concrete (RC) building is evaluated. Linear static and linear dynamic analysis are performed by following U. S. General Service Administration (GSA) guidelines for evaluating progressive collapse potential. Modelling and analysis is performed using SAP2000 for two different threat independent column removal scenarios. Demand Capacity Ratio (DCR) is calculated as suggested by GSA guidelines. From the analysis results, it is observed that viscoelastic dampers significantly reduces DRC for beams and columns as well as considerably reduces displacement at the location of removed column.

Keywords: Progressive Collapse, Viscoelastic Dampers, Linear Static Analysis, Linear Dynamic Analysis, Demand Capacity Ratio (DCR)

DOI: https://doi.org/10.15623/ijret.2016.0532022