RETROFITTING OF RCC STRUCTRAL MEMBERS USING CONCRETE JACKETING

Abstract

There are two major categories of retrofit options for concrete structure; local and global methods. Local methods focus at the element level on a particular member that is deficient and in improving it to perform better. These methods include adding concrete, steel, or composite to the outside of the member. All three methods are effective but each present some disadvantages: concrete is labour intensive, steel requires heavy construction equipments, and composites have high initial cost. The present work attempts to study the effectiveness of concrete jacketing for seismic strengthening of beams failing under flexure. In this study, a sample G+4 storied building is modelled in ETABS and placed in seismic zone V. Response Spectrum Analysis (RSA) was carried out and the design of beams was done as per IS:456-2000. A comparison study was carried out between the performance of the beams pre and post retrofitting to evaluate the positive effect of the section enlargement as a seismic retrofitting techniques .