SEISMIC RETROFITTING OF AN EXISTING STRUCTURE

Amritha Ranganadhan, Anju Paul

Abstract: Retrofitting an existing building is often considered to be more cost-effective than constructing a new building. It represents an opportunity to upgrade the overall performance, sustainability and efficiency of an existing building. Seismic retrofitting is mainly done to provide existing structures with more resistance to seismic activity due to earthquake. Earthquake creates great devastation in terms of life, money and failure of structures. Therefore, increasing the seismic resistance of structures is of utmost importance, especially in case of old structures, and tall or expensive structures. When a building has been designed according to a seismic code, but the code has been upgraded in the later years, it results in deficiencies to exist in design or construction of the structure. In Kerala, there exist several old buildings which were designed for seismic zone II, whereas, at present Kerala belongs to seismic zone III. In this paper, a building that was designed for seismic zone II is selected. The analysis of the structure is carried out and the structure is redesigned for seismic zone III. The additional seismic resistance required for the structure is determined and retrofitting methods are proposed to achieve the required seismic strength

Keywords: retrofitting; design; CFRP

DOI: https://doi.org/10.15623/ijret.2015.0415012