Analysis of Infilled Wall Frame for Evaluation of Multiplication Factor

Abstract

Masonry infilled reinforced concrete (RC) frames are the most common type of structures which is used for multi-storeyed constructions in the developing countries like India, even those theseare located in seismically active regions. Masonry infill walls are frequently used as interior and exterior wall in reinforced concrete (RC)buildings. Infill wall protects the internal of the buildings from the environment hazards. Masonry infills are normally considered as non-structural elements and their stiffness contributions are generally ignored in practice, such approach can lead to an unsafe design. This paper includes seismic analysis of multi-storey structure with and without infill wall by using response spectrum and time history analysis method. Both the structure analysed and compared in different terms such as base shear, maximum storey drift and multiplication factor of soft storey column using finite element method (FEM) based software SAP2000. The result shows that presence of infill wall increases the stiffness and strength of structure. IS code 1893(Part I):2002 provision does not satisfy the multiplication factor of soft storey column.

Keywords: Bare frame, equivalent diagonal strut, infill wall, response spectrum, time history