WIT Press

Seismic Vulnerability Of Masonry Infilled Reinforced Concrete Frame Structures


Free (open access)

Paper DOI






Page Range

23 - 34




535 kb


A. Madan


Despite intense worldwide research in the area of masonry infilled frame structures during the past half a century, displacement-based non-linear analyses of masonry infilled frames with explicit consideration of infill panels as structural elements is far from common practice in earthquake resistant design of such structures. The displacements are of particular interest from the viewpoint of performance-based design (PBD), the emerging paradigm for the next generation of standard codes of practice for earthquake resistant design. The present paper is based on an analytical study of the seismic performance and vulnerability of typical planar masonry infilled reinforced concrete (R/C) frames considering the effect of distribution of masonry infill panels over the elevation of the R/C frame using rational displacement based analysis methods such as non-linear dynamic time-history analysis based on realistic and efficient hysteretic models of the structural elements. The results of the displacementbased analyses are used to develop seismic vulnerability curves in probabilistic terms for the populations of typical medium-rise masonry infilled reinforced concrete (R/C) framed buildings. The proposed seismic vulnerability curves are termed as fragility curves in the present study that provide useful tools for predicting life and economic losses in the event of a future earthquake. Keywords: seismic vulnerability, seismic demand, fragility analysis, performance based seismic design. 1 Introduction More than 90 percent of multi-story buildings in urban India and, in general, Asia are constructed as reinforced concrete (R/C) framed structures with


seismic vulnerability, seismic demand, fragility analysis, performance based seismic design