Seismic Vulnerability of Masonry Infilled Reinforced Concrete Frame Structures

Seismic Vulnerability of Masonry Infilled Reinforced Concrete Frame Structures

Alok Madan 

Department of Civil Engineering, Indian Institute of Technology, Delhi, India

30 September 2013
| Citation



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 consider-ation 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 perfor-mance 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 real-istic and efficient hysteretic models of the structural elements. The results of the displacement-based analyses are used to develop seismic vulnerability curves in probabilistic terms for the populations of typical medium-rise masonry infilled 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 eco-nomic losses in the event of a future earthquake.


Fragility analysis, performance-based seismic design, seismic demand, seismic vulnerability


[1] Bilham, R., Gaur, V.K. & Molnar, P., Himalayan seismic hazard. Science, 293(5534), pp. 1442–1444, 2001. doi:

[2] Rossetto T. & Elnashai A., Derivation of vulnerability function for European- type RC structures based on observational data. Engineering Structures, 25(10), pp. 1241–1263, 2003. doi:

[3] Kwon, O.S. & Elnashai A., The effect of material and ground motion uncertainty on the seismic vulnerability curves of RC structures. Engineering Structures, 28(2), pp. 289–303, 2006. doi:

[4] Mosalam, K.M., Ayala, G., White, R.N. & Roth, C., Seismic fragility of LRC frames with and without masonry infill walls. Journal of Earthquake Engineering, 1, pp. 693–720, 1997. doi:

[5] Dumova-Jovanoska, E., Fragility curves for reinforced concrete structures in Skopje (Macedonia) Region. Soil Dynamics and Earthquake Engineering, 19, pp. 455–466, 2000. doi:

[6] Valles, R.E., Reinhorn, A.M., Kunnath, S.K., Li, C. & Madan, A., IDARC Version 4.0 - A Program for the Inelastic Damage Analysis of Buildings, Technical Report NCEER-96-0010, National Center for Earthquake Engineering Research: SUNY/ Buffalo, 1996.

[7] Rossetto, T. & Elnashai, A., A new analytical procedure for the derivation of displacement based vulnerability curves for population of RC structures. Engineering Structures, 27(3), pp. 397–409, 2005. doi:

[8] Kircil, M.S. & Polat, Z., Fragility analysis of Mid-Rise RC frame buildings. Engineering Structures, 28, pp. 1335–1345, 2006. doi:

[9] Madan, A. & Hashmi, A.K., Analytical prediction of seismic performance of masonry infilled reinforced concrete frames subjected to near-field earthquakes. Journal of Struc-tural Engineering ASCE, 134(9), pp. 1569–1581, 2008. doi: (ASCE)0733-9445(2008)134:9(1569)

[10] BIS. IS 1893-2002 (Part 1): Indian Standard Criteria for Earthquake Resistant Design of Structures, Part 1-General Provisions and Buildings, Bureau of Indian Standards: New Delhi, India, 2002.

[11] ICC IBC. 2000 International Building Code, International Code Council: Washington, DC, 2000.

[12] Madan, A., Reinhorn, A.M., Mander, J.B. & Valles, R., Modeling of masonry infill panels for structural analysis. Journal of Structural Engineering, 123, pp. 1295–1302, 1997. doi:

[13] ATC-40. Seismic Evaluation and Retrofit of Concrete Buildings. Report SSC 96-01, California Seismic Safety Commission, Applied Technology Council: Redwood, CA, 1996.

[14] FEMA-356. Prestandard and Commentary for Seismic Rehabilitation of Buildings, Federal Emergency Management Agency (FEMA): Washington D. C., USA, 2000.

[15] Wen, Y.K., Ellingwood, B.R. & Bracci, J., Vulnerability Function Framework for Consequence-Based Engineering, Mid-America Earthquake Center Project Report, University of Illinois at Urbana-Champaign: Urbana, 2004.