Abstract
This study presents a seismic fragility analysis and ultimate spectral displacement assessment of regular low-rise masonry infilled (MI) reinforced concrete (RC) buildings using a coefficient-based method. The coefficient-based method does not require a complicated finite element analysis; instead, it is a simplified procedure for assessing the spectral acceleration and displacement of buildings subjected to earthquakes. A regression analysis was first performed to obtain the best-fitting equations for the inter-story drift ratio (IDR) and period shift factor of low-rise MI RC buildings in response to the peak ground acceleration of earthquakes using published results obtained from shaking table tests. Both spectral acceleration- and spectral displacement-based fragility curves under various damage states (in terms of IDR) were then constructed using the coefficient-based method. Finally, the spectral displacements of low-rise MI RC buildings at the ultimate (or nearcollapse) state obtained from this paper and the literature were compared. The simulation results indicate that the fragility curves obtained from this study and other previous work correspond well. Furthermore, most of the spectral displacements of low-rise MI RC buildings at the ultimate state from the literature fall within the bounded spectral displacements predicted by the coefficient-based method.
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Supported by: the Research Grants Council of the Hong Kong SAR under Project No. HKU7166/08E and the Sichuan Earthquake Roundtable Fund of the University of Hong Kong
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Su, R.K.L., Lee, CL. Development of seismic fragility curves for low-rise masonry infilled reinforced concrete buildings by a coefficient-based method. Earthq. Eng. Eng. Vib. 12, 319–332 (2013). https://doi.org/10.1007/s11803-013-0174-0
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DOI: https://doi.org/10.1007/s11803-013-0174-0