Fragility Analysis – A Tool to Assess Seismic Performance of Structural Systems

• Published in: Materials today : proceedings Vol. 4; no. 9; pp. 10565 - 10569
• Main Authors: A, Gautham, Gopi Krishna, K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2017
• Subjects: Fragility Analysis; Progressive collapse; Push-over analysis; Reliability methods; Progressive collapse; Fragility Analysis; Push-over analysis; Reliability methods
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2017.06.421

In the last few decades, there has been a growing trend to utilise reliability based methods of seismic evaluation for assessing the vulnerability of structures subject to ground motion vibrations. The traditional deterministic approach for seismic assessment of structures was found to be inadequate owing to the uncertainties and randomness commonly encountered under the effect of an earthquake [3]. With the advent of digital technology, accuracy of seismic analysis increased which paved way for probabilistic approaches which offer a more realistic and rational approach. Fragility analysis is one such approach which correlates demand and capacity to establish the probabilistic characterization of the demands with respect to certain limit states. Hence the present work is primarily focussed on presenting the potential of fragility curves in performance assessment of structural systems. Building structures of various configurations and irregularities introduced to achieve certain functional benefits are also considered in this study. Nonlinear static analysis is carried out using Capacity Spectrum method on the structural models using SAP2000 and the results discussed in section 5 clearly demonstrate the beneficial aspects of the fragility tool.