Adaptive conceptual framework for seismic vulnerability assessment of reinforced concrete buildings in pakistan

Abstract eng:
The devastating Kashmir earthquake of October 2005 identified many shortfalls in the construction practices not only in the rural areas but also the growing urban areas of Pakistan. Seismic activities within and around geographical bounds of Pakistan are now being considered as a potential threat to already existing stock of buildings. In the wake of this awareness, it is the most appropriate time to develop adaptive vulnerability models and suggestive retrofit measures. This paper, therefore, highlights the undertaking in this respect. The paper briefly reviews and discusses the seismic assessment procedure in vogue in various parts of the world and their application according to the local building conditions and seismic hazards, and proposes an Adaptive Conceptual Framework for Vulnerability Assessment of Reinforced Concrete Buildings for the urban stocks of Pakistan. This framework is based on a three tier procedure in which the first level of assessment comprises of Rapid Visual Screening of a building, resulting into categorization of building into four categories and scored according to its seismic vulnerability. The second level of assessment comprises of detailed engineering assessment in which the vulnerability parameters identified from the previous level are further investigated quantitatively, leading to third level of assessment comprising of pushover analysis resulting in identifying the level of needed retrofit and/or techniques for strengthening the assessed structure.

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