Design objectives and collapse prevention for building structures in mega-earthquake

Design objectives and collapse prevention for building structures in mega-earthquake - Printable Version

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Design objectives and collapse prevention for building structures in mega-earthquake - TAFATNEB - 04-26-2014

A “mega-earthquake” is one with an intensity larger than the most severe earthquake intensity category currently considered in design codes. For a “mega-earthquake,” the design objective of a given structure is to “preserve living spaces for people in the buildings.” In this paper, factors that may infl uence the collapse resistance of RC frames in a megaearthquake are analyzed based on seismic damage observed in the 2008 Wenchuan earthquake. Methodologies to improve structural collapse resistance focus on three aspects: global strength margin, global redundancy and global integration of the structural system. Fundamental principles and design concepts for collapse prevention under a mega-earthquake are proposed, and issues that need further research are identifi ed.

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