Design objectives and collapse prevention for building structures in mega-earthquake |
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Authors: | Lieping Ye Xinzheng Lu Yi Li |
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Institution: | Ye Lieping1,2,Lu Xinzheng1,2 and Li Yi1,2 1.Department of Civil Engineering,Tsinghua University,Beijing 100084,China 2.Key Laboratory of Civil Engineering Safety and Durability,Ministry of Education of China,China |
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Abstract: | 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 influence 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 identified. |
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Keywords: | Wenchuan earthquake mega-earthquake RC frame collapse strength margin |
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