Abstract
As a major form of large span space structures, grid structures have developed fast in the last few years for their excellent shape and mechanical behavior. They are widely used in several types of structures, such as large stadiums, exhibition halls, waiting halls and so on. It will cause terrible casualties and substantial losses once these structures collapse under severe earthquakes, especially in the countries located in the seismic zone. However, the collapse mode of grid structures under strong earthquakes is not well understood. In this paper, the collapse process of an orthogonal square pyramid space grid under a one- or three-dimensional strong earthquake was simulated by large-scale general Finite Element software ABAQUS. Based on the analysis results, the general rules are obtained, which can provide reference for an earthquake-resistant design of grid structures.
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