Earthquakes and Structures

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Multiple characteristic response damage analysis of large-span space structures based on equivalent damping ratio

  • Wei, Jun (Department of Civil Engineering, Qinghai University) ;
  • Yang, Qingshun (Department of Civil Engineering, Qinghai University) ;
  • Zhou, Lexiang (Department of Civil Engineering, Qinghai University) ;
  • Chen, Fei (Department of Civil Engineering, Qinghai University)
  • Received : 2021.08.01
  • Accepted : 2022.10.17
  • Published : 2022.10.25
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Abstract

Due to the large volume and generally as a public building, the damage of large-span space structures under various non-conventional loads will cause greater economic losses, casualties, and social impacts, etc. Therefore, it is particularly important to evaluate the seismic performance of large-span space structures. This paper taked a multipurpose sports center as an example and considered its synergistic deformation based on the method of equivalent damping ratio. Furthermore, The ABAQUS software was used to analyze the time-history and energy response of the multipurpose sports center under the action of rare earthquakes, and proposed a quantitative damage index to assess the overall damage of the structure. Finally, the research results indicated that the maximum inter-story drift ratio of the multipurpose sports center under the action of rare earthquakes was less than its limit value. The frame beams presented different degrees of damage, but the key members were basically in an elastic state. The bearing capacity did not reach the limit value, which satisfied the intended seismic performance target. This study taked an actual case as an example and proposed a relevant damage evaluation system, which provided some reference for the analysis of the seismic performance of large-span space structures.

Keywords

Acknowledgement

This research was supported by the Qinghai Provincial Science and Technology Program Project Fund (2019-ZJ-975Q).

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