DYNAMIC BEHAVIOUR OF LOW-RISE SINGLE LAYERD DOMES SUBJECTED TO EARTHQUAKE MOTIONS

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Abstract
The present paper studies the dynamic collapse characteristics of relatively low-rise latticed spherical domes subjected to horizontal earthquake motions. First, the equivalent and static seismic forces for static analysis are calculated by elastic linear time-domain analysis adopting two acceleration records of ELCENTRO-NS and TAFT-EW. Secondly, the elasto-plastic buckling loads of the domes under both the self-weight and the static seismic force are examined by elasto-plastic buckling analysis. These results reveal that the static buckling loads may be estimated with reasonable preciseness by combined use of generalized slenderness ratio and a linear buckling analysis. Lastly, the static buckling loads, statically estimated, are compared with the corresponding dynamic buckling loads, considering both geometrical and material nonlinearities.

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