Authors

Soumi Rajbanshi Diptesh Das

 

Abstract

A passive shape-memory-alloy–rubber-bearing isolator has been developed for seismic protection of offshore jacket platforms.

Mathematical modelling of an offshore jacket platform subjected to earthquake ground motions was undertaken, after which a systematic study of the key parameters of the isolator was undertaken to investigate its efficiency and to improve its performance. Dynamic time history analyses were carried out for both isolated and non-isolated jacket platforms using scaled ground motions.

These clearly indicated the effectiveness of the isolator in controlling the overall responses of the jacket platform. It was better at mitigating structural displacement than structural acceleration, and its performance was dependent on the duration of ground motion.

 

Keywords

mathematical modelling offshore engineering seismic engineering

 

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