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TIME HISTORY ANALYSIS OF SEISMICALLY ISOLATED FIXED BASE OFFSHORE PLATFORM

Azam Khan*, Irshad Ahmad**

 * Offshore Structural Engineer, SNC Lavalin Limited.

** Department of Civil Engineering, University of Engineering & Technology, Peshawar, Pakistan.

ABSTRACT

This paper presents an overview of the application of seismic isolation to a fixed-base offshore platform. A series of nonlinear time history analyses has been undertaken for the Platform A to assess structural integrity under Ductility Level Earthquake (DLE) design events. A full nonlinear time history analysis (including soil and foundation modelling) has been undertaken using finite element software SAFJAC for an extreme earthquake records scaled for the DLE event.

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Journal of Engineering and Applied Sciences

December

Vol. 42, pp. 01-48

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