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Seismic hazard and response spectrum modelling for Malaysia and Singapore

  • Looi, Daniel T.W. ;
  • Tsang, H.H. ;
  • Hee, M.C. ;
  • Lam, Nelson T.K.
  • Received : 2017.11.23
  • Accepted : 2018.03.04
  • Published : 2018.07.25

Abstract

Malaysia and Singapore have adopted Eurocode 8 (EC8) for the seismic design of building structures. The authors studied the seismic hazard modelling of the region surrounding Malaysia and Singapore for a long time and have been key contributors to the drafting of the Malaysia National Annex (NA). The purpose of this paper is to explain the principles underlying the derivation of the elastic response spectrum model for Malaysia (Peninsular Malaysia, Sarawak and Sabah). The current EC8 NA for Singapore is primarily intended to address the distant hazards from Sumatra and is not intended to provide coverage for potential local intraplate hazards. Hence, this paper recommends a reconciled elastic response spectrum for Singapore, aiming to achieve a more robust level of safety. The topics covered include the modelling of distant interplate earthquakes generated offshore and local earthquakes in an intraplate tectonic setting, decisions on zoning, modelling of earthquake recurrences, ground motion and response spectrum. Alternative expression for response spectrum on rock, strictly based on the rigid framework of EC8 is discussed.

Keywords

Eurocode 8;seismic hazard;response spectrum;PSHA;intraplate local earthquake

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