Simulation of subsea seismic ground motions

H. Hao, K. Bi, C. Li, H. Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Seismic motions at seafloor are different from those at onshore sites since seawater can significantly suppress the seafloor vertical motions at the P-wave resonant frequencies of the seawater layer. Seawater layer also indirectly influences the seafloor motions as it changes the water saturation level and pore pressure of subsea soil layers. This paper summarizes some recent developments on the study of characteristics of subsea ground motions, and simulations of seismic motions at seafloor for use in seismic response analysis of offshore structures. The theoretical seafloor transfer functions are presented first. Procedures of simulating seafloor motions from the base rock motion spectrum or using onshore earthquake recordings are introduced. A numerical example is provided following the corresponding theoretical background in each section to demonstrate the procedure. The procedures can be used to simulate seafloor motions that can be used as inputs in the seismic response analysis of offshore structures.

Original languageEnglish
Title of host publicationSeismic Performance of Soil-Foundation-Structure Systems - Selected papers from the International Workshop on Seismic Performance of Soil-foundation-structure systems, 2016
EditorsNawawi Chouw, Rolando P. Orense, Tam Larkin
PublisherCRC Press/Balkema
Pages1-12
Number of pages12
ISBN (Print)9781138062511
DOIs
Publication statusPublished - 2017
Externally publishedYes
EventInternational Workshop on Seismic Performance of Soil-foundation-structure systems, 2016 - Auckland, New Zealand
Duration: 21 Nov 201622 Nov 2016

Publication series

NameSeismic Performance of Soil-Foundation-Structure Systems - Selected papers from the International Workshop on Seismic Performance of Soil-foundation-structure systems, 2016

Conference

ConferenceInternational Workshop on Seismic Performance of Soil-foundation-structure systems, 2016
Country/TerritoryNew Zealand
CityAuckland
Period21/11/1622/11/16

ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

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