Near-fault ground motions: Demand and structural capacity requirements

Gulkan P., Akkar D.

Seminar on Fundamentals of Seismic Design, WARRINGTON, ENGLAND, 27 November 2001, pp.139-172 identifier

  • Publication Type: Conference Paper / Full Text
  • Country: ENGLAND
  • Page Numbers: pp.139-172
  • Middle East Technical University Affiliated: Yes


The improvement of structural capacity against large displacement demand of near-fault ground motions has been the subject of research for the last decade. Parallel to the developments in performance-based seismic design (PBSD) this issue has attracted researcher interest further, as assessment of structural displacement capacity has become one of the main concerns for the procedures employed in this new design concept. This Chapter focuses on the near-fault ground motion demand and corresponding structural capacity requirements. We have used soil site, near-fault records from various M > 6.5 events including the 1999 Turkey and Taiwan earthquakes. The spectral quantities were computed through an attenuation relationship that is based on these near-fault ground motion records. We employ these spectral quantities to calculate the distance and magnitude dependent inter-story drift demand limits for frame-type structures. We compare our findings with the Uniform Building Code provisions and other attenuation relationships used in defining the NEHRP spectrum shapes.