Constraining Paleoseismic PGA Using Numerical Analysis of Structural Failures in Historic Masonry structures

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Abstract

A novel approach to assess historic ground motions from back analysis of struc-tural failures in historic masonry structures is presented using a fully dynamic, numerical, discrete element approach, the Discontinuous Deformation Analysis method (DDA). Two types of masonry structures exhibiting two different failure modes are analyzed: 1) dynamic key stone displacements in a masonry arche at the Roman Mamshit site, and 2) dynamic rock-ing and collapse of columns supporting the roof of a Byzantine church at the Susita site. The response of the structures is studied numerically up to a point of incipient failure in a mecha-nism similar to the one observed in the field, and paleoseismic PGA values are thus con-strained. The modeled structural response is found to be very sensitive to the input parameters of the dynamic loading function, predominantly amplitude and frequency.
Original languageEnglish
Pages (from-to)84-87
Number of pages3
JournalISRM News Journal
Volume12
StatePublished - 2009

Keywords

  • a novel approach to
  • abstract
  • assess historic ground motions
  • dynamics
  • earthquake engineering
  • from back analysis of
  • masonry structures
  • masonry structures is presented
  • numerical
  • old monuments
  • paleo-pga
  • seismic hazard
  • struc-
  • structural
  • tural failures in historic
  • using a fully dynamic

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