Analogue computer techniques in a seismic design

  1. (PDF, 647 KB)
AuthorSearch for:
Pages669679; # of pages: 11
AbstractAseismic design is handicapped by a lack of statistical knowledge of earthquakes and the difficulty of analyzing the response of a complex frame to these irregular forcing functions. Structures subject to earthquake motion present a complex picture of linear and non-linear vibration. An explicit solution in terms of the participation factors of the modes and spectrum of the earthquake is useful when considering linear vibrations of the structure but the introduction of non-linearities such as friction and plastic yielding make this approach untenable. The general complexity of both linear and non-linear cases has led to the simulation of structures by various mechanical and electrical models. These models are highlyidealized and, in general, simulate only the major motions of the structure such as shearing, bending, and rocking of the structure on its base. Mechanical modellhg produces satisfactory results but suffers from complexity and lack of versatility. Further, it is difficult to apply to a mechanical model, which is necessarily not small, a prescribed forcing function as complicated as that of an earthquake. On the other hand thismethod has the advantage that the structure may be more faithfully modelled than by other means. Electrical models of various types have been made and have the advantage that their parameters may be readilychanged over large ranges and measurements recorded by convenient instruments.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number6359
NPARC number20358937
Export citationExport as RIS
Report a correctionReport a correction
Record identifierf0ca49e2-bc70-4adc-a30e-66a5cdd0d358
Record created2012-07-20
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: