Open AccessA consideration of the torsional response of building frames
Author(s) -
Avigdor Rutenberg
Publication year - 1979
Publication title -
bulletin of the new zealand society for earthquake engineering/nzsee quarterly bulletin
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.917
H-Index - 36
eISSN - 2324-1543
pISSN - 1174-9857
DOI - 10.5459/bnzsee.12.1.11-21
Subject(s) - modal , interpretation (philosophy) , modal analysis , degrees of freedom (physics and chemistry) , structural engineering , spectral analysis , computer science , engineering , finite element method , physics , materials science , programming language , composite material , quantum mechanics , spectroscopy
History of elastic static procedures for the seismic analysis of torsionally unbalanced building structures is briefly reviewed. It is suggested that the provisions of NZS 4203:1976, accounting for modal coupling, are based on inconsistent interpretation of results from well known two-degrees-of-freedom models. An alternative dynamic procedure
is described which, while retaining the basic two-dimensional features
of NZS 4203:1976 torsional provisions, is equivalent to three-dimensional modal spectral analysis. The procedure also results in a substantial simplification of the analysis compared with standard dynamic computer techniques now available to the structural engineer.