Open AccessMoment redistribution in continuous beams of earthquake resistant multistorey reinforced concrete frames
Author(s) -
T. Paulay
Publication year - 1976
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.9.4.205-212
Subject(s) - redistribution (election) , structural engineering , moment (physics) , reinforced concrete , statically indeterminate , earthquake resistance , excitation , computer science , engineering , physics , classical mechanics , electrical engineering , politics , political science , law
To allow a more uniform and efficient distribution of load resistance in reinforced concrete frames that may be subjected to seismic excitation well beyond the range of elastic response, the concepts of moment redistribution, well known from the plastic design of steel structures,
are re-examined. The aims of moment redistribution, with particular reference to earthquake loading, are stated and relevant terms are defined. To allow advantageous but statically admissible adjustments of moments, derived from an elastic analysis, to be made, the requirements of equilibrium and lateral load resistance are assembled into a set of simple rules. Certain limits for redistribution, which appear to be reasonable
in the light of existing provisions for structural ductility, and yet are not too restrictive, are proposed. A technique, involving simple graphic manipulations well suited for design office use, is suggested and with the aid of an example its application is shown in detail.