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Effects of structural walls on the elastic–plastic earthquake responses of frame–wall buildings
Author(s) -
Kongoli Xhafer,
Minami Tadao,
Sakai Yuki
Publication year - 1999
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/(sici)1096-9845(199905)28:5<479::aid-eqe826>3.0.co;2-h
Subject(s) - structural engineering , frame (networking) , shear wall , earthquake resistance , geology , earthquake engineering , geotechnical engineering , engineering , mechanical engineering
Effects of structural walls on the elastic–plastic earthquake response of short‐ to medium‐height reinforced concrete buildings were investigated. The analytical model consists of independent lumped mass systems representing walls and frames connected at each floor. The wall structure undergoes flexural as well as shear deformation and fails in shear at relatively small story drifts, the frames deforming only in shear. As a measure of structural damage, the ductility factor responses of frame structures were calculated for different combinations of base shear coefficients for the frames and walls. In buildings with relatively weak frames, the installation of structural walls did not improve the large plastic response of the frames up to the point where the walls were unfailed in shear and the ductility factors of the frame structure were suddenly reduced to a very small number. For relatively strong frames, however, the response displacements decreased gradually as the number of walls increased, whether or not the walls failed. Empirical formulas for the required base shear coefficients of the walls and frames which gave a target ductility factor response also were derived for two particular groups of accelerograms. These equations should be of practical use in designing frame‐wall type buildings and in retrofitting damaged buildings. Copyright © 1999 John Wiley & Sons, Ltd.