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An alternative modal combination rule for adaptive pushover analysis
Author(s) -
Tajik Davoudi Alireza,
Abbasnia Reza,
SarvghadMoghadam Abdolreza,
Maddah MohammadMahdi,
Khodam Ali
Publication year - 2016
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.1260
Subject(s) - modal , benchmark (surveying) , displacement (psychology) , mode (computer interface) , nonlinear system , computer science , modal analysis , sign (mathematics) , structural engineering , engineering , mathematics , finite element method , geology , psychology , mathematical analysis , chemistry , physics , geodesy , quantum mechanics , polymer chemistry , psychotherapist , operating system
Summary The main purpose of the present study is to develop an alternative modal combination rule for use in the adaptive pushover analysis. Since the quadratic modal combination rules do not take into account the sign reversals of the modal load vectors in the higher modes, the accuracy of the advanced pushover methods are decreased. The proposed modal combination rule is a direct vectorial addition technique in which the relative contribution of each mode and its sign are taken into account. The proposed modal combination rule is employed within the displacement‐based adaptive pushover technique, and an alternative pushover procedure is developed. In order to verify the accuracy of the proposed method, two reference buildings are used, and the obtained results from the proposed method and nonlinear time history analysis are compared. It is concluded that the proposed method can estimate the benchmark responses with remarkable accuracy. Copyright © 2016 John Wiley & Sons, Ltd.