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Modal damping for torsionally coupled buildings on elastic foundation
Author(s) -
Balendra Thambirajah,
Tat Chan Weng,
Lee SengLip
Publication year - 1982
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/eqe.4290100510
Subject(s) - modal , normal mode , modal testing , foundation (evidence) , structural engineering , damping ratio , mode (computer interface) , modal analysis using fem , physics , modal analysis , mathematical analysis , mathematics , acoustics , engineering , vibration , computer science , materials science , archaeology , polymer chemistry , history , operating system
A method to determine the approximate normal modes and the modal damping for torsionally coupled buildings on an elastic foundation is presented. The modal damping is determined by an iterative procedure which matches the approximate normal mode solution with the rigorous solution. The response quantity to be matched is selected in a consistent and logical manner. The normal modes and the damping ratios thus found are then used to determine the seismic response of the interaction system by the response spectrum technique.