Premium
The effect of coulomb damping on multidegree of freedom elastic structures
Author(s) -
Mayes R. L.,
Mowbray N. A.
Publication year - 1974
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.4290030306
Subject(s) - coulomb , viscous damping , vibration , damping torque , physics , magnetic damping , damper , mechanics , series (stratigraphy) , classical mechanics , thermoelastic damping , structural engineering , engineering , voltage , acoustics , geology , paleontology , direct torque control , quantum mechanics , induction motor , electron , thermal , meteorology
This paper is based on the premise that the damping mechanism of a multidegree of freedom structure can be represented by viscous and coulomb dampers. A closed form solution for the structure subjected to a sinusoidal forcing function is presented. The solution is used as the basis of a method for determining relative amounts of viscous and coulomb damping from vibration tests. The method was applied to the results of a series of vibration tests on a five storey reinforced concrete structure and approximate values of viscous and coulomb damping obtained. A comparison of the effect of various combined damping values on the earthquake response of the structure was made. It was concluded that the use of the equivalent viscous damping concept to approximate the combined effect of viscous and coulomb damping results in a low estimate of the elastic response of the structure.