%0 Journal Article
%T Experimental assessment of damping factors in concrete housing walls
%A Carrillo
%A J
%A Alcocer
%A S. M
%A Gonzalez
%A G
%J Ingenier¨ªa e Investigaci¨®n
%D 2012
%I Universidad Nacional de Colombia
%X thin walls having low concrete strength, minimum web steel ratios and web shear reinforcement made of welded wire meshes are commonly used in low-rise concrete housing. the damping factor commonly used for code-based dynamic analysis was evaluated based on seismic response measured during shake table tests of six low-rise concrete walls. the variables studied were the type of concrete (normal and lightweight), the web steel shear ratio (0.125% and 0.25%), the type of web shear reinforcement (deformed bars and welded wire meshes) and the effect of openings (doors and windows). dynamic properties were evaluated considering the advantages of frequency-domain system identification, using the dynamic transfer function amplitude fitting method. the effect of failure mode on damping factor is discussed. an equation for estimating damping associated with a particular vibration period value is also proposed. it was observed that a 5% damping factor (assumed for dynamic analysis of concrete housing in the range of lineal elastic behaviour) was consistent with the values measured here.
%K concrete wall
%K vibration period
%K damping factor
%K dynamic transfer function
%K shake table test.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-56092012000300009&lng=en&nrm=iso&tlng=en