Similitude Distortion Compensation for a Small Scale Model of a Knee Braced Steel Frame
Nouredine Bourahla and Anthony Blakeborough
DOI : 10.3844/ajeassp.2015.481.488
American Journal of Engineering and Applied Sciences
Volume 8, Issue 4
The purpose of producing scaled physical models is to allow the assessment in the laboratory of the probable response of a structure to a prescribed loading. It is obviously of paramount importance to construct these models to reflect reality as accurately as possible. The problem encountered particularly for dynamic testing is that the similitude requirements are sometimes impractical. This paper presents the design details of 1:12 scale model of a ten storey Knee Braced Frame (KBF) for testing on a shaking table. The implications of imperfect similitude are investigated and a mass adjustment technique is used to compensate for the modeling distortion. The method used is successful in correcting the unsatisfied similitude conditions. The dynamic properties as well as the response parameters of primary interest, i.e., horizontal floor displacements, knee element ductility and the energy dissipation capacity of the small scale model are then within the range of true scale buildings.
© 2015 Nouredine Bourahla and Anthony Blakeborough. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.