Mahdi Adibi
University of Bojnord, Iran
Title: A novel nonlinear modeling technique for Beam-Column Joints Reinforced by Plain Bars
Biography
Biography: Mahdi Adibi
Abstract
Vulnerability of concrete beam-column joints reinforced by plain bars is one of the most usual damage modes during earthquakes between a large number of old buildings before the mid-1970s, that caused by either diagonal shear cracks or intersectional cracks. Diagonal cracks at the panel zone of the joint caused by shear resistance of the joint and intersectional crack caused by bar slippage.
In this study, a relatively simple and efficient nonlinear model is proposed to simulate pre- and post-elastic behavior of the joints which fail under bar slippage mode. In this model, beam and column components are represented by linear elastic elements, dimensions of the joint panel are defined by rigid elements, and effect of slip is taken into account by a nonlinear rotational spring at the end of beam. The proposed method is validated by experimental results for both internal and external joints