Prediction of Nonlinear Behavior of Steel Coupling Beams under Seismic Loads Based on Experimental Results

Coupled shear wall with steel coupling beam is one of the hybrid structures that can provide an efficient structural system to resist horizontal force due to earthquake. On the other hand, recently much effort has been devoted to the development of dependable analytical tools for modeling component deterioration and prediction of global collapse of structural systems under seismic loading. Lack of data to model deterioration properties of structural components does not enable us to predict collapse in a reliable manner. This paper focuses on the proposal of relationships that associate deterioration model parameters with detailing, geometric and material properties that control deterioration of steel coupling beam. For calibration and validation of these models existing experimental results will be gathered from technical literatures. Based on information deduced from tests relationships for modelling of effective stiffness, yield strength, capping strength, cyclic deterioration, precapping and post-capping plastic rotation for steel coupling beams are proposed.