EFFECT OF MATERIAL PROPERTIES ON INELASTIC DYNAMIC-RESPONSE OF SPANDREL BEAMS

Based on equilibrium and compatibility conditions as well as a triline ar relationship for moment-curvature and torque-twist curves, a theory was presented to predict the static behaviour of reinforced concrete spandrel beams. The theory was compared to tests of 20 spandrel beams and was found to be applicable throughout the loading history. It is s hown in this paper that the inelastic dynamic response of spandrel bea ms can be predicted using Takeda's rules for hysteresis loops and the linear acceleration step-by-step method, and an algorithm is described for the solution of such beams. Moreover, the effect of material prop erties on the inelastic dynamic response of such beams is systematical ly studied. it is found that the ductility factors of such beams are i ncreased with increasing concrete compressive strengths; and the ducti lity demands are decreased with increasing concrete compressive streng ths.