NON-LINEAR ELASTIC HYSTERESIS RULE AND DOF REDUCED MODEL OF NON-COMPRESSION BRACED FRAMES

NC braced frames proposed by the authors are a new structural system that can be reduced seismic responses based on an elastic strain energy accumulation. Although the energy accumulation yields a non-linear elastic hysteresis, this hysteresis rule has not been formulated. This report first describes a non-linear elastic behavior of single-story NC braced frames, and then presents a 1DOF reduced model incorporating the hysteresis rules. Time history analyses of the 1DOF and frame models were carried out to verify the response reproducibility. As a result of the comparison, the 1DOF model reproduced the responses of the frame model.