Restoring force model of an energy-dissipation joint and non-linear dynamic analysis of a hybrid frame

This paper presents the non-linear time-history analysis of an engineered bamboo and steel hybrid frame connected with novel energy-dissipation joints, of which the effectiveness has been proven by nine pseudo-static experiments in the previous study. The restoring force model of the joint with best performance is proposed, where the critical points of the simplified skeleton curve and the simplified hysteretic rules are obtained via So. Ph.I v. The effectiveness of the established restoring force model was verified by comparing with the experimental results, and good agreement was achieved. To further demonstrate the seismic performance of the energy-dissipation joint, the time-history analysis of a five-story three-span steel-engineered bamboo frame was simulated in Open-Sees with natural earthquake wave input. A zero length element at the ends of the beam was used to simulated the additional rotation of the semi-rigid joint. The pinching 4 material was used to define the moment-rotation relationship of the energy-dissipation joint, with the parameters optimized in So.Ph.I v. Drift of the hybrid frame was compared to standard limits, which can verify the effectiveness of both the energy-dissipation joint and the proposed restoring force model.