Experimental Study on the Reinforced Chuan-Dou-style Wooden Structure of the New Viscoelastic Damper
To study the seismic performance of self-developed new viscoelastic dampers for reinforcing traditional tim-ber structures in rural villages,two full-scale Chuan-Dou-style wooden frames were made as models based on the Yunnan"One Seal".One frame was a longitudinal timber frame,and the other was a transverse timber frame.Cyclic loading tests were conducted on the timber frames.The hysteretic behavior,skeleton curves,stiffness degradation,en-ergy dissipation capacity,and dovetail slippage of the model structures were compared and analyzed.The results showed that the hysteresis curves of the unreinforced specimens exhibited obvious reverse"Z"shapes,while the hyster-esis curves of the reinforced specimens were fuller.The new viscoelastic dampers compensated for the defects of the orig-inal structures and increased the initial stiffness.Compared to the unreinforced,the maximum slippage of the reinforced longitudinal frame decreased by 68.5%,and that of the transverse frame decreased by 81.25%.The new viscoelastic dampers can inhibit mortise and tenon nodes connection failure,enhance the lateral stiffness and energy dissipation ca-pacity of the timber frames.
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