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对5个1:1.67的缩尺木构架模型进行了低周反复荷载预损试验,随后对采用不同半径、不同厚度的弧形耗能器增强的预损木构架模型进行低周反复荷载试验,得到了增强前后木构架的破坏模式、荷载-位移滞回曲线、骨架曲线、耗能能力等性能参数;对弧形耗能器单独进行了低周反复荷载作用下的性能试验,得到了其滞回曲线和骨架曲线。试验结果表明:增强后木构架仍具有很好的变形能力;采用弧形耗能器能显著提高木构架的刚度、承载力和耗能能力,增强后木构架的承载力与刚度主要由弧形耗能器提供;木构架的刚度、承载力和耗能能力在一定范围内随着耗能器厚度的增加而增加;随着耗能器半径的增大,加载前期木构架刚度和承载力会有所下降,但加载后期耗能能力会有较大的提升。
Low-cycle repeated load pre-loss test was carried out on five 1: 1.67 scale wood frame models. Then the low-cycle repeated load test was carried out on the pre-damaged wood frame model reinforced with arc energy dissipators of different radii and thicknesses. The failure mode, the load-displacement hysteresis curve, the skeleton curve, the energy dissipation capacity and other performance parameters of the wood frame before and after reinforcement were obtained. The performance test of the arc-shaped energy dissipator alone under low cyclic loading was obtained. Back curve and skeleton curve. The test results show that the wood frame still has good deformation ability after being strengthened. The arc-shaped energy dissipation device can significantly increase the rigidity, bearing capacity and energy dissipation capacity of the wood frame. The bearing capacity and rigidity of the wood frame after reinforcement are mainly composed of an arc The rigidity, bearing capacity and energy dissipation capacity of wood frame increase with the increase of the thickness of energy dissipation device within a certain range. As the radius of energy dissipation device increases, the rigidity and bearing capacity of wood frame will increase Has declined, but the late loading capacity will have a greater increase.