【摘要】 为验证剪切型阻尼器对穿斗式木结构建筑的增强加固效果，将16个扇形剪切型阻尼器安装在穿斗式木结构四角柱榫卯节点处，分别对原结构(无控结构)模型和安装有阻尼器的结构(有控结构)模型进行峰值加速度由0.14g逐步增大至0.95g(9度多遇～9度极罕遇)的地震波激励振动台试验。对试验模型动力特性和地震响应对比分析结果表明：有控结构模型始终保持弹性状态，结构模型X向自振频率仅在输入峰值加速度0.95g地震波激励后出现下降，由1.907 Hz降为1.587 Hz,Y向自振频率始终保持3.052 Hz;Y向阻尼器发挥作用更为明显，对刚度较小部位以提供附加刚度为主，对刚度较大部位以提供附加阻尼为主，有控结构模型最小动力放大系数大于无控结构模型的，其最大动力放大系数均小于无控结构模型的；最大层间位移角均发生在Kobe波激励下结构二层层间，有控结构模型最大层间位移角大部分小于无控结构模型的；扇形剪切型阻尼器作为9度高抗震设防烈度区穿斗式木结构建筑增强加固措施是适宜的。更多还原

【Abstract】 In order to investigate the strengthening effect of the shear type damper to Chuandou-type timber structure building, a shaking table test on a Chuandou-type timber structure installing 16 sector-shaped shear type dampers was carried out. The structure without and with additional dampers were subjected to three ground motions whose peak ground accelerations(PGAs) were varied from 0.14g to 0.95g,corresponding to 9 degree frequent earthquakes to 9 degree extremely rare earthquakes. The dynamic properties and structural responses of the two structures were compared. The experimental results indicate that the structural models remain in an elastic state, and the natural vibration frequency of the controlled structure model decrease from 1.907 Hz to 1.587 Hz in the X-direction only after the excitation intensity exceeding 0.95g, while it remains unchanged at 3.052 Hz in the Y-direction. The dampers play a more obvious role in the Y-direction. It mainly provides additional stiffness for the parts with lower stiffness and adds damping to the parts with higher stiffness. The minimum dynamic amplification coefficient of the controlled structure model is greater than that of the uncontrolled structure model, while the maximum dynamic amplification coefficient of the controlled structure model is smaller than that of the uncontrolled structure model. The maximum inter-story drift ratio occurs in the second layer of the structure under the excitation of Kobe wave, and the maximum inter-story drift ratios of the controlled structure model are smaller than those of the uncontrolled structure model mostly. The sector-shaped shear type damper is suitable as a reinforcement measure for the Chuandou-type timber structure buildings located in the 9 degree high intensity zone.更多还原