Research and development of seismic retrofitting method by installing dampers between buildings as energy absorption

研究了在既有建筑与其它建筑之间设置滞回阻尼器和粘滞阻尼器的既有建筑抗震加固方法。首先，通过单调加载和循环加载试验以及有限元分析，对滞回阻尼器和粘滞阻尼器的性能进行了研究。然后通过多种数值模拟方法，探讨了在役建筑结构的减震效果。对于采用滞回阻尼器进行结构加固的方法，通过对连体结构体系进行子结构拟动力试验，验证了其有效性。最后，提出了用阻尼器连接建筑物的加固方法，并针对低屈服强度钢剪切型阻尼器，通过数值模拟，讨论了阻尼器薄腹板离板变形对连接建筑物受力性能的影响。结果表明，骨架移位模型具有良好的适用性。那么两个人的行为 ...更多信息 摘要探讨了采用低屈服强度钢管的组合阻尼器，并对钢管阻尼器连接结构的性能进行了分析。分析了裂纹对钢管阻尼器性能的影响，提出了采用双位移模型进行分析的可能性。摩擦阻尼器采用双线性理想弹塑性本构模型来近似其特性，摩擦阻尼器可显著减小连体结构的反应位移。提出了滞回阻尼器减震效果的性能曲线，对于液压阻尼器的应用，采用速度与阻尼力的线性关系来模拟阻尼器的特性，并讨论了连接结构的减震效果。当扩建建筑物与旧建筑物的重量比大于25%时，对1000 kN的旧建筑物重量，需要5-20 kNs/cm的阻尼系数。通过0 ℃、20 ℃、40 ℃三种温度下的高速加载试验，采用多重麦克斯韦模型对粘弹性阻尼器的特性进行了分析。结果表明，当扩建房屋与旧房屋的重量比大于25%时，应对1000 kN的旧房屋重量，需要8.5 kNs/cm的阻尼系数。少

Authors worked on seismic retrofit method of existing building by installing hysteretic dampers and viscous dampers between existing building and the other buildings. At first, the characteristics of hysteretic and viscous dampers were xamined by monotonic and cyclic loading tests and FEM analysis. Then the effectiveness of reducing response displacements and accelerations of the existing building were discussed through many kinds of numerical simulations. As for retrofitting by using hysteretic dampers, the effectiveness was verified by conducting sub-structuring pseudo-dynamic tests on linked structure system. Finally, a retrofit method by connecting buildings by dampers was proposed.As for low yield strength steel shear damper, the behavior of connected buildings affected by off-plate deformation of thin web panel of the damper, was discussed by simulation by skeleton-shift-model. It has become clear that the skeleton shift model had good applicability. Then the behavior of two-dire … More ctional damper by using low yield strength steel tube was discussed, and the behavior of structures connected by the steel tube damper was discussed. The performance of the steel tube damper is affected by the cracks, and the possibility of application of analysis by skeleton-shift-model was proposed. As for friction damper, the characteristics were approximated by bi-linear perfect elasto-plastic model, and the response displacements of connected buildings by friction dampers were reduced dramatically. The performance curve meaning response reduction effectiveness by using hysteretic dampers were proposed.As for the application of hydraulic damper, the characteristics of the damper was modeled by linear relationship between velocity and damper force, and the response reduction effectiveness of connected buildings was discussed. When the weight ratio of extensional building to old building is more than 25 %, the 5-20 kNs/cm damping coefficient is needed against 1000 kN weight of the old building. Then the characteristics of visco-elastic damper were discussed by high-velocity loading test under the temperature of 0, 20, 40 degree, and approximated by multiple Maxwell model. The results showed that the 8.5 kNs/cm damping coefficient is needed against 1000 kN weight of the old building, when the weight ratio of extensional building to old building is more than 25 %. Less