位移放大型阻尼墙减震结构的模型试验与数值分析

提出一种凸轮式响应放大金属阻尼器，介绍其工作机理和恢复力计算公式，对安装该阻尼器的单自由度体系建立了运动方程和能量方程。以达到相同位移控制效果为目标，采用不同吨位的金属阻尼器，分别对无控结构、安装传统金属阻尼器和安装凸轮式响应放大金属阻尼器的单自由度体系进行了多遇、罕遇和极罕遇地震作用下的地震响应对比分析。结果表明：在各级地震作用下，串联小吨位金属阻尼器的凸轮式响应放大金属阻尼器均达到了与安装传统大吨位金属阻尼器相同的位移控制效果和耗能比例，基底剪力控制效果也得到了明显的提升，说明采用小吨位金属阻尼器通过响应放大便可达到直接安装大吨位阻尼器的相同位移控制效果，体现了其优越的经济性；另外，在极罕遇地震作用下，该装置能避免阻尼器发生位移失效的现象，体现了该消能装置在各级地震作用下均能保证结构和阻尼器的安全。

Scissor-jack-damper energy dissipation system

A new type of CAM response amplifier with metal damper is proposed, and its working mechanism and restoring force calculation formula is introduced. Furthermore, the motion equation and energy equation are established for the single-degree-of-freedom system of CAM response amplifier with metallic damper. Based on the same control effect, the seismic responses of the single-degree-of-freedom systems with larger damping metal dampers and with the cam-type response amplification device of smaller damping metal dampers were analyzed and compared respectively. By using metallic damper and CARD with different design parameters, the control effect was compared and analyzed based on the same displacement under all levels of earthquakes. The results show that all the combined cam-type response amplifying metal dampers can achieve the same displacement control effect and energy dissipation ratio as the traditional metal dampers, and the shear stress control effect is also significantly improved under all levels of earthquakes. The results show that the smaller damping metal damper can achieve the same displacement control effect of the larger damping damper directly by response amplification, which is more economic. In addition, the device can avoid displacement failure of the damper under extremely rare earthquakes, so that the safety of the structure and damper is ensured under earthquakes at all levels.