新型钢棒阻尼器隔震橡胶支座抗震性能试验研究

Experimental study on the seismic performance of a new type of isolation rubber bearing with U-shaped steel bar damper

提出一种新型U型钢棒阻尼器,该阻尼器通过冷弯加工成型,通过高强螺栓安装在普通无铅芯橡胶隔震支座上发挥消能减震作用。首先通过一系列试验对U型钢棒阻尼器的耗能能力、延性、刚度和疲劳性能进行了研究,发现其具有良好的抗震性能。然后对由U型钢棒阻尼器和普通无铅芯橡胶隔震支座组合而成的新型橡胶隔震支座进行了剪切试验研究。试验结果表明,该新型隔震支座的等效水平刚度、屈服后刚度和屈服力等各项受力性能都比铅芯橡胶支座有了很大的提高。与铅芯橡胶支座比较,该新型隔震支座具有更好的耗能性能,可以广泛应用于隔震和减震工程中。

A new type of U-shaped steel bar damper was proposed. The damper was formed by cold bending process and was installed on normal non-lead isolation rubber bearing by high strength bolts to dissipate energy. Firstly,a series of experiments were made to study the capability of energy dissipation,ductility,rigidity and fatigue performance of the U-shaped steel bar damper,and it showed excellent seismic performance. Then the new type of rubber isolation bearing composed of normal non-lead isolation rubber bearing and U-shaped steel bar damper was tested by shear test. Results show that all the mechanical performances（ including equivalent horizontal stiffness,stiffness after yielding and yielding force） of this new type of isolation bearing are better than the lead rubber bearing. Compared with lead rubber bearing,the new isolation bearing has excellent capability of energy dissipation and can be widely used in isolation projects and energy dissipated projects.