框架结构施加弹簧阻尼器的抗震减振性能的实验研究

摘要

应用实验的方法研究了阻尼器对框架结构的抗震减振效果，采用试验模态分析的方法测试楼房框架结构相似模型的固有特性。分析模型在不同楼层施加弹簧阻尼器与未施加弹簧阻尼器的固有特性的变化情况；并利用水平振动台对楼房框架结构在施加弹簧阻尼器前后不同工况进行地震响应试验研究。结果表明，施加弹簧阻尼器后楼房框架结构的固有频率和振型变化很小；但会增加其模态阻尼比，从而降低了结构对地震激励的响应，达到结构抗震减振的目的，在较低层施加弹簧阻尼器比在较高层施加效果更明显。%Experiment method was applied to study the seismic vibrational control effect of applying damper on frame, use modal analysis to test the inherent characteristic of the similar building model, analyce the different situ-ation of the model natural feathers in different layer when it’ s original or after applying spring dampers, and carry out an experiment about whether the spring damper is applied on frame or not in different conditions with the help of the vibrational system, in order to make research on earthquake excitation.The results show, after applying the spring dampers, the natural frequencies and vibrational modes have little change.But the modal damping ratio of building is increased, so that the reflection of the building to earthquake excitation is decreased, and the goal of seismic vibrational control is achieved.Besides, spring dampers have better effect when they’ re applied on the higher layers than the lawer ones.