新型SMA耗能器及结构地震反应控制试验研究

利用NiTi合金丝的超弹性性能，本文提出了两种新型SMA被动耗能器，分别称之为拉伸型SMA耗能器和剪刀型SMA耗能器。通过对耗能器的构造设计，安装在耗能器中的NiTi丝始终处于受拉状态，避免了合金丝在结构振动过程中受压屈曲。文中阐述了拉伸型SMA耗能器和剪刀型SMA耗能器的构造及工作原理，并将其安装在模型结构上进行了地震模拟振动台试验，验证了新型SMA耗能器的减振效果。

Experimental investigation of earthquake response reduction of buildings with added two types of SMA passive energy dissipation devices

Two types of NiTi-based passive energy dissipation devices were developed to utilize pseudoelastic property, in which the NiTi wires are always in tension whatever direction of the buildings with added dampers move. Therefore, buckling of the NiTi wires can be avoided even if the diameter of NiTi wire in the damper is very small. The material mechanical tests were done to investigate the dynamic properties of the two SMA dampers and the residual deformation of the NiTi wire were removed by pre-tension before it was connected in the damper. Shaking table tests of a building model without and with two types of SMA dampers, respectively, subjected to earthquake excitations were conducted to verify the response suppression by the dampers.