半刚性框架-屈曲约束钢板剪力墙结构振动台试验研究

为研究半刚性框架-钢板剪力墙结构的抗震性能，进行了1个缩尺比为1/3的单跨4层钢框架-屈曲约束钢板剪力墙的振动台试验。试验采用模拟地震动的方法，选取El Centro波、Taft波和一条人工合成波，分析在7度多遇至9度罕遇共计8个水平地震作用工况下结构的动力特性和动力响应。研究结果表明：在多遇地震作用下，结构无明显塑性变形；罕遇地震作用时，1、3层墙板大部分区格形成拉力带。随着地震激励的增大，结构刚度逐渐退化，9度罕遇地震输入后结构抗侧刚度最大降幅仅为12%；屈曲约束钢板墙作为第一道抗震设防防线，率先进入弹塑性工作阶段，吸收耗散地震能量，避免框架发生破坏；在多遇及罕遇地震作用下结构的层间位移角分别为1/476和1/68，均满足我国现行抗震规范对层间位移角限值的规定。结构整体表现出优异的抗震性能，满足我国“两阶段，三水准”抗震设防要求。

Shaking table test of semi-rigid frame with buckling-restrained steel plate shear walls

A 1/3 scaled one-span four-story semi-rigid steel frame with buckling-restrained steel plate shear wall was tested on the shaking table to research the seismic performance of this structure. The El Centro wave, Taft wave and an artificial wave were selected as the simulated earthquake input. The dynamic characteristics and response of the specimen were analyzed for 8 cases under the horizontal earthquake action from frequent earthquake level of 7 degree fortification intensity to rare earthquake level of 9 degree fortification intensity, respectively. The research results show that the specimen has no obvious plastic deformation under frequent earthquakes. Most of the wallboards in the grid at the first and third stories form tension belt under rare earthquakes. The lateral stiffness is degraded gradually with the increase of earthquake excitation, and the maximum decrease is only 12% under rare earthquake level of 9 degree fortification intensity. The buckling-restrained steel plate shear walls enter elasto-plastic phase firstly as the initial seismic fortification line and can avoid the damage of the frame through absorbing and dissipating seismic energy. The maximum inter-story drift ratio of the structure is 1/476 and 1/68 under frequent earthquakes and rare earthquakes respectively, both meeting the inter-story drift ratio limits required in the current seismic design code of buildings. The structure has good seismic performance and can satisfy the two-phase and three-level seismic fortification requirements.