ABSTRACT

A novel, simple to apply, and economic buckling restrainer system is introduced for steel plate shear walls. The shear wall panel is restrained by parallel non-welded channel restrainers, which are installed on both sides of the steel panel. A set of experiments were designed to examine improvement in the seismic performance of the shear wall due to the application of the proposed restrainer system. Three 1/4-scale down single-story single-bay steel panel specimens including one panel without and two panels with different number of restainers are subjected to cyclic loading. The behavior of steel panel with and without the restrainers is assessed in terms of initial stiffness, ultimate loading capacity, stiffness/strength degradation, and energy dissipation capacity. The use of the proposed restrainer system significantly improves the energy dissipation capacity of the shear wall and this enhancement is increasing at larger drifts. Employing the proposed restrainer system, there is only a slight increase in the ultimate loading capacity, and at the same time, a significant increase in the initial stiffness of the shear wall. No strength degradation is observed for the range of the drifts up to 5%. A design recommendation for the sizing of the parallel restrainer components is also included.

摘要

介绍了一种用于钢板剪力墙的新型、易于应用、经济的屈曲约束系统。剪力墙面板由平行的非焊接槽形约束器约束，安装在钢板的两侧。设计了一组实验来检查由于应用所提出的约束系统而导致的剪力墙抗震性能的改进。三个 1/4 比例缩小的单层单开间钢板试件，包括一块不带和两块不同数量的保持器的面板，经受循环加载。根据初始刚度、极限承载能力、刚度/强度退化和能量耗散能力评估带和不带限制器的钢板的行为。所提出的约束系统的使用显着提高了剪力墙的能量耗散能力，并且这种增强在较大的漂移时会增加。采用所提出的约束系统，极限承载能力仅略有增加，同时，剪力墙的初始刚度显着增加。对于高达 5% 的漂移范围，没有观察到强度下降。还包括平行限制器组件尺寸的设计建议。对于高达 5% 的漂移范围，没有观察到强度下降。还包括平行限制器组件尺寸的设计建议。对于高达 5% 的漂移范围，没有观察到强度下降。还包括平行限制器组件尺寸的设计建议。