Slit dampers are a specific type of metallic yielding dampers, which are created by cutting a series of slits/openings in metal plates subjected to in-plane shear deformation. These slits/openings divide the metal plates into a number of links that dissipate the input energy through their plastic in-plane deformations. In this paper, a new brace-type slit damper (BSD) is proposed, and the behavior of the structure equipped with it is studied numerically. It consists of two diagonal members on both sides of a slit plate with a designed geometry for its links. Each diagonal member is pinned to the beam at one end and at the other end is only constrained against out-of-plane displacement by a gusset plate. First, the accuracy of numerical models is validated by a series of available experimental results. Then, a parametric study is performed on the frames equipped with the proposed damper to determine the effects of geometrical parameters of the damper on the behavior of the frame. After that, analytical equations are developed to predict the behavior of BSD and structures equipped with it. A simple and robust method is also proposed to simulate the behavior of all damper components with an equivalent diagonal member in structural analysis softwares. Afterwards, using this approach, several multi-story building frames equipped with the proposed damper are modeled and the seismic behavior of these frames is evaluated using nonlinear time history analyses. The results show that all studied frames have completely stable hysteresis curves under all records, and no crack was observed in the damper links at the end of the loadings. According to the obtained results, it can be concluded that the proposed damper can be used as an efficient energy dissipating device in building structures.

狭缝阻尼器是金属屈服阻尼器的一种特殊类型，它是通过在经受平面内剪切变形的金属板上切割一系列狭缝/开口而形成的。这些狭缝/开口将金属板划分为多个链接，这些链接通过其塑性面内变形来耗散输入能量。本文提出了一种新型的撑杆式缝隙阻尼器（BSD），并对其结构进行了数值研究。它由狭缝板两侧的两个对角线部件组成，其链节设计成几何形状。每个对角构件的一端都固定到梁上，而另一端仅通过角撑板约束以防止平面外位移。首先，通过一系列可用的实验结果验证了数值模型的准确性。然后，对装有建议的减振器的车架进行参数研究，以确定减振器的几何参数对车架性能的影响。此后，建立了解析方程来预测BSD及其配备的结构的行为。还提出了一种简单而健壮的方法来模拟结构分析软件中具有等效对角线构件的所有阻尼器部件的行为。然后，使用这种方法，对装备有该阻尼器的几个多层建筑框架进行建模，并使用非线性时程分析来评估这些框架的抗震性能。结果表明，所有研究的框架在所有记录下均具有完全稳定的磁滞曲线，并且在载荷结束时在阻尼连杆中未观察到裂纹。