# Effects of Diagonal Friction Dampers on Behavior of a Building
## 1 Introduction
It was determined that the damping device reduced the period and displacements of the structure and significantly increased the performance of the structure [16]. According to [PERSON] et al., a nonlinear time history analysis was used on a seven-story reinforced concrete building to examine the impact of friction dampers on building behavior. For three different configurations with non-damping moment-resisting frames, and X-braced and inverted X-braced friction dampers, various earthquake ground motion recordings were used. The maximum story drifts and base shear forces were compared. In terms of overall performance, the buildings with friction dampers outperformed the others [17]. Friction dampers can be used as supports at beam ends, swing walls, or beam ends, such as sliding joints (SHJ) used in steel moment frames [18; 19; 20]. [PERSON] et al. developed a new precast self-centering rocking shear wall system (PSCRSW) with V-shaped steel braces and a pre-pressed disc spring steel moment-resisting friction damper (PDSFD). They worked to increase the seismic resistance of the frame (SMRF). They proposed an effective seismic-resistive design method for the development of SMRF capable of simultaneously achieving the interstory drift ratio targets and the expected roof drift ratios [21]. [PERSON] et al. conducted an experimental seismic performance evaluation on the shaking table of a three-story steel-framed structure at a 1/3 scale, which was supported by a resilient variable friction brace (RVFB). Under the influence of various earthquake accelerations, the RVFBF accelerations, drifts, and shear forces of RVFBF were evaluated. The columns of the RVFBF behaved mostly in an elastic manner during the experiment, and their natural frequency was 10% lower than their initial frequency after the strongest ground motion effect [22]. [PERSON] and [PERSON] modified a steel frame. They tested the friction damper on a shaking table using earthquake acceleration records. They applied various seismic recordings to numerical models of a four-story steel frame with and without dampers. They showed that the base shear force and lateral displacements of the multi-story building using dampers were significantly reduced [23]. [PERSON] et al. performed experiments on a shaking table with 16 different earthquake acceleration records of an ordinary brace system with concentric friction damping. They showed that the friction damper reduces the acceleration of the frame by 25% and increases the structural damping of the frame by an average of 6.74% [24]. [PERSON] and [PERSON] analyzed the maximum drift and interstory drift of a frame structure exposed to seismic effects in four different soil classes. They concluded that the damping effect was significant on floors with friction dampers, but less so on the other floors [25]. Studies have been carried out on the optimal characteristics and designs of sway-rocking(SR) motion and inelastic single-story steel moment-resisting frames (SMRF) [26; 27]. The effects of various serviceability circumstances on a linear-motion friction damper were studied by [PERSON] and [PERSON] [28]. A lever viscoelastic wall (LVEW) is a new steel wind- and earthquake-resistant wall that [PERSON] et al. developed. It comprises a velocity-dependent VE damper and a displacement-dependent friction damper in a device that has two distinct motion phases [29]. In this study, we aimed to fill the gap in the literature on this subject by examining the effect of a friction damper on the behavior of a building when it was placed on certain floors, but not all floors, of the building. For this purpose, experimental and numerical studies were carried out using a single-span, five-story model building. The dimensions of the model building used were determined by scaling a real-size building appropriately. In order to verify the numerical model, the periods obtained as a result of the modal analysis and the free vibration periods of the experimental models were taken into account.