Experimental and numerical study on bent shear panel damper made of BLY160 steel. (1st June 2022)

• Record Type: Journal Article
• Authors: Zhao, Ji-Zhi; Tao, Mu-Xuan; Wu, Zhen-Hao; Zhuang, Liang-Dong
• Is Part Of: Engineering structures. Volume 260(2022)
• Publication Date: 2022-06-01
• Subjects: Low-yield-point steel -- Bent shear panel damper -- Cyclic behavior -- Energy dissipation capacity; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2022.114229
• Languages: English
• ISSNs: 0141-0296

Abstract

Graphical abstract: A novel type of SPDs with bent web panels (BSPDs) is developed, in which the end plate of the BSPD is connected to the web of the composite beam. In this configuration, the bending moment resulting from the SPDs can be minimized, thereby reducing the damage to the concrete slab. In this study, twelve specimens were designed and tested under quasi-static hysteretic loading to investigate the influence of web thickness, constrained flange, out-of-plane buckling restraint, and BSPD length ratio on the mechanical properties of BSPDs. Furthermore, the failure modes and hysteretic force–displacement curves of BSPDs made of low-yield-point steel are obtained through the tests. Based on the results, the effects of design parameters on stiffness, shear strength, deformation capacity, overstrength factor, and energy dissipation capacity of BSPDs were analyzed. The excellent mechanical properties of the low-yield-point steel enabled the BSPD to yield in lower strength and dissipate energy at a larger deformation. Moreover, introducing the constrained flange and reducing the BSPD length ratio can further improve the seismic performance of the BSPD. Finally, finite element models were established to simulate the cyclic behavior of BSPDs. Highlights: A novel type of Shear Panel Dampers with bent web (BSPDs)are proposed to alleviate the damage of the concrete slab. The seismic performance of the BSPDs are verified with experiments. Key parameters on the BSPDs performance are analyzed based on the experiment results. The proposed shear strength formula in the code is modified based on the experiment results. Finite element models are established to simulate the complex mechanical properties of the BSPDs. Abstract: Shear panel dampers (SPDs) are widely used in eccentrically braced composite frames (EBCFs) to effectively increase their stiffness and strength and dissipate input energy through plastic deformation in seismic conditions. However, these vertically installed SPDs could also impose an additional bending moment and axial forces on the composite beam in the frame, thus damaging the concrete slab of the frame. The SPDs used in this study were bent in the middle and connected to the web of the composite beam in the frame to overcome the drawbacks of traditional SPDs. Therefore, the resulted bending moment and axial force by the SPDs can be minimized, thus controlling the damage to the concrete slab. In this study, the cyclic behavior of the bent SPDs (BSPDs) made of low-yield-point steel is experimentally studied. Twelve specimens were designed and tested under quasi-static hysteretic loading to investigate the influence of web thickness, constrained flange, out-of-plane buckling restraint, and BSPD length ratio on the mechanical properties of BSPDs. Furthermore, the failure modes and hysteretic force–displacement curves of BSPDs made of low-yield-point steel are obtained through the tests. Finally, finite element models were established to simulate the cyclic behavior of BSPDs and analyze the key factors affecting the mechanical properties of BSPDs.