*Article* **Experimental Investigation on the Mechanical Properties of Curved Metallic Plate Dampers**

#### **Jie Zheng 1, Chunwei Zhang 2,\* and Aiqun Li 3,4,5**


Received: 11 November 2019; Accepted: 24 December 2019; Published: 30 December 2019

**Abstract:** This study proposes a novel curved steel plate damper to improve the seismic performance of structures. The theoretical analysis of the curved plate damper was carried out deriving formulas of key parameters of the curved plate damper including elastic lateral sti ffness, yield strength, and yield displacement. Moreover, a cyclic loading test of four sets of specimens was conducted, and the hysteretic performance, ductility, energy dissipation performance, and strain of the specimens were studied. The results showed that the initial sti ffness of the damper was large, no obvious damage was observed, and the hysteresis loop was full. The tested dampers had good deformation and energy dissipation performance. The stress variable rule of the damper was obtained by stress analysis, where the plastic deformation at the end of the semi-circular arc was large. The formula for various parameters of the damper was compared with experimental and numerical results; thus, the value of the adjustment coe fficient was determined reasonable. Meanwhile, the rationality of the finite element model was also verified.

**Keywords:** metal damper; performance parameter; cyclic loading test; hysteretic behavior; energy dissipation capability
