Experimental Study on Mechanical Properties of Shear Square Section Steel Tube Dampers

Abstract

Based on the excellent performance of shear metal dampers in building seismic capacity, the traditional shear metal damper was optimized. A double-sided shear steel tube damper with simple structure, easy replacement, and wide application is proposed. In order to study the influence of different design parameters on its seismic performance, taking the steel tube length, height, width, thickness, and connection mode as variables, five groups of 15 specimens were designed for experimental research, and the failure modes, characteristic loads and displacements, hysteretic curves, skeleton curves, stiffness degradation curves, and energy dissipation capacity of each specimen were analyzed in detail. The test results showed that the hysteretic curves of each specimen were full and that the energy dissipation capacity was good. The greater the thickness of the steel tube was, the greater the load-bearing capacity of the damper and the larger the hysteresis loop area were. The greater the width of the steel tube was, the greater the equivalent stiffness was. As displacement amplitude increased, the equivalent stiffness of the specimen showed a downward trend. The two connection modes had their own advantages and disadvantages, and a damper with reasonable connection form would need to be selected according to actual engineering needs.

Investigating the behavior of an innovative butterfly‐shaped damper: An experimental and numerical study

“…To achieve this behavior, the damper should yield before other elements of the structures. To that end, the proposed damper is designed based on Equations ( 9) and (10), and then the elements outside the link are designed for the amplified capacity, V design . Using the methodology to design the damper and elements outside the damper, the damper would yield and other elements remain elastic, because all elements outside the damper are designed for forces larger than the capacity of the damper.…”

“…In line with flexural dampers attached between the floor beam and chevron brace, the shear dampers are used, as illustrated in Figure 2, including bare shear plate, 10 stiffened shear plate, 11 I‐shaped, 12 and shear panel 13 . The shear dampers naturally enjoy higher lateral strength and lateral stiffness than flexural dampers.…”

Modelling, Test and Practice of Steel Structures

“…Nine papers focused on the mechanical properties of the components and joints of steel and steel-based composite structures, which presented investigations on shear square section steel tube dampers [4], diagonally stiffened steel plate walls [5], offshore platform deck structures [6], ship local structures [7], an L-shaped column composed of RAC-filled steel tubes [8], corrugated steel plate shear walls [9], partially connected steel plate shear walls [10], pipe-in-pipe systems [11], and bolted ball-cylinder joints [12].…”