Study on a new replaceable modular joint dampers

doi:10.1016/j.jcsr.2025.109342

Study on a new replaceable modular joint dampers

2025-04-01

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DOI：10.1016/j.jcsr.2025.109342

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This paper proposes a new shearing type of Modular Perforated Steel Plate Joint Damper (MPSPJ-Damper) for multi-story frame structures in high-intensity earthquake-prone areas, firstly, used in the position of the joints with columns and beams, providing a sequence of manual deductive formulas in damper design based on a conceptual model of 4 springs posed in series-parallel. Based on the ideas of weakening the steel plate plane to form multi-point yielding, local weakening of the core unit is equivalent to the strengthening of other parts. Firstly, the structure characteristics and design method of the damper are described. Then derive the equations related to a single energy-consuming plate, and simplify the energy-consuming part to a series-parallel spring model to deduce the formula of elastic stiffness, elastic yield force, elastic yield displacement, peak load, and hysteresis loading/unloading criterion are derived. Finally, the benchmark specimen was used to study its hysteresis properties, and 12 groups of specimens with different energy dissipation section widths, arc hole height, plate thickness, and metal strength grade were parameterized and analyzed using ABAQUS finite element software. The simulation results were compared with the ones of manual formula calculation. The results show that the new damper hysteresis curve is full, energy consumption performance is good. The minimum gap between the results of theoretical formula calculation and finite element simulation is low to 1.74 %, the maximum is up to 8.47 %, and the average is 4.18 %, indicating that the design model of the damper in this paper is reasonable and reliable. The manual deduction formulas show high degrees of accuracy, which can be used as a theoretical basis for the design and products of this MPSPJ- Damper. After that, the dampers were placed into the steel frame structure to study its damping effect. Comparative analysis of the steel frame before and after installation of MPSPJ-Dampers reveals that energy dissipation capacity of the damper is good, the findings showed that under the earthquake wave, after using the MPSPJ-Damper, the maximum structural interstory displacement angle is reduced by 31.11 %, the strain energy percentage is about 50 %. It reveals that using MPSPJ-Dampers in steel frame structure achieved a satisfied result, meanwhile, providing a reliable theoretical reference in new damper design.

Keywords:

MPSPJ- Damper

Mechanical property

Theoretical formulation

Finite element analysis

Hysteresis performance

Study on a new replaceable modular joint dampers

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