Experimental study on mechanical properties of assembled X-shaped steel plate piston damper and its application

被引：0
|
作者：
Zhou F. [1 ]
Hu Y. [1 ]
Ye K. [1 ]
Lü Y. [1 ]
机构：
[1] School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2024年 / 45卷 / 08期
关键词：
assembled; energy dissipation; hysteretic curve; piston damper; X-shaped steel plate;
D O I：
10.14006/j.jzjgxb.2023.0153
中图分类号：
学科分类号：
摘要：
To overcome the difficulty in traditional bending and shearing metal dampers being used in elbow-type displacement amplification devices, X-shaped piston metal damper (XPMD) was proposed by utilizing yielding of X-shaped steel plate to dissipate energy. The damper was comprised of a set of parallel metal rings (X-shaped steel plate is the main energy dissipation element), internal transmission rod, and external sleeve. The energy dissipation element was easy to install and replace in the case of failure. The effects of variations in end width, necking width, longitudinal length and thickness of the X-shaped steel plate on the hysteretic performance of XPMD was investigated in detail. Meanwhile, a theoretical mechanical evaluation model for XPMD dampers was proposed. Taking a multistory frame as an example, the variation characteristics of the inter-story displacement and inter-story shear force before and after the installation of XPMD under seismic excitation were analyzed, and the damping effect of XPMD on the frame structure was verified. This study indicates that the proposed damper has stable hysteretic behavior under cyclic loads, the seismic input energy is dissipated through flexural yielding of X-shaped steel plate at small deformations. At large deformation, tensile behavior is generated, which will cause increase in stiffness of the damper system. The installation of XPMD can significantly reduce the inter-story displacement and inter-story shear force response of frame structure under earthquake excitation. © 2024 Science Press. All rights reserved.
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页码：205 / 215
页数：10
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