为解决自复位支撑耗能能力不足且来源单一、耗能材料成本高昂的问题，提出了一种新型自复位复合阻尼耗能支撑。支撑由金属屈服阻尼装置、粘弹阻尼装置并联预压碟簧自复位装置组成。对其基本构造和工作原理进行阐述，通过精细化模拟研究了支撑的耗能、复位、承载和变形能力。结果表明，在往复荷载作用下，支撑的滞回响应具有稳定饱满的旗形特征，拉压对称、无残余变形，能够兼顾不同加载频率下的性能需求。揭示了支撑加载制度和设计参数对其滞回性能的影响规律，结果表明，加载频率从0.3Hz增加到2.0Hz，粘弹阻尼装置提供的阻尼力增大，支撑耗能量由8.32kJ增加到11.93kJ；随着碟簧预压力的增加，支撑激活力从378.98kN增加到562.67kN，复位性能始终得到充分发挥；支撑耗能能力主要受三角形钢板个数和粘弹材料剪切面面积影响，增加4个三角形钢板或将粘弹材料剪切面面积从140mm×140mm增加到300mm×140mm，支撑的等效粘滞阻尼比分别同比增长39.93%和16.09%。
Abstract
In order to solve the problem of insufficient and single source of energy dissipation capacity, and high cost of energy dissipation materials in self-centering brace, a new type of self-centering composite damping energy dissipation brace is proposed. The brace is composed of a metal yielding damping device and a viscoelastic damping device, which are in parallel with a recentering device with pre-pressed disc springs. The basic configuration and working principle of the brace are introduced, and the energy dissipation, recentering, bearing and deformation capacities of the brace are studied by refined numerical simulation. The results show that under the action of reciprocating loading, the hysteretic response of the brace exhibits a stable and full flag-shaped characteristic, with symmetrical tension and compression capacities and no residual deformation, which can meet the behavior requirements under different loading frequencies. The effects of the loading scheme and design parameters of the brace on its hysteretic performance are analyzed. The results show that when the loading frequency increases from 0.3Hz to 2.0Hz, the damping force provided by the viscoelastic damping device increases, and the energy dissipation of the brace increases from 8.32kJ to 11.93kJ. With the increase of the pre-pressed force of disc springs, the activation force of brace increases from 378.98kN to 562.67kN, and its recentering capability is always fully utilized. The energy dissipation capacity of the brace is mainly affected by the number of triangular steel plate and the shear surface area of viscoelastic material. When the number of triangular steel plate increases by 4, or the shear surface area of viscoelastic material increases from 140mm×140mm to 300mm×140mm, the equivalent viscous damping ratios of the brace respectively increase by 39.93% and 16.09%.
关键词
自复位支撑 /
粘弹阻尼 /
金属屈服阻尼 /
碟形弹簧 /
滞回性能 /
残余变形
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Key words
self-centering brace /
viscoelastic damping /
metal yield damping /
disc spring /
hysteretic performance /
residual deformation
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参考文献
[1] Dong H H, Du X L, Han Q, et al. Performance of an innovative self-centering buckling restrained brace for mitigating seismic responses of bridge structures with double-column piers[J]. Engineering Structures, 2017, 148: 47-62.
[2] Christopoulos C, Tremblay R, Kim H J, et al. Self-centering energy dissipative bracing system for the seismic resistance of structures: development and validation[J]. Journal of Structural Engineering, 2008, 134(1): 96-107.
[3] Tremblay R, Lacerte M, Christopoulos C. Seismic response of multistory buildings with self-centering energy dissipative steel braces[J]. Journal of Structural Engineering, 2008, 134(1): 108-120.
[4] 刘璐, 吴斌, 李伟, 等. 自复位防屈曲支撑结构动力位移反应的关键参数[J]. 工程力学, 2016, 33(1): 188-194.
Liu L, Wu B, Li W, et al. Key parameters of structure with self-centering buckling-restrained braces for seismic analysis[J]. Engineering Mechanics, 2016, 33(1): 188-194.
[5] 谢钦, 周臻, 王维影, 等. 两种设计原则下自定心屈曲约束支撑框架的抗震性能分析[J]. 振动与冲击, 2017, 36(3): 125-131.
Xie Q, Zhou Z, Wang W Y, et al. Aseismic performance analysis for braced frame systems with self-centering buckling-restrained braces with two different design criteria[J]. Journal of Vibration and Shock, 2017, 36(3): 125-131.
[6] 王永玮, 周臻, 赵坤松. 变摩擦自复位支撑钢框架的抗震性能影响因素研究[J]. 振动与冲击, 2022, 41(24): 104-110.
Wang Y W，Zhou Z，Zhao K S. Influence factor analysis on seismic performance of avariable friction damper self-centering braced steel frame[J]. Journal of Vibration and Shock, 2022, 41(24): 104-110.
[7] 张艳霞, 黄威振, 刘安然, 等. 自复位免修复摩擦耗能支撑性能研究[J]. 振动与冲击, 2018, 37(4): 136-146.
Zhang Y X, Huang W Z, Liu A R, et al. Study on behavior of self-centering and free-repair brace with friction damper[J]. Journal of Vibration and Shock, 2018, 37(4): 136-146.
[8] Fang C, Wang W, Zhang A, et al. Behavior and design of self-centering energy dissipative devices equipped with superelastic SMA ring springs[J]. Journal of Structural Engineering, 2019, 145(10): 04019109.
[9] Xu L H, Fan X W, Li Z X. Experimental behavior and analysis of self-centering steel brace with pre-pressed disc springs[J]. Journal of Constructional Steel Research, 2017, 139: 363-373.
[10] Xu L H, Xie X S, Li Z X. Development and experimental study of a self-centering variable damping energy dissipation brace[J]. Engineering Structures, 2018, 160: 270-280.
[11] Qiu C X, Cheng L Z, Du X L. Performance-based plastic design of multi-story hybrid braced frames with buckling-restrained braces and shape memory alloy braces[J]. Journal of Constructional Steel Research, 2022, 198: 107576.
[12] Qiu C X, Cheng L Z, Du X L. Seismic design of hybrid braced frames with self-centering braces and fluid viscous damping braces[J]. Engineering Structures, 2023, 280: 115728.
[13] Ping Y W, Fang C, Shi F, et al. Experimental and numerical studies on SMA-viscoelastic hybrid self-centering braces[J]. Smart Materials and Structures, 2022, 31(9): 095048.
[14] 沈星, 倪晓博, 叶爱君. 桥梁新型横向金属阻尼器研究[J]. 振动与冲击, 2014, 33(21): 96-101.
Shen X, Ni X B, Ye A J. A new type of metallic damper for bridges’aseismic performance in transverse direction[J]. Journal of Vibration and Shock, 2014, 33(21): 96-101.
[15] Lin Z C, Xu L H, Xie X S. Development and seismic performance improvement of hybrid damping self-centering braced frame[J]. Journal of Building Engineering, 2022, 52: 104388.
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