种迅, 朱东, 蒋庆, 黄俊旗, 冯玉龙, 宋磊. 外挂墙板采用耗能连接钢框架结构抗震性能研究[J]. 工程力学, 2022, 39(7): 194-204. DOI: 10.6052/j.issn.1000-4750.2021.04.0279
引用本文: 种迅, 朱东, 蒋庆, 黄俊旗, 冯玉龙, 宋磊. 外挂墙板采用耗能连接钢框架结构抗震性能研究[J]. 工程力学, 2022, 39(7): 194-204. DOI: 10.6052/j.issn.1000-4750.2021.04.0279
CHONG Xun, ZHU Dong, JIANG Qing, HUANG Jun-qi, FENG Yu-long, SONG Lei. STUDY ON SEISMIC BEHAVIOR OF STEEL FRAME WITH CLADDING PANEL AND ENERGY DISSIPATING CONNECTIONS[J]. Engineering Mechanics, 2022, 39(7): 194-204. DOI: 10.6052/j.issn.1000-4750.2021.04.0279
Citation: CHONG Xun, ZHU Dong, JIANG Qing, HUANG Jun-qi, FENG Yu-long, SONG Lei. STUDY ON SEISMIC BEHAVIOR OF STEEL FRAME WITH CLADDING PANEL AND ENERGY DISSIPATING CONNECTIONS[J]. Engineering Mechanics, 2022, 39(7): 194-204. DOI: 10.6052/j.issn.1000-4750.2021.04.0279

外挂墙板采用耗能连接钢框架结构抗震性能研究

STUDY ON SEISMIC BEHAVIOR OF STEEL FRAME WITH CLADDING PANEL AND ENERGY DISSIPATING CONNECTIONS

  • 摘要: 提出一种适用于钢框架和整间外挂墙板间的耗能连接方式。为研究这一连接方式对钢框架抗震性能的影响,对两榀分别采用X型和U型钢板消能器作为耗能连接的钢框架和一榀作为对比的纯钢框架试件进行了拟静力试验研究,并对所采用的两种消能器进行了拟静力试验研究。结果表明:X型钢板消能器疲劳加载阶段发生核心板局部屈曲,最终核心板在根部发生疲劳断裂;U型钢板消能器整个加载过程中仅出现轻微裂纹,疲劳性能较好;两种消能器滞回环均较为饱满,均存在屈服后强化现象。由于核心板的薄膜效应,X型钢板消能器强化更明显;三榀钢框架试件的破坏模式相同,外挂墙板和耗能连接未改变钢框架本身的损伤机制;试件GKJ-1由于X型钢板消能器的薄膜效应,导致外挂板在加载后期受拉产生裂缝,且最终一侧螺栓被剪断而破坏;试件GKJ-2加载结束后消能器未出现任何破坏现象,外挂板也未发现任何破坏现象;采用耗能连接的外挂墙板对钢框架的初始刚度、承载力和耗能能力均有一定程度贡献。

     

    Abstract: An energy dissipating cladding panel connecting method for steel frames was proposed. In order to study the effect of this new kind of connecting method on the seismic behavior of the main structure, quasi-static cyclic tests were carried out on two steel frames with X- or U-shaped steel dampers as the energy dissipating connections and one bare steel frame counterpart. The quasi-static cyclic tests of the two kinds of dampers were carried out as well. The test results indicated that local buckling occurred on the X-shaped dampers during the fatigue loading stage, and the final failure was governed by the fracture of the core board; the U-shaped dampers only presented slight cracks in the fatigue loading stage and showed better fatigue performance; the hysteresis loops of the two kinds of dampers were plump and showed hardening stages, and the X-shaped damper showed a more obvious hardening effect owing to the membrane effect of the core board; the failure modes of the three steel frames were similar, and the damage mechanism of the steel frame was not altered by the cladding panels; cracks occurred on the cladding panel of GKJ-1 in the final loading stage due to the membrane effect of the X-shaped dampers, and the final failure mode of the specimen was governed by the broken of the connecting bolt between the cladding panel and the beam; no damage was observed in the U-shaped dampers and cladding panel of GKJ-2; the cladding panels with energy dissipating connections could increase the stiffness, strength and hysteresis energy of the steel frame.

     

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