- 摘 要
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(同濟(jì)大學(xué)建筑設(shè)計(jì)研究院 上海 200092)
【提要】 通過9個節(jié)點(diǎn)模型的低周反復(fù)荷載試驗(yàn)，研究了方鋼管混凝土柱與鋼梁相接節(jié)點(diǎn)的抗震性能。試驗(yàn)結(jié)果表明，試件有很好的彈塑性變形能力和較好的耗能能力，滯回曲線比較飽滿；達(dá)到最大承載力時，大部分試件的鋼管柱轉(zhuǎn)角即層間位移角超過1/100；承載力下降時，滯回曲線的捏攏不明顯；含鋼率對內(nèi)隔板式節(jié)點(diǎn)承載力影響很大，尤其是柱壁厚度；內(nèi)隔板節(jié)點(diǎn)比錨定式節(jié)點(diǎn)具有更好的承載能力，但延性比后者要小；T字形節(jié)點(diǎn)壓彎性能比拉彎性能更好。用ANSYS程序?qū)υ囼?yàn)進(jìn)行了計(jì)算機(jī)模擬對比。
【關(guān)鍵詞】 矩形鋼管混凝土 梁柱節(jié)點(diǎn) 抗震性能 有限元分析
Experimental Studies and FEM Analysis of Seismic Behavior of Connection Between Concretefilled Rectangular Tubular Column and Steel Beam/Jin Gang,Ding Jiemin,Chen Jianbin
(Institute of Architecture Design and Research of Tongji University,Shanghai 200092,China)
Abstract:Through the experiment of nine concrete filled steel tubular columnsteel beam
joint specimens subjected to cyclic lateral load,the seismic behavior of the specimen is studied.The specimens have large elasticplastic deformation capacity and exhibit good energy dissipation capacity.The hysteresis loops are plump and the rotation angle of the column is larger than 1/100 for most specimens when the maximum load is reached.At the descending stage of lateral load,the loops have differing extent of pinch.The steel content has a visible effect on the final strength of joints,such as the thickness of steel tube.The CFRT column with steel diaphragm has better resistant capacity than the column with steel anchor.The experiment is simulated by ANSYS program and is compared with the experiment one.
Keywords:concrete filled rectangular tube(CFRT); joint of column and beam; seismic performance; finite element analysis
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