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(沈陽工業(yè)大學(xué)建筑與土木工程學(xué)院， 沈陽 110870)
［摘要］對低周循環(huán)荷載作用下的復(fù)式鋼管混凝土柱-鋼梁節(jié)點(diǎn)的抗震性能進(jìn)行了有限元模擬，并與試驗(yàn)作對比，結(jié)果表明模擬值與試驗(yàn)結(jié)果吻合較好。在此基礎(chǔ)上，又分別模擬分析了低周循環(huán)荷載作用下的復(fù)式鋼管混凝土柱-鋼管混凝土梁節(jié)點(diǎn)、單層鋼管混凝土柱-鋼管混凝土梁節(jié)點(diǎn)的抗震性能，綜合分析評定三種組合結(jié)構(gòu)節(jié)點(diǎn)的耗能能力、延性、剛度退化及強(qiáng)度退化等抗震性能指標(biāo)。分析結(jié)果表明，三種組合結(jié)構(gòu)節(jié)點(diǎn)的破壞模式均是首先在梁根部產(chǎn)生塑性鉸進(jìn)入塑性狀態(tài)。在柱子均采用復(fù)式鋼管混凝土的情況下，將鋼梁用鋼管混凝土梁替換能夠有效地提高節(jié)點(diǎn)的抗震性能；在除去復(fù)式鋼管混凝土柱中內(nèi)嵌圓鋼管的情況下，將鋼梁用鋼管混凝土梁替換仍可在一定程度上提高節(jié)點(diǎn)的抗震性能。
［關(guān)鍵詞］鋼管混凝土； 節(jié)點(diǎn)； 有限元； 抗震性能
中圖分類號：TU398-9文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)14-0042-06
Research on seismic behavior of new multiple concrete filled steel tube column-beam joints
Wang Ying， Bi Lingyun
（School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China）
Abstract:Seismic behavior of multiple concrete filled steel tube column-steel beam joint under low cyclic loading was carried out by finite element simulation, and compared with experiment. The results show that the simulated values are in good agreement with experimental results. Subsequently, seismic behavior of multiple concrete filled steel tube column-single layer concrete filled steel tube beam joint, single layer concrete filled steel tube column-single layer concrete filled steel tube beam joint under the low cycle load was simulated and analysed respectively. Energy dissipation capacity, ductility, stiffness degradation and strength degradation of three kinds of composite structural joints were evaluated and analysed. The results show that the failure modes of the three composite structural joints are the first to generate plastic hinges into the plastic state at the root of the beam. In the case of multiple concrete filled steel tube column, the single layer concrete filled steel tube beam instead of steel beam can effectively improve the seismic performance of the joint. Under the situation of removing the round steel tube which embedded in multiple concrete filled steel tube column, the single layer concrete filled steel tube beam instead of steel beam can still improve the seismic performance of joint to some extent.
Keywords:concrete filled steel tube; joint; finite element; seismic behavior
*國家自然科學(xué)基金（51008199）。
作者簡介：王穎，博士，副教授，碩士生導(dǎo)師，Email: wangying30@hotmail.com。
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