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李 斌， 高春彥， 王晨飛
（內(nèi)蒙古科技大學(xué)建筑與土木工程學(xué)院，包頭014010）[摘要] 為了研究方鋼管混凝土柱-鋼梁外加強(qiáng)環(huán)節(jié)點(diǎn)的抗震性能，進(jìn)行了四個(gè)方鋼管混凝土柱-鋼梁外加強(qiáng)環(huán)節(jié)點(diǎn)的低周反復(fù)荷載試驗(yàn)，以軸壓比和梁柱線剛度比為參數(shù)，研究分析了該類節(jié)點(diǎn)的滯回曲線、延性、剛度退化、耗能能力及其破壞特征。結(jié)論表明：方鋼管混凝土柱-鋼梁外加強(qiáng)環(huán)節(jié)點(diǎn)滯回曲線飽滿，耗能能力強(qiáng)，剛度退化緩慢，達(dá)到極限荷載后具有良好的延性和后期承載能力。經(jīng)與鋼筋混凝土框架、型鋼混凝土框架及鋼框架節(jié)點(diǎn)比較可知，方鋼管混凝土柱-鋼梁外加強(qiáng)環(huán)節(jié)點(diǎn)具有較好的受力性能和抗震能力，本文的研究成果可用于指導(dǎo)鋼管混凝土結(jié)構(gòu)的工程實(shí)踐。
[關(guān)鍵詞] 方鋼管混凝土；節(jié)點(diǎn)；滯回性能；延性；耗能能力Analysis on Hysteretic Behavior of Steel Beam to Concrete-filled Square Steel Tube Column Connections with Outer Stiffening Ring
Li Bin, Gao Chunyan, Wang Chenfei
( School of Architecture & Civil Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China)Abstract: To understand the seismic behavior of steel beam to concrete-filled square steel tube column connections with outer stiffening ring, through the low cyclic load test of four steel beam to concrete-filled square steel tube column connections with outer stiffening ring, considering the effect on the axial compression ratio and beam-column linear stiffness ratio, the hysteretic curve, ductility, degradation of stiffness, energy dissipation capacity, failure mechanism and characteristics were researched. The results indicate that the steel beam to concrete-filled square steel tube column connections with outer stiffening ring has plum physteretic loops, stronger energy dissipation capacity, slow stiffness degradation, better ductility and steady late load-carrying capacity after the joints reach ultimate loads. Compared with reinforced concrete frame joints, steel reinforced concrete frame joints and steel frame joints, the steel beam to concrete-filled square steel tube column connections with outer stiffening ring has superior mechanical behavior and seismic capacity, the research fruits can direct the engineering practice of concrete-filled steel tube structure.
Keywords: concrete-filled square steel tube; connection; hysteretic behavior; ductility; energy dissipation capacity
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