- 摘 要
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（1 內蒙古科技大學建筑與土木工程學院，包頭 014010； 2 陜西省現代建筑設計研究院，西安 710048）
［摘要］完成了四個矩形鋼管混凝土框架節(jié)點（外加強環(huán)）模型的擬靜力試驗。研究表明：矩形鋼管混凝土框架節(jié)點滯回曲線飽滿，耗能能力強；達到極限荷載后具有良好的延性和穩(wěn)定的后期承載能力，位移延性系數在3.5～4.76之間，滿足延性節(jié)點的要求，具有較好的受力性能和抗震能力。梁柱線剛度比較大的試件具有較高的承載力和彈性階段剛度，增大軸壓比對試件的彈性剛度影響不大，但隨著軸壓比的增加，試件的后期變形能力有減小的趨勢。
［關鍵詞］矩形鋼管混凝土；框架節(jié)點；擬靜力試驗；滯回性能；延性；耗能
Quasi-static experimental research for concrete-filled rectangular steel tubular frame joints
Li Bin1, Gao Chunyan1, Shi Xiaoyan2(1 School of Architecture and Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China；2 Institute of Modern Architecture Design in Shannxi, Xi′an 710055, China)
Abstract:The quasi-static test of four concrete-filled rectangular steel tubular（CFRST）frame joint(exterior stiffened ring) models were finished. The results indicate that the CFRST frame joints have plump hysteretic loops, stronger energy dissipation capacity, better ductility and steady late load-carry capacity after the joints reach ultimate loads, the ductility coefficient is between 3.5 and 4.48, the joints can meet the requirement of ductile joint, and have superior mechanical behavior and seismic capacity. The specimen whose beam-column linear stiffness level is higher has higher load-carrying capacity and elastic stiffness, the increase of axial load level has little effect on the elastic stiffness, but with the augment of the axial load level, the late deformation ability will minish.
Keywords:concrete filled rectangular steel tube; frame joint; quasi-static test; hysteretic behavior; ductility; energy dissipation
內蒙古自然科學基金項目（200711020701），包頭市科技攻關項目（2006z1004），內蒙古教育廳資助項目（NJ06141）。
作者簡介：李斌，博士，教授， Email:btlibin@189.cn。
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