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（1中國建筑第七工程局有限公司， 鄭州 450007； 2 重慶大學土木工程學院， 重慶 400044）
［摘要］在對國內外對裝配式結構節(jié)點的研究基礎上，提出了裝配式鋼管混凝土柱-帶鋼接頭鋼筋混凝土梁節(jié)點，進行了6個足尺節(jié)點模型的低周往復加載試驗，得到了不同類型節(jié)點的破壞特征、荷載-位移滯回曲線、骨架曲線、剛度退化曲線及延性等性能。試驗結果表明：采用鋼接頭連接的節(jié)點的抗震性能都較好，節(jié)點具有很好的延性（平均位移延性系數(shù)為3-08）；節(jié)點區(qū)域基本完好，破壞發(fā)生在梁鋼筋區(qū)域；節(jié)點的滯回曲線呈反“S”形或“Z”形，帶樓板的節(jié)點以及梁下部配置鋼板的節(jié)點在拉、壓兩個方向的滯回曲線差別較大，承載力和剛度明顯高于其他節(jié)點，強度退化較為明顯；節(jié)點轉動時，縱向受拉鋼筋先屈服，隨后受壓邊緣混凝土被壓碎；樓板對節(jié)點內鋼筋應變的影響非常大，尤其是在正向加載時，其貢獻作用更大。
［關鍵詞］裝配式建筑； 鋼管混凝土柱； 鋼筋混凝土梁； 鋼接頭； 抗震性能； 低周往復加載試驗
中圖分類號：TU398+.7文獻標識碼：A文章編號：1002-848X(2017)10-0053-12
Experimental study on seismic behavior of nodes fabricated by concrete-filled steel tubular column and reinforced concrete beam with steel joints
Jiao Anliang1, Feng Dakuo1, Zhang Zhongshan1, Zheng Peijun1, Zhang Qing2
(1 China Construction Seventh Engineering Division Co., Ltd., Zhengzhou 450007, China;
2 College of Civil Engineering, Chongqing University, Chongqing 400044, China)
Abstract:On the basis of the research on the prefabricated structure joints at home and abroad, a new type of nodes prefabricated by concrete-filled steel tubular column and reinforced concrete beam with steel joints was put forward, and low-cyclic reversed loading experiments were conducted on six full scale joint models, to obtain failure characteristics, load-displacement hysteretic curves, skeleton curves, stiffness degradation curves and ductility of different types of joints. The experimental results show that the seismic behavior of nodes with steel joints are better, and the joints have good ductility (average displacement ductility coefficient is 3-08). The node area is basically intact, and damage occurs in the area of beam steel rebar area. Hysteretic curves of nodes show "S-shaped "or" Z-shaped" forms. The hysteresis curves of the nodes with floors and the joints arranged with steel plate at the lower part of the beam are obviously different in the two directions of the tension and compression. The bearing capacity and stiffness of these nodes are obviously higher than those of other nodes, and the strength degradation is obvious. When the nodes rotate, the compression tensile steel rebar is bent first, and then the concrete at compression edge is crushed. The effect of the floor on the steel bar strain inside the node is very large, and its contribution is greater especially when it is under the positive loading.
Keywords:prefabricated building; concrete-filled steel tubular column; reinforced concrete beam; steel joint; seismic performance; low-cyclic reversed loading experiment
*國家重點研發(fā)計劃課題（2016YFC0701705）。
作者簡介：焦安亮，博士，教授級高級工程師，Email:jiaoal@cscec.com。
