梁貫通式鋼管混凝土柱-梁邊節(jié)點擬靜力試驗后軸壓試驗研究*
陳映瑞1，薛華2，陳慶軍2，3，黃培州2
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（1 北京市建筑設計研究院有限公司廣州分公司，廣州 510623； 2 華南理工大學土木與交通學院，廣州 510641； 3 亞熱帶建筑科學國家重點試驗室， 廣州 510641)
［摘要］對4個已完成擬靜力試驗的梁貫通式鋼管混凝土柱-梁邊節(jié)點試件進行了軸壓試驗，從破壞形態(tài)、荷載位移曲線、環(huán)筋應變等方面進行了研究，并將試驗峰值荷載與規(guī)范公式計算值進行對比分析。結(jié)果表明，該節(jié)點的環(huán)梁在反復荷載下雖然產(chǎn)生了一定的損傷，但對節(jié)點區(qū)的峰值荷載影響不大，并表現(xiàn)出較好的延性。試件的柱插筋及環(huán)梁鋼筋強度均能得到充分發(fā)揮，環(huán)梁對節(jié)點核心區(qū)仍能發(fā)揮約束和加強作用。合理的設計可使得節(jié)點的軸壓承載力大于鋼管混凝土柱的軸壓承載力，保證破壞不發(fā)生在節(jié)點區(qū)，確保了節(jié)點區(qū)傳遞豎向荷載的可靠性。［關鍵詞］鋼管混凝土柱-梁邊節(jié)點; 不貫通鋼管; 軸壓; 擬靜力試驗中圖分類號：TU398 文獻標識碼：A 文章編號：1002-848X(2016)09-0063-06
Axial compression experiment study on exterior through-beam joints between concrete filled steel tubular column and RC beam after quasi-static testChen Yingrui1, Xue Hua2, Chen Qingjun2,3, Huang Peizhou2(1 Beijing Institute of Architectural Design Guangzhou Branch, Guangzhou 510623, China; 2 School of Civil and Transportation Engineering, South China University of Technology, Guangzhou 510641, China; 3 State Key Laboratory of Subtropical Building Science, Guangzhou 510641, China)Abstract: The axial compression experiments were carried out on four exterior through-beam joints between concrete filled steel tubular column and beam after the quasi-static test. The aspects of failure mode, load-axial displacement curves of the specimens, strain of ring reinforcement were studied, and the peak load in experiment was compared with the value calculated by conventional formulas. The results show that although the quasi-static test causes some damages on the ring beam, but they had few effects on the peak load, and specimens show good ductility. The strength of reinforcement in column and ring beam is fully developed，the ring beam can still confine and strengthen the joint zone. With reasonable design, the axial bearing capacity of the joint zone is higher than the concrete filled steel tubular column, damage does not occur in the joint, and the transfer of vertical load in joint is reliable.Keywords: concrete filled steel tubular column and RC beam exterior joint; discontinuous steel tube; axial compression; quasi-static test
*華南理工大學亞熱帶建筑科學國家重點實驗室自主研究課題項目(2015ZC18)，華南理工大學中央高?；究蒲袠I(yè)務費專項資金資助（2014ZZ0026）。通訊作者： 陳慶軍，博士，副教授，Email: qjchen@scut.edu.cn。
