- 摘 要
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（1 河北工業(yè)大學(xué)土木與交通學(xué)院， 天津 300401； 2 河北曲港高速公路開發(fā)有限公司， 保定 071000）
［摘要］為改善鋼筋混凝土結(jié)構(gòu)框架節(jié)點的抗震性能，提出在混凝土框架邊節(jié)點整體應(yīng)用高韌性混凝土、節(jié)點核心區(qū)應(yīng)用X配筋以及在核心區(qū)并向梁中部延伸1倍有效梁高范圍內(nèi)應(yīng)用高韌性混凝土3種增強措施，通過擬靜力試驗對比研究3種方法增強的框架邊節(jié)點的破壞特征、滯回曲線、剛度退化、耗能能力等抗震指標(biāo)。研究結(jié)果表明：3種措施增強下，節(jié)點的抗震性能有所提高，節(jié)點的承載力與變形性能、耗能能力均有所提高。在節(jié)點核心區(qū)應(yīng)用X配筋對于提高節(jié)點承載力、改善節(jié)點抗震性能效果顯著。
［關(guān)鍵詞］邊節(jié)點； 高韌性混凝土； X配筋； 抗震性能
中圖分類號：TU375-4文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)08-0022-05
Experimental study on seismic behavior of concrete frame exterior joints reinforced by high-toughness concrete or X-shaped reinforcement
Li Yanyan1， Li Mingyang1， Mo Ling2, Zhang Weitian1
（1 School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China; 2 Hebei Qugang Expressway Development Co., Ltd., Baoding 071000, China）
Abstract:To improve the seismic behavior of reinforced concrete frame joints, three kinds of reinforcing measures for concrete frame exterior joints were put forward, those are, the application of high-toughness concrete as a whole, the application of X-shaped reinforcement in the core area, and the application of high-toughness concrete in the core area and within the range of 1-time effective beam height extending to the middle of the beam. The seismic behavior indexes including failure characteristic, hysteretic curve, stiffness degradation, energy dissipation of the frame exterior joints reinforced by three methods were compared through quasi-static tests. The results show that the seismic behavior of the joints reinforced by three reinforced specimens is improved, and the capacity of bearing capacity, deformation and energy dissipation is increased. The application of X-shaped reinforcement in the core of the joint is more effective in improving the bearing capacity and the seismic behavior of the joints.
Keywords:exterior joints; high-toughness concrete; X-shaped reinforcement; seismic behavior
*河北省自然科學(xué)基金項目（E2018202290，E2017202278），河北省交通運輸廳科技計劃項目（QG2018-2）。
作者簡介：李艷艷，博士，教授，Email：nicole_820@163.com。
