圓鋼管鋼筋混凝土軸壓短柱試驗與承載力計算*
張玉琢1，呂學濤2，劉海卿2
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（1 遼寧工程技術大學土木與交通學院， 阜新 123000； 2 遼寧工程技術大學建筑工程學院， 阜新 123000）
［摘要］為研究圓鋼管鋼筋混凝土軸壓短柱承載力計算方法，以配筋率為變化參數(shù)進行了6個圓鋼管鋼筋混凝土短柱的軸壓試驗。結果表明，圓鋼管鋼筋混凝土軸壓短柱在峰值荷載之前的荷載-位移曲線呈線性變化，試件的破壞形態(tài)呈剪切破壞，由于配筋對混凝土的進一步約束，試件具有較高的承載力和很好的延性。通過試驗數(shù)據(jù)對比，進一步驗證了采用疊加法計算圓鋼管鋼筋混凝土軸壓短柱承載力的計算方法是可行的，《實心與空心鋼管混凝土結構技術規(guī)程》（CECS 254∶2012）和《鋼管混凝土結構技術規(guī)程》（CECS 28∶2012）的計算結果和試驗結果吻合較好。［關鍵詞］鋼管鋼筋混凝土; 短柱; 軸壓試驗; 極限承載力; 計算方法中圖分類號：TU352.5 文獻標識碼：A 文章編號：1002-848X(2016)07-0064-04
Axial compression test and bearing capacity calculation of bar-reinforced concrete filled circular steel tubular stub columnZhang Yuzhuo1, Lü Xuetao2, Liu Haiqing2(1 College of Civil Engineering and Transportation, Liaoning Technical University, Fuxin 123000, China; 2 College of Engineering and Architecture， Liaoning Technical University, Fuxin 123000, China)Abstract: To study the calculation method of bearing capacity of bar-reinforced concrete filled circular steel tubular stub column, 6 specimens were designed for the axial compression test considering the variable parameters of reinforced ratio. Test results indicate that load-displacement curve is in linear change and the damage form of specimens is shear failure before the load is reaching the ultimate bearing capacity. Due to the further constraints of the reinforcement to concrete, the specimens have good ultimate bearing capacity and ductility. Comparison with experimental data further verifies that it is feasible to use superposition method for calculating the bearing capacity of bar-reinforced concrete filled circular steel tubular stub column under axial compression loads. The results calculated by Technical specification for solid and hollow concrete filled steel tubular structure (CECS 254∶2012) and Technical specification for concrete-filled steel tubular structures(CECS 28∶2012) are in good agreement with the test results.Keywords: bar-reinforced concrete filled steel tubular（RCFST）; stub column; axial compression test; ultimate bearing capacity; calculation method
*國家自然科學基金資助項目(51208246)，遼寧工程技術大學拔尖人才提升計劃資助項目(20130309，SCDY2013009)。作者簡介：張玉琢，博士研究生，Email：lxtwww30@sina.com。
