CFRP-鋼管混凝土軸壓短柱的力學(xué)性能
張常光 趙均海 馮紅波
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（長安大學(xué)建筑工程學(xué)院 西安 710061）［提要］ 采用雙剪統(tǒng)一強(qiáng)度理論，對CFRP-鋼管混凝土軸壓短柱進(jìn)行研究，分析了核心混凝土內(nèi)摩擦角、中間主應(yīng)力、鋼管厚徑比和CFRP粘貼層數(shù)對極限承載力的影響，提出了CFRP-鋼管混凝土軸壓短柱的極限承載力公式。并將理論計算結(jié)果與文獻(xiàn)資料的試驗結(jié)果作比較，驗證了理論公式的正確性。進(jìn)一步簡化了理論公式，在沒有外CFRP筒，且k=4，b=0時，理論公式退化為圓截面鋼管混凝土軸壓短柱承載力極限平衡法的表達(dá)式。該結(jié)果為CFRP-鋼管混凝土軸壓短柱的極限承載力分析提供了一定的理論依據(jù)，供工程設(shè)計參考。［關(guān)鍵詞］ CFRP-鋼管混凝土柱 雙剪統(tǒng)一強(qiáng)度理論 薄壁鋼管 極限承載力Mechanics Behavior of Concrete Filled CFRP-steel Tube Stub Columns Under Axial Compression/Authors:Zhang Changguang,Zhao Junhai,Feng Hongbo (School of Civil Engineering, Chang′an University, Xi′an 710061, China)Abstract:The load bearing capacities of concrete filled CFRP-steel tube stub column under axial loads are investigated. The effects of inner friction angle of the concrete, the intermediate principal stress, the ratio of the thickness and the diameter, and the layer number of the CFRP are considered in the theoretic analysis. The formula of load capacities for the column is derived based on the twin shear strength theory. Good agreement can be found between the results of the analysis and the experimental data. By assuming k=4 and b=0, the formula can be simplified for cases without CFRP.Keywords:concrete filled CFRP-steel tube column； unified twin shear strength theory; steel tube; ultimate bearing capacity*教育部博士點基金資助項目(20040710001);陜西省自然科學(xué)基金資助項目(2005E204)。
