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（1 天津城建大學(xué)土木工程學(xué)院， 天津 300384；2 天津市土木建筑結(jié)構(gòu)防護(hù)與加固重點(diǎn)實(shí)驗(yàn)室， 天津 300384）
［摘要］通過30根玄武巖纖維（BFRP）管膨脹混凝土短柱軸壓試驗(yàn)，研究了BFRP布層數(shù)、膨脹劑摻量對BFRP管膨脹混凝土短柱軸壓力學(xué)性能的影響。結(jié)果表明：試件脆性破壞特征明顯；摻入適量膨脹劑可提高BFRP管混凝土短柱軸壓極限承載能力，試件軸壓極限承載能力提高幅度隨膨脹劑摻量增加呈先提高后降低趨勢；對于本試驗(yàn)C40，C50兩個(gè)系列試件其最大軸壓極限承載力對應(yīng)膨脹劑摻量分別為10%和15%；膨脹劑摻量相同時(shí)，隨BFRP布層數(shù)增加，試件軸壓極限承載力有明顯提高趨勢；試件軸向、環(huán)向應(yīng)力-應(yīng)變曲線均表現(xiàn)為雙折線形。
［關(guān)鍵詞］BFRP管； 膨脹混凝土； 軸壓極限承載力
中圖分類號：TU375-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號：1002-848X(2016)15-0032-05
Experimental research on the axial compression mechanical performance of BFRP tube expansion concrete short columns
Wang Hailiang1,2， Guo Fu1， Wang Bo1
(1 School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384,China；2 Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin 300384,China）
Abstract:The axial compression tests for 30 basalt fiber reinforced polymer (BFRP) tube expansion concrete short columns were carried out to study the effects of the BFRP cloth layers and the volume of the expansive agent on mechanical properties of BFRP tube expansion concrete short columns. The results show that the specimens present brittle failure obviously; the axial compression ultimate bearing capacity of BFRP tube expansion concrete short columns can be improved by adding moderate amount of expansion agents, and the axial compression bearing capacity increases first and decreases afterwards with the rise of the amount of expansion agents; for the two groups of C40 and C50 specimens in test, the dosages of expansive agent corresponding to the max axial compression ultimate bearing capacity are 10% and 15% respectively; with the BFRP cloth layers increasing, axial compression bearing capacity of specimens has obvious increasing trend under the same dosage of expansive agent; both of the axial and ring directional stress-strain curves of specimens are double fold line form.
Keywords:BFRP tube; expansion concrete; axial compression ultimate bearing capacity
*天津市自然科學(xué)基金重點(diǎn)項(xiàng)目（12JCZDJC28900），天津市科技興海項(xiàng)目（KJXH2012-19）。
作者簡介：王海良，教授，碩士生導(dǎo)師，Email: wanghailiang6601@126.com。
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