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（湖南大學(xué)土木工程學(xué)院， 長(zhǎng)沙 410082）

［摘要］研究了活性粉末混凝土（RPC）加固法加固鋼筋混凝土柱的軸壓性能及影響因素。對(duì)5根鋼筋混凝土柱進(jìn)行了一次受力軸心受壓試驗(yàn)，將其中4根加固柱試驗(yàn)結(jié)果與另外1根未加固柱試驗(yàn)結(jié)果進(jìn)行對(duì)比。結(jié)果表明，RPC加固法是一種有效的加固方法，能夠顯著提高加固柱的極限承載力、峰值應(yīng)變、開(kāi)裂荷載、延性、剛度及抗裂性能，有效地改善加固柱的裂縫分布形態(tài)及破壞模式。RPC加固法可以大幅度提高構(gòu)件的極限承載力和延性，約束裂縫的發(fā)展。最后，給出了加固柱受壓極限承載力計(jì)算公式，該公式所得計(jì)算值與試驗(yàn)結(jié)果吻合較好。

［關(guān)鍵詞］活性粉末混凝土; 加固; 一次受力; 承載力; 鋼筋混凝土柱

中圖分類號(hào)：TU375.3      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)11-0008-06

Experimental study on axial compression performance of RPC reinforced concrete columns

Bu Liangtao, Tao Jianjian, Duan Wenfeng, Liu Yibin

 (College of Civil Engineering, Hunan University, Changsha 410082, China)

Abstract: The axial compression performance and influencing factors of RC columns reinforced by reactive powder concrete (RPC) were studied. Through axial compression test of five columns subjected to one-off loading, the results of four reinforced columns were compared with that of one RC column without reinforcement. Test results show that RPC reinforcing method is effective  which can enormously increase ultimate bearing capacity, peak strain, cracking load, ductility, stiffness and anti-cracking ability of reinforced columns. Meanwhile, this method can also effectively improve the distribution patterns of cracks and failure modes of reinforced columns. RPC reinforcing method can greatly raise the ultimate bearing capacity and ductility of members and restrain the development of cracks. Finally, the formula for calculating the ultimate bearing capacity of reinforced columns was given, the calculated values by the formula correspond well with test results.

Keywords: reactive powder concrete; reinforcement; one-off loading; ultimate bearing capacity; RC column

*國(guó)家自然科學(xué)基金項(xiàng)目（51278187）,長(zhǎng)沙市科技局重點(diǎn)項(xiàng)目（K1109115-11）。

作者簡(jiǎn)介：卜良桃，教授，Email:plt63@126.com。

參考文獻(xiàn)

［1］卜良桃,羅興華.鋼纖維水泥砂漿與老混凝土雙面剪切粘結(jié)性能研究［J］.工業(yè)建筑,2009,39(9):90-94.

［2］尚守平,蔣隆敏,張毛心.鋼筋網(wǎng)水泥復(fù)合砂漿加固RC偏心受壓柱的試驗(yàn)研究［J］.建筑結(jié)構(gòu)學(xué)報(bào),2005,26(2):18-25.

［3］程紅強(qiáng).纖維混凝土與老混凝土粘結(jié)性能試驗(yàn)研究［D］.鄭州:鄭州大學(xué),2007:20-21.

［4］CECS 242∶2008水泥復(fù)合砂漿鋼筋網(wǎng)加固混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］.北京:中國(guó)計(jì)劃出版社,2008.

［5］李易越.聚乙烯醇纖維水泥砂漿鋼筋網(wǎng)加固RC方柱軸壓性能試驗(yàn)［D］.長(zhǎng)沙:湖南大學(xué),2011.

［6］卜良桃,毛海斌.鋼纖維水泥砂漿鋼筋網(wǎng)加固RC方柱試驗(yàn)研究［J］. 沈陽(yáng)建筑大學(xué)學(xué)報(bào):自然科學(xué)版,2011,27(3):430-435.

［7］SHEIKH S A, UZUMERI S M. Strength and ductility of tied concrete columns［J］. Journal of Structural Division, ASCE, 1980, 106 (5): 1079-1102.

［8］許寧.鋼筋網(wǎng)水泥復(fù)合砂漿加固混凝土軸心受壓構(gòu)件性能研究［D］.長(zhǎng)沙:湖南大學(xué),2006.

［9］MANDER J B, PRIESTLEY M J N, PARK R. Theoretical stress-strain model for confined concrete［J］. Journal of Structural Engineering, 1988, 114 (8): 1804-1826.