（湖南大学土木工程学院， 长沙 410082）

［摘要］研究了活性粉末混凝土（RPC）加固法加固钢筋混凝土柱的轴压性能及影响因素。对5根钢筋混凝土柱进行了一次受力轴心受压试验，将其中4根加固柱试验结果与另外1根未加固柱试验结果进行对比。结果表明，RPC加固法是一种有效的加固方法，能够显著提高加固柱的极限承载力、峰值应变、开裂荷载、延性、刚度及抗裂性能，有效地改善加固柱的裂缝分布形态及破坏模式。RPC加固法可以大幅度提高构件的极限承载力和延性，约束裂缝的发展。最后，给出了加固柱受压极限承载力计算公式，该公式所得计算值与试验结果吻合较好。

［关键词］活性粉末混凝土; 加固; 一次受力; 承载力; 钢筋混凝土柱

中图分类号：TU375.3      文献标识码：A      文章编号：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

*国家自然科学基金项目（51278187）,长沙市科技局重点项目（K1109115-11）。

作者简介：卜良桃，教授，Email:plt63@126.com。

参考文献

［1］卜良桃,罗兴华.钢纤维水泥砂浆与老混凝土双面剪切粘结性能研究［J］.工业建筑,2009,39(9):90-94.

［2］尚守平,蒋隆敏,张毛心.钢筋网水泥复合砂浆加固RC偏心受压柱的试验研究［J］.建筑结构学报,2005,26(2):18-25.

［3］程红强.纤维混凝土与老混凝土粘结性能试验研究［D］.郑州:郑州大学,2007:20-21.

［4］CECS 242∶2008水泥复合砂浆钢筋网加固混凝土结构技术规程［S］.北京:中国计划出版社,2008.

［5］李易越.聚乙烯醇纤维水泥砂浆钢筋网加固RC方柱轴压性能试验［D］.长沙:湖南大学,2011.

［6］卜良桃,毛海斌.钢纤维水泥砂浆钢筋网加固RC方柱试验研究［J］. 沈阳建筑大学学报:自然科学版,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］许宁.钢筋网水泥复合砂浆加固混凝土轴心受压构件性能研究［D］.长沙:湖南大学,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.