钢筋钢丝网砂浆加固混凝土圆柱小偏心受压性能

Small Eccentric Compression Performance of Concrete Columns Strengthened by Steel Bar and Wire Mesh Mortar

为大幅度提高加固效率,提出用钢筋钢丝网砂浆加固混凝土圆柱的思路。分别用钢筋钢丝网(SW)、钢筋网(S)加固混凝土圆柱共18根,进行小偏心受压试验,探讨不同加固方法对试件承载能力和延性的影响。结果显示,钢丝网优越的配筋分散性,使钢筋钢丝网砂浆加固柱在不同小偏心距下,裂缝较多,而且可在一定时段内裂而不碎。偏心距分别为0mm、19mm和38mm时,钢筋钢丝网砂浆(SW)加固柱试件的极限承载力分别比钢筋网砂浆(S)加固柱试件高19.8%、16.8%和37.2%。

In order to improve the efficiency of reinforcement,a thought of reinforced concrete columns with ferrocement including steel bar is proposed. A total of 18 concrete columns strengthened with steel bar and wire mesh（ SW）,steel mesh（ S）,respectively,are tested under small eccentric compression,to explore different strengthened methods on the bearing capacity and ductility of the specimen. The results show that due to the good reinforcement dispersion of ferrocement,the cracks of the columns strengthened by steel bar and wire mesh mortar are more than that strengthened by steel mesh,and the cracks propagate without breaking within a certain period of time under different small eccentricity. Ccompared with that strengthened by the steel mesh mortar（ S） with the eccentricity of 0mm,19 mm and 38 mm respectively,the ultimate bearing capacities of the columns strengthened by steel bar and wire mesh mortar（ SW） are higher about 19. 8%,16. 8% and 19. 8%.