缠绕方式对BFRP-PVC管自密实再生混凝土短柱轴心受压性能影响试验研究

Experimental Research on Influence of Wrapping Mode on Axial Compression Properties of BFRP-PVC Tubes Self-compacting Recycled Concrete Short Column

对30根BFRP-PVC管自密实再生混凝土短柱以及4根PVC管自密实再生混凝土短柱进行轴心抗压强度测定,研究了不同BFRP纤维条带宽度、BFRP纤维条带环箍间距、BFRP纤维条带面积缠绕率以及PVC管直径对短柱轴心受压性能的影响。试验结果表明,在BFRP条带环箍间距的减小、同面积缠绕率条件下,减小BFRP纤维条带宽度能显著提高自密实再生混凝土短柱的极限抗压强度和延性,试件破坏过程中表现出一定的脆性。

The experimental study on the compressive strength of SCRC short-columns filled with 30 BFRP-PVC tubes and 4 PVC tubes under axial compression is carried out,and the effects of compressive strength under the design parameters which conclude the width, hoop spacing of BFRP strips, wrapping area ratio and the tubes diameter are researched. The experimental results indicate that the compressive strength and ductility of concrete are improved greatly when the hoop spacing of BFRP strips or the width of BFRP strips in same wrapping area ratio decrease, and expresses certain fragility which has an obvious omen in the destruction.