预应力钢带加固钢筋混凝土梁柱受力性能试验研究

Experimental study on mechanical properties of reinforced concrete beams and columns confined by prestressing steel strip

将打包技术应用于结构工程加固领域。进行了6个加固梁试件和1个对比试件的受剪性能试验,分析钢带间距、钢带层数及倒角对承载力及变形性能的影响。结果表明:经预应力钢带加固的试件,在加载过程中,裂缝开展缓慢且发育充分,与未加固试件相比其受剪承载力提高约46%～95%,加固后梁的变形能力大幅提高。通过对3个加固柱试件和1个对比试件的低周反复荷载试验,分析了钢带间距及轴压比对柱水平承载力及变形能力的影响,结果表明,经预应力钢带加固后的柱试件其延性提高约32%～121%,水平承载力提高不明显。

Packaging technology is applied to reinforcement field of structural engineering. Six reinforced beam specimens and one contrast specimen were tested on shear resistance considering the spacing of steel strip, layer numbers of steel strip and chamfering of specimen. The test results show that the shear resistant of beams reinforced by prestressing steel strip can be improved about 46% -95% , while deformation capacity can be greatly improved. While three reinforced column specimens and one contrast specimen were tested under low cyclic loading considering the spacing of steel strip and axial compression ratio. The test results show that the ductility of specimens reinforced by prestressing steel strip can be improved about 32% - 121%, while the bearing capacity doesn＇ t increase obviously.