截面尺寸对玻璃纤维包裹加固砖柱效果的影响

Effect of sectional size on the bearing capacity of brick masonry columns wrapped with glass fibre reinforced plastic (GFRP)

为研究截面尺寸对玻璃纤维加固砖柱轴压性能的影响,进行了39个(13组)不同截面尺寸的砖砌体柱经玻璃纤维增强材料全长包裹加固后的轴心受压试验,分析了试件截面尺寸、砂浆强度以及黏贴层数等因素对加固后试件极限强度的影响。试验结果表明:这种加固方式能不同程度提高砖柱的极限承载力,极限强度随加固层数线性变化。参照FRP加固混凝土柱的基本原理,建立了FRP加固砖柱的有效约束区与非有效约束区。

To investigate the effect of sectional size on axial compression performance of brick masonry columns wrapped by glass fiber reinforced plastic,34（13 groups） brick masonry columns wholy wrapped by glass fiber reinforced plastic（GFRP） sheets were tested under axial compression.The influences of specimen sectional size,mortar strength and stick layers of GFRP sheetsets on the ultimate strength of reinforced brick masonry columns were analysed.The experimental results indicate that GFRP sheets can obviously enhance the ultimate axial compression strength of brick columns with the ultimate strength of the reinforced testing column increasing linearly with stick layers.Based on the principle of FRP reinforced concrete square columns,a calculation method of effective controlling area of brick masonry square columns reinforced with GFRP was presented.