纤维材料加固木柱的试验研究

Experimental research on timber columns strengthened with FRP sheets

通过纤维布加固木柱的轴心抗压试验,研究纤维布的种类(碳纤维、玻璃纤维)、粘贴胶体的种类、纤维布的裹贴方式、粘贴层数等参数对木柱强度的影响。分析了纤维布加固木柱的破坏特征、受力性能。试验结果表明,纤维横向约束能够提高木柱的抗压强度,纵向纤维布必须要有横向纤维布对它约束才能产生加固效果。理论分析并推导了横向、纵横向纤维布加固木柱的强度计算公式,计算结果与试验结果符合较好。

Timber columns strengthened with fiber reinforced polymers subjected to axial compression have been tested. The affects of the fiber （CFRP, GFRP）, adhesive type, paste formats and layers on the strength are studied and the failure pattern and structural behaviors of strengthened timber columns are analyzed. The results show that fiber confinement can improve the compressive strength of wooden columns, vertical fiber could produce its reniforcing effect only confined with lateral fiber. Finally the design fomula of strengthened columns is deduced and the calculation results agree with the test ones well.