CFRP布增强仿木柱轴压性能试验研究

Experimental Study on Axial Compressive Behavior of Faux Wood Column Reinforced by CFRP Cloth

为改善轴心受压仿木柱的力学性能,在其表面粘贴碳纤维增强复合材料(carbon fiber reinforced compo-site,CFRP)予以增强。考虑CFRP粘贴层数和方式的影响,在两端简支状态下对4组仿木柱试件进行了单调轴心受压试验,以了解其受力过程及破坏形态,得到了荷载-位移曲线和荷载-应变曲线。结果表明:粘贴CFRP布可以有效约束轴心受压柱中仿木材料的横向变形;与未增强的仿木柱相比,能有效地提高仿木柱的承载能力和延性,且改善的效果随着CFRP布粘贴量的增加而更为有效;CFRP粘贴量越大,对仿木材料的约束效应越强,仿木柱试件的峰值应力和极限应变越高。

To improve the mechanical properties of faux wood column under axial compression,carbon fiber reinforced polymer(CFRP)is bonded to their surface for reinforcement.Considering the influence of the number and method of CFRP bonding layers,monotonic axial compression tests were conducted on four groups of faux wood column specimens with simply supported ends to understand their loading process and failure modes.Load-displacement curves and load-strain curves were obtained.The results show that bonding CFRP cloth can effectively constrain the lateral deformation of the faux wood material in the axially compressed columns.Compared with unreinforced faux wood column,it can effectively improve the bearing capacity and ductility of the faux wood column,and the improvement effect becomes more effective as the amount of CFRP cloth bonded increases.The greater the amount of CFRP bonded,the stronger the confining effect on the faux wood material,and the higher the peak stress and ultimate strain of the faux wood column specimens.