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对利用碳纤维增强复合材料(CFRP)布加固的轴心受压足尺圆钢管长柱进行了静力试验,分析不同的CFRP布粘贴层数和粘贴方向对钢柱极限承载力提高的贡献,并通过ANSYS有限元软件对各试件的极限承载力进行数值模拟。参照英国建筑工业研究与情报协会(CIRIA)出版的《外粘纤维增强材料加固的金属结构》,对不同CFRP粘贴层数和粘贴方向钢柱试件的试验值、ANSYS模拟值与《外粘纤维增强材料加固的金属结构》中相关算式计算出的理论值进行对比分析,提出了加固后圆管柱的稳定承载力修正系数βc。综合考虑各类研究结果,给出βc的值,即:利用CFRP布纵向加固时βc=1.03,先纵向后环向加固时βc=0.93。
The static test of full-length long-axis CFRP-reinforced long columns reinforced with carbon fiber reinforced composite (CFRP) cloth was carried out to analyze the contribution of different CFRP cloth adhesive layers and bonding directions to the increase of ultimate bearing capacity of steel columns The ultimate bearing capacity of each specimen was numerically simulated by ANSYS finite element software. According to the “Metal Structure Reinforced by Externally Viscous Fiber Reinforced Plastics” published by CIRIA, the experimental values of different CFRP layers and bonded steel columns were compared. The ANSYS simulation results were compared with the “ Reinforced metal structure ”in the calculation of the calculated value of the theory to conduct a comparative analysis, put forward the stability of the column after the reinforcement capacity correction coefficient βc. Considering all kinds of research results, the value of βc is given, ie βc = 1.03 when longitudinally reinforced with CFRP fabric, and βc = 0.93 when longitudinally and circumferentially reinforced.