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通过现场拉拔破坏性试验,测得不同直径的GFRP抗浮锚杆在基础底板内的极限承载力和滑移量,并与实际工程中不同形式的钢筋抗浮锚杆作比较,分析其承载性能和粘结特性。研究表明,在相同的混凝土强度与养护条件下,相同直径的GFRP抗浮锚杆的极限承载力、平均粘结强度与钢筋抗浮锚杆相比较高,且GFRP抗浮锚杆的变形能够满足实际工程需求,充分验证了GFRP材料用作抗浮锚杆的先进性与合理性。基于试验结果与理论分析,给出了GFRP抗浮锚杆与基础底板的最佳锚固面积,并提出了计算公式。
Through the field destructive test, the ultimate bearing capacity and slippage of GFRP anti-floating anchor bars with different diameters in the foundation are measured and compared with the different forms of anti-floating anchor bars in actual engineering, Performance and bonding properties. The results show that under the same concrete strength and curing conditions, the ultimate bearing capacity and the average bond strength of GFRP anti-floating anchor rods with the same diameter are higher than those of the anti-floating anchor rod, and the deformation of GFRP anti- The actual engineering requirements, fully validated GFRP material used as anti-floating anchor advanced and reasonable. Based on the test results and theoretical analysis, the optimal anchorage area of GFRP anti-floating anchor rod and foundation slab is given and the calculation formula is put forward.