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Experimental Research on Calculation Parameters of GFRP Bars Tensile Strength

机译：GFRP棒拉伸强度计算参数的实验研究

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A tensile test on the 18mm diameter (Φ18) and 25mm (cp25) GFRP bars was conducted to observe the tensile apparent characteristics and failure strength. The value calculated by failure strength fomula and the experimental value were contrasted to study the parameters and value of the strength calculating formula,, and drawn the conclusions as follows: The Φ18 and Φ25 GFRP bars' failure strength is effected by fiber materials, enhance materials itself and interface performance. The Φ18 bars' failure strength is about 10% higher than Φ25 bars'. The deviation between the calculated value and the actual value is more than 30%. k is the correction parameter in theoretical formula, k_(Φ18) = 0.76, k_(Φ25) = 0.68 is appropriate. Based on statistical intensity distribution model of GFRP bars' failure strength, reference stresses value of the Φ18 and Φ25 GFRP bars are different and the diameters of GFRP bars increases to weaken the strength of the composite material. The reducing rate of the reference stresses is significantly affected by the diameters. The diameters effect is greater than the fiber content effect.
机译：进行了18mm直径（φ18）和25mm（CP25）GFRP棒的拉伸试验以观察拉伸表观特性和失效强度。通过失效强度罪和实验值计算的值与研究强度计算公式的参数和值进行了鲜明对比，如下所示：φ18和φ25GFRP棒的故障强度由纤维材料进行，增强材料本身和界面性能。 φ18棒的故障强度高于φ25棒的10％。计算值与实际值之间的偏差超过30％。 K是理论公式的校正参数，K_（φ18）= 0.76，k_（φ25）= 0.68是合适的。基于GFRP棒的故障强度的统计强度分布模型，φ18和φ25GFRP棒的参考应力值不同，GFRP棒的直径增加以削弱复合材料的强度。参考应力的降低速率受到直径的显着影响。直径效应大于纤维含量效应。

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