基于三参数Weibull分布的GFRP筋材抗拉强度确定方法

发布时间：2018-07-11 12:26

本文选题：GFRP筋 + 抗拉强度　；参考：《武汉理工大学学报》2015年09期

【摘要】：进行了一百多根包括5种不同直径8 mm、10 mm、12 mm、16 mm、20 mm的GFRP筋的拉伸试验,测得了GFRP筋的极限抗拉强度和弹性模量等参数并做了回归分析。以试验结果数据为基础,提出了三参数Weibull概率分布模型,完成了模型参数拟合,将试验结果数据、Weibull分布模型和正态分布模型进行了比较,表明GFRP筋抗拉强度分布特性用Weibull分布描述比用正态分布描述会更为精确。最后,讨论了GFRP筋抗拉强度与有效体积之间的关系,得出不同直径GFRP筋抗拉强度标准值计算公式,为GFRP筋抗拉强度标准值的选取提供理论依据。
[Abstract]:The tensile tests of more than 100 GFRP tendons, including five kinds of GFRP tendons with different diameters of 8 mm 10 mm / 12 mm and 16 mm / 20 mm, were carried out. The ultimate tensile strength and elastic modulus of GFRP tendons were measured and the regression analysis was made. Based on the experimental data, a three-parameter Weibull probability distribution model is proposed, and the model parameter fitting is completed. The Weibull distribution model and the normal distribution model are compared. It is shown that the distribution of tensile strength of GFRP bars is more accurate to be described by Weibull distribution than by normal distribution. Finally, the relationship between the tensile strength and the effective volume of GFRP bars is discussed, and the formula for calculating the tensile strength standard values of GFRP tendons with different diameters is obtained, which provides a theoretical basis for the selection of the tensile strength standard values of GFRP tendons.
【作者单位】：武汉理工大学道路桥梁与结构工程湖北省重点实验室;
【基金】：国家自然科学基金(51178368;51478372)
【分类号】：TU59

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