预应力碳纤维板加固混凝土梁可靠度的研究

Study on the reliability of concrete beams strengthened with prestressed CFRP plate

目前对利用预应力碳纤维板加固后混凝土梁结构安全性的分析方法中忽视了变量变异性的影响,而变量的变异性是可靠度分析中重要的组成部分.本文在已有研究的基础上,提出了利用预应力碳纤维板加固混凝土梁的极限状态方程,通过计算软件对算例中的混凝土梁利用预应力碳纤维板加固前和加固后的可靠指标进行计算并对其进行比较分析.分析结果显示,碳纤维板随机变量的变异系数和均值对预应力碳纤维板加固混凝土梁的可靠指标的影响是明显的.

The method of safety analysis of the structure of concrete beams strengthened with prestressed CFRP plate neglects the effect of variability of variables which plays an important part in the reliability analysis. The paper uses the limit state equation of concrete beams to calculate and analyze the reliability index of concrete beams before and after strengthening. The analysis results show that the variable coefficient of random variable and mean value of the carbon fiber plate have an obvious effect on the reliability index of the concrete beams strengthened with prestressed CFRP plate.