13m空心板梁用碳纤维增强复合材料(CFRP)加固后的可靠度分析

通过考虑影响碳纤维增强复合材料(CFRP)加固板梁截面抗力的多种因素,以上海市庙泾港桥13m跨径的空心板梁为例,用蒙特卡罗模拟得出了CFRP加固截面抗力统计参数模拟结果,结果表明CFRP加固截面抗力服从正态分布。据此,计算得出13m板梁粘贴不同层数CFRP及不同钢筋面积损失情况下的可靠度指标,同时得出采用CFRP加固后,可提高结构的可靠度。

Reliability Analysis of 13 m Hollow Plate Girder Strengthened with CFRP

Many factors have been considered which affect the bearing capability of a section strengthened with CFRP. As an example, a hollow plate girder with the span of 13 m of Miaojinggang Bridge which was strengthened with CFRP has been analyzed by using Monte Carlo method. The result shows that the probability distribution of the bearing capability of a section strengthened with CFRP is submitted to normal-distribution. Hereby, the different reliability indexes of the beam can be obtained according to different layers of CFRP and different area loss of the steel bars. Then some availability conclusions have been given in this paper.