矩形截面木梁和碳纤维布加固木梁的受弯性能研究

Study on the flexure behavior of rectangular section timber beams and that strengthened with CFRP sheets

在分析木材材性试验和木梁弯曲试验结果的基础上,提出了考虑弹塑性变形的矩形截面木梁和碳纤维布加固木梁抗弯承载力的计算方法。该方法提供一个判断破坏模式的指标和相应于不同破坏模式的弯曲承载力计算公式,计算结果与试验结果吻合良好。还提供了加固木梁弯曲刚度提高倍数的经验公式。

On the basis of analysing the test results of timber mechanic property and timber beam flexure behavior, a calculation method of bending bearing capacity for rectangular section timber beams strengthened or not, considering the elasto-plastic deformation, is presented. The method provides an index for determining the failure model of beam cross section and the calculation formulae of bending bearing capacity for different failure models. The calculation results agree with the test results well. An experience formula for calculating bending stiffness increasing coefficient of strengthened timber beams is also proposed.