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通过对碳纤维增强复合材料(CFRP)板加固受弯钢梁进行受力分析,推导了二次受力下CFRP板加固钢梁抗弯承载力计算公式。为验证该计算公式的正确性,进行了4根CFRP板加固H型钢梁的静力试验,并设置一根未加固钢梁作为对比梁,然后用有限元分析软件ANSYS进行模拟分析,并将理论计算结果、试验结果及有限元分析结果进行对比。结果表明,CFRP板加固钢梁的抗弯承载力随初始应力的增大而减小,所推导的抗弯承载力公式的理论计算结果与试验结果及有限元分析结果较为吻合,表明该计算公式具有较高精度。
Through the force analysis of the CFRP plate reinforced bent steel beam, the calculation formula of the flexural capacity of the CFRP plate reinforced steel beam under the second force is deduced. In order to verify the correctness of the calculation formula, four CFRP plate reinforced H-beam static test, and set an unrestrained steel beam as the contrast beam, and then use the finite element analysis software ANSYS simulation analysis, and Theoretical calculation results, test results and finite element analysis results were compared. The results show that the flexural capacity of steel beams strengthened with CFRP plate decreases with the increase of initial stress, and the theoretical calculation results of the formula of flexural capacity agree well with the experimental results and finite element analysis. It shows that the formula With higher accuracy.