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采用配筋环氧砂浆板等强度置换木梁受损伤区域来修复旧木梁,以提高和改善其承载力与延性。采用有限元方法对GFRP筋修复木梁的抗弯性能进行分析模拟,并将荷载-挠度计算曲线与相关试验进行对比,计算结果与试验吻合较好。基于有限元模型的正确性,进行了计算参数分析,讨论了木材强度、截面配筋率与配筋形式等主要参数对构件荷载-挠度曲线的影响。根据平截面假定,采用极限强度法建立了相应的承载力计算公式,并与相关试验结果进行对比,计算结果与试验结果吻合较好。
The use of reinforced epoxy mortar boards and other strength replacement of the damaged area of the beam to repair the old wooden beams to improve and improve its bearing capacity and ductility. The flexural behavior of GFRP tendons repaired by beam was analyzed by finite element method, and the curves of load-deflection were compared with those of the related tests. The calculated results agree well with the experimental results. Based on the correctness of the finite element model, the calculation parameters were analyzed and the influence of the main parameters such as timber strength, cross-section reinforcement ratio and reinforcement form on the load-deflection curve was discussed. According to the assumption of flat section, the corresponding formula of bearing capacity is established by the ultimate strength method, and compared with the related test results. The calculated results are in good agreement with the experimental results.