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应用材料破坏分析软件MFPA2D(Material Failure Process Analysis)系统,模拟了钢筋混凝土材料在4点弯曲状态下的破坏过程,重点研究了钢筋保护层厚度对钢筋混凝土梁力学性能的影响。研究结果表明:一味地增加保护层的厚度会使梁的截面有效高度减小,从而使构件的承载能力下降。所以要选择适当的保护层厚度,使构件能最好地发挥它的性能。通过本研究发现,一般情况下钢筋保护层厚度在90 mm以内都是比较合理的,但在此前提下仍需要根据相关标准及规范来确定。
The material failure process analysis (MFPA2D) system was used to simulate the failure process of reinforced concrete (RC) under 4-point bending conditions. The influence of reinforcement thickness on the mechanical properties of RC beams was mainly studied. The results show that simply increasing the thickness of the protective layer will reduce the effective height of the cross-section of the beam and reduce the load carrying capacity of the component. So to choose the appropriate thickness of the protective layer, so that the best components to play its performance. Through this study, we found that under normal circumstances, the protective layer thickness of reinforced bar is within 90 mm, but it still needs to be determined according to relevant standards and specifications.