钢筋混凝土界面脱粘的有限元计算

Finite Element Calculation on Interfacial Debonding of Reinforced Concrete

在不同加载方式下,通过ADINA中Parasolid和Native组合建模方法,建立了钢筋混凝土界面脱粘研究的三维有限元模型。通过模型参数选择,实现了对锚固深度、保护层厚度等因素的综合考虑。依据计算结果,探讨了锚固深度、保护层厚度、加载方式、钢筋和混凝土摩擦等对钢筋混凝土界面脱粘的影响。并通过进一步分析,提出了混凝土保护层厚度与钢筋直径比、钢筋锚固长度与直径比等的最优值,并针对荷载作用方式和加载频率,提出了工程防护建议。

The 3-D finite element model under different loading condition is established by using the combined method of Parasolid and Native of ADINA. Anchor depth, cover thickness and so on are considered synthetically by selecting different model parameters. According to the calculated results, the effects of anchor depth, cover thickness, loading mode and friction on interfacial debonding are discussed. Furthermore, the optimum values of cover thickness of concrete, diameter ratio of reinforcing steel bar, the ratio of anchor depth and diameter are proposed. Based on the mode and the rate of load, some suggestions on project protection are put forward.