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混凝土HJC、RHT本构模型的失效强度参数

DOI: 10.11858/gywlxb.2011.01.003, PP. 15-22

Keywords: 混凝土,HJC,RHT本构模型,失效强度参数

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Abstract:

通过对LS-DYNA、AUTODYN数值软件中混凝土HJC、RHT本构模型失效强度参数的分析计算,发现原始失效强度参数在较高静水压下将导致混凝土失效强度降低。提出了利用混凝土的特征强度确定HJC、RHT失效强度参数的方法,并通过计算得出了校验后的失效强度参数值。最后,使用校验前后的失效强度参数进行了混凝土侵彻实验的数值模拟。计算结果表明:使用校验后参数的数值模拟结果与实验结果更为吻合。由于HJC本构模型中没有引入偏应力张量第三不变量,所以结果不够满意。

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