基于FLAC3D混凝土本构模型二次开发及边坡加固工程应用
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摘要
为了更好地模拟加固工程中置换洞的作用效果,本文基于FLAC3D软件的二次开发技术,推导HTC四参数本构模型的弹塑性矩阵表达公式,开发其软件计算模型,并结合边坡加固工程实例,建立其潜在滑体三维有限元模型,分别采用二次开发的HTC模型及软件自带DP模型,对边坡加固中的混凝土置换洞进行弹塑性破坏分析,通过监测点位移变化规律及塑性破坏区域扩展规律确定边坡加固后安全系数。研究发现,基于FLAC3D软件二次开发的HTC模型可成功应用于边坡加固分析的工程实例中,并且HTC模型在分析混凝土破坏方面比原有DP模型精确度要高一些,为置换洞加固的数值模拟研究提供参考依据。
In order to better simulate the effect of the replacement hole in the reinforcement project, on the basis of secondary development technology of FLAC3 D software, the expression formula of elastoplastic matrix of HTC four-parameter constitutive model was derived, and its software calculation model was developed. The three-dimensional finite element model of the potential slide was established by combining with the example of the slope reinforcement engineering. The secondary HTC model and the software DP model were respectively used to analyze the elastic and plastic failure of the concrete replacement hole in the slope reinforcement. The safety factor of the slope was determined by the variation of the displacement and the expansion law of the plastic failure region. It was found that the HTC model based on the secondary development of FLAC3D software could be successfully applied to the engineering example of the slope reinforcement analysis, and the HTC model was more accurate than the original DP model in the analysis of concrete damage, which could provide a reference basis for the numerical simulation study of the replacement hole reinforcement.
In order to better simulate the effect of the replacement hole in the reinforcement project, on the basis of secondary development technology of FLAC3 D software, the expression formula of elastoplastic matrix of HTC four-parameter constitutive model was derived, and its software calculation model was developed. The three-dimensional finite element model of the potential slide was established by combining with the example of the slope reinforcement engineering. The secondary HTC model and the software DP model were respectively used to analyze the elastic and plastic failure of the concrete replacement hole in the slope reinforcement. The safety factor of the slope was determined by the variation of the displacement and the expansion law of the plastic failure region. It was found that the HTC model based on the secondary development of FLAC3D software could be successfully applied to the engineering example of the slope reinforcement analysis, and the HTC model was more accurate than the original DP model in the analysis of concrete damage, which could provide a reference basis for the numerical simulation study of the replacement hole reinforcement.
引文
[1]戴妙林,鞠智敏.岩质边坡混凝土置换洞变形特点及加固效果分析[J].水电能源科学.2012,30(7):123-126.
[2]余志武,吴玲玉,单智.混凝土确定性及随机性损伤本构模型研究进展[J].工程力学.2017,34(9):1-12.
[3]林皋,刘军,胡志强.混凝土损伤类本构关系研究现状与进展[J].大连理工大学学报.2010,50(6):1055-1064.
[4]李杰,吴建营.混凝土弹塑性损伤本构模型研究I:基本公式[J].土木工程学报,2005,38(9):14-20.
[5]赵尚毅,郑颖人,邓卫东.用有限元强度折减法进行节理岩质边坡稳定分析[J].岩石力学与工程学报.2003,22(2):254-260.
[2]余志武,吴玲玉,单智.混凝土确定性及随机性损伤本构模型研究进展[J].工程力学.2017,34(9):1-12.
[3]林皋,刘军,胡志强.混凝土损伤类本构关系研究现状与进展[J].大连理工大学学报.2010,50(6):1055-1064.
[4]李杰,吴建营.混凝土弹塑性损伤本构模型研究I:基本公式[J].土木工程学报,2005,38(9):14-20.
[5]赵尚毅,郑颖人,邓卫东.用有限元强度折减法进行节理岩质边坡稳定分析[J].岩石力学与工程学报.2003,22(2):254-260.