TY -的A2 -阴,志强AU -史,旭扬盟——周,魏盟——陈,梁AU - Cai,清香AU -李,明非盟-李,兆麟盟——烹调的菜肴,波宇PY - 2020 DA - 2020/09/30 TI -一个新的循环开放统一解决方案考虑不同强度标准和Postpeak弹性应变形式SP - 8872201六世- 2020 AB -强度准则是一个极为重要的基础评价围岩的稳定性和优化支持压力设计。本文总结了九种不同强度的标准基于合理的假设和简化。然后,建立一个新的统一标准方程,本文提出的包括所有的强度理论。与此同时,一个新的统一的封闭循环开放解决方案基于新提出的统一判据方程推导出无限和有限的外部边界结合在平面应变条件下非联合型流动法则。在塑性区,四个不同的弹性应变假设应用于解决塑性区变形考虑岩体损伤的影响。解决方案的有效性也验证了比较与传统的解决方案。最后,的影响强度标准,膨胀系数,弹性应变形式的塑性区,和岩体损伤对围岩的力学响应进行了较为详细的试验研究。研究结果表明,TR和VM标准给最大的塑性区半径,其次是国内流离失所者,MC, MDP标准,似乎低估了岩体的自强;CDP标准给出了最小塑性区半径和可能高估岩体的自强;UST0.5, GSMP、GMC和GLD标准,合理考虑内部主要强调给一个中间的影响范围,可以强烈推荐评价围岩的力学和变形行为; as the dilation coefficient gradually increases, the dimensionless surface displacement presents the nonlinear increase characteristics; the deformation of plastic zone and the ground response curve, which are closely related to the strength criteria, are also greatly influenced by the elastic strain assumption in the plastic zone and rock mass damage degree. The assumption that the elastic strain satisfies Hook’s law (Case 3) may be more reasonable compared with the continuous elastic strain (Case 1) and thick-walled cylinders (Case 2) assumptions; in addition, the Young’s modulus power function damage model seems to give more reasonable solution for the deformation of plastic zone and is suggested to be a preferred method for solving plastic displacement. The research results can provide very important theoretical bases for evaluating the tunnel stability and support design reliability of different lithology rock masses in underground engineering. SN - 1687-8086 UR - https://doi.org/10.1155/2020/8872201 DO - 10.1155/2020/8872201 JF - Advances in Civil Engineering PB - Hindawi KW - ER -