摘要
基于修正的Rabotnov损伤理论,建立了适合于依托工程岩体的非线性蠕变损伤本构模型,利用白云质灰岩室内三轴蠕变试验结果对本构方程进行了参数识别;将该模型编入到ABAQUS子程序进行二次开发,对变质灰岩室内三轴蠕变试验过程进行三维数值仿真,数值计算得到的流变时程曲线与试验曲线较为一致。将文章第Ⅰ部分实现的地下工程"智能连续"优化方法应用于四川大渡河猴子岩水电站地下厂房合理空间分布优化中,建立考虑围岩体流变特性、地下厂房分步开挖及其支护体系的参数化模型,通过优化分析得到适合于工程建设的最优空间分布施工方案,并将优化方案与设计方案计算结果进行对比,验证了优化方案的合理性。
Based on the modified Rabotnov damage theory, a nonlinear creep damage constitutive model of rock mass has been established for a supported project. The parameters of the constitutive model were iden-tified by means of the laboratory triaxial creep test result of dolomitic limestone. Meanwhile, the nonlinear creep damage model was programmed into the subroutine of ABAQUS to make secondary development, by which the laboratory triaxial creep test process of metamorphic limerock was simulated. The creep time-histo-ry curve obtained by the numerical simulation is consistent with the test curve well. Then, the intelligent and continuous optimization method of underground engineering which had been realized in part I of this pa-per series was applied to the reasonable spatial distribution optimization for underground powerhouse of Houziyan hydropower station in the Dadu River of Sichuan Province. A parametric model has been estab-lished, which considers the creep property of surrounding rock, stepped excavation of underground power-house and the supporting system. Through optimization analysis, it is obtained the best space distribution scheme suitable for engineering construction. Comparison of the calculation results between optimization scheme and designed one,the rationality of the optimization scheme has been verified.
出处
《水利学报》
EI
CSCD
北大核心
2014年第2期187-196,共10页
Journal of Hydraulic Engineering
基金
山东科技大学人才引进科研启动基金项目资助
山东科技大学泰安校区科研创新团队支持计划
国家自然科学基金(51279096
41102193
41372289)
岩土力学与工程国家重点实验室资助课题
关键词
地下工程
优化分析
蠕变
underground engineering
optimization analysis
creep
