VISCO-ELASTO-PLASTIC CONSTITUTIVE MODEL FOR ROCKFILL CONSIDERING PARTICLE CRUSHING
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摘要: 通过对等向压缩条件下加载速率对堆石料应力-应变特性的影响规律的分析,提出与时间相关的应力-应变关系式。结合堆石料颗粒破碎的研究成果,将与时间相关的本构关系由等向压缩推广到剪切,从而建立能够考虑颗粒破碎和时间效应综合影响的本构模型。对试验数据的预测结果表明:新模型不仅能够合理地考虑加载过程中颗粒破碎及时间因素对变形的影响,而且还能较好地描述荷载稳定时变形随时间的发展规律。Abstract: The influence of loading rate on stress-strain behaviors of rockfill under isotropic compression condition was analyzed. Based on the research achievements of particle crushing for rockfill,the time dependent constitutive relationship was generalized from isotropic to shearing condition,and a constitutive model considering particle crushing and time-effect was proposed further. The comparison of predicted and tested results indicate that the proposed model can not only consider the influence of particle crushing and time-effect on deformation while loading reasonably,but also describe well the deformation with time increasing during holding the load.
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Key words:
- rockfill /
- particle crushing /
- loading rate /
- time-effect /
- constitutive model
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[2] 赵魁芝,李国英,沈珠江.天生桥混凝土面板堆石坝面板原型观测资料分析[J].水利水运工程学报,2001,1(1):38-44. 彭正光.西北口面板堆石坝蓄水7年变形分析[J].水利水电科技,1999,30(9):24-27. [3] 郭兴文,王德信,蔡新,等.混凝土面板堆石坝流变分析[J].水利学报,1999(11):42-47. [4] 周伟,常晓林,曹艳辉.堆石体流变对分期浇筑的面板变形影响研究[J].岩石力学与工程学报,2006,25(9):1043-1048. [5] 刘萌成,高玉峰,黄晓明.考虑强度非线性的堆石料弹塑性本构模型研究[J].岩土工程学报,2005,27(3):294-298. [6] 米占宽,李国英,陈铁林.考虑颗粒破碎的堆石体本构模型[J].岩土工程学报,2007,29(12):1865-1869. [7] 张兵,高玉锋,毛金生,等.堆石料强度和变形性质的大型三轴试验及模型对比研究[J].防灾减灾工程学报,2008,28(1):122-126. [8] 岑威均,王修信.堆石料本构建模途径[J].河海大学学报,2008,36(1):102-105. [9] 沈凤生,陈慧远,潘家铮.混凝土面板堆石坝的蓄水变形分析[J].岩土工程学报,1990,12(1):74-81. [10] 沈珠江.土石料的流变模型及其应用[J].水利水运科学研究,1994(4):335-342. [11] 王勇,殷宗泽.一个用于面板坝流变分析的堆石流变模型[J].岩土力学,2000,21(3):227-230. [12] 王海俊,殷宗泽.堆石流变试验及双屈服面流变模型的研究[J].岩土工程学报,2008,30(7):959-963. [13] 李国英,米占宽,傅华,等.混凝土面板堆石坝堆石料流变特性试验研究[J].岩土力学,2004,25(11):1712-1716. [14] YAO Yang-ping,YAMAMOTO Haruyuki,WANG Nai-dong.Constitutive Model Considering Sand Crushing[J]. Soil and Foundation,2008,48(4):603-608. [15] 王乃东,姚仰平.粒状材料颗粒破碎的力学特性描述[J].工业建筑,2008,38(2):17-20. [16] 殷建华,CLARK J I.土体与时间相关的一维应力-应变性状、弹黏塑性模型和固结分析[J].岩土力学,1994,15(3):65-80. [17] 王海俊.土石坝堆石料的长期变形特性研究[D].南京:河海大学,2008.
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