Nonlinear creep constitutive model for artificially prepared site soil
-
摘要: 通过三轴蠕变试验,研究了糯米浆掺入量对人工制备遗址土三轴蠕变特性的影响。试验结果表明,在添加了一定量的糯米浆后,人工制备遗址土三轴蠕变量明显减小,稳定时间增长。随着添加糯米浆质量的增加,人工制备遗址土的蠕变量呈现出先减小后增大的趋势,在土与糯米浆质量比为90∶10时,蠕变量达到最小。人工制备遗址土三轴蠕变具有明显的非线性,时间越长,非线性越强。将总的变形分解为线性黏弹性变形、线性黏塑性变形和非线性黏塑性变形,利用模型理论描述其线性应变部分,非线性部分采用经验公式,建立了适合人工制备遗址土三轴蠕变特性的非线性半经验半理论黏弹塑性蠕变本构模型。该模型能较好的描述人工制备遗址土三轴蠕变特性,此非线性蠕变模型以元件模型为骨架,经验公式是对理论模型的非线性修正,具有较高的适用性。
-
关键词:
- 人工制备遗址土 /
- 蠕变 /
- 非线性半经验半理论 /
- 黏弹塑性蠕变本构模型
Abstract: Through the triaxial creep tests, the influences of the mixing amount of glutinous rice slurry on the triaxial creep characteristics of artificially prepared relic soil are studied.The test results show that after adding a certain amount of glutinous rice slurry, the triaxial creep of the artificially prepared ruins soil is significantly reduced, and the stable time increases.With the increase in the quality of the glutinous rice slurry, the creep value of the artificially prepared ruins soil shows a trend of first decreasing and then increasing.When the mass ratio of soil to glutinous rice slurry is 90∶10, the creep value reaches the minimum.The triaxial creep of artificially prepared relic soil has obvious nonlinearity, and the nonlinearity becomes stronger with time.The total deformation is decomposed into linear viscoelastic deformation, linear viscoplastic deformation and nonlinear viscoplastic deformation.The linear strain part is described by the model theory, and the nonlinear part adopts empirical formulas to establish the nonlinear, semi-empirical and semi-theoretical viscoelastic-plastic creep constitutive model, suitable for artificial preparation of site soil.This model can better describe the triaxial creep characteristics of artificially prepared site soils.This nonlinear creep model is based on the element model.The empirical formula is a nonlinear correction of the theoretical model and has high applicability. -
-
![]()
图 1 糯米浆含量对人工制备遗址土三轴蠕变特性影响
Figure 1. Influences of glutinous rice pulp content on triaxial creep properties of artificially prepared site soil
![]()
图 2 人工制备遗址土等时应力应变曲线
Figure 2. Isochronous stress-strain curve of artificially prepared site soil
![]()
图 5 不同时刻下黏塑性过应力-应变曲线
Figure 5. Viscoplastic overstress-strain curves at different time
![]()
图 6 线性黏塑性蠕变柔量和时间的关系曲线
Figure 6. Relation curve between linear viscoplastic creep compliance and time
![]()
图 8 不同时刻线性黏塑性应力-应变曲线
Figure 8. Linear viscoplastic stress-strain curves at different time
![]()
图 9 不同时刻下非线性黏塑性过应力-应变曲线
Figure 9. Nonlinear viscoplastic overstress-strain curves at different time
![]()
图 10 线性黏塑性蠕变柔量和时间的关系曲线
Figure 10. Relation curve between linear viscoplastic creep compliance and time
![]()
图 12 参数A和时间t关系拟合曲线
Figure 12. Fitting curves of relationship between parameter A and time t
![]()
图 13 半经验半理论的非线性黏弹塑性蠕变本构模型
Figure 13. Semi-empirical and semi-theoretical nonlinear viscoelastic-plastic creep constitutive model
![]()
图 14 不同偏应力下试验值和模型拟合值的对比
Figure 14. Comparison between test and model fitting values under different deviator stresses
表 1 土样基本物理性质指标
Table 1 Basic physical properties of soil samples
天然干密度/(g·cm-3) 天然含水率/% 湿陷系数 液限/% 塑限/% 塑性指数Ip 土粒相对质量密度 颗粒组成/% >0.075 mm 0.05~0.075 mm <0.005 mm 1.28 15.2 0.080 28.6 19.0 9.6 2.71 10.2 74.3 15.5 
下载: 导出CSV
表 2 不同糯米浆掺入量下半经验半理论黏弹塑性蠕变本构模型拟合参数
Table 2 Fitting parameters of semi-empirical and semi-theoretical viscoelastic-plastic creep constitutive model for different glutinous rice milk incorporations
土与糯米浆量比S∶R 模型参数 黏弹性部分 黏塑性部分 E1/105Pa E2/105Pa λ1/102h-1 E3/105Pa λ2/102h-1 E4/105Pa λ3/102h-1 C D 100: 0 702.93 107.19 0.13 61.49 46.30 54.14 1.56 0.01 -0.52 97: 3 1448.1 201.84 190.09 92.19 0.95 171.38 12.55 0.07 0.66 90: 10 1464.8 127.13 0.33 182.99 41.25 155.04 17.05 0.17 0.13 87∶13 3230.3 138.31 142.20 79.12 1.08 175.29 9.99 0.028 0.89
下载: 导出CSV
-
[1] 谢定义. 21世纪土力学的思考. 岩土工程学报, 1997, 19(4): 111-114. doi: 10.3321/j.issn:1000-4548.1997.04.019 XIE Ding-yi. Thoughts on soil mechanics in the 21st Century[J]. Chinese Journal of Geotechnical Engineering, 1997, 19(4): 111-114. (in Chinese) doi: 10.3321/j.issn:1000-4548.1997.04.019
[2] BOWMAN E T, SOGA K. Creep, ageing and microstructural change in dense granular materials[J]. Soils and Foundations, 2003, 43(4): 107-117. doi: 10.3208/sandf.43.4_107
[3] ZARETSKII Y S. S.Vyalov's role in the establishment and developmentofsoilrheology[J]. SoilMechanics&Foundation Engineering, 2010, 47(5): 175-179.
[4] 朱才辉, 李宁, 刘俊平. 压实Q3马兰黄土蠕变规律研究[J]. 西安理工大学学报, 2011, 27(4): 392-399. doi: 10.3969/j.issn.1006-4710.2011.04.003 ZHU Cai-hui, LI Ning, LIU Jun-ping. Research on the creep behavior of compacted Q3Malan loess[J]. Journal of Xi'an University of Technology, 2011, 27(4): 392-399. (in Chinese) doi: 10.3969/j.issn.1006-4710.2011.04.003
[5] 何青峰. 延安Q2黄土的力学及流变特性研究[D]. 西安: 长安大学, 2008. HE Qing-feng. Research on Mechanical and Rheological Properties of Yan′an Q2Loess[D]. Xi'an: Chang'an University, 2008. (in Chinese)
[6] 陈亮, 陈寿根, 张恒, 等. 基于分数阶微积分的非线性黏弹塑性蠕变模型[J]. 四川大学学报(工程科学版), 2013, 45(3): 7-11. https://www.cnki.com.cn/Article/CJFDTOTAL-SCLH201303001.htm CHEN Liang, CHEN Shou-geng, ZANG Heng, et al. A nonlinear viscoelasto-plastic creep model based on fractional Calculus[J]. Journal of Sichuan University(Engineering Science Edition), 2013, 45(3): 7-11. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SCLH201303001.htm
[7] 郭增玉, 张朝鹏, 夏旺民. 高湿度Q2黄土的非线性流变本构模型及参数[J]. 岩石力学与工程学报, 2000, 19(6): 780-784. doi: 10.3321/j.issn:1000-6915.2000.06.020 GUO Zeng-yu, ZHANG Chao-peng, XIA Wang-min. Nonlinear rheological constitutive models and their parameters of high moisture Q2 loess[J]. Chinese Journal of Rock Mechanics and Engineering, 2000, 19(6): 780-784. (in Chinese) doi: 10.3321/j.issn:1000-6915.2000.06.020
[8] 李广燕, 刘红霞, 徐明霞. 以糯米灰浆为代表的传统灰浆在古城墙修复中的应用探讨[J]. 四川水泥, 2018(2): 346. doi: 10.3969/j.issn.1007-6344.2018.02.333 Li Guang-yan, Liu Hong-xia, Xu Ming-xia. Discussion on the application of traditional mortar represented by glutinous rice mortar in the restoration of ancient city walls[J]. Sichuan Cement, 2018(2): 346. (in Chinese) doi: 10.3969/j.issn.1007-6344.2018.02.333
[9] 谌文武, 张起勇, 刘宏伟, 等. 糯米浆温度对糯米灰浆加固遗址土的影响[J]. 岩石力学与工程学报, 2017, 36(增刊2): 4244-4250. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2017S2059.htm CHEN Wen-wu, ZHANG Qi-yong, LIU Hongwei, etal. Influence of temperature on glutinous rice slurry strengthening site soil by sticky rice-lime mortar[J]. Chinese Journal of Rock Mechanics and Engineering, Engineering, 2017, 36(S2): 4244-4250. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2017S2059.htm
[10] 胡再强, 于淼, 李宏儒, 等. 人工制备遗址土力学特性试验研究[J]. 岩石力学与工程学报, 2016, 35(9): 1914-1923. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201609021.htm HU Zai-qiang, YU Miao, LI Hong-ru, etal. Experimental study on characteristics of artificial soil ruins[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(9): 1914-1923. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201609021.htm
[11] 杨华山, 车玉君, 马小满. 中国传统糯米-石灰砂浆的原材料和结构[J]. 混凝土, 2015(1): 131-135, 139. https://www.cnki.com.cn/Article/CJFDTOTAL-HLTF201501037.htm YANG Hua-shan, CHE Yu-jun, MA Xiao-man. Raw materials and structure of traditional Chinese glutinous rice-lime mortar[J]. Concrete, 2015(1): 131-135, 139. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HLTF201501037.htm
计量
- 文章访问数:
- HTML全文浏览量: 0
- PDF下载量:
