冻土不同拉伸试验强度差异性研究

于长一; 刘爱民; 郭炳川; 刘文彬

doi:10.11779/CJGE2019S2040

冻土不同拉伸试验强度差异性研究 English Version

于长一^{1, 2, 3},
刘爱民^{1, 2, 3},
郭炳川^2, ,,
刘文彬^{1, 2, 3}

1. 中交天津港湾工程研究院有限公司,天津 300222;
2.中交第一航务工程局有限公司,天津 300461;
3. 天津市港口岩土工程技术重点实验室,天津 300222

基金项目: 天津市自然科学基金青年项目（16JCQNJC07200）; 天津市自然科学基金一般项目（16JCYBJC21700）

详细信息

作者简介:
于长一(1988— ),男,博士,主要从事岩土非连续数值模拟算法开发及实验研究。E-mail: yu_longone@163.com。

通讯作者:
郭炳川，E-mail：gbc0608@163.com

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出版历程
- 收稿日期: 2019-04-28
- 发布日期: 2019-07-19

Different tensile tests on difference of strength of frozen soils

YU Chang-yi^{1, 2, 3},
LIU Ai-min^{1, 2, 3},
GUO Bing-chuan^2, ,,
LIU Wen-bin^{1, 2, 3}

1. CCCC-Tianjin Port Engineering Institute Co., Ltd., Tianjin 300222, China;
2. CCCC First Harbor Engineering Company, Co., Ltd., Tianjin 300461, China;
3. Key Laboratory of Geotechnical Engineering, Ministry of Communications, Tianjin 300222, China

摘要

摘要: 冻土拉伸强度是冻土工程设计的重要指标,在试验中发现冻土单轴拉伸强度和四点弯曲拉伸强度值不一致。为此采用细观数值方法,假设细观材料参数符合Weibull分布,采用损伤模型,宏观材料性能符合线弹性假设,分别模拟了单轴拉伸试验和四点弯曲拉伸试验。引入非局部化理论,解释了其强度差异来源于材料均质度,并且定量地给出了材料特征长度和均质度之间的关系。为冻土拉伸强度测量和冻土设计提供理论基础。
- 冻土 /
- 拉伸强度 /
- Weibull分布 /
- 非均匀
Abstract: The tensile strength of frozen soils is an important index in engineering design. In the tests, it is found that the uniaxial tensile strength of frozen soils is inconsistent with the four-point bending tensile strength. For this reason, the mesoscopic numerical method, assuming that the parameters of mesoscopic materials conform to the Weibull distribution, and the damage model are adopted. The properties of macroscopic materials conform to the linear elastic hypothesis. The uniaxial tensile tests and the four-point bending tensile tests are simulated respectively. By introducing the theory of non-localization, it is explained that the strength difference comes from the homogeneity of the materials, and the relationship between the characteristic length of the materials and the homogeneity is quantitatively given. It provides a theoretical basis for measuring the tensile strength of frozen soils and designing the frozen soils.
- frozen soil /
- tensile strength /
- Weibull distribution /
- heterogeneity

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参考文献(13)

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