超低温环境下混凝土本构关系试验研究

李响; 谢剑; 吴洪海

doi:10.6052/j.issn.1000-4750.2013.04.S008

超低温环境下混凝土本构关系试验研究

李响¹,
谢剑^{1, 2,},
吴洪海¹

1.
天津大学建筑工程学院土木工程系,天津 300072;
2.
天津大学滨海土木工程结构与安全教育部重点实验室,天津 300072

基金项目: 国家自然科学基金项目(51078260)

详细信息

作者简介:
李响(1989―),女,吉林人,硕士生,主要从事低温混凝土结构力学性能试验研究(E-mail:xianglee99@126.com)；吴洪海(1986―),男,河北人,硕士生,主要从事超低温冻融循环对混凝土性能影响研究(E-mail:whhai1987@163.com).

通讯作者:
谢剑(1974―),男,河北人,副教授,博士,主要从事混凝土基本理论研究(E-mail:xiejian@tju.edu.cn).

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- 文章访问数: 542
- HTML全文浏览量: 49
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出版历程
- 收稿日期: 2013-03-31
- 修回日期: 2013-11-26
- 刊出日期: 2014-06-24

EXPERIMENTAL RESEARCH ON THE CONSTITUTIVE RELATIONSHIP OF CONCRETE IN A CRYOGENIC ENVIRONMENT

LI Xiang¹,
XIE Jian^{1, 2,},
WU Hong-hai¹

1.
Department of Civil Engineering, Tianjin University, Tianjin 300072, China;
2.
Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin University, Tianjin 300072, China

摘要

摘要: 针对超低温下混凝土本构关系进行试验研究,通过对试验数据整理分析,得出在20℃、0℃、-40℃、-80℃、-120℃、-160℃六个温度点下的应力-应变全曲线。该试验以抗压强度、弹性模量、峰值应变为主要测试指标。试验结果表明,试验温度越低,试件的破坏越迅速,测得的应力-应变全曲线下降段越短且越陡峭。随着温度降低,混凝土的峰值应变减小,脆性增大,强度与弹性模量均有所提高,且各自的提高程度与温度有关,全曲线的上升段与下降段可以用三次多项式与有理式分别拟合。
- 超低温 /
- 混凝土 /
- 本构关系 /
- 弹性模量 /
- 峰值应变
Abstract: To develop a concrete constitutive relationship under cryogenic conditions, stress-strain curves were developed by sorting test data from the following temperature conditions: 20℃, 0℃, -40℃, -80℃, -120℃, -160℃. Compressive strength, elastic modulus, and peak strain were taken as key indicators in this test. The test shows that specimens are damaged more quickly at lower temperatures, and the descending branch of the curve is shorter than in normal conditions. Moreover, the lower the temperature, the shorter and the steeper the descending branch becomes. From the results, we can conclude that the concrete peak strain drops with decreased temperature, meaning the brittleness tends to increase. Both the compressive strength and elastic modulus increase, but the respective improvement of their performance has to do with the temperature. A third-order polynomial and a rational expression are proposed to describe the rising branch and descending branch, respectively.
- cryogenic /
- concrete /
- constitutive relation /
- elastic modulus /
- peak strain

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参考文献(12)

[1]	王传星, 谢剑, 李会杰. 低温环境下混凝土性能的试验研究[J]. 工程力学, 2011, 28(增刊2): 182―186. Wang Chuanxing, Xie Jian, Li Huijie. Experimental research on the properties of concrete under low-temperature [J]. Engineering Mechanics, 2011, 28(Suppl 2): 182―186. (in Chinese)
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[3]	过镇海, 时旭东. 钢筋混凝土原理与分析[M]. 北京: 清华大学出版社, 2003: 20―24. Guo Zhenhai, Shi Xudong. Reinforced concrete theory and analysis [M]. Beijing: Tsinghua University Press, 2003: 20―24. (in Chinese)
[4]	魏强, 谢剑, 吴洪海. 超低温冻融循环对混凝土材料性能的影响[J]. 工程力学, 2013, 30(增刊1): 125―131. Wei Qiang, Xie Jian, Wu Honghai. Experimental analysis on properties of concrete after freeze-thaw cycles under extra-low temperatures [J]. Engineering Mechanics, 2013, 30(Suppl 1): 125―131. (in Chinese)
[5]	Liu S, Gu X L, Huang Q H, Zhang W P. Experimental study on the bending behavior of reinforced concrete beams under super-low temperature [C]// 12th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments. Honolulu United States: American Society of Civil Engineers, 2010: 3537―3544.
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[7]	Lahlou Dahmani, Amar Khenane, Salah Kaci. Behavior of the reinforced concrete at cryogenic temperatures [J]. Cryogenics, 2007, 47(9): 517―525.
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[11]	蒋正武, 张楠, 李雄鹰, 等. 国外超低温下混凝土性能的研究进展评述[J]. 材料导报A: 综述篇, 2011, 25(7): 1―4. Jiang Zhengwu, Zhang Nan, Li Xiongying, et al. State-of-art review on properties of concrete at cryogenic temperature overseas [J]. Materials Review A: Review, 2007, 25(7): 1―4. (in Chinese)
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文章访问数: 542
HTML全文浏览量: 49
PDF下载量: 113
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超低温环境下混凝土本构关系试验研究

作者简介: 李响(1989―),女,吉林人,硕士生,主要从事低温混凝土结构力学性能试验研究(E-mail:xianglee99@126.com)；吴洪海(1986―),男,河北人,硕士生,主要从事超低温冻融循环对混凝土性能影响研究(E-mail:whhai1987@163.com).

通讯作者: 谢剑(1974―),男,河北人,副教授,博士,主要从事混凝土基本理论研究(E-mail:xiejian@tju.edu.cn).

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出版历程

EXPERIMENTAL RESEARCH ON THE CONSTITUTIVE RELATIONSHIP OF CONCRETE IN A CRYOGENIC ENVIRONMENT

计量

出版历程

目录

作者简介:
李响(1989―),女,吉林人,硕士生,主要从事低温混凝土结构力学性能试验研究(E-mail:xianglee99@126.com)；吴洪海(1986―),男,河北人,硕士生,主要从事超低温冻融循环对混凝土性能影响研究(E-mail:whhai1987@163.com).

通讯作者:
谢剑(1974―),男,河北人,副教授,博士,主要从事混凝土基本理论研究(E-mail:xiejian@tju.edu.cn).