Research on the Failure Mechanism and Theory of Concrete under Pore Water Pressure

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Research on the Failure Mechanism and Theory of Concrete under Pore Water Pressure

更新时间：2023-11-14

- Research on the Failure Mechanism and Theory of Concrete under Pore Water Pressure
- Advanced Engineering Sciences Vol. 47, Issue Z2, Pages: 76-81(2015)
- 作者机构：
  
  四川大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2015，
  
  Published Online：24 November 2014，
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黄常玲.孔隙水压力条件下混凝土破坏机理与理论探讨[J].工程科学与技术,2015,47(Z2):76-81.

huangchangling. Research on the Failure Mechanism and Theory of Concrete under Pore Water Pressure. [J]. Advanced Engineering Sciences 47(Z2):76-81(2015)
黄常玲.孔隙水压力条件下混凝土破坏机理与理论探讨[J].工程科学与技术,2015,47(Z2):76-81. DOI：

huangchangling. Research on the Failure Mechanism and Theory of Concrete under Pore Water Pressure. [J]. Advanced Engineering Sciences 47(Z2):76-81(2015) DOI：

摘要

中文摘要: 为了探究饱和混凝土在孔隙水压力下的破坏机理，本文在已有的研究基础上，通过理论分析孔隙水压力和当前孔隙率对饱和混凝土微裂纹的演化及宏观力学性能的影响，确定了真实水压力作用下混凝土的I、II型裂纹应力强度因子；复合型裂纹张拉破坏和剪切破坏的主导条件。并利用“YSL-200”型微机控制多通道轴压水压联合作用岩石-混凝土流变试验系统

基于饱和混凝土封闭孔隙水压力Pf和贯通孔隙水压力Pg间的压力梯度

从细观角度解释了混凝土在水环境下的破坏机理。结果表明：孔隙率的变化和Pf、Pg间的压力梯度都是混凝土材料细观破坏的重要原因之一；孔隙水压力下混凝土材料大都呈“X”型剪切破坏；水围压的存在可以提高饱和状态下混凝土的抗压强度。

Abstract

Abstract: In order to explore the failure mechanism of saturated concrete under the pore water pressure

through theory analysis the influence of pore water pressure and porosity for the micro-crack evolution and macro-mechanical properties of concrete on the existing researches

the stress intensity factor for I

II crack of concrete and the prevailing conditions for I-II mixed crack appearing tension failure and shear failure were determined under water environment. Based on pressure gradient between sealed pore water pressure Pf and transfixion pore water pressure Pg

through “YSL-200” computer-controlled hydraulic multi-channel axial compression combined effects of rock rheological，the failure mechanism of concrete under water environment was explained from microscopic perspective. the results showed that: the microscopic failure factors mainly including the change of porosity and hydraulic gradient caused by Pf and Pg; The failure mode belongs to“X”mode shear failure under water environment; The existence of water confining pressure could improve the compressive strength of saturated concrete.

关键词

孔隙水压力应力强度因子孔隙率压力梯度破坏方式破坏机理

Keywords

pore water pressurestress intensity factorporositypressure gradientfailure modefailure mechanism

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