混凝土受拉随机损伤本构关系及其应用

杨卫忠; 王博

doi:10.13204/j.gyjz200410015

混凝土受拉随机损伤本构关系及其应用

doi: 10.13204/j.gyjz200410015

杨卫忠,
王博

1.
郑州大学土木工程学院郑州 450002

基金项目:

河南省科技攻关项目:(项目号:0224370025)

详细信息

作者简介:
杨卫忠男 1966年10月出生副教授同济大学博士研究生

中图分类号: TU528
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- 文章访问数: 64
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- PDF下载量: 80
- 被引次数: 0
出版历程
- 收稿日期: 2004-05-22
- 刊出日期: 2004-10-20

A STOCHASTIC DAMAGE CONSTITUTIONAL MODEL AND ITS APPLICATION TO UNIAXIAL TENSILE BEHAVIOR OF CONCRETE

1.
School of Civil Engineering,Zhengzhou University Zhengzhou 450002

摘要

摘要: 利用扩展的弹簧模型，从细观层次上分析了混凝土试件在单调拉力作用下的宏观性能，解释了混凝土单轴受拉应力-应变关系中的应变软化和应力跌落现象；基于静力平衡和变形协调条件，建立受拉本构关系；利用单轴受拉试验，确定细观损伤单元的极限破坏应变随机场分布参数；与已有试验结果相比较，结果吻合较好。
- 混凝土 /
- 应力-应变关系 /
- 损伤 /
- 应变软化
Abstract: The concrete materials damage, which has been caused by monotonic tensile loading, is analyzed from mesoscopic fracture. The nonlinear performance of the curve is analyzed using a class of mesoscopic springs model. The model can also explain the phenomena such as strain softening and stress drop. With the help of force equilibrium and deformation compatbility, a damage constitutional model of concrete under monotonic tensile loading is put forward. Based on the experiments on the concrete subjected to monotonic tensile loading, the coefficients can be uniquely determined. It is found that the calculated curve has a good agreement with experiment's.
- concrete /
- stress-strain relationship /
- damage /
- strain softening

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参考文献(12)

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GB 50010-2002混凝土结构设计规范

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[10] 李杰.混凝土随机损伤本构关系研究新进展.东南大学学报,2002,32(5) :750～755

[11] Krajcinvic D, Silva M A G. Statistical Aspects of the Continuous Damage Theory. International Journal Solids Structures, 1982, 18 ( 7 ): 557～562

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