Stress-strain relation of asphalt-concrete in condition of elasto-plastic coupling

ZHU Cheng

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Stress-strain relation of asphalt-concrete in condition of elasto-plastic coupling

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- Stress-strain relation of asphalt-concrete in condition of elasto-plastic coupling
- Vol. 27, Issue S2, (2006)
- 作者机构：
  
  河海大学水电工程学院,南京,210098
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：16 December 2006，
  
  Published：2006
- 稿件说明：
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ZHU Cheng. Stress-strain relation of asphalt-concrete in condition of elasto-plastic coupling[J]. 2006, 27(S2).
DOI：

ZHU Cheng. Stress-strain relation of asphalt-concrete in condition of elasto-plastic coupling[J]. 2006, 27(S2). DOI：

摘要

三轴试验的结果表明，由于应用于水利工程的沥青混凝土自身的孔隙率小，侧向作用效应十分明显，体积变形较小

且主要表现为剪胀特性，目前已有的非线性和弹塑性模型难以正确地反映复杂应力状态下的这种力学行为。考虑沥青混凝土不遵守关联流动法则和Drucker公设，其弹性系数伴随塑性变形过程而改变，建议了一个在弹塑性耦合基础上的双屈服面弹塑性模型，与室内三轴试验结果吻合良好。

Abstract

Results of triaxial test indicates that

due to low porosity

asphalt concrete used in hydraulic engineering has obvious lateral effect and smaller volumetric deformation

and takes on shear-swell characteristics. It is hard to reflect the special stress-strain relationship of asphalt concrete through existing nonlinear models or elastoplastic models. Considering that asphalt concrete does not complying with associated flow rule and Drucker postulation and the elastic coefficient is changed with the plastic deformation. The author suggests a double-yield surface model with elasto-plastic coupling; and it is satisfied with the result of indoor triaxial test.

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