Hypoplastic material constants for a well-graded granular material for base and subbase layers of flexible pavements
Hypoplastic material constants for a well-graded granular material for base and subbase layers of flexible pavements
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用于柔性路面基层和底基层的良好级配颗粒材料的低塑性材料常数
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
A. Lizcano
中科院分区：
文献类型：
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作者：
H. Rondón;T. Wichtmann;T. Triantafyllidis;A. Lizcano
本文介绍了一个研究项目的第一阶段的结果，该项目处理了当用于柔性路面结构的基层或次基层时，分级良好的颗粒材料（所谓的“未结合颗粒材料”，UGMs）的行为的本构描述。考虑了单调和循环荷载。本文主要讨论单调荷载的试验结果和本构描述。本构模型采用von Wolffersdorff提出的低塑性模型。文献中不存在典型UGM材料的材料常数集。本文叙述了用Herle提出的方法测定一组常数的实验方法。在单调三轴试验中，采用方形截面试样。本文介绍了一个初步的试验系列，比较了柱形和棱柱形试样得到的三轴结果。并给出了单元试验的重新计算结果。仿真结果与实验结果吻合较好。
This paper presents the results of the first phase of a research project dealing with the constitutive description of the behaviour of well-graded granular materials when used for base or subbase layers in flexible pavement structures (so-called “unbound granular materials”, UGMs). Monotonic and cyclic loading is under consideration. The present paper concentrates on test results and the constitutive description of monotonic loading. Hypoplasticity in the version proposed by von Wolffersdorff is used as the constitutive model. Sets of material constants for typical UGM materials do not exist in the literature. The experimental determination of a set of constants according to the procedure proposed by Herle is described in this paper. In the monotonic triaxial tests specimens with a square cross-section were used. The paper presents a preliminary test series comparing triaxial results obtained with cylindrical and with prismatic specimens. Re-calculations of the element tests are also presented. The simulations show a good congruence with the experiments.