MECHANICAL ANALYSIS AND EVALUATION OF GRANULAR MATERIALS IN PAVEMENT STRUCTURES

路面结构中颗粒材料的力学分析和评估

• 批准号: 12555130
• 负责人: NISHIZAWA Tatsuo
• 金额: $ 4.1万
• 依托单位: ISHIKAWA NATIONAL COLLEGE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555130/
• 关键词: PAVEMENT; GRANULAR MATERIAL; BASE COUSE; CONSTITUTIVE LOW; THREE DIMENSIONAL FINITE ELEMENT METHOD; STRUCTURAL DESIGN; PHOTO ELASTIC TEST

Granular material layers have not been considered to have high structural quality in pavement structures. The object of this project is to develop new analysis and evaluation methods of granular materials in pavement structure. For this purpose, the investigators have been divided into five groups and conducted their studies in collaboration among these groups. Outcomes of each group are as follows. Name(s) in parenthesis is(are) investigator(s) :Group A. Modeling granular base course (Nishizawa) : A program package for structural analysis of pavement based on three dimensional finite element analysis, Pave3D was developed. Extended SMP Criterion Modified Cam-clay model, which was developed by Group B, was incorporated into the Pave3D. Using the model, effects of permanent deformation of granular subbase in a concrete pavement was investigated. It was found that the permanent deformation of base course significantly increases concrete stresses.Group B. Modeling mechanical behavior of g … More ranular material (Koyanagawa, and Takeuchi) : Existence of permanent deformation of base course under concrete slab was confirmed from a repetitive loading experiment. Then to apply the Extended SMP Criterion Modified Cam-clay model to granular materials, triaxial compression test was conducted on a granular base course material and parameters required for the model were identified.Group C. Micro-mechanics of granular material (Murai) : Visualization of stress transfer path in granular material under compressive and shear tests was tried using the two dimensional photo-elastic test. From the results, effect of gradation on stress transfer path was investigated.Group D. Improvement of construction of granular base course (Hachiya) : New base course material was developed using reclaimed asphalt concrete stabilized with cement. Also, effects of water content, compaction degree and thickness on construction were investigated. The results revealed that the effect of water content is very small if compaction is sufficient.Group E. Structural evaluation of granular base course (Kamiura) : In order to precisely evaluate mechanical property of granular base course, applicability of compact FWD and PS layer inspection method were examined. It was found that both methods can be used for the evaluation and the difference between those two methods is very small. Less

散体材料层在路面结构中一直被认为具有不高的结构质量。本项目的目标是开发新的路面结构中颗粒材料的分析和评价方法。为此目的，调查人员被分成五个小组，并在这些小组之间合作进行研究。各组结果如下。括号中的名字是(现)调查员(S)：A组：模拟碎石基层(西泽)：开发了一个基于三维有限元分析的路面结构分析程序包Pave3D。将B组开发的扩展SMP准则修正的Cam-Clay模型引入到Pave3D中。利用该模型，研究了水泥混凝土路面颗粒底基层永久变形的影响。发现基层的永久变形显著增加了混凝土的应力。B组模拟g…的力学行为更多的粒状材料(小柳川和竹内)：重复加载试验证实混凝土板底基层存在永久变形。然后将扩展的SMP准则修正的Cam-Clay模型应用于散体材料，对散体基层材料进行了三轴压缩试验，并确定了模型所需的参数。C组散体材料的微观力学(MURAI)：尝试利用二维光弹性试验来可视化压缩和剪切试验下散体材料中的应力传递路径。根据试验结果，探讨了级配对应力传递路径的影响。D组碎石基层施工改进(Hchiya)：利用水泥稳定的再生沥青混凝土研制了新型基层材料。此外，还研究了含水率、压实度和厚度对施工的影响。E组碎石基层结构评价(Kamiura)：为了准确评价碎石基层的力学性能，对压实FWD和PS层检测方法的适用性进行了考察。结果表明，两种方法均可用于评价，且两种方法之间的差异很小。较少

项目成果

T.Nishizawa, et al.: "Effects of Plastic Deformation of Granular Base on Performance of Concrete Pavement Slab"5^<th> International CROW-Workshop on Fundamental Modeling of Design and Performance of Concrete. (In printing).

T.Nishizawa 等人：“粒状基层塑性变形对混凝土路面板性能的影响”第 5 届国际 CROW 混凝土设计和性能基础建模研讨会。

Y. Takeuchi: "Permanent Deformation of Base Course under Concrete Pavement and Its Effect to Fatigue Failure"Proc. of 7th International Conference on Concrete Pavements. 195-208

Y. Takeuchi：“混凝土路面下基层的永久变形及其对疲劳破坏的影响”Proc。

Y.Takeuchi et al.: "Permanent Deformation of Base Course under Concrete Pavement and Its Effect to Fatigue Failure"Proc. of 7th International Conference on Concrete Pavements. 195-208 (2001)

Y.Takeuchi 等：“混凝土路面下基层的永久变形及其对疲劳破坏的影响”Proc。

T. Nishizawa: "Effects of Plastic Deformation of Granular Base on Performance of Concrete Pavement Slab"5^<Th> International CROW-Workshop on Fundamental Modeling of Design and Performance of Concrete Pavements.

T. Nishizawa：“颗粒基层塑性变形对混凝土路面板性能的影响”5^<Th>国际 CROW 混凝土路面设计和性能基础建模研讨会。

Y. Takeuchi, et al.: "Experimental Study of K-value and Elastic Modulus of Base Course in Concrete Pavement"Journal of Materials, Concrete Structures and Pavements, JSCE. No.669. 17-25 (2001)

Y. Takeuchi等人：“混凝土路面基层K值和弹性模量的实验研究”材料、混凝土结构和路面杂志，JSCE。