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| 沥青混合料劈裂试验的细观有限元模拟与测试 |
| On the mesoscopic finite element simulation and measurement of bituminous mixture splitting experiment |
| Received:February 23, 2017 Revised:April 27, 2017 |
| DOI：10.7520/1001-4888-17-039 |
| 中文关键词: 道路工程 沥青混合料 马歇尔劈裂试验 细观有限元分析 细观光学试验 应变响应 |
| 英文关键词:road engineering bituminous mixture marshall splitting experiment mesoscopic finite element analysis meso-optical experiment strain response |
| 基金项目:国家自然科学基金(51072149);交通运输部科技项目(2015319811320) |
| Author Name | Affiliation | | FU Jun* | School of Transportation, Wuhan University of Technology, Wuhan 430063, Hubei, China | | LIU Jie | School of Transportation, Wuhan University of Technology, Wuhan 430063, Hubei, China | | LEI Li | School of Transportation, Wuhan University of Technology, Wuhan 430063, Hubei, China | | MA Xiao-dong | School of Transportation, Wuhan University of Technology, Wuhan 430063, Hubei, China | | LIU Zhi-hong | School of Transportation, Wuhan University of Technology, Wuhan 430063, Hubei, China |
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| 中文摘要: |
| 为分析沥青混合料的细观尺度破坏机理，采用数字图像技术将AC-25沥青混合料离散为集料、联结料、孔隙三相复合材料，基于ANSYS软件建立马歇尔试件的二维细观有限元模型，输入各相介质的力学参数，虚拟细观劈裂破坏试验。基于非接触式光学方法，测试AC-25马歇尔试件劈裂试验中各相介质应变，并与虚拟细观有限元分析结果进行对比。结果表明,虚拟细观分析的各相介质参数影响较大，细观光学应变测试结果大于虚拟细观分析结果，但虚拟细观应变响应与光学测试结果规律相似，两种分析中沥青混合料破坏的薄弱环节均为联结料与界面。 |
| 英文摘要: |
| In order to analyze the meso-scale failure mechanism of bituminous mixture, digital image technology was adopted to separate AC-25 bituminous mixture into a three-phase composite material: aggregate, coupling material and pore. Based on ANSYS software, two-dimensional meso-scale finite element model of Marshall specimen was established. By inputting the mechanical parameters of each phase medium, virtual mesoscopic splitting failure experiment was carried out. Based on non-contact optical method, the strain of each phase medium in splitting experiment of AC-25 Marshall specimen was measured. Obtained results were compared with that from the virtual meso-finite element analysis. Results show that the parameters of each phase medium have great influence on the virtual mesoscopic analysis. The results of meso-optical strain experiment are larger than that from virtual meso analysis's. However, the virtual strain response is similar to meso-optical experimental results, and in above two kinds of analysis, the weak links of bituminous mixture's failure are both coupling material and different material interface. |
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