Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement
In order to investigate the influence of modulus of the base layer on the strain distribution for asphalt pavement, the modulus ratio of the base layer and the AC layer (Rm) is introduced as a controlled variable when keeping modulus of the AC layer as a constant in this paper. Then, a three-layered...
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| Language: | English |
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Riga Technical University Press
2021-12-01
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| Series: | The Baltic Journal of Road and Bridge Engineering |
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| Online Access: | https://bjrbe-journals.rtu.lv/article/view/5296 |
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| author | Kang Yao Xin Jiang Jin Jiang Zhonghao Yang Yanjun Qiu |
| author_facet | Kang Yao Xin Jiang Jin Jiang Zhonghao Yang Yanjun Qiu |
| author_sort | Kang Yao |
| collection | DOAJ |
| description | In order to investigate the influence of modulus of the base layer on the strain distribution for asphalt pavement, the modulus ratio of the base layer and the AC layer (Rm) is introduced as a controlled variable when keeping modulus of the AC layer as a constant in this paper. Then, a three-layered pavement structure is selected as an analytical model, which consists of an AC layer with the constant modulus and a base layer with the variable modulus covering the subgrade. A three dimensional (3D) finite element model was established to estimate the strains along the horizontal and vertical direction in the AC layer under different Rm. The results show that Rm will change the distribution of the horizontal strains along the depth in the AC layer; the increase of Rm could reduce the maximum tensile strain in the AC layer, but its effect is limited; the maximum tensile strain in the AC layer does not necessarily occur at the bottom, but gradually rises to the middle with the increase of Rm. Rm could significantly decline the bottom strain in the AC layer, and there is a certain difference between the bottom and the maximum strain when Rm is greater than or equal to one, which will enlarge with increasing Rm. Rm could change the depth of the neutral axis in the AC layer, and the second neutral axis will appear at the bottom of the AC layer under a sufficiently large Rm. The average vertical compressive strain in the AC layer will significantly enlarge with the increase of Rm. |
| format | Article |
| id | doaj-art-242191040b564b7abfae3fa2e9700acf |
| institution | OA Journals |
| issn | 1822-427X 1822-4288 |
| language | English |
| publishDate | 2021-12-01 |
| publisher | Riga Technical University Press |
| record_format | Article |
| series | The Baltic Journal of Road and Bridge Engineering |
| spelling | doaj-art-242191040b564b7abfae3fa2e9700acf2025-08-20T02:08:38ZengRiga Technical University PressThe Baltic Journal of Road and Bridge Engineering1822-427X1822-42882021-12-0116412615210.7250/bjrbe.2021-16.5422734Influence of Modulus of Base Layer on The Strain Distribution for Asphalt PavementKang Yao0Xin Jiang1Jin Jiang2Zhonghao Yang3Yanjun Qiu4School of Civil Engineering, Southwest Jiaotong University, Chengdu, China MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, China Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, China MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, China Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, China MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, China Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, China MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, China Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, China MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, China Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu, ChinaIn order to investigate the influence of modulus of the base layer on the strain distribution for asphalt pavement, the modulus ratio of the base layer and the AC layer (Rm) is introduced as a controlled variable when keeping modulus of the AC layer as a constant in this paper. Then, a three-layered pavement structure is selected as an analytical model, which consists of an AC layer with the constant modulus and a base layer with the variable modulus covering the subgrade. A three dimensional (3D) finite element model was established to estimate the strains along the horizontal and vertical direction in the AC layer under different Rm. The results show that Rm will change the distribution of the horizontal strains along the depth in the AC layer; the increase of Rm could reduce the maximum tensile strain in the AC layer, but its effect is limited; the maximum tensile strain in the AC layer does not necessarily occur at the bottom, but gradually rises to the middle with the increase of Rm. Rm could significantly decline the bottom strain in the AC layer, and there is a certain difference between the bottom and the maximum strain when Rm is greater than or equal to one, which will enlarge with increasing Rm. Rm could change the depth of the neutral axis in the AC layer, and the second neutral axis will appear at the bottom of the AC layer under a sufficiently large Rm. The average vertical compressive strain in the AC layer will significantly enlarge with the increase of Rm.https://bjrbe-journals.rtu.lv/article/view/5296asphalt pavementelastic modulusfinite element methodmechanical responseneutral axis |
| spellingShingle | Kang Yao Xin Jiang Jin Jiang Zhonghao Yang Yanjun Qiu Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement The Baltic Journal of Road and Bridge Engineering asphalt pavement elastic modulus finite element method mechanical response neutral axis |
| title | Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement |
| title_full | Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement |
| title_fullStr | Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement |
| title_full_unstemmed | Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement |
| title_short | Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement |
| title_sort | influence of modulus of base layer on the strain distribution for asphalt pavement |
| topic | asphalt pavement elastic modulus finite element method mechanical response neutral axis |
| url | https://bjrbe-journals.rtu.lv/article/view/5296 |
| work_keys_str_mv | AT kangyao influenceofmodulusofbaselayeronthestraindistributionforasphaltpavement AT xinjiang influenceofmodulusofbaselayeronthestraindistributionforasphaltpavement AT jinjiang influenceofmodulusofbaselayeronthestraindistributionforasphaltpavement AT zhonghaoyang influenceofmodulusofbaselayeronthestraindistributionforasphaltpavement AT yanjunqiu influenceofmodulusofbaselayeronthestraindistributionforasphaltpavement |