Discrete element modelling of the uniaxial compression behavior of pervious concrete
Pervious concrete (PC) has been widely used in recent years. With increasing attention on PC, it promotes further understanding of its mechanism responsible for the resulted performance. The objective of this study is to propose a 3D discrete element method (DEM) model to simulate the uniaxial compr...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952300116X |
| _version_ | 1797798984565129216 |
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| author | Juanlan Zhou Mulian Zheng Qiwei Zhan Rubing Zhou Yongsheng Zhang Yaqi Wang |
| author_facet | Juanlan Zhou Mulian Zheng Qiwei Zhan Rubing Zhou Yongsheng Zhang Yaqi Wang |
| author_sort | Juanlan Zhou |
| collection | DOAJ |
| description | Pervious concrete (PC) has been widely used in recent years. With increasing attention on PC, it promotes further understanding of its mechanism responsible for the resulted performance. The objective of this study is to propose a 3D discrete element method (DEM) model to simulate the uniaxial compression process and analyze the meso mechanical properties of PC. The user-defined ellipsoid composed of pebble discrete elements was used to simulate aggregate. In the DEM, the mechanical behaviors of materials were simulated with contact constitutive models of discrete elements. The linear contact model and parallel-bond model were employed to simulate the strength properties between two adjacent aggregates, and between cement paste and aggregate. The parallel-bond parameters were calibrated based on the stress-strain curve obtained from the laboratory test. The reliability of the method was verified by comparing the virtual results with the laboratory tests of PC with 6 groups of different aggregate sizes. It was proved that the DEM model established can be used to simulate the rising section of the stress-strain curve of PC accurately. The maximum absolute error of uniaxial compressive strength is 0.67 MPa, and the relative error is within 5%. By analyzing the number of contact points, the contribution rate of different sizes of aggregates to the contact force and the distribution of the force chain, it can be concluded that the coarse aggregate plays a major role in resisting compression load in PC, while fine aggregate mainly increases the number of contact points to achieve force transmission. |
| first_indexed | 2024-03-13T04:12:06Z |
| format | Article |
| id | doaj.art-feb6a9674c344309ab90f830a02a61ba |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:06Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-feb6a9674c344309ab90f830a02a61ba2023-06-21T06:53:51ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e01937Discrete element modelling of the uniaxial compression behavior of pervious concreteJuanlan Zhou0Mulian Zheng1Qiwei Zhan2Rubing Zhou3Yongsheng Zhang4Yaqi Wang5School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212100, China; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Traffi Engineering Group Co., Ltd, Zhenjiang 212100, China; Corresponding author at: School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212100, China.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, South Erhuan Middle Section, Xi’an 710064, China; Corresponding author.School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212100, ChinaSuqian Susu Park Construction and Development Co., Ltd, Suqian 223800, ChinaJiangsu Traffi Engineering Group Co., Ltd, Zhenjiang 212100, ChinaZhenjiang Highway Development Center, Zhenjiang 212028, ChinaPervious concrete (PC) has been widely used in recent years. With increasing attention on PC, it promotes further understanding of its mechanism responsible for the resulted performance. The objective of this study is to propose a 3D discrete element method (DEM) model to simulate the uniaxial compression process and analyze the meso mechanical properties of PC. The user-defined ellipsoid composed of pebble discrete elements was used to simulate aggregate. In the DEM, the mechanical behaviors of materials were simulated with contact constitutive models of discrete elements. The linear contact model and parallel-bond model were employed to simulate the strength properties between two adjacent aggregates, and between cement paste and aggregate. The parallel-bond parameters were calibrated based on the stress-strain curve obtained from the laboratory test. The reliability of the method was verified by comparing the virtual results with the laboratory tests of PC with 6 groups of different aggregate sizes. It was proved that the DEM model established can be used to simulate the rising section of the stress-strain curve of PC accurately. The maximum absolute error of uniaxial compressive strength is 0.67 MPa, and the relative error is within 5%. By analyzing the number of contact points, the contribution rate of different sizes of aggregates to the contact force and the distribution of the force chain, it can be concluded that the coarse aggregate plays a major role in resisting compression load in PC, while fine aggregate mainly increases the number of contact points to achieve force transmission.http://www.sciencedirect.com/science/article/pii/S221450952300116XPervious concreteDiscrete element methodParallel-bond modelStress-strain curve |
| spellingShingle | Juanlan Zhou Mulian Zheng Qiwei Zhan Rubing Zhou Yongsheng Zhang Yaqi Wang Discrete element modelling of the uniaxial compression behavior of pervious concrete Case Studies in Construction Materials Pervious concrete Discrete element method Parallel-bond model Stress-strain curve |
| title | Discrete element modelling of the uniaxial compression behavior of pervious concrete |
| title_full | Discrete element modelling of the uniaxial compression behavior of pervious concrete |
| title_fullStr | Discrete element modelling of the uniaxial compression behavior of pervious concrete |
| title_full_unstemmed | Discrete element modelling of the uniaxial compression behavior of pervious concrete |
| title_short | Discrete element modelling of the uniaxial compression behavior of pervious concrete |
| title_sort | discrete element modelling of the uniaxial compression behavior of pervious concrete |
| topic | Pervious concrete Discrete element method Parallel-bond model Stress-strain curve |
| url | http://www.sciencedirect.com/science/article/pii/S221450952300116X |
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