Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfaces
The mechanical properties of pile–soil interfaces directly affect the bearing capacity of pile foundations. In this study, the effects of triangular groove inclination angles on the mechanical properties of sand–concrete interfaces were investigated. Random rough concrete surfaces were obtained thro...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423004404 |
| _version_ | 1797798875606548480 |
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| author | Huanhuan Li Shaojun Fu Dayong Zhu Gang Li Songlin Shen |
| author_facet | Huanhuan Li Shaojun Fu Dayong Zhu Gang Li Songlin Shen |
| author_sort | Huanhuan Li |
| collection | DOAJ |
| description | The mechanical properties of pile–soil interfaces directly affect the bearing capacity of pile foundations. In this study, the effects of triangular groove inclination angles on the mechanical properties of sand–concrete interfaces were investigated. Random rough concrete surfaces were obtained through slurry intrusion testing, and the roughness of concrete surfaces was evaluated based on the sand cone method. According to the roughness of random concrete surfaces, five regular concrete surfaces with different triangular groove inclination angles were constructed. A series of direct shear tests between (i) sand and random concrete surface, (ii) sand and regular concrete surface, as well as (iii) sand and smooth concrete surface were performed. Moreover, a direct shear test of natural sand was conducted. Lastly, a shear strength model considering the triangular groove inclination angle of sand–concrete interfaces was established, and the shear failure mechanism of interfaces was discussed. The results firstly indicated that the shear stress-displacement curves of random rough concrete surfaces were ideal elastic-plastic curves; and the regular rough concrete surfaces were found to incur strain softening under a normal stress of 300 kPa. Secondly, the shear strength of sand–concrete interfaces increased with the increase in groove inclination angle of concrete interfaces. Thirdly, sand was found to achieve the highest shear strength, while sand–smooth concrete interfaces proved to attain the lowest. Lastly, the internal friction angle value of random concrete interfaces was shown to range between the values of concrete surfaces with triangular groove inclination angles of 70° and 90°. |
| first_indexed | 2024-03-13T04:10:22Z |
| format | Article |
| id | doaj.art-6746b1946aa24879bdc9e6dd29c1986e |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:10:22Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-6746b1946aa24879bdc9e6dd29c1986e2023-06-21T06:55:24ZengElsevierJournal of Materials Research and Technology2238-78542023-05-0124159172Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfacesHuanhuan Li0Shaojun Fu1Dayong Zhu2Gang Li3Songlin Shen4School of Civil Engineering and Architecture, NingboTech University, Ningbo 315100, China; Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an 710123, ChinaSchool of Civil Engineering, Wuhan University, Wuhan 430072, China; Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an 710123, ChinaSchool of Civil Engineering and Architecture, NingboTech University, Ningbo 315100, China; Corresponding author. School of Civil Engineering and Architecture, NingboTech University, Qianhu South Road, Ningbo 315100, China.Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an 710123, ChinaChina MCC22 Group Corporation Ltd., Tangshan 063000, China; Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an 710123, ChinaThe mechanical properties of pile–soil interfaces directly affect the bearing capacity of pile foundations. In this study, the effects of triangular groove inclination angles on the mechanical properties of sand–concrete interfaces were investigated. Random rough concrete surfaces were obtained through slurry intrusion testing, and the roughness of concrete surfaces was evaluated based on the sand cone method. According to the roughness of random concrete surfaces, five regular concrete surfaces with different triangular groove inclination angles were constructed. A series of direct shear tests between (i) sand and random concrete surface, (ii) sand and regular concrete surface, as well as (iii) sand and smooth concrete surface were performed. Moreover, a direct shear test of natural sand was conducted. Lastly, a shear strength model considering the triangular groove inclination angle of sand–concrete interfaces was established, and the shear failure mechanism of interfaces was discussed. The results firstly indicated that the shear stress-displacement curves of random rough concrete surfaces were ideal elastic-plastic curves; and the regular rough concrete surfaces were found to incur strain softening under a normal stress of 300 kPa. Secondly, the shear strength of sand–concrete interfaces increased with the increase in groove inclination angle of concrete interfaces. Thirdly, sand was found to achieve the highest shear strength, while sand–smooth concrete interfaces proved to attain the lowest. Lastly, the internal friction angle value of random concrete interfaces was shown to range between the values of concrete surfaces with triangular groove inclination angles of 70° and 90°.http://www.sciencedirect.com/science/article/pii/S2238785423004404Sand–concrete interfaceRough topographyTriangular groove inclination angleDirect shear testShear strength model |
| spellingShingle | Huanhuan Li Shaojun Fu Dayong Zhu Gang Li Songlin Shen Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfaces Journal of Materials Research and Technology Sand–concrete interface Rough topography Triangular groove inclination angle Direct shear test Shear strength model |
| title | Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfaces |
| title_full | Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfaces |
| title_fullStr | Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfaces |
| title_full_unstemmed | Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfaces |
| title_short | Experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand–concrete interfaces |
| title_sort | experimental study on the effects of triangular groove inclination angles on the mechanical behavior of sand concrete interfaces |
| topic | Sand–concrete interface Rough topography Triangular groove inclination angle Direct shear test Shear strength model |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423004404 |
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