Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying Cycles
To study the influence of wetting-drying cycles on dynamic mechanical properties of rock masses, the impact compression tests of red sandstone samples were carried out by using a split Hopkinson pressure bar (SHPB) apparatus with a diameter of 50 mm. The results showed that under the same number of...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/6688202 |
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| author | Bin Du Haibo Bai Minglei Zhai Shixin He |
| author_facet | Bin Du Haibo Bai Minglei Zhai Shixin He |
| author_sort | Bin Du |
| collection | DOAJ |
| description | To study the influence of wetting-drying cycles on dynamic mechanical properties of rock masses, the impact compression tests of red sandstone samples were carried out by using a split Hopkinson pressure bar (SHPB) apparatus with a diameter of 50 mm. The results showed that under the same number of wetting-drying cycles, the dynamic compressive strength of red sandstone increased exponentially with the strain rate, and the sensitivity of the strain rate decreased with the increase of wetting-drying cycles. The deterioration effect of wetting-drying cycles was significant, and the dynamic and static compressive strength decreased with the increase of wetting-drying cycles; the higher the strain rate, the stronger the sensitivity to wetting-drying cycles. Besides, the influence of wetting-drying cycles and strain rate was comprehensively studied, and the equation of dynamic compressive strength of red sandstone was obtained. After different wetting-drying cycles, the fractal characteristics of red sandstone dynamic fragmentation were obvious, and the fractal dimension was 2.02–2.80, and the fractal dimension increased logarithmically with the strain rate. Finally, the internal microstructure of red sandstone after different wetting-drying cycles was analyzed, and the degradation mechanism of the rock by the cycles was discussed. |
| format | Article |
| id | doaj-art-6d8dbc2f3ec6478bafed4ed04e737f4a |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-6d8dbc2f3ec6478bafed4ed04e737f4a2025-02-03T06:05:46ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/66882026688202Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying CyclesBin Du0Haibo Bai1Minglei Zhai2Shixin He3School of Architectural Construction, Jiangsu Vocational Institute of Architectural Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaTo study the influence of wetting-drying cycles on dynamic mechanical properties of rock masses, the impact compression tests of red sandstone samples were carried out by using a split Hopkinson pressure bar (SHPB) apparatus with a diameter of 50 mm. The results showed that under the same number of wetting-drying cycles, the dynamic compressive strength of red sandstone increased exponentially with the strain rate, and the sensitivity of the strain rate decreased with the increase of wetting-drying cycles. The deterioration effect of wetting-drying cycles was significant, and the dynamic and static compressive strength decreased with the increase of wetting-drying cycles; the higher the strain rate, the stronger the sensitivity to wetting-drying cycles. Besides, the influence of wetting-drying cycles and strain rate was comprehensively studied, and the equation of dynamic compressive strength of red sandstone was obtained. After different wetting-drying cycles, the fractal characteristics of red sandstone dynamic fragmentation were obvious, and the fractal dimension was 2.02–2.80, and the fractal dimension increased logarithmically with the strain rate. Finally, the internal microstructure of red sandstone after different wetting-drying cycles was analyzed, and the degradation mechanism of the rock by the cycles was discussed.http://dx.doi.org/10.1155/2020/6688202 |
| spellingShingle | Bin Du Haibo Bai Minglei Zhai Shixin He Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying Cycles Advances in Civil Engineering |
| title | Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying Cycles |
| title_full | Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying Cycles |
| title_fullStr | Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying Cycles |
| title_full_unstemmed | Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying Cycles |
| title_short | Experimental Study on Dynamic Compression Characteristics of Red Sandstone under Wetting-Drying Cycles |
| title_sort | experimental study on dynamic compression characteristics of red sandstone under wetting drying cycles |
| url | http://dx.doi.org/10.1155/2020/6688202 |
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