Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios
In order to study the influence of different thickness ratios on the mechanical properties of rock-concrete composite, a 50 mm diameter split Hopkinson pressure bar device (SHPB) was used to conduct impact loading tests on ϕ 50 mm × 50 mm cylindrical composite with sandstone thickness of 0, 5, 10, 1...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2022/3162000 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832565776301686784 |
|---|---|
| author | Qi Ping Kaifan Shen Qi Gao Chen Wang Shuo Wang Yulin Wu Jing Hu |
| author_facet | Qi Ping Kaifan Shen Qi Gao Chen Wang Shuo Wang Yulin Wu Jing Hu |
| author_sort | Qi Ping |
| collection | DOAJ |
| description | In order to study the influence of different thickness ratios on the mechanical properties of rock-concrete composite, a 50 mm diameter split Hopkinson pressure bar device (SHPB) was used to conduct impact loading tests on ϕ 50 mm × 50 mm cylindrical composite with sandstone thickness of 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 mm. The results show that with the increase of the proportion of rock in the composite, the dynamic compressive strength increases gradually, and the dynamic elastic modulus increases linearly. When the rock thickness increases, the average strain rate decreases and the peak strain decreases. In dynamic loading combination behind the rock specimen with concrete cushion, absorb energy decrease with the increase of rock accounted concrete; when the rock is 25 mm, total absorption energy reached its lowest point; when the thickness of the rock is greater than the thickness of concrete, concrete and adjacent parts of rock joint cushion absorb the energy into a rising trend. With the increase of the proportion of rock, the degree of fragmentation of the composite specimens decreases gradually, and the fragments are mostly concrete with smaller particle size, which is correlated with the dynamic compressive strength. The rock-concrete interface is a weak surface relative to the materials on both sides. |
| format | Article |
| id | doaj-art-4f67d29fbabe4d1c88690b89085d9e30 |
| institution | Kabale University |
| issn | 1875-9203 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-4f67d29fbabe4d1c88690b89085d9e302025-02-03T01:06:35ZengWileyShock and Vibration1875-92032022-01-01202210.1155/2022/3162000Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness RatiosQi Ping0Kaifan Shen1Qi Gao2Chen Wang3Shuo Wang4Yulin Wu5Jing Hu6State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal MineResearch Center of Mine Underground EngineeringResearch Center of Mine Underground EngineeringResearch Center of Mine Underground EngineeringResearch Center of Mine Underground EngineeringResearch Center of Mine Underground EngineeringResearch Center of Mine Underground EngineeringIn order to study the influence of different thickness ratios on the mechanical properties of rock-concrete composite, a 50 mm diameter split Hopkinson pressure bar device (SHPB) was used to conduct impact loading tests on ϕ 50 mm × 50 mm cylindrical composite with sandstone thickness of 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 mm. The results show that with the increase of the proportion of rock in the composite, the dynamic compressive strength increases gradually, and the dynamic elastic modulus increases linearly. When the rock thickness increases, the average strain rate decreases and the peak strain decreases. In dynamic loading combination behind the rock specimen with concrete cushion, absorb energy decrease with the increase of rock accounted concrete; when the rock is 25 mm, total absorption energy reached its lowest point; when the thickness of the rock is greater than the thickness of concrete, concrete and adjacent parts of rock joint cushion absorb the energy into a rising trend. With the increase of the proportion of rock, the degree of fragmentation of the composite specimens decreases gradually, and the fragments are mostly concrete with smaller particle size, which is correlated with the dynamic compressive strength. The rock-concrete interface is a weak surface relative to the materials on both sides.http://dx.doi.org/10.1155/2022/3162000 |
| spellingShingle | Qi Ping Kaifan Shen Qi Gao Chen Wang Shuo Wang Yulin Wu Jing Hu Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios Shock and Vibration |
| title | Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios |
| title_full | Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios |
| title_fullStr | Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios |
| title_full_unstemmed | Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios |
| title_short | Experimental Study on Dynamic Performance of Rock-Concrete Composite with Different Thickness Ratios |
| title_sort | experimental study on dynamic performance of rock concrete composite with different thickness ratios |
| url | http://dx.doi.org/10.1155/2022/3162000 |
| work_keys_str_mv | AT qiping experimentalstudyondynamicperformanceofrockconcretecompositewithdifferentthicknessratios AT kaifanshen experimentalstudyondynamicperformanceofrockconcretecompositewithdifferentthicknessratios AT qigao experimentalstudyondynamicperformanceofrockconcretecompositewithdifferentthicknessratios AT chenwang experimentalstudyondynamicperformanceofrockconcretecompositewithdifferentthicknessratios AT shuowang experimentalstudyondynamicperformanceofrockconcretecompositewithdifferentthicknessratios AT yulinwu experimentalstudyondynamicperformanceofrockconcretecompositewithdifferentthicknessratios AT jinghu experimentalstudyondynamicperformanceofrockconcretecompositewithdifferentthicknessratios |