Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate Concrete
To study the bond–slip behavior of steel–steel fiber recycled aggregate concrete, push-out tests of 16 specimens were carried out using steel fiber volume ratio, steel fiber aspect ratio, steel protective layer thickness and steel embedded length as the design parameters. In addition, the crack patt...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/6/823 |
| _version_ | 1797489255464828928 |
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| author | Rui Ren Xinjiang Xu Dongbo Li Li Fan Qinlong Liu Xiguang Liu |
| author_facet | Rui Ren Xinjiang Xu Dongbo Li Li Fan Qinlong Liu Xiguang Liu |
| author_sort | Rui Ren |
| collection | DOAJ |
| description | To study the bond–slip behavior of steel–steel fiber recycled aggregate concrete, push-out tests of 16 specimens were carried out using steel fiber volume ratio, steel fiber aspect ratio, steel protective layer thickness and steel embedded length as the design parameters. In addition, the crack patterns, steel strain distribution, and load–slip curves were studied, in addition to the bond strengths of the interface between the steel–steel fiber and recycled aggregate concrete. The results showed that the fracture cracks of the specimens mainly included bond cracks and expansion cracks. For the load increase stage, the maximum strain of the steel flange was near the loading end of the steel and decreased toward the free end, while the strain changed linearly for the load descending stage. The bond–slip process between the steel–steel fiber and recycled aggregate concrete included five stages, which consisted of slight-slip, slow-slip, accelerated-slip, the sharp-slip and load-steep-drop stage, and gentle-slip stage. Additionally, the influencing factors of bond strength were analyzed, where the bond strength increased first and then decreased with increasing steel fiber volume and steel fiber aspect ratios, and the bond strength increased with increasing steel protective layer thickness. The ultimate bond strength decreased slightly with increasing steel embedded length. Finally, the equation for calculating the characteristic bond strength of the steel–steel fiber recycled aggregate concrete was established, which showed that the calculation results were in good agreement with the test results. |
| first_indexed | 2024-03-10T00:13:54Z |
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| id | doaj.art-47bb9e122f4c459584347a3ec6e0a5ad |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T00:13:54Z |
| publishDate | 2022-06-01 |
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| series | Buildings |
| spelling | doaj.art-47bb9e122f4c459584347a3ec6e0a5ad2023-11-23T15:53:57ZengMDPI AGBuildings2075-53092022-06-0112682310.3390/buildings12060823Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate ConcreteRui Ren0Xinjiang Xu1Dongbo Li2Li Fan3Qinlong Liu4Xiguang Liu5School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710064, ChinaSchool of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710064, ChinaSchool of Science, Xi’an University of Architecture & Technology, Xi’an 710064, ChinaSchool of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710064, ChinaSchool of Science, Xi’an University of Architecture & Technology, Xi’an 710064, ChinaSchool of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710064, ChinaTo study the bond–slip behavior of steel–steel fiber recycled aggregate concrete, push-out tests of 16 specimens were carried out using steel fiber volume ratio, steel fiber aspect ratio, steel protective layer thickness and steel embedded length as the design parameters. In addition, the crack patterns, steel strain distribution, and load–slip curves were studied, in addition to the bond strengths of the interface between the steel–steel fiber and recycled aggregate concrete. The results showed that the fracture cracks of the specimens mainly included bond cracks and expansion cracks. For the load increase stage, the maximum strain of the steel flange was near the loading end of the steel and decreased toward the free end, while the strain changed linearly for the load descending stage. The bond–slip process between the steel–steel fiber and recycled aggregate concrete included five stages, which consisted of slight-slip, slow-slip, accelerated-slip, the sharp-slip and load-steep-drop stage, and gentle-slip stage. Additionally, the influencing factors of bond strength were analyzed, where the bond strength increased first and then decreased with increasing steel fiber volume and steel fiber aspect ratios, and the bond strength increased with increasing steel protective layer thickness. The ultimate bond strength decreased slightly with increasing steel embedded length. Finally, the equation for calculating the characteristic bond strength of the steel–steel fiber recycled aggregate concrete was established, which showed that the calculation results were in good agreement with the test results.https://www.mdpi.com/2075-5309/12/6/823steel-reinforced concretesteel fiber recycled aggregate concretebond failurebond strength |
| spellingShingle | Rui Ren Xinjiang Xu Dongbo Li Li Fan Qinlong Liu Xiguang Liu Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate Concrete Buildings steel-reinforced concrete steel fiber recycled aggregate concrete bond failure bond strength |
| title | Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate Concrete |
| title_full | Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate Concrete |
| title_fullStr | Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate Concrete |
| title_full_unstemmed | Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate Concrete |
| title_short | Experimental Study on the Bond-Slip Behavior of Steel-Steel Fiber Recycled Aggregate Concrete |
| title_sort | experimental study on the bond slip behavior of steel steel fiber recycled aggregate concrete |
| topic | steel-reinforced concrete steel fiber recycled aggregate concrete bond failure bond strength |
| url | https://www.mdpi.com/2075-5309/12/6/823 |
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