Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete
Steel-concrete composite slabs, as efficient modern structural components, can incorporate coarse recycled aggregates (CRA) and fine recycled aggregates (FRA) as green alternatives to sand and gravel. However, existing studies have not sufficiently investigated the effects of recycled coarse and fin...
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525006400 |
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| author | Jiongzhuo Bai Yue Geng Yu-Yin Wang Charles K.S. Moy Huan Zhang |
| author_facet | Jiongzhuo Bai Yue Geng Yu-Yin Wang Charles K.S. Moy Huan Zhang |
| author_sort | Jiongzhuo Bai |
| collection | DOAJ |
| description | Steel-concrete composite slabs, as efficient modern structural components, can incorporate coarse recycled aggregates (CRA) and fine recycled aggregates (FRA) as green alternatives to sand and gravel. However, existing studies have not sufficiently investigated the effects of recycled coarse and fine aggregates as well as loading history on the longitudinal shear capacity of composite slabs, and the applicability of current design methods specified in existing codes for recycled aggregate concrete (RAC) composite slabs has yet to be systematically validated. Therefore, this study systematically investigates recycled aggregates (RAs) composite slabs through experimental testing and numerical modeling. Three full-scale specimens with closed steel decking were tested under varying RAs replacement ratios (coarse/fine aggregates) and sustained load durations (0–500 days). A validated finite element (FE) model incorporating interfacial bond-slip behavior was developed, enabling 136 parametric simulations to assess m-k and partial shear connection (PSC) approaches following Eurocode 4. The results show: (1) RAs incorporation reduces initial stiffness and cracking load by 14.3 % and 27.1 %, respectively, but negligibly affects ultimate shear capacity; (2) 500-day sustained loading enhances shear capacity, stiffness, and cracking load by 9.3 %, 26.3 %, and 16.1 % through concrete aging; (3) Both Eurocode 4 methods demonstrate satisfactory applicability for RAs composite slab design. These results provide critical validation for sustainable composite slab engineering using recycled materials. |
| format | Article |
| id | doaj-art-2319450e2c304da6bdc7fbff8aa973e5 |
| institution | DOAJ |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-2319450e2c304da6bdc7fbff8aa973e52025-08-20T03:20:22ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0484210.1016/j.cscm.2025.e04842Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concreteJiongzhuo Bai0Yue Geng1Yu-Yin Wang2Charles K.S. Moy3Huan Zhang4School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, ChinaKey Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China; Guangdong Provincial Key Laboratory of Modern Civil Engineering Technology, Guangzhou 510641, China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning, Guangxi 530004, China; Correspondence to: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China.Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, ChinaDepartment of Civil Engineering, Xi’an Jiaotong-Liverpool University, Suzhou 215123, ChinaKey Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, ChinaSteel-concrete composite slabs, as efficient modern structural components, can incorporate coarse recycled aggregates (CRA) and fine recycled aggregates (FRA) as green alternatives to sand and gravel. However, existing studies have not sufficiently investigated the effects of recycled coarse and fine aggregates as well as loading history on the longitudinal shear capacity of composite slabs, and the applicability of current design methods specified in existing codes for recycled aggregate concrete (RAC) composite slabs has yet to be systematically validated. Therefore, this study systematically investigates recycled aggregates (RAs) composite slabs through experimental testing and numerical modeling. Three full-scale specimens with closed steel decking were tested under varying RAs replacement ratios (coarse/fine aggregates) and sustained load durations (0–500 days). A validated finite element (FE) model incorporating interfacial bond-slip behavior was developed, enabling 136 parametric simulations to assess m-k and partial shear connection (PSC) approaches following Eurocode 4. The results show: (1) RAs incorporation reduces initial stiffness and cracking load by 14.3 % and 27.1 %, respectively, but negligibly affects ultimate shear capacity; (2) 500-day sustained loading enhances shear capacity, stiffness, and cracking load by 9.3 %, 26.3 %, and 16.1 % through concrete aging; (3) Both Eurocode 4 methods demonstrate satisfactory applicability for RAs composite slab design. These results provide critical validation for sustainable composite slab engineering using recycled materials.http://www.sciencedirect.com/science/article/pii/S2214509525006400Steel-concrete composite slabRecycled aggregateLoading historyLongitudinal shearBearing capacity |
| spellingShingle | Jiongzhuo Bai Yue Geng Yu-Yin Wang Charles K.S. Moy Huan Zhang Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete Case Studies in Construction Materials Steel-concrete composite slab Recycled aggregate Loading history Longitudinal shear Bearing capacity |
| title | Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete |
| title_full | Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete |
| title_fullStr | Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete |
| title_full_unstemmed | Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete |
| title_short | Longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete |
| title_sort | longitudinal shear behavior of composite slabs with recycled coarse and fine aggregate concrete |
| topic | Steel-concrete composite slab Recycled aggregate Loading history Longitudinal shear Bearing capacity |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525006400 |
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