Analytical Stress–Strain model for steel spirals-confined UHPC
Ultra-high performance fiber reinforced concrete (UHPFRC), which for short is commonly referred to as ultra-high performance concrete (UHPC) is an advanced cementitious composite material with superior mechanical properties that could transform future structural design. This paper presents a new com...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-07-01
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| Series: | Composites Part C: Open Access |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666682021000256 |
| _version_ | 1818597280487309312 |
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| author | Negar Naeimi Mohamed A. Moustafa |
| author_facet | Negar Naeimi Mohamed A. Moustafa |
| author_sort | Negar Naeimi |
| collection | DOAJ |
| description | Ultra-high performance fiber reinforced concrete (UHPFRC), which for short is commonly referred to as ultra-high performance concrete (UHPC) is an advanced cementitious composite material with superior mechanical properties that could transform future structural design. This paper presents a new comprehensive analytical stress-strain model for confined UHPC with steel spirals, which could be readily implemented in analytical studies to enable and expand structural design of future UHPC axial members such as columns. The validity of several existing confinement models for normal strength, high strength, and fiber reinforced concrete was evaluated first for predicting the uniaxial compressive behavior of UHPC. The evaluation results indicated the need to develop a unique confinement model for UHPC, which was pursued in this study. The proposed model was calibrated and validated using material tests data from about 100 UHPC specimens with varied volumetric ratios of steel fibers and spirals. Thus, the model accounts for combined confinement effects of steel fibers and spirals on compression behavior of UHPC. The developed model was further evaluated using additional experimental data and was shown to adequately represent the uniaxial compressive behavior and full stress-strain curves of both unconfined and confined UHPC with transverse reinforcement. |
| first_indexed | 2024-12-16T11:45:18Z |
| format | Article |
| id | doaj.art-48ca6829feb146aca2e45a337655ed7c |
| institution | Directory Open Access Journal |
| issn | 2666-6820 |
| language | English |
| last_indexed | 2024-12-16T11:45:18Z |
| publishDate | 2021-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Composites Part C: Open Access |
| spelling | doaj.art-48ca6829feb146aca2e45a337655ed7c2022-12-21T22:32:50ZengElsevierComposites Part C: Open Access2666-68202021-07-015100130Analytical Stress–Strain model for steel spirals-confined UHPCNegar Naeimi0Mohamed A. Moustafa1Department of Civil and Environmental Engineering, University of Nevada, Reno 89523-0258, NV, United StatesCorresponding author.; Department of Civil and Environmental Engineering, University of Nevada, Reno 89523-0258, NV, United StatesUltra-high performance fiber reinforced concrete (UHPFRC), which for short is commonly referred to as ultra-high performance concrete (UHPC) is an advanced cementitious composite material with superior mechanical properties that could transform future structural design. This paper presents a new comprehensive analytical stress-strain model for confined UHPC with steel spirals, which could be readily implemented in analytical studies to enable and expand structural design of future UHPC axial members such as columns. The validity of several existing confinement models for normal strength, high strength, and fiber reinforced concrete was evaluated first for predicting the uniaxial compressive behavior of UHPC. The evaluation results indicated the need to develop a unique confinement model for UHPC, which was pursued in this study. The proposed model was calibrated and validated using material tests data from about 100 UHPC specimens with varied volumetric ratios of steel fibers and spirals. Thus, the model accounts for combined confinement effects of steel fibers and spirals on compression behavior of UHPC. The developed model was further evaluated using additional experimental data and was shown to adequately represent the uniaxial compressive behavior and full stress-strain curves of both unconfined and confined UHPC with transverse reinforcement.http://www.sciencedirect.com/science/article/pii/S2666682021000256Ultra-high performance concreteSteel fibersSpiral reinforcementStress-strain relationshipsConfinement models |
| spellingShingle | Negar Naeimi Mohamed A. Moustafa Analytical Stress–Strain model for steel spirals-confined UHPC Composites Part C: Open Access Ultra-high performance concrete Steel fibers Spiral reinforcement Stress-strain relationships Confinement models |
| title | Analytical Stress–Strain model for steel spirals-confined UHPC |
| title_full | Analytical Stress–Strain model for steel spirals-confined UHPC |
| title_fullStr | Analytical Stress–Strain model for steel spirals-confined UHPC |
| title_full_unstemmed | Analytical Stress–Strain model for steel spirals-confined UHPC |
| title_short | Analytical Stress–Strain model for steel spirals-confined UHPC |
| title_sort | analytical stress strain model for steel spirals confined uhpc |
| topic | Ultra-high performance concrete Steel fibers Spiral reinforcement Stress-strain relationships Confinement models |
| url | http://www.sciencedirect.com/science/article/pii/S2666682021000256 |
| work_keys_str_mv | AT negarnaeimi analyticalstressstrainmodelforsteelspiralsconfineduhpc AT mohamedamoustafa analyticalstressstrainmodelforsteelspiralsconfineduhpc |