Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web Reinforcement
To accurately predict the shear-bearing capacity of UHPC beams, it is crucial to quantify the shear contribution of the fiber bridging effect and UHPC compression zone. Nevertheless, it should be noted that the shear contribution of UHPC in the compression zone is not fully considered in most existi...
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MDPI AG
2023-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/21/6915 |
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| author | Chuansong Gao Hui Jiang Gaozhan Zhang Liang Chen Yuqing Hu |
| author_facet | Chuansong Gao Hui Jiang Gaozhan Zhang Liang Chen Yuqing Hu |
| author_sort | Chuansong Gao |
| collection | DOAJ |
| description | To accurately predict the shear-bearing capacity of UHPC beams, it is crucial to quantify the shear contribution of the fiber bridging effect and UHPC compression zone. Nevertheless, it should be noted that the shear contribution of UHPC in the compression zone is not fully considered in most existing calculation methods, and the probability distribution of fibers within the matrix is also not taken into full account, which reduces the calculation accuracy of the shear bearing capacity of UHPC beams. In this paper, a UHPC beam shear test database containing 247 samples was created, and the influencing factors on the shear capacity of UHPC beams, such as the shear span ratio, the web reinforcement ratio, and the volume fraction of steel fiber, were analyzed. It was found that the ratio of cracking load to ultimate load ranges from 0.2 to 0.6, and the failure in the compression zone of UHPC beams can be divided into diagonal tension failure and shear compression failure. Based on the failure mechanism of the compression zone, considering the contribution of fiber micro tensile strength, a formula for calculating the shear-bearing capacity of UHPC beams with and without web reinforcement was proposed. Verified by experimental data, the proposed formula accurately predicts the shear-bearing capacity of UHPC beams. In comparison with other shear capacity formulas in current design codes, the proposed formula in this paper provides a higher prediction accuracy. |
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| id | doaj.art-378c014af82e4f2b981b80d0dec83f7f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T11:26:05Z |
| publishDate | 2023-10-01 |
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| spelling | doaj.art-378c014af82e4f2b981b80d0dec83f7f2023-11-10T15:07:19ZengMDPI AGMaterials1996-19442023-10-011621691510.3390/ma16216915Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web ReinforcementChuansong Gao0Hui Jiang1Gaozhan Zhang2Liang Chen3Yuqing Hu4BIM Engineering Center of Anhui Province, Anhui Jianzhu University, Hefei 230601, ChinaCollege of Civil Engineering, Xuzhou University of Technology, Xuzhou 221111, ChinaAdvanced Building Materials Key Laboratory of Anhui Province, Anhui Jianzhu University, Hefei 230022, ChinaCollege of Civil Engineering, Hefei University of Technology, Hefei 230009, ChinaBIM Engineering Center of Anhui Province, Anhui Jianzhu University, Hefei 230601, ChinaTo accurately predict the shear-bearing capacity of UHPC beams, it is crucial to quantify the shear contribution of the fiber bridging effect and UHPC compression zone. Nevertheless, it should be noted that the shear contribution of UHPC in the compression zone is not fully considered in most existing calculation methods, and the probability distribution of fibers within the matrix is also not taken into full account, which reduces the calculation accuracy of the shear bearing capacity of UHPC beams. In this paper, a UHPC beam shear test database containing 247 samples was created, and the influencing factors on the shear capacity of UHPC beams, such as the shear span ratio, the web reinforcement ratio, and the volume fraction of steel fiber, were analyzed. It was found that the ratio of cracking load to ultimate load ranges from 0.2 to 0.6, and the failure in the compression zone of UHPC beams can be divided into diagonal tension failure and shear compression failure. Based on the failure mechanism of the compression zone, considering the contribution of fiber micro tensile strength, a formula for calculating the shear-bearing capacity of UHPC beams with and without web reinforcement was proposed. Verified by experimental data, the proposed formula accurately predicts the shear-bearing capacity of UHPC beams. In comparison with other shear capacity formulas in current design codes, the proposed formula in this paper provides a higher prediction accuracy.https://www.mdpi.com/1996-1944/16/21/6915UHPC beamcracking modeshear capacitycompression zonefiber bridging effectfailure mechanism |
| spellingShingle | Chuansong Gao Hui Jiang Gaozhan Zhang Liang Chen Yuqing Hu Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web Reinforcement Materials UHPC beam cracking mode shear capacity compression zone fiber bridging effect failure mechanism |
| title | Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web Reinforcement |
| title_full | Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web Reinforcement |
| title_fullStr | Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web Reinforcement |
| title_full_unstemmed | Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web Reinforcement |
| title_short | Novel Calculation Method for the Shear Capacity of a UHPC Beam with and without Web Reinforcement |
| title_sort | novel calculation method for the shear capacity of a uhpc beam with and without web reinforcement |
| topic | UHPC beam cracking mode shear capacity compression zone fiber bridging effect failure mechanism |
| url | https://www.mdpi.com/1996-1944/16/21/6915 |
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