Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin Joints
Precast concrete segmental bridges (PCSBs) with hybrid tendons may be the most competitive solution for achieving the advantages of rapid construction and favorable structural performance. Therefore, the flexural behavior of precast concrete segmental bridges (PCSBs) with unbonded tendons and epoxy...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/7/1643 |
| _version_ | 1797590062241677312 |
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| author | Hui Zheng Daixing Chen Mingfu Ou Xuejiao Liang Yuan Luo |
| author_facet | Hui Zheng Daixing Chen Mingfu Ou Xuejiao Liang Yuan Luo |
| author_sort | Hui Zheng |
| collection | DOAJ |
| description | Precast concrete segmental bridges (PCSBs) with hybrid tendons may be the most competitive solution for achieving the advantages of rapid construction and favorable structural performance. Therefore, the flexural behavior of precast concrete segmental bridges (PCSBs) with unbonded tendons and epoxy joints was experimentally investigated in this study, and the effects of the joint types were recorded. Investigations were carried out on the ultimate loads, prestressed strand stresses, deflections, as well as failure modes, while an unbonded monolithic beam was tested for comparison. In addition, the strain measurement proved that the average strains agree with the assumption of plane section, regardless of whether the joints were set. The flexural strengths of prefabricated components were 9~15% lower than those of the monolithic beams with unbonded tendons. Meanwhile, the shape of the joints also influenced the flexural bearing capacity; the bearing capacity of the dual-tooth joint beam was 4.5% lower than that of the single-tooth one, and the bearing capacity of the flat butt joint member was 5.7% lower than that of the dual-tooth joint beam. Moreover, the experimental deflection curve and ultimate bearing capacity of the models with different shear keys showed a good correlation with the FE results. These research outcomes will aid in comprehending the roles of joints in the flexural behaviors of precast UHPC segmental bridges. |
| first_indexed | 2024-03-11T01:15:03Z |
| format | Article |
| id | doaj.art-e5fe115b562d46cfa49ba7e8bd851f6f |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T01:15:03Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-e5fe115b562d46cfa49ba7e8bd851f6f2023-11-18T18:36:45ZengMDPI AGBuildings2075-53092023-06-01137164310.3390/buildings13071643Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin JointsHui Zheng0Daixing Chen1Mingfu Ou2Xuejiao Liang3Yuan Luo4College of Civil Engineering, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Civil Engineering, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Civil Engineering, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Civil Engineering, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Civil Engineering, Hunan University of Technology, Zhuzhou 412007, ChinaPrecast concrete segmental bridges (PCSBs) with hybrid tendons may be the most competitive solution for achieving the advantages of rapid construction and favorable structural performance. Therefore, the flexural behavior of precast concrete segmental bridges (PCSBs) with unbonded tendons and epoxy joints was experimentally investigated in this study, and the effects of the joint types were recorded. Investigations were carried out on the ultimate loads, prestressed strand stresses, deflections, as well as failure modes, while an unbonded monolithic beam was tested for comparison. In addition, the strain measurement proved that the average strains agree with the assumption of plane section, regardless of whether the joints were set. The flexural strengths of prefabricated components were 9~15% lower than those of the monolithic beams with unbonded tendons. Meanwhile, the shape of the joints also influenced the flexural bearing capacity; the bearing capacity of the dual-tooth joint beam was 4.5% lower than that of the single-tooth one, and the bearing capacity of the flat butt joint member was 5.7% lower than that of the dual-tooth joint beam. Moreover, the experimental deflection curve and ultimate bearing capacity of the models with different shear keys showed a good correlation with the FE results. These research outcomes will aid in comprehending the roles of joints in the flexural behaviors of precast UHPC segmental bridges.https://www.mdpi.com/2075-5309/13/7/1643ultra-high-performance concrete (UHPC)precast concrete segmental bridges (PCSBs)epoxy resin jointsunbonded tendonflexural behavior |
| spellingShingle | Hui Zheng Daixing Chen Mingfu Ou Xuejiao Liang Yuan Luo Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin Joints Buildings ultra-high-performance concrete (UHPC) precast concrete segmental bridges (PCSBs) epoxy resin joints unbonded tendon flexural behavior |
| title | Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin Joints |
| title_full | Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin Joints |
| title_fullStr | Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin Joints |
| title_full_unstemmed | Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin Joints |
| title_short | Flexural Behavior of Precast UHPC Segmental Beams with Unbonded Tendons and Epoxy Resin Joints |
| title_sort | flexural behavior of precast uhpc segmental beams with unbonded tendons and epoxy resin joints |
| topic | ultra-high-performance concrete (UHPC) precast concrete segmental bridges (PCSBs) epoxy resin joints unbonded tendon flexural behavior |
| url | https://www.mdpi.com/2075-5309/13/7/1643 |
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