Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams
Macro diagonal cracks can significantly reduce the stiffness of slender reinforced concrete (RC) beams, which results in excessive deflection compared with limitations from design specifications. To evaluate the post-cracking stiffness of slender RC beams with diagonal cracks, a shear degradation mo...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/11/2814 |
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| author | Kaiqi Zheng Siwen Ni Yaohui Zhang Junxuan Gu Mingming Gao Yang Wei |
| author_facet | Kaiqi Zheng Siwen Ni Yaohui Zhang Junxuan Gu Mingming Gao Yang Wei |
| author_sort | Kaiqi Zheng |
| collection | DOAJ |
| description | Macro diagonal cracks can significantly reduce the stiffness of slender reinforced concrete (RC) beams, which results in excessive deflection compared with limitations from design specifications. To evaluate the post-cracking stiffness of slender RC beams with diagonal cracks, a shear degradation model that considers shear deformation is proposed. Based on the variable angle truss model, this study deduced the strut angle formula based on the minimum energy principle. Then, the relationship between the stirrup yielding shear stiffness and elastic shear stiffness was modeled. Finally, the calculation procedure was developed by quantifying the stiffness degradation tendency. The comparison between the experimental results of deflection and the proposed analytical method showed good agreement. Additionally, the proposed method can capture the full-range features of shear strain curves. |
| first_indexed | 2024-03-09T16:58:02Z |
| format | Article |
| id | doaj.art-d09adb0eef354418b92b5ae9c93a3a1b |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T16:58:02Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-d09adb0eef354418b92b5ae9c93a3a1b2023-11-24T14:33:29ZengMDPI AGBuildings2075-53092023-11-011311281410.3390/buildings13112814Post-Cracking Shear Stiffness Model of Reinforced Concrete BeamsKaiqi Zheng0Siwen Ni1Yaohui Zhang2Junxuan Gu3Mingming Gao4Yang Wei5College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, ChinaCollege of Civil Engineering, Nanjing Forestry University, Nanjing 210037, ChinaState Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, ChinaCollege of Civil Engineering, Nanjing Forestry University, Nanjing 210037, ChinaCollege of Civil Engineering, Nanjing Forestry University, Nanjing 210037, ChinaCollege of Civil Engineering, Nanjing Forestry University, Nanjing 210037, ChinaMacro diagonal cracks can significantly reduce the stiffness of slender reinforced concrete (RC) beams, which results in excessive deflection compared with limitations from design specifications. To evaluate the post-cracking stiffness of slender RC beams with diagonal cracks, a shear degradation model that considers shear deformation is proposed. Based on the variable angle truss model, this study deduced the strut angle formula based on the minimum energy principle. Then, the relationship between the stirrup yielding shear stiffness and elastic shear stiffness was modeled. Finally, the calculation procedure was developed by quantifying the stiffness degradation tendency. The comparison between the experimental results of deflection and the proposed analytical method showed good agreement. Additionally, the proposed method can capture the full-range features of shear strain curves.https://www.mdpi.com/2075-5309/13/11/2814reinforced concrete beamshear crackstiffness modelshear deformationstrut anglevariable angle truss model |
| spellingShingle | Kaiqi Zheng Siwen Ni Yaohui Zhang Junxuan Gu Mingming Gao Yang Wei Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams Buildings reinforced concrete beam shear crack stiffness model shear deformation strut angle variable angle truss model |
| title | Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams |
| title_full | Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams |
| title_fullStr | Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams |
| title_full_unstemmed | Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams |
| title_short | Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams |
| title_sort | post cracking shear stiffness model of reinforced concrete beams |
| topic | reinforced concrete beam shear crack stiffness model shear deformation strut angle variable angle truss model |
| url | https://www.mdpi.com/2075-5309/13/11/2814 |
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