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Punching Shear Strength Model for Reinforced Concrete Flat Slabs with Openings
| 题名： | Punching Shear Strength Model for Reinforced Concrete Flat Slabs with Openings |
| 正文语种： | eng |
| 作者： | Marques, Marilia G.;Liberati, Elyson A. P.;Gomes, Ronaldo B.;Carvalho, Alessandra L.;Trautwein, Leandro M. |
| 作者单位： | Univ Fed Vicosa Inst Exact Sci & Technol BR-38810000 Rio Paranaiba Brazil;Univ Estadual Maringa Dept Civil Engn BR-87020900 Maringa Parana Brazil;Univ Fed Goias Sch Civil Engn BR-74605220 Goiania Go Brazil;Pontifical Catholic Univ Goias Dept Engn Sch Civil Engn BR-74605010 Goiania Go Brazil;Univ Estadual Campinas Sch Civil Engn Architecture & Urban Design BR-13083889 Campinas SP Brazil |
| 关键词： | Reinforced concrete;Punching shear;Criteria of failure |
| 摘要： | A theoretical model is proposed to analyze the punching shear resistance in flat slabs of reinforced concrete in the presence of openings and stud-type shear reinforcement. Openings in flat slabs reduce resistance to punching. The magnitude of the loss of strength is influenced by the quantity, size, and position of the opening in the slab. The theoretical method presented in this work describes that once a load is applied onto the slab, a rotation occurs, giving rise to seven forces. These forces are related to the concrete and the flexural and shear reinforcement. The failure load is calculated by finding the solution of nonlinear equations developed from horizontal, vertical, and rotational balance of these forces. The failure criterion of these slabs with shear reinforcement was classified as internal or external to the shear reinforcement. The results showed theoretical breaking loads similar to those obtained experimentally, with a maximum variation of 7%. (C) 2021 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 7 |
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