https://scholars.lib.ntu.edu.tw/handle/123456789/630557
標題: | Maximum Shear Strength of Reinforced Concrete Beams | 作者: | SHYH-JIANN HWANG Yang, Yu Hsuan Li, Yi An |
關鍵字: | force-transfer mechanism | maximum shear strength | shear failure mode | softened concrete strength | 公開日期: | 1-三月-2022 | 出版社: | AMER CONCRETE INST | 卷: | 119 | 期: | 2 | 起(迄)頁: | 19 | 來源出版物: | ACI Materials Journal | 摘要: | Current codes limit the maximum shear strength in reinforced concrete beams to prevent possible sudden shear failure due to over-reinforcement. The ACI 318-19 limit is criticized to be over-conservative, especially for high-strength concrete beams. Based on the force-transfer mechanism of the beams, this paper investigates this issue by deriving a model to determine the shear strength of rectangular beams with a shear span-depth ratio exceeding 2. According to the proposed model, it is found that there are two influential parameters of the maximum shear strength for beams-that is, concrete strength and longitudinal tension reinforcement. Considering the softening phenomenon of reinforced concrete, the use of √fc' in the ACI 318-19 limiting equation seems appropriate for high-strength concrete beams. However, the ACI 318-19 limit on the maximum shear strength of beams seems conservative for beams with a larger amount of longitudinal tension reinforcement. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/630557 | ISSN: | 0889325X | DOI: | 10.14359/51734375 |
顯示於: | 土木工程學系 |
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