SHYH-JIANN HWANGYang, Yu HsuanYu HsuanYangLi, Yi AnYi AnLi2023-04-252023-04-252022-03-010889325Xhttps://scholars.lib.ntu.edu.tw/handle/123456789/630557Current 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.force-transfer mechanism | maximum shear strength | shear failure mode | softened concrete strength[SDGs]SDG11journal article10.14359/517343752-s2.0-85134800678WOS:000819740500002https://api.elsevier.com/content/abstract/scopus_id/85134800678