Abstract
In flexural strength design of normal-strength reinforced concrete (RC) members, the maximum concrete stress adopted by various design codes is originated from the scaled down uni-axial concrete stress-strain curve, in that the behaviour of concrete under flexure is wrongly considered to be more inferior than that under uni-axial compression. Therefore, from published literature, this scaled down concrete stress might be the reason for significant disparity between theoretical and actual flexural strengths. In this study, 12 test specimens, including plain concrete and RC, were fabricated to investigate the maximum concrete stress developed under flexure affected by strain gradient. These specimens were cast in several batches, each batch consisted of one concentrically loaded specimen and one or several eccentrically loaded specimen(s). The concrete stress-strain curve developed in each of the eccentrically loaded specimens was derived by modifying that of its counterpart concentrically loaded specimen b...
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