In case of deep beam or in thin webbed R.C.C members, the first crack formed is-
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A.
Flexural crack
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B.
Diagonal crack due to compression
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C.
Shear crack
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D.
Diagonal crack due to tension
Correct Answer:
A. Flexural crack
Explanation:
In deep beams or reinforced concrete members with thin webs, the initial crack typically appears as a flexural crack. These vertical cracks develop at the bottom of the beam within the mid-span region, where the bending moment is at its peak and the tensile stress exceeds the concrete's capacity. As loading increases, these initial flexural cracks may transition into inclined diagonal cracks due to the combination of shear and flexural stresses.
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