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Structural Concrete - Hassoun

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5.3 Behavior of Beams without Shear Reinforcement 191<br />

Figure 5.4 (a) Forces and stresses along depth of section, (b) normal and shear<br />

stresses, (c) pure shear, and (d) diagonal tension.<br />

The shear failure in a concrete beam is most likely to occur where shear forces are at maximum,<br />

generally near the supports of the member. The first evidence of impending failure is the<br />

formation of diagonal cracks.<br />

5.3 BEHAVIOR OF BEAMS WITHOUT SHEAR REINFORCEMENT<br />

<strong>Concrete</strong> is weak in tension, and the beam will collapse if proper reinforcement is not provided.<br />

The tensile stresses develop in beams due to axial tension, bending, shear, torsion, or a combination

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