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Reinforced Concrete Beam - athena.ecs.csus.edu

1 jkmMechanics of MaterialsMechanics of MaterialsReinforced Concrete BeamReinforced Concrete BeamConcrete Beam2 jkmConcrete BeamConcrete beam We will examine a Concrete beam in bending A Concrete beam is what we call a composite beam It is made of two materials: Concrete and steel Concrete is also a composite2P2P2 Concrete Beam3 jkmConcrete beam TestConcrete beam Test Loading Maximum Moment is in the center region2P 2PV12 PLML1L12PL2P2P2 PConcrete Beam4 jkmConcrete StrengthConcrete Strength We determine the compressive strength of Concrete with a Concrete cylinder test Cylinders are typically 6 inches in diameter 12 inches long We want the stress-strain results so we measure load and change in length3 Concrete Beam5 jkmConcrete Cylinder TestConcrete Cylinder TestConcrete Beam6 jkmConcrete Stress StrainConcrete Stress

Concrete Beam 35 ©jkm Shear Failure The beam may fail due to excessive shear stresses (i.e., diagonal tension), if the shear capacity of the beam is less than its flexural capacity The average shear stress at which a diagonal tension crack forms depends on the presence of flexural stresses There is a lot of scatter in the data that

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