Question: A rectangular reinforced concrete beam with width b = 3 0 0 m m , and effectiv e depth of d = 5 3 0

A rectangular reinforced concrete beam with width b=300mm, and effectiv e depth of d=530mm, and a total depth of h=600mm is reinforced with th ree No.36(31006mm2) bars. The concrete compressive strength, modulus of rupture, and steel yielding strength are fc'=28MPa,fr=3.6MPa and fy=420 MPa . The elastic moduli of steel and modulus ratio are Es=200,000MPa and n=8.
(1) Find the maximum service load moment that can be resisted without stressing the concrete beyond 0.4f', or the steel beyond 0.3fr2.
(2) Determine whether the beam will crack before reaching the service load.
(3) Determine a failure mode, tension- or compression-controlled.
(4) Determine the nominal strength for the beam. Use =favfc'=0.72,=0.425
(5) Compute the design strength.
*Given equation : Parameters k and j for elastic, cracked section beam analysis, where k=2n+(n)22-n,j=1-13k
A rectangular reinforced concrete beam with width

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