Answer to Question #201341 in Civil and Environmental Engineering for ABHINAV SINGH

Question #201341

A free-standing rectangular beam with cross-sectional width b = 250 mm and a span of 6.5 m is loaded with dead load (including dead weight) = 29 kN / m and payload = 35 kN / m. The payload has no long-term share.

a) Determine the dimensioning field moment of the beam in the ultimate limit state.

b) Select normal reinforced cross section. Determine the cross-sectional height and reinforcement quantities when it is stated that the beam is to be pressure-reinforced for 30% of the design moment. Show geometry and reinforcement on a sketch of the cross section.

c) Sketch the strain state of the cross section and check that the pressure reinforcement flows.

d) A deflection requirement in the service limit state of L / 400 has been stated. Calculate the maximum deflection in the life of the beam and compare with the requirement, disregarding the effect of shrinkage on deflection.

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