Blog

A beam has dimensions of b = 14 in., h = 24 in., and d = 21.5 in. and is reinforced with 4 No. 6 bars. The concrete strength is 10,000 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 0.887395 in. and the strain in the reinforcement is εs = 0.044245, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

Isolated beams with unsymmetrical cross sections cannot deflect vertically and laterally at the same time.

A simply supported beam with dimensions of b = 18 in., h = 26 in., d = 23.5 in., and L = 22 ft supports a uniform service (unfactored) dead load consisting of its own weight plus 1.2 kips/ft and a uniform service (unfactored) live load of 1.5 kips/ft. The concrete is normal-weight concrete. Determine the moment due to the factored loads, Mu.      

Determine β1 given that f’c = 9,400 psi.

15. How is FDG trapped in the cell?

A one-way slab is assumed to act as a series of parallel, independent 1-ft wide strips of slab, continuous over the supporting beams.

Which symbol represents the cross-sectional area of the reinforcement on the compression side of a reinforced concrete beam?

ACI Code Section 22.2.2.1 specifies a limiting compressive strain, εcu, equal to _____.

A classmate has suggested a beam design that has dimensions of b = 12 in., h = 24 in., and d = 21.5 in. and is reinforced with 4 No. 7 bars. Assuming a cover of 1.5 in. and a stirrup diameter of 0.5 in., does the reinforcement fit within a single row as suggested?

A beam has dimensions of b = 14 in., h = 26 in., and d = 23.5 in. and is reinforced with 3 No. 8 bars. The concrete strength is 6,400 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the nominal moment capacity, Mn, of the beam.