reinforced concrete beam has a width of 300 mm and an overall depth of 510 mm. The beam is simply supported over a span of 5.3 m. Steel strength fy = 415 MPa and concrete strength fc’ = 28 MPa. Concrete cover is 70 mm from the centroid of the steel area. Unit weight of concrete is 23.5 kN/m3. Other than the weight of the beam, the beam carries a superimposed dead load of 19 kN/m and a live load of 15 kN/m. Use U = 1.2D + 1.6L at ultimate condition. 1. Determine the maximum factored moment on the beam. 2. Determine the required number of 20 mm tension bars. 3. If the beam will carry an additional factored load of 20 kN at midspan, determine the required number of 25 mm tension bars.
reinforced concrete beam has a width of 300 mm and an overall depth of 510 mm. The beam is simply supported over a span of 5.3 m. Steel strength fy = 415 MPa and concrete strength fc’ = 28 MPa. Concrete cover is 70 mm from the centroid of the steel area. Unit weight of concrete is 23.5 kN/m3. Other than the weight of the beam, the beam carries a superimposed dead load of 19 kN/m and a live load of 15 kN/m. Use U = 1.2D + 1.6L at ultimate condition. 1. Determine the maximum factored moment on the beam. 2. Determine the required number of 20 mm tension bars. 3. If the beam will carry an additional factored load of 20 kN at midspan, determine the required number of 25 mm tension bars.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A reinforced concrete beam has a width of 300 mm and an overall depth of 510 mm. The beam is simply supported over a span of 5.3 m. Steel strength fy = 415 MPa and concrete strength fc’ = 28 MPa. Concrete cover is 70 mm from the centroid of the steel area. Unit weight of concrete is 23.5 kN/m3. Other than the weight of the beam, the beam carries a superimposed dead load of 19 kN/m and a live load of 15 kN/m. Use U = 1.2D + 1.6L at ultimate condition.
1. Determine the maximum factored moment on the beam.
2. Determine the required number of 20 mm tension bars.
3. If the beam will carry an additional factored load of 20 kN at midspan, determine the required number of 25 mm tension bars.
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