A reinforced concrete beam has a width of 30 mm and an overall depth of 480 mm. The beam is simply supported over a span of 5 m. Steel strength fy=415 Mpa and concrete strength f=28 Mpa. Concrete cover is 70 mm from the centroid of the steel area. Unit weight of concrete is 26 kN/m³. Other than the weight of the beam, the beam carries a superimposed dead load of 18 kN/ m and a live load of 14 kN/m. a.) Determine the maximum factored moment on the beam. b.) If the design ultimate moment capacity of the beam is 280 kN/m, determine the required number of 20 mm tension bars. c.) If the beam will carry a factored load of 240 kN at midspan, determine the required number of 20 mm tension bars.

A reinforced concrete beam has a width of 30 mm and an overall depth of 480 mm. The beam is simply supported over a span of 5 m. Steel strength fy=415 Mpa and concrete strength f=28 Mpa. Concrete cover is 70 mm from the centroid of the steel area. Unit weight of concrete is 26 kN/m³. Other than the weight of the beam, the beam carries a superimposed dead load of 18 kN/ m and a live load of 14 kN/m. a.) Determine the maximum factored moment on the beam. b.) If the design ultimate moment capacity of the beam is 280 kN/m, determine the required number of 20 mm tension bars. c.) If the beam will carry a factored load of 240 kN at midspan, determine the required number of 20 mm tension bars.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.

Question

A reinforced concrete beam has a width of 30 mm and an overall depth of 480 mm. The beam is simply
supported over a span of 5 m. Steel strength fy=415 Mpa and concrete strength fe=28 Mpa. Concrete
cover is 70 mm from the centroid of the steel area. Unit weight of concrete is 26 kN/m³. Other than the
weight of the beam, the beam carries a superimposed dead load of 18 kN/ m and a live load of 14 kN/m.
a.) Determine the maximum factored moment on the beam.
b.) If the design ultimate moment capacity of the beam is 280 kN/m, determine the required
number of 20 mm tension bars.
c.) If the beam will carry a factored load of 240 kN at midspan, determine the required number of.
20 mm tension bars.

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