A reinforced concrete beam is 300mm wide and 500mm deep. The beam is cantilever over a span of 3m and carries uniform deadload of 10 kN/m including its own weight and a uniform liveload of 5 kN/m. The beam is reinforced for tension only with 3-28 mm diameter bars with an effective depth of 420mm, f'c=28 MPa, and fy=415 MPa. a. Calculate the maximum instantaneous deflection due to service loads. b. Calculate the deflection for the same loads after 5 years assuming 50% of the liveload is sustained.
A reinforced concrete beam is 300mm wide and 500mm deep. The beam is cantilever over a span of 3m and carries uniform deadload of 10 kN/m including its own weight and a uniform liveload of 5 kN/m. The beam is reinforced for tension only with 3-28 mm diameter bars with an effective depth of 420mm, f'c=28 MPa, and fy=415 MPa. a. Calculate the maximum instantaneous deflection due to service loads. b. Calculate the deflection for the same loads after 5 years assuming 50% of the liveload is sustained.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A reinforced concrete beam is 300mm wide and 500mm deep.
The beam is cantilever over a span of 3m and carries uniform
deadload of 10 kN/m including its own weight and a uniform
liveload of 5 kN/m. The beam is reinforced for tension only
with 3-28 mm diameter bars with an effective depth of 420mm,
f'c-28 MPa, and fy=415 MPa.
a. Calculate the maximum instantaneous deflection due to
service loads.
b. Calculate the deflection for the same loads after 5 years
assuming 50% of the liveload is sustained.
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