two span beam subjected to shear and flexure only is reinforced as follows: Section @ midspan @ face supports Top bars 2-20mm 5-20mm Bottom bars 3-20mm 2-20mm Given Stirrup diameter: 10 mm concrete fc = 21 mpa steel rebar fy = 415 mpa stirrup fy = 275 mpa beam size b x h = 270 mm x 450 mm assume all bars laid out in single layer calculate the following: a) tensile steel ratio in positive bending moment at midspan (round off to 5 decimals)
two span beam subjected to shear and flexure only is reinforced as follows: Section @ midspan @ face supports Top bars 2-20mm 5-20mm Bottom bars 3-20mm 2-20mm Given Stirrup diameter: 10 mm concrete fc = 21 mpa steel rebar fy = 415 mpa stirrup fy = 275 mpa beam size b x h = 270 mm x 450 mm assume all bars laid out in single layer calculate the following: a) tensile steel ratio in positive bending moment at midspan (round off to 5 decimals)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
two span beam subjected to shear and flexure only is reinforced as follows:
Section | @ midspan | @ face supports |
Top bars | 2-20mm | 5-20mm |
Bottom bars | 3-20mm | 2-20mm |
Given
Stirrup diameter: 10 mm
concrete fc = 21 mpa
steel rebar fy = 415 mpa
stirrup fy = 275 mpa
beam size b x h = 270 mm x 450 mm
assume all bars laid out in single layer
calculate the following:
a) tensile steel ratio in positive bending moment at midspan (round off to 5 decimals)
b) design moment strength of section at midspan for positive bending ( in kN•m , nearest whole number)
c) nominal design strength of section at face of support for negative bending ( in kN•m , nearest whole number)
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