two span beam subjected to shear and flexure only is reinforced as follows: SECTION @ MIDSPAN @ FACE OF SUPPORTS TOP BARS 2-∅20 mm 5-∅20 mm BOTTOM BARS 3-∅20 mm 2-∅20 mm
two span beam subjected to shear and flexure only is reinforced as follows: SECTION @ MIDSPAN @ FACE OF SUPPORTS TOP BARS 2-∅20 mm 5-∅20 mm BOTTOM BARS 3-∅20 mm 2-∅20 mm
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A two span beam subjected to shear and flexure only is reinforced as follows:
|
SECTION |
@ MIDSPAN |
@ FACE OF SUPPORTS |
|
TOP BARS |
2-∅20 mm |
5-∅20 mm |
|
BOTTOM BARS |
3-∅20 mm |
2-∅20 mm |
Given:
Stirrup diameter, ds = 10 mm
Concrete f'c = 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:
Tensile steel ratio in positive bending at midspan = __________
(in 5 decimal places)
Design Moment strength of section at midspan for positive bending = ___________
kN·m (nearest whole number)
Nominal Moment strength of section at face of support for negative bending = ___________
kN·m (nearest whole number)
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