A wooden beam is loaded by a distributed load w = 5 N/mm as shown in Q4(a). The cross-section of the beam is shown in Figure Q4(b). Assume th 1700 mm, LBC = 3300 mm, W=180 mm, Bọ = 20 mm, and H = 210 mm, Units: use N, mm, MPa as consistent units for all calculations. Decimal points: any decimal points are fine and all the numerical questic 10% error tolerance. Steps: Fill the gaps in the "steps" to get some marks from the working-ou Adaptive marking is still used.
A wooden beam is loaded by a distributed load w = 5 N/mm as shown in Q4(a). The cross-section of the beam is shown in Figure Q4(b). Assume th 1700 mm, LBC = 3300 mm, W=180 mm, Bọ = 20 mm, and H = 210 mm, Units: use N, mm, MPa as consistent units for all calculations. Decimal points: any decimal points are fine and all the numerical questic 10% error tolerance. Steps: Fill the gaps in the "steps" to get some marks from the working-ou Adaptive marking is still used.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A wooden beam is loaded by a distributed load w = 5 N/mm as shown in Figure
Q4(a). The cross-section of the beam is shown in Figure Q4(b). Assume that LAB =
1700 mm, LBC = 3300 mm, W=180 mm, Bo = 20 mm, and H = 210 mm, ho=20 mm.
Units: use N, mm, MPa as consistent units for all calculations.
Decimal points: any decimal points are fine and all the numerical questions have a
10% error tolerance.
Steps: Fill the gaps in the "steps" to get some marks from the working-out process.
Adaptive marking is still used.
(a)
(b)
hol
Bo
H
A
ア ア
B
ケ
LAB
LBC
Cross-section
W
Figure Q4: (a) A wooden beam is loaded by a distributed load, (b) cross-section of
the beam.
Transcribed Image Text:f) Determine the maximum bending stress and shear stress that occurs in the
beam.
Maximum bending stress
MPa
Maximum shear stress
MPa
Bending stress equation
Write down equation to calculate the maximum bending stress:
Definition of variables: maximum moment is Mm, 2nd moment of area Io,
maxium distance from the netural plane y.
Shear stress equation
Write down the shear stress equation:
The definition of the variables are: Shear force V, 1st moment of Area Q,
2nd moment of area Io, width of cross-section feature t.
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