A composite beam made of steel and bronze has the cross section shown. The cross-sectional dimensions are b, - 0.9 in, b2 - 2.7 in., and d - 1.8 in. The elastic modulus of the steel is E, - 30,000 ksi, and its allowable bending stress is 17 ksi. The elastic modulus of the bronze is E2 - 15,000 ksi, and its allowable bending stress is 14 ksi. Calculate the allowable bending moment that can be applied about the z centroidal axis. Bronze (2) Steel (1) b2

Structural Analysis
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Chapter2: Loads On Structures
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A composite beam made of steel and bronze has the cross section shown. The cross-sectional dimensions are b, - 0.9 in, bz - 2.7 in.,
and d- 1.8 in. The elastic modulus of the steel is E, - 30,000 ksi, and its allowable bending stress is 17 ksi. The elastic modulus of the
bronze is E2 - 15,000 ksi, and its allowable bending stress is 14 ksi. Calculate the allowable bending moment that can be applied about
the z centroidal axis.
Bronze (2)
d
Steel
(1)
bị
b2
Transcribed Image Text:A composite beam made of steel and bronze has the cross section shown. The cross-sectional dimensions are b, - 0.9 in, bz - 2.7 in., and d- 1.8 in. The elastic modulus of the steel is E, - 30,000 ksi, and its allowable bending stress is 17 ksi. The elastic modulus of the bronze is E2 - 15,000 ksi, and its allowable bending stress is 14 ksi. Calculate the allowable bending moment that can be applied about the z centroidal axis. Bronze (2) d Steel (1) bị b2
Assume the transformed steel section reaches its allowable bending stress first. Calculate the magnitude of the allowable bending
moment that can be applied in this case.
Answer:
M-
i
Ib-in.
Transcribed Image Text:Assume the transformed steel section reaches its allowable bending stress first. Calculate the magnitude of the allowable bending moment that can be applied in this case. Answer: M- i Ib-in.
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