A simply-supported reinforced concrete beam, 300 mm wide x 600 mm deep spans 8 m. Its fundamental natural frequency is measured to be 6.5 Hz. (a) In your opinion, is the beam cracked or uncracked? (b) Use a single degree-of-freedom (SDOF) system to represent the deflection at the center of the beam. Assume that 8/15 of the total mass of the beam contributes to the SDOF model. Take the density of reinforced concrete to be 24 kN/m³ and E = 30 kN/mm².
A simply-supported reinforced concrete beam, 300 mm wide x 600 mm deep spans 8 m. Its fundamental natural frequency is measured to be 6.5 Hz. (a) In your opinion, is the beam cracked or uncracked? (b) Use a single degree-of-freedom (SDOF) system to represent the deflection at the center of the beam. Assume that 8/15 of the total mass of the beam contributes to the SDOF model. Take the density of reinforced concrete to be 24 kN/m³ and E = 30 kN/mm².
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
![A simply-supported reinforced concrete beam, 300 mm wide x 600 mm deep spans 8 m. Its
fundamental natural frequency is measured to be 6.5 Hz. (a) In your opinion, is the beam cracked or
uncracked?
(b) Use a single degree-of-freedom (SDOF) system to represent the deflection at the center of the beam.
Assume that 8/15 of the total mass of the beam contributes to the SDOF model. Take the density
of reinforced concrete to be 24 kN/m³ and E = 30 kN/mm².](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff25a6f80-c9de-473d-acc3-f9056af964df%2F6915c75d-b353-49b1-a84a-1c9ff4a0594b%2F6m2i26a_processed.png&w=3840&q=75)
Transcribed Image Text:A simply-supported reinforced concrete beam, 300 mm wide x 600 mm deep spans 8 m. Its
fundamental natural frequency is measured to be 6.5 Hz. (a) In your opinion, is the beam cracked or
uncracked?
(b) Use a single degree-of-freedom (SDOF) system to represent the deflection at the center of the beam.
Assume that 8/15 of the total mass of the beam contributes to the SDOF model. Take the density
of reinforced concrete to be 24 kN/m³ and E = 30 kN/mm².
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