P02: The beam of Fig. 2 has a simple span of 20 ft and supports a dead load including its own weight of 1 klf and a live load of 0.7 klf. F'c = 3000 psi. (a) Calculate the instantaneous deflection for D + L. (b) Calculate the deflection assuming that 30% of the live load is continuously applied for three years.
P02: The beam of Fig. 2 has a simple span of 20 ft and supports a dead load including its own weight of 1 klf and a live load of 0.7 klf. F'c = 3000 psi. (a) Calculate the instantaneous deflection for D + L. (b) Calculate the deflection assuming that 30% of the live load is continuously applied for three years.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Subject is Reinforced Concrete Design
Transcribed Image Text:P02: The beam of Fig. 2 has a simple span of 20 ft and supports a dead load including its own weight of
1 klf and a live load of 0.7 klf. F'c = 3000 psi.
(a) Calculate the instantaneous deflection for D + L.
(b) Calculate the deflection assuming that 30% of the live load is continuously applied for three years.
17 in.
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3 #9
3 in.
12 in.-
20 in.
Figure 2 Beam Cross Section
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Step 1: Given variable parameter
VIEWStep 2: Determine critical moment for the beam
VIEWStep 3: Determination for deflection due to dead load and live load
VIEWStep 4: Determination of deflection due to dead load
VIEWStep 5: Determination of instantaneous deflection for 30% live load applied for 3 years.
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