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.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

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.
3 #9
12 in.-
17 in.
3 in.
20 in.
Figure 2 Beam Cross Section

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Step 1: Given variable parameter

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Step 2: Determine critical moment for the beam

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Step 3: Determination for deflection due to dead load and live load

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Step 4: Determination of deflection due to dead load

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Step 5: Determination of instantaneous deflection for 30% live load applied for 3 years.

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