5.21 Determine the amount of reinforcing steel required for each T beam in the accompanying illustration iff, - 60,000 psi. f-4000 psi, simple span - 20 ft, M, -200 ft-k (includes effect of concrete weight), and M, 500 ft-k. (Ams. 8.11 in.) 30 in ++ + + ft 0 in 420in -480 in

5.21 Determine the amount of reinforcing steel required for each T beam in the accompanying illustration iff, - 60,000 psi. f-4000 psi, simple span - 20 ft, M, -200 ft-k (includes effect of concrete weight), and M, 500 ft-k. (Ams. 8.11 in.) 30 in ++ + + ft 0 in 420in -480 in

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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Concept explainers

Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.

Question

5.21
Determine the amount of reinforcing steel required for each T beam in the accompanying illustration if f = 60,000 psi,
f=4000 psi, simple span=20 ft. M, -200 ft-k (includes effect of concrete weight), and M, 500 ft-k. (Axs. 8.11 in.)
30 in.
4 ft 0 in
-4 ft 0 in.
40 in
-4 ft 0 in.

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Step 1 Calculate the effective width

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Step 2 Find Nominal moment strength

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Step 3 Calculate the trial area of the steel

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Step 4 Check for values of a and Z

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Step 5 Find Amount of steel reinforcing required

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