4-87 Nine 4-in.-diameter steel (E = 30,000 ksi) rein-forcing bars were used when the short concrete (E =4500 ksi) pier shown in Fig. P4-87 was constructed.After a load P of 150 kip was applied to the pier, thetemperature increased 100°F. The coefficients of ther-mal expansion for steel and concrete are 6.6(106)/°Fand 6.0(106)/°F, respectively. Determine(a) The normal stresses in the concrete and in the steelbars after the temperature increases.(b) The change in length of the pier resulting from thecombined effects of the temperature change and theload.10 in.10 in.P = 150 kipRigid cap24 in.

Given: The diameter of the steel is, d=34=0.75 in. The Young's modulus for steel is, Es=30000…

Answered: normal stresses in the concrete and in…

Engineering

Mechanical Engineering

normal stresses in the concrete and in the

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Pressure Vessels

The term pressure vessel refers to a closed container that contains gas or liquid at a different pressure than environment pressure. The pressure vessels have a wide scale of applications in our day-to-day lives and other industrial places. Some common examples of pressure vessels are gas cylinders, autoclaves, compressor vessels, etc.

Question

4-87 Nine 4-in.-diameter steel (E = 30,000 ksi) rein-
forcing bars were used when the short concrete (E =
4500 ksi) pier shown in Fig. P4-87 was constructed.
After a load P of 150 kip was applied to the pier, the
temperature increased 100°F. The coefficients of ther-
mal expansion for steel and concrete are 6.6(106)/°F
and 6.0(106)/°F, respectively. Determine
(a) The normal stresses in the concrete and in the steel
bars after the temperature increases.
(b) The change in length of the pier resulting from the
combined effects of the temperature change and the
load.
10 in.
10 in.
P = 150 kip
Rigid cap
24 in.

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