A load P will be supported by a structure consisting of a rigid bar ABCD, a polymer [E = 2,300 ksi; a= 2.9 x 10-6/°F] bar (1) and an aluminum alloy [E = 10,000 ksi; a = 12.5 x 10-6/°F] bar (2), as shown. Each bar has a cross-sectional area of 2.00 in.². The bars are unstressed when the structure is assembled at 30°F. After a concentrated load of P = 31 kips is applied and the temperature is increased to 100°F, determine the normal force in bar (1). 6 ft 2.5 ft O 3.74 kips O 4.77 kips (1) B 3 ft 8 ft 1.5 ft (2) D
A load P will be supported by a structure consisting of a rigid bar ABCD, a polymer [E = 2,300 ksi; a= 2.9 x 10-6/°F] bar (1) and an aluminum alloy [E = 10,000 ksi; a = 12.5 x 10-6/°F] bar (2), as shown. Each bar has a cross-sectional area of 2.00 in.². The bars are unstressed when the structure is assembled at 30°F. After a concentrated load of P = 31 kips is applied and the temperature is increased to 100°F, determine the normal force in bar (1). 6 ft 2.5 ft O 3.74 kips O 4.77 kips (1) B 3 ft 8 ft 1.5 ft (2) D
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![A load P will be supported by a structure consisting of a rigid bar ABCD, a polymer [E = 2,300 ksi; a= 2.9 x 10-6/°F] bar (1) and an
aluminum alloy [E = 10,000 ksi; a = 12.5 x 10-6/°F] bar (2), as shown. Each bar has a cross-sectional area of 2.00 in.². The bars are
unstressed when the structure is assembled at 30°F. After a concentrated load of P = 31 kips is applied and the temperature is
increased to 100°F, determine the normal force in bar (1).
6 ft
2.5 ft
O 3.74 kips
4.77 kips
(1)
B
3 ft
8 ft
1.5 ft
2
D](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5de16356-1e5c-4caf-8317-f436f8b1f1cd%2F9dfdf7df-8544-4e78-b4c2-bbbd770c8949%2Fesjthaw_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A load P will be supported by a structure consisting of a rigid bar ABCD, a polymer [E = 2,300 ksi; a= 2.9 x 10-6/°F] bar (1) and an
aluminum alloy [E = 10,000 ksi; a = 12.5 x 10-6/°F] bar (2), as shown. Each bar has a cross-sectional area of 2.00 in.². The bars are
unstressed when the structure is assembled at 30°F. After a concentrated load of P = 31 kips is applied and the temperature is
increased to 100°F, determine the normal force in bar (1).
6 ft
2.5 ft
O 3.74 kips
4.77 kips
(1)
B
3 ft
8 ft
1.5 ft
2
D
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