17-18. A horizontal steel rod, 3.2 m long and 1200 mm² in cross-sectional area is secured between two walls. If the rod is stress free 30°C, compute the stress when the temperature has dropped to -15°C. Use a = 11.7 x 10 mm/mm*C and E = 200 GP₂. What is the stress assuming the walls are rigid? D. 46.80 MPa Cs Scennzeith Cara comer C. 35.10 MPa What is the stress assuming the walls yield(moves) by 0.45mm? A. 6.98 MPa B. 18.68 MPa C. 36.42 MPa D. 53.78 MPa

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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17-18. A horizontal steel rod, 3.2 m long and 1200 mm² in cross-sectional area is secured between two walls. If the rod is stress free
30°C, compute the stress when the temperature has dropped to -15°C. Use a = 11.7 x 10° mm/mm°C and E = 200 GPa.
What is the stress assuming the walls are rigid?
Ina
D. 46.80 MPa
Cs Scenozoith Cars
C. 35.10 MPa
What is the stress assuming the walls yield(moves) by 0.45mm?
A. 6.98 MPa
B. 18.68 MPa
C. 36.42 MPa
D. 53.78 MPa
Transcribed Image Text:17-18. A horizontal steel rod, 3.2 m long and 1200 mm² in cross-sectional area is secured between two walls. If the rod is stress free 30°C, compute the stress when the temperature has dropped to -15°C. Use a = 11.7 x 10° mm/mm°C and E = 200 GPa. What is the stress assuming the walls are rigid? Ina D. 46.80 MPa Cs Scenozoith Cars C. 35.10 MPa What is the stress assuming the walls yield(moves) by 0.45mm? A. 6.98 MPa B. 18.68 MPa C. 36.42 MPa D. 53.78 MPa
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