a. Axial force on member ED from the real structure in kN. Put (-) negative sign if it's under compression. b. Axial force on member AE from the virtual structure for the vertical displacement at joint A. c. Vertical displacement of joint A in mm due to external force only. Put negative sign if its downward. d. Vertical displacement of joint A in mm due to -100 °C change in temperature in members AE and ED. Don't add deflection due to external loads or fabrication error. Put negative sign if its downward.
a. Axial force on member ED from the real structure in kN. Put (-) negative sign if it's under compression. b. Axial force on member AE from the virtual structure for the vertical displacement at joint A. c. Vertical displacement of joint A in mm due to external force only. Put negative sign if its downward. d. Vertical displacement of joint A in mm due to -100 °C change in temperature in members AE and ED. Don't add deflection due to external loads or fabrication error. Put negative sign if its downward.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Use Virtual Work Method to answer the questions below considering the truss shown in the figure.
Assume A = 1200 mm?, E = 200 GPa and a = 12 x 10° /°C
a. Axial force on member ED from the real structure in kN. Put (-) negative sign if it's under compression.
b. Axial force on member AE from the virtual structure for the vertical displacement at joint A.
c. Vertical displacement of joint A in mm due to external force only. Put negative sign if its downward.
d. Vertical displacement of joint A in mm due to -100 °C change in temperature in members AE and ED. Don't
add deflection due to external loads or fabrication error. Put negative sign if its downward.
E
4.2 m
A
B
3.6KN
5.5KN
4.2 m + 4.2 m
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