1. 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 106 / °C c. Vertical displacement of joint A in mm due to external force only. Put negative sign if its downward. I 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 4.1m A B ' 3.6 kN 5.4 kN 4.1m 4.1m

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Loads and Reactive Forces

Loads are the external influences that a beam experiences under its working conditions. For instance, a beam may be subjected to shear loads, twisting loads, bending moment, and axial loads during its working conditions. Engineers primarily deal with beams and trusses in the civil engineering domain. Due to the influence of loads, it is very crucial to determine the induced stresses and deformation values. These values give an insight into the critical area of the beam that needs to be worked upon to make it fail-safe.