The Virtual Work Method

What is the principal of virtual work method?

• The Hooke's law

• The Newton’s laws of motion

• The law of conservation of energy

This formula is applicable to determine the displacement of any point of a

• Truss with fabrication error

• Truss subjected to external load

• Truss with temperature change

• Truss subjected to external load and fabrication error

This could be the virtual truss system to find

• the rotation at B

• the vertical displacement at B

• the horizontal displacement at B

• the vertical displacement at D

To find the rotation at c, which virtual system of beam is not correct?

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In determining the displacement of any points on trusses/beams/frames, one can simply assume the virtual load ( 1kN) direction. True or False?

• True

• False