HW 2 Truss Displacements by Virtual Work For the three truss

HW 2 Truss Displacements by Virtual Work For the three truss structures given below, determine the joint displacements at the location and in the direction indicated. Give displacement results in terms of A and E. For example, 550/(AE). For the third truss problem

Solution

Image is not uploaded properly. Please upload it clearly and the displacement can be determined using following simple steps.

Step-1: calculate forces in all members due to applied loads.

Step-2: calculate forces in all members due to unit load (applied at the desired location of displacement)

Step-3: Joint Displacement () = (PkL / AE)

where P- Forces in all members due to applied loads

k- Forces in all members due to unit load

L- Length of members

A- Cross-Sectional Area

E- Modulus of Elasticity