Calculate Vertical Displacement at Point C with Virtual Loads in Truss

[vtaela]

Hi

I am trying to calculate the vertical displacement at point C for the following diagram

https://www.physicsforums.com/attachments/57161

So far i have calculated the forces in each member and i now need to calculate the Virtual forces!

I applied a virtual load at point c of 1 KN.

I also know that our structure is symmetrical!

Can you please help me to continue

Thank you

 

[SteamKing]

There's something wrong with your attachment. Please repost.

 

[vtaela]

 

[vtaela]

I have calculated tge vertical displacement to be 0.0172 mm

 

[rezeew]

for reaching out. Calculating the vertical displacement at point C with virtual loads in a truss involves using the principle of virtual work. This principle states that the work done by the external virtual forces on a structure is equal to the work done by the internal forces. This allows us to calculate the displacement at a specific point by applying a virtual load and solving for the corresponding displacement.

To proceed with your calculation, you will need to set up an equilibrium equation for the forces at point C. This will include the virtual load of 1 KN, as well as the forces from the members of the truss. Since the structure is symmetrical, you can use symmetry to simplify your calculations. This means that the forces in the members on either side of point C will be equal and opposite.

Next, you will need to apply the principle of virtual work by equating the work done by the virtual load to the work done by the internal forces. This will give you an equation that you can solve for the displacement at point C.

I hope this helps you continue with your calculation. If you need further assistance, please don't hesitate to ask. Good luck!