Understanding Structural Behaviour - Solution To A Question On A Pin Jointed Truss

[@miguelfeijo88]

Hi Engineer your tutorial are so marvelous. Keep up the good work

[@jayp7003]

Top right joint - there are no forces vertically... Bottom left joint - there are forces vertically because of P upwards... How come P upwards on the right hand side doesn't mean there are forces vertically?

[@mikebather]

Hi jay p, Good question. This is counter intuitive but still correct. At the bottom left of the truss, the vertical reaction must be balanced by the vertical compression in the left most member of the truss. There are no other members at this joint. At the bottom right of the truss, the vertical reaction is balanced by the vertical component of the compressive force in the diagonal member. So the vertical member at this joint is not carrying any force. At around 7.00 minutes you can see a diagram that helps to explain this. I hope that this helps, Mike

[@ronallan8680]

Does this mean if you remove the two top right members, the truss will still be in equilibrium?

[@davidroberto4092]

It means that the 2 members on the right that Mike has assumed have got zero force going through them are actually redundant. They could be removed and the truss would work just as well

[@munawarhussain7878]

Upload more videos plz.