How Can You Solve for Force in Member GI of a Truss?

[canicon25]

Can anyone suggest the method to use for solving for the force in member GI in the attached diagram? Is there a way to section the truss?

 

[hotvette]

It might help to first find the external reaction forces at H and I. There are normally some rules/assumptions about truss analysis. Do you know what they are? They must have been provided in class or the book.

 

[PhanthomJay]

There may be an easier way, but after solving reactions, use the method of joints, starting at A, and then grind out the forces, carefully watching plus and minus directions, joint by joint, until reaching the bottom...

 

[canicon25]

yeah i forgot to mention that i can solve for the external forces okay. i was hoping i wasn't seeing a way to section it, hoping to avoid going join by join.

thanks community.

 

[PJC01]

There are several methods that can be used to solve for the force in member GI in a truss. One approach is to use the method of joints, where the forces at each joint are calculated by considering the equilibrium of forces in both the horizontal and vertical directions. Another method is the method of sections, where a section of the truss is isolated and the forces acting on that section are calculated using the principles of equilibrium.

In order to solve for the force in member GI, it may be helpful to section the truss and focus on the section that includes member GI. This can simplify the problem and make it easier to apply the principles of equilibrium. However, it is important to ensure that the section chosen does not cut through more than three members, as this could lead to an indeterminate system.

Ultimately, the method used to solve for the force in member GI will depend on the specific characteristics of the truss and the desired level of accuracy. It may be helpful to consult with a structural engineer or utilize computer software to accurately determine the forces in the truss members.