Frame Analysis Using Method of Members, Another Problem

[iceicebaby03]

Frame Analysis Using Method of Members.

Determine the force in bar BE.


2. Well, I don't know where to start. I know there are three equations EFy=0, EFx=0, EMc=0 but I don't know what the first member to consider and how to solve this type of problem.

There is a final answer given, BE = 2410 lb (Compression)
I am trying to isolate the left and right trusses. Is that the right thing to do?
Please help, Thanks!

 

[nvn]

Yes, that is correct.

 

[Mene]

I understand your confusion and frustration with this problem. Frame analysis using the method of members can be a complex and challenging process, but with practice and a clear understanding of the principles involved, it can be solved successfully.

To determine the force in bar BE, you will need to follow a few steps. First, you need to identify the external forces acting on the frame. These can include applied loads, reactions at supports, and weight of the frame itself. Once you have determined these external forces, you can move on to analyzing the internal forces in the frame.

To do this, you can start by isolating the left and right trusses, as you mentioned. This will simplify the problem and allow you to apply the equations EFy=0, EFx=0, and EMc=0 to each truss separately. You can then use the method of joints and method of sections to determine the forces in each member.

It is important to note that the first member you choose to analyze does not affect the final answer, as long as you are consistent in your approach. However, it is often helpful to start with the simplest or most straightforward member.

In this case, the final answer given, BE = 2410 lb (Compression), indicates that the force in bar BE is acting in a compressive direction. This means that the member is being pushed together, rather than pulled apart. This information can help guide your analysis and ensure that your final answer is correct.

I encourage you to continue practicing and seeking help when needed. As with any scientific process, frame analysis using the method of members requires patience, attention to detail, and a thorough understanding of the principles involved. With persistence and determination, I am confident that you will be able to successfully solve this and other frame analysis problems.