Calculating Support Reaction Forces using Method of Joints

Click For Summary
The discussion focuses on calculating support reaction forces using the method of joints and highlights confusion regarding equilibrium equations. It is noted that applying these equations may lead to a cancellation of forces, resulting in a zero reaction force. Participants question whether summing moments at a specific point can provide an additional equation for solving the problem. There is uncertainty about whether the support reaction forces should equal the total weight of the structure plus any applied loads. Overall, the conversation emphasizes the complexities involved in analyzing statically indeterminate structures.
daphnelee-mh
Messages
62
Reaction score
4
Summary:: The question requires us to determine the member forces using method of joints but I couldn’t figure out how to calculate the support reaction forces

I tried to use equilibrium equations to solve the question but the force applied will be canceled out, and eventually the reaction force will be zero
 

Attachments

  • DAC9F7FC-64B0-447E-87D8-F4EEB7B66745.jpeg
    DAC9F7FC-64B0-447E-87D8-F4EEB7B66745.jpeg
    36.4 KB · Views: 167
Physics news on Phys.org
Summary:: The question requires us to determine the axial forces using method of sections but it is statically indetermine structure

Can I make up one more equation by summing the moment at point O ?
 

Attachments

  • 266755BC-C8E1-4F37-A9B1-0F3E371BA4D8.jpeg
    266755BC-C8E1-4F37-A9B1-0F3E371BA4D8.jpeg
    31.2 KB · Views: 169
Will the support reaction forces G and H not sum to the weight of the structure, plus the load ?
 
Baluncore said:
Will the support reaction forces G and H not sum to the weight of the structure, plus the load ?
Sorry I don’t understand
 

Thread 'AM-AM and AM-PM graph generation in LTSpice'

Greetings to all, I am writing with a question regarding graph generation in LTSpice. I am using LTSpice XVII and am trying to plot AM-AM and AM-PM characterization for a power amplifier, but I haven't been successful yet, likely due to my lack of practice with this specific analysis. I have been using a square wave input at 8.2 MHz as the voltage waveform for my power amplifier. It is said that for a switching amplifier like Class-D, the AM-AM / AM-PM (amplitude-to-amplitude and...
View full post »

Similar threads

Engineering Determining Force and Directions on Truss with Pulley
Replies
7
Views
2K
Engineering Two approaches in statics not adding up
Replies
5
Views
2K
Engineering 2nd Degree Inderteminacy for Structure Using Force Method
Replies
3
Views
2K
Engineering Solving for the Reaction Force by taking Moment about a Point
Replies
1
Views
2K
Engineering Instantaneous Center of Rotation (Polplan in german) and STATICS
Replies
1
Views
1K
Identifying Pin Joints & Rollers - Structural Analysis Homework Help
Replies
20
Views
4K
Engineering Loads on a shaft with V-Belts
Replies
2
Views
2K
Determine the forces using virtual work(unit force method)
Replies
2
Views
2K
Truss Analysis with Non-Parallel Supports and Point Load: Is My Method Correct?
Replies
3
Views
2K
Why is Only One Reaction Shown at the Pinned Support?
Replies
12
Views
2K