- #1
Statics and Structural Analysis Question
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Discussion Overview
The discussion revolves around solving statics and structural analysis problems, specifically focusing on drawing shear and bending moment diagrams for continuous beams and determining support forces. Participants explore techniques for calculating unknown forces and addressing loading diagrams in the context of statically indeterminate systems.
Discussion Character
- Homework-related
- Technical explanation
- Exploratory
Main Points Raised
- One participant expresses uncertainty about how to start solving a problem involving shear and bending moment diagrams.
- Another participant emphasizes the importance of understanding the connections at joints B and E before proceeding with calculations.
- It is suggested that starting with the reaction forces at points A and F could be a good approach to find unknown forces.
- A participant mentions that the beam is continuous and indicates a belief that they can solve the problem after receiving guidance.
- There is a proposal to calculate support forces that are easiest to determine and to continue until all forces are calculated.
- One participant notes that both problems presented are statically indeterminate, requiring specific procedures for such systems to determine loads.
Areas of Agreement / Disagreement
Participants generally agree on the approach of calculating support forces and the need to understand the system's connections. However, there are multiple competing views on the best methods to tackle the problems, and the discussion remains unresolved regarding specific techniques for the loading diagrams.
Contextual Notes
The discussion highlights the challenges of dealing with statically indeterminate systems and the need for clarity on joint connections, which may affect the calculations. There are also unresolved aspects regarding the specific methods for drawing loading diagrams.
Who May Find This Useful
Students and practitioners in structural engineering, civil engineering, or related fields who are dealing with statics and structural analysis problems may find this discussion relevant.
- #2
jrmichler
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- 3,540
First, are the beams connected with pin joints at B and E? That needs to be understood before proceeding.
After you are clear on the problem to be solved, the technique is to start wherever you can calculate something. Usually, you can calculate at least one unknown force, and the result will allow you to find another unknown force. Keep going until you have all unknown forces. Then you will be ready to start the shear and moment diagrams.
The reaction forces at A and F would be a good place to start. From those, you can find the reaction forces at B and E, followed by ...
After you are clear on the problem to be solved, the technique is to start wherever you can calculate something. Usually, you can calculate at least one unknown force, and the result will allow you to find another unknown force. Keep going until you have all unknown forces. Then you will be ready to start the shear and moment diagrams.
The reaction forces at A and F would be a good place to start. From those, you can find the reaction forces at B and E, followed by ...
- #3
track1716
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Thank you! It’s a continuous beam. I think I can solve it now. I ran into 2 other problems i’m having trouble with as well. How would I draw the loading diagrams for these 2 problems? How do I calculate the force pushing up on either end where the column joints are? If that even makes sense...jrmichler said:
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- #4
jrmichler
Mentor
- 2,448
- 3,540
Same procedure - calculate the support forces that are easiest to calculate, then keep at it until all have been calculated. Keep at it until you succeed. Both problems are solvable. Both will take some time.
Another approach is to calculate the loading on each beam, then work outward to the columns.
These two cases are statically indeterminant, so you will need to use the procedure for statically indeterminant systems to get the loads.
Another approach is to calculate the loading on each beam, then work outward to the columns.
These two cases are statically indeterminant, so you will need to use the procedure for statically indeterminant systems to get the loads.
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