Understanding N-, V-, and M-Diagrams for Structural Analysis

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In summary, the conversation is discussing a problem with drawing N-, V-, and M-diagrams for a structure that is not a truss, but rather a combination of simply supported beams. The structure is considered unstable and there are tutorials available to help with drawing the diagrams. The main focus is on the AD-DB section, which will have moments.
  • #1
kasse
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http://www.badongo.com/pic/640743

Certainly, this is not a truss, because of q. Can anyone explain how I can draw the N-, V- and M-diagram for the structure?
 
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  • #2
Does this problem comes with a statement?, usually a roof or slab is supported by beams which receive the load from the slab and then send it to the truss as point loads. This structure as a whole is unstable.
 
  • #3
Cyclovenom said:
Does this problem comes with a statement?, usually a roof or slab is supported by beams which receive the load from the slab and then send it to the truss as point loads. This structure as a whole is unstable.


No, there's no statement. But AD and DB is to be regarded as two simply supported beams.
 
  • #4
Actually, it's not unstable, but you might want to look in our tutorial section, there are a couple of tutorials that explain how to draw the diagrams.
 
  • #5
I know how to draw the diagrams on normal beams, but not in this particular case.
 
  • #6
You'll have moments on the AD-DB part only, unless I'm missing something.
 
  • #7
radou said:
You'll have moments on the AD-DB part only.

That's right. This is a trussed beam (or 2 trussed beams).
 
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1. What are N-, V-, and M-Diagrams used for in structural analysis?

N-, V-, and M-Diagrams are graphical representations used to analyze the internal forces, moments, and shear forces in a structural member. They help engineers and scientists understand how a structure will behave under different loading conditions.

2. How do N-, V-, and M-Diagrams differ from each other?

N-Diagrams represent the internal axial forces (tension and compression) in a member, V-Diagrams represent the shear forces, and M-Diagrams represent the bending moments. They all have different shapes and scales, but they are all interconnected and provide a comprehensive understanding of the internal forces in a structure.

3. What are some common applications of N-, V-, and M-Diagrams?

N-, V-, and M-Diagrams are commonly used in the design and analysis of buildings, bridges, and other structures. They are also useful in the assessment of existing structures and in forensic investigations of structural failures.

4. How are N-, V-, and M-Diagrams created?

N-, V-, and M-Diagrams are typically created using computer software, such as structural analysis programs, which use mathematical equations and algorithms to calculate and plot the internal forces in a structure. They can also be hand-drawn using the principles of statics and mechanics of materials.

5. What are some limitations of N-, V-, and M-Diagrams?

N-, V-, and M-Diagrams provide a simplified representation of the internal forces in a structure and do not take into account other factors such as material properties, geometric imperfections, and dynamic effects. Therefore, they should be used in conjunction with other structural analysis methods and should not be solely relied upon for design or assessment purposes.

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