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

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Discussion Overview

The discussion revolves around the drawing of N-, V-, and M-diagrams for a specific structural analysis problem involving a structure that is not classified as a truss. Participants explore the characteristics of the structure, its stability, and the appropriate methods for diagramming forces and moments.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions the classification of the structure as a truss and seeks guidance on drawing the N-, V-, and M-diagrams.
  • Another participant suggests that the problem lacks a clear statement and notes that typically, roofs or slabs are supported by beams that transfer loads to trusses.
  • A different participant asserts that the structure is not unstable and recommends consulting tutorials for guidance on drawing the diagrams.
  • One participant expresses familiarity with drawing diagrams for normal beams but indicates uncertainty regarding this specific case.
  • Another participant mentions that moments will only occur on the AD-DB part of the structure.
  • There is a claim that the structure consists of trussed beams, which is contested by earlier assertions about its classification.

Areas of Agreement / Disagreement

Participants express differing views on the stability of the structure and its classification as a truss. There is no consensus on how to approach the drawing of the diagrams, indicating multiple competing views remain.

Contextual Notes

Some assumptions about the structure's support conditions and load transfer mechanisms are not fully articulated, which may affect the analysis. The discussion also reflects uncertainty regarding the specific characteristics of the beams involved.

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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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.
 
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.
 
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.
 
I know how to draw the diagrams on normal beams, but not in this particular case.
 
You'll have moments on the AD-DB part only, unless I'm missing something.
 
radou said:
You'll have moments on the AD-DB part only.

That's right. This is a trussed beam (or 2 trussed beams).
 
Last edited:

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