Truss analysis, section method

In summary, truss analysis is a method used in structural engineering to determine internal forces and stresses in a truss structure by breaking it into smaller sections and applying equations of equilibrium and statics. The section method, also known as the method of joints, is a specific technique used in truss analysis. This method assumes that the truss is made up of straight, rigid members connected by frictionless pins or hinges at the joints, and that the loads are applied only at the joints and the weight of the members is negligible. The steps involved in truss analysis using the section method include drawing a free body diagram, breaking the truss into sections, analyzing each section, and checking the results. The advantages of using the section method include its
  • #1
J-dizzal
394
6

Homework Statement


Determine the forces in members BC and CG. The forces are positive if in tension, negative if in compression.[/B]
20150715_212522_zpsqjac02vi.jpg


Homework Equations


ΣF=0
ΣM=0

The Attempt at a Solution


20150715_212613_zpscgwqkzpn.jpg

I don't know where I am going wrong, My equations include the applied force, since there is only one.
 
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  • #2
solved. I had some signs wrong and copied down 76 insted of 78.
 
Last edited:

What is truss analysis?

Truss analysis is a method used in structural engineering to determine the internal forces and stresses within a truss structure. It involves breaking down the truss into individual sections and analyzing them using equations of equilibrium and statics.

What is the section method in truss analysis?

The section method is a technique used in truss analysis to calculate the internal forces and stresses within a truss structure by breaking it into smaller sections and analyzing each section individually. This method is also known as the method of joints.

What are the assumptions made in truss analysis using the section method?

The section method assumes that the truss is made up of straight, rigid members connected by frictionless pins or hinges at the joints. It also assumes that the loads applied to the truss are applied only at the joints, and that the weight of the members is negligible.

What are the steps involved in truss analysis using the section method?

The steps involved in truss analysis using the section method include drawing a free body diagram of the entire truss structure, breaking the truss into smaller sections, analyzing each section using equations of equilibrium and statics, and finally, checking the results for consistency.

What are the advantages of using the section method in truss analysis?

The section method is a simple and efficient way to analyze truss structures, as it involves breaking down the structure into smaller, more manageable sections. It also helps to identify any critical sections of the truss where the internal forces are high, allowing for the proper design of those sections.

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