How Can You Solve for Force in Member GI of a Truss?

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Discussion Overview

The discussion revolves around methods for solving for the force in member GI of a truss structure. Participants explore various approaches to truss analysis, including the use of external reaction forces and the method of joints.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant asks for suggestions on methods to solve for the force in member GI and inquires about the possibility of sectioning the truss.
  • Another participant suggests that finding the external reaction forces at points H and I is a helpful first step, mentioning that there are rules and assumptions related to truss analysis that should be considered.
  • A different participant proposes using the method of joints, starting from joint A, to calculate the forces while being mindful of the direction of forces at each joint.
  • A later reply indicates that the original poster is already capable of solving for external forces and is looking for an alternative method to avoid the joint-by-joint approach.

Areas of Agreement / Disagreement

Participants express different approaches to solving the problem, with no consensus on a single method. The discussion remains unresolved regarding the best technique to apply.

Contextual Notes

Participants reference rules and assumptions about truss analysis, but these are not explicitly detailed in the discussion. The effectiveness of the proposed methods may depend on specific conditions of the truss not provided in the thread.

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Can anyone suggest the method to use for solving for the force in member GI in the attached diagram? Is there a way to section the truss?

truss2.jpg
 
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It might help to first find the external reaction forces at H and I. There are normally some rules/assumptions about truss analysis. Do you know what they are? They must have been provided in class or the book.
 
There may be an easier way, but after solving reactions, use the method of joints, starting at A, and then grind out the forces, carefully watching plus and minus directions, joint by joint, until reaching the bottom...
 
yeah i forgot to mention that i can solve for the external forces okay. i was hoping i wasn't seeing a way to section it, hoping to avoid going join by join.

thanks community.
 

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