The discussion revolves around finding the forces in specific beams of a truss problem, focusing on the application of the Method of Sections. Participants seek guidance on how to approach the problem and apply the method correctly.
Participants generally agree on the use of the Method of Sections but express differing levels of familiarity and understanding of the method. There is no consensus on the specific approach to take, as some participants suggest different cutting strategies and problem-solving techniques.
Participants have not fully resolved the method for cutting the beams or the implications of zero force members, indicating potential gaps in understanding or assumptions about the truss configuration.
Students or individuals studying structural analysis, particularly those learning about truss problems and the application of the Method of Sections.
Oh that's unfortunate. But you don't want to cut more than 3 members. Try looking at the left section of the truss cutting thru members 1, 2, and 3. Then sum moments about the lower left hand corner to solve for the force in member 3. Then you can use the sum of forces in x direction and in y direction = 0 to solve for for force in member 2 and 1. Force in member 4 should then be obvious maybe.Zaza669 said:No. I have to use Method of section. I have no idea how to cut the 4 beam together.
PhanthomJay said:Oh that's unfortunate. But you don't want to cut more than 3 members. Try looking at the left section of the truss cutting thru members 1, 2, and 3. Then sum moments about the lower left hand corner to solve for the force in member 3. Then you can use the sum of forces in x direction and in y direction = 0 to solve for for force in member 2 and 1. Force in member 4 should then be obvious maybe.