Exam 2 Review Concepts - Exam 2 Concept Review Concept 1...

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Exam 2 Concept Review Concept 1 - Evaluating beam reactions, shear force and bending moment diagrams. You will have 1 problem on this concept. Evalute reactions, and compute shear force diagram plus bending moment diagam. You will be given the RULES for SFD and BMD on the formula sheet. The key to scoring well on this part of the exam is through mastery, which is achieved by practice. To maximize your points : 1) Show your equilibrium equations when computing beam reactions. 2) For each diagram, clearly indicate shape (Constant, Linear, Quadratic) and value of the diagram at each transition point. 3) For shear diagrams, indicate the location where the diagram crosses zero, which can be found by: 4) For moment diagrams, be sure to compute the value of the moment at the maximum and minimum. 5) The change in moment between two locations is the area of the shear diagram between those two points. For trapezoidal areas: 6) Show your calculations along the side. If you make an error in your calculation, it will be obvious why, so you won't lose as many points. Concept 2 - Evaluating section properties. Centroid and I z about centroidal axis. I z b h 3 12 For a rectangle about its centroidal axis. You need to remember this.
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Any other section can be treated by superposition of rectangles. I z b f d 3 12 b f t w d 2 t f 3 12 Wide Flange , symmetric flanges.
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