Internal Forces
    Lecture 4
    Arch 324/624, Introduction to Structural Design, University of Virginia
     Copyright © 1996-2009 Kirk Martini. Last Modified Tue, 27-Jan-2009 15:36     		next>
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    • Review Points
    • 14th Street Bridge
    • HW Review

    Topics

    After looking at the equilibrium of forces acting on a single object, the inquiry can continue in two directions:

    • Upward abstraction: The equilibrium and transfer of forces among assemblies of objects. Framing Systems.

    • Downward abstraction: The equilibrium and transfer of forces among portions of an object. Internal Forces.

    The next two lectures will move downward in abstraction, looking at internal forces. Then we'll move upward in abstraction and spend a lecture looking at framing systems.

    Internal Forces

    • Internal force
    • Axial force
    • Shear
    • Bending moment
    • Internal force diagrams
      • Relationships of load, moment, and shear.
      • Methods for calculating shear and moment diagrams.

    Some Examples

    • Shear

    • Bending Moment
    Arch 324/624, Introduction to Structural Design, University of Virginia
     Copyright © 1996-2009 Kirk Martini. Last Modified Tue, 27-Jan-2009 15:36    		   Table of
    Contents