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Lecture 16 - ENGR-1100 Introduction to Engineering Analysis...

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ENGR-1100 Introduction to Engineering Analysis Lecture 16 Notes courtesy of: Prof. Yoav Peles
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Homework Assignment (due next class) Problem 7-7 Problem 7-15 Problem 7-22
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Today Lecture outline Structures: Trusses Frames Trusses analysis- method of joints Stability criteria.
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Two important structures types Trusses: Structures composed entirely of two force members. Frames: Structures containing at least one member acted on by forces at three or more points.
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Plane trusses: lie in a 2D plane. Plane trusses Space trusses: 3D geometry and/or loads.
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Assumptions 1) Truss members are connected at ends. 2) Truss members are connected by frictionless pins. 3) Truss structure is loaded only at joints. 4) The weight of each member is neglected.
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The four assumptions Truss members are two-force members F F Truss member F F
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Straight members F F Forces act along the axis of the member Compressive forces tend to shorten the member .
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