ch6_1_student_notes_Fall2010

ch6_1_student_notes_Fall2010 - TRUSSES METHODS OF JOINTS...

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TRUSSES METHODS OF JOINTS Today’s Objectives : a) Define a simple truss. b) Determine the forces in members of a simple truss. c) Identify zero-force members. In-Class Activities : Applications Simple truss Methods of joints Zero-force members Problems and Questions
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APPLICATIONS Trusses are commonly used to support a roof. For a given truss geometry and load, how can we determine the forces in the truss members and select their sizes? A more challenging question is that for a given load, how can we design the trusses’ geometry to minimize cost?
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APPLICATIONS (continued) Trusses are also used in a variety of structures like cranes and the frames of aircraft or space stations. How can we design a light weight structure that will meet load, safety, and cost specifications?
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DEFINING A SIMPLE TRUSS (Section 6.1) A truss is a structure composed of slender members joined together at their end points. If a truss, along with the imposed load, lies in a single plane (as shown at the top right), then it is called a planar truss .
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