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Why do we use pin joints in the analysis of trusses?

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Since members dont devolop any moments (at joints) there is no necessity of arresting rotations. So basically its not the pin joints that decide the behavior of truss, its the configuration of truss and load application way that eliminates the necessity of regid joints. read more

The reason that we choose to analyse pin jointed trusses is simple - it is the simplest structure possible, so the analysis is also simple. So we can explore the methods of analysis without having to spend much time and effort. read more

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Method of Joints
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Truss Analysis using Method of Joints
www.learnengineering.org

unit 18 Trusses: Method Of Joints
www.secretsofengineering.net

Why Pin Jointed Trusses?
akabaila.pcug.org.au