trusses_pins 1

trusses_pins 1 - Equilibrium of Trusses A truss consists of...

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Equilibrium of Trusses
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A truss consists of an interconnected system of weightless members which are pinned together at their ends with smooth pins. Thus, all the members of the truss are two force members . The applied loads and support forces are applied to the pins. If all the members are straight, as in the truss shown above, the truss is called a planar truss . If a truss consists of a series of interconnected triangular sections, as shown above, then the truss is called a simple truss .
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Simple trusses Simple trusses can be statically determinate, statically underdetermined (statically indeterminate), or statically overdetermined. If there are m members in the truss, n reaction forces on the entire truss and j pins, then a simple truss is statically determinant if (the truss above is statically determinant: 11 members, 3 reactions, 7 pins) The truss is statically indeterminate if The truss is statically overdetermined if (such trusses are unstable or not sufficiently constrained to prevent motion) 2 m n j + = 2 m n j + 2 m n j + <
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This note was uploaded on 10/17/2011 for the course EM 274 taught by Professor Boylan during the Fall '08 term at Iowa State.

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trusses_pins 1 - Equilibrium of Trusses A truss consists of...

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