02.049 london cline the problem asked me to find the...
Post on 09-Jun-2018
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02.049
London Cline
The Problem asked me to find the horizontal and vertical connections at A and C of the gable frame (the support reactions). A, B, and C are pin connections. The purlin loads such as D and E are applied perpendicular to the center of each girder.
My Hand Calculations:
Model (just the beams):
Model with Supports and Releases:
Model with Applied Loads:
Reaction Forces:
Robot Results: My Results: % Difference to two decimal places:
Ax= -0.52 kip Ax= -0.5214 kip 0% Ay= 1.47 kip Ay= 1.473 kip 0% Cx= -0.68 kip Cx= -0.6786 kip 0% Cy= 1.97 kip Cy= 1.973 kip 0%
The Robot results match my results exactly. The reason they did not match correctly on the first model was because the pin connection at B should have been modeled as a release, not a support pinned connection. To two decimal places, the Robot model has the exact same results as my calculations predicted.
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