When a frame structure is subjected to support settlement, huge amount of bending moment developed in the affected members. Here, we inspect the internal moment of a statically indeterminate frame subjected to settlement of 10mm at only one support. As a result, the horizontal member is forced to sustain moment way larger than those created by loading itself.
The following shows the solution for a frame with support settlement. Watch the video above for full details.
Frame overview
Calculation of stiffness, DF and FEM
Moment distribution
Solution for end moments
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