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- u represents joint displacements
- F represents joint forces
CSI Software transfers nonzero joint displacements to the right side of this equation such that equivalent applied loads represent their effect. Unknown displacements on the left side are then solved.
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Related Incidents: - Incident 27923: 1/20/2011 memo: When displacement load is applied to joints that are restrained and connected to links with all DOF as fixed, these are equivalent to constraints. Displacement loading cannot be applied through restraints to constraints. Either a stiff spring should be used at the joint in place of restraints, or stiff properties used in the link rather than fixed DOF.
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See Also
- Ground motion at specific supports – Manual multi-support excitation