Analysis & Design Process - automatic termination when extremely large deflections occur
[TSD-3399] The Analysis & Design Process will now terminate automatically when extremely large deflections* result from the First Order Linear 3D Building Analysis (which is always at the beginning of any Analysis & Design process). This will prevent the process continuing to higher order forms of analysis - such as non-linear - and the design phase, which may expend considerable processing resources and time running potentially into several hours before the process ultimately fails. This will prove to be a waste of time if the model contains errors which need to be addressed before running design. A typical example of the new termination and the message issued in this case is shown in the picture below.
*Such extremely large deflections are usually the result of mechanisms in the model - from for example incorrect connectivity or too many releases etc. We recommend these are always investigated and resolved before attempting Design. See the following TUA articles for guidance on what to do in this case; Guide to resolving Mechanisms and (N-1) rule for the number of pins to apply at a node where N members meet.