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Dynamic Analysis in RM Bridge is a very important feature as the program concept is to perform dynamic analyses within the schedule, together with static analyses on the same model in accordance with the active construction stage. Therefore, the is almost no "additional" modeling effort. The model dynamics depends on three major aspects:
The most well-known restriction is due to the lumped mass matrix: as the masses are not distributed, as in reality; but, considered concentrated in the nodes this requires a sufficiently fine subdivision of the structural parts into elements. Though the usual 1/10 of the span for static analysis is normally good enough also for dynamics, only piers might require special attention to their subdivision requirements. The usual natural frequencies analysis is performed and the inclusion of non-linearities is also possible. Two main possible analyses are available: