ASDSO Dam Safety Toolbox

Dynamic Analysis

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"In dynamics, the time dependence is strictly considered because the calculation of inertial forces requires derivatives respect to actual time to be taken. Dynamic analysis is needed when the variation of displacement with time is so rapid that inertial effects cannot be ignored. Practical examples for these analyses are: earthquakes, vehicle crashes, rocket launches, etc."[1]

"Several analytical methods are available to evaluate the dynamic response of structures during earthquakes: seismic coefficient, response spectrum, and time-history. These methods are discussed in reference ER 1110-2-1806. The current state-of-the-art method uses linear-elastic and nonlinear finite element time history analysis procedures, which account for the dynamic interaction between the structure, foundation, soil, and water. The seismic coefficient method, although it fails to account for the true dynamic characteristics of the structure-water-soil system, is accepted as a semiempirical method for determining if seismic forces control the design or evaluation, and to decide if dynamic analyses should be undertaken."[2]

Types of Dynamic Analysis


Revision ID: 6103
Revision Date: 12/20/2022