(Click Here).Time-history analysis provides for linear or nonlinear evaluation of dynamic structural response under loading which may vary according to the specified time function. Founded in 1975, Computers and Structures, Inc. Dynamic equilibrium equations, given by K u(t) + C d/ dt u(t) + M d 2/ dt u(t) = r(t), are solved using either modal or direct-integration methods. (CSI) is recognized globally as the pioneering leader in software tools for structural and earthquake engineering. 2) Traffic lane optimization When the Traffic Lane Optimization option is checked on, Midas Civil transversely floats the vehicle load within the lane and obtains the worst effect of the vehicle placement for each element. Initial conditions may be set by continuing the structural state from the end of the previous analysis. Step Size – Direct-integration methods are sensitive to time-step size, which should be decreased until results are not affected.HHT Value – A slightly negative Hilber-Hughes-Taylor alpha value is also advised to damp out higher frequency modes, and to encourage convergence of nonlinear direct-integration solutions.Nonlinearity – Material and geometric nonlinearity, including P-delta and large-displacement effects, may be simulated during nonlinear direct-integration time-history analysis.Links – Link objects capture nonlinear behavior during modal ( FNA) applications.

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