Linear Time History Analysis
Linear time history analysis is to calculate the linear responses of structures that are subjected to dynamic loads (force excitation) or base accelerations defined by the combination of the applied loads or base acceleration and load curve. The structure responses include nodal displacements, velocities and accelerations as well as element forces and moments etc at the chosen time intervals. If it is force excitation, the magnitude and locations of the dynamic loads are defined in the same way as that for static analysis and the variation of the dynamic loads along with time is defined by load curve in the unit of time versus load factor. If it is base acceleration, the load curve should be acceleration recordings of the ground motions in the unit of time versus acceleration, the ground accelerations varying with time given by the load curve can be scaled by a scaling factor that can be defined in the analysis wizard.