The seismic features integrated into LARSA 4D are the product of collaborative efforts between the University of Buffalo's
National Center for Earthquake Engineering Research and LARSA, Inc.
LARSA's nonlinear time history analysis uses a combination of the Newmark-Beta time integration algorithm and the full Newton-Raphson method using iterations within each integraion time-step. Graphical tools for plotting displacements, force and other time history results are easy to use and provide many output options.
Varying levels of seismic analysis capabilities are included in following LARSA 4D BRIDGE SERIES packages: