Analysis Types

Currently, ten analysis types are available in SeismoStruct:

• Eigenvalue analysis
• Static analysis (non-variable load)
• Static pushover analysis
• Static adaptive pushover analysis
• Static time-history analysis
• Dynamic time-history analysis
• Incremental Dynamic Analysis (IDA)
• Response Spectrum Analysis - RSA
• Buckling Analysis
• Tsunami Nonlinear Analysis

These can be selected from the drop-down menu at the top left corner on the Pre-Processor window (see picture below).

Different analysis types present equally diverse modelling requirements. Consequently, whereas the frame (elastic and inelastic) and link elements can be used for every analysis type, mass elements (lmass and dmass) are not needed in static analyses (with the exception of static adaptive pushover) and can be used only in dynamic, eigenvalue, adaptive pushover analysis and response spectrum analysis. Moreover, damping elements (dashpt) are only needed in dynamic analysis and IDA. Whenever the analysis type is changed, the program automatically attempts to apply the required modifications to the existing model. For example, if in an already-built dynamic analysis project, the analysis type is changed to static pushover, SeismoStruct will automatically remove the mass and damping elements.

In addition, the different analysis types accept equally diverse types of loading.