GGSD Program Details for MTR/SASSI

MTR/SASSI

Category	Dynamics (soil-structure interaction)
Publisher	MTR Associates, Inc.
Platform	Win2000, WinXP
Status	Commercial
Description	MTR/SASSI consists of a set of interrelated computer programs, which can be used to solve a range of dynamic soil-structure interaction (SSI) problems in two and three dimensions. The program uses the flexible volume method, which is formulated in the frequency domain using complex impedance functions. This methodology enables full nonreflecting domain boundaries in SSI analyses. The site is modeled as a semi-infinite visco-elastic horizontally layered system over rigid rock or halfspace. The structure is modeled using finite elements (3-D solid, 3-D beam, 5-node flat plate/shell, 4-node plane strain, 3-D spring, 3-D matrix, and axisymmetric). Dynamic loads include force, seismic and ambient vibrations. The program can handle a general seismic wave field consisting of vertically or inclined propagating body and surface waves. It is an improved version of the SASSI program originally developed at UC Berkeley. It includes algorithms for developing rigid and flexible foundation impedances and allows direct input of frequency-dependent as well as LPFM. It is capable of iterating on soil properties using equivalent linear method. Other enhancements include random vibration analyses using PSD input. The program restart capabilities provide maximum flexibility and economy for practical applications. It is supported and has controlled QA documentation.
Cost	US Dollars 4000
Data formats supported	None stated
Supplier in United States of America	MTR Associates, Inc.