GGSD Program Details for FoSSA

FoSSA

Category	Settlement analysis
Publisher	ADAMA Engineering, Inc.
Platform	Win95/98, WinNT, Win2000
Status	Commercial
Description	FoSSA is an interactive program for assessing stresses and settlements under an embankment. Version 1.0 was developed for the US Federal Highway Administration (FHWA). The current version 2 calculates the stress distribution under an embankment having complex geometry, the elastic (immediate) settlement, the consolidation settlement (including isochrones: excess porewater pressure and settlement during the consolidation process), accelerated consolidation settlement due to PVD's (triangular and square installation patterns), secondary settlement, and undrained shear strength distribution within consolidating layers. It can deal with up to 50 soil layers in the foundation (consolidating or not) and up to 25 layers comprising the embankment (representing alternating layers of geofoam and soil). It is ideal for staged construction calculations. Stress distribution is based on numerical integration of the basic Boussinesq equation (therefore allows for various embankment geometries). Elastic settlement is based on numerical integration of Hooke's equations. Consolidation settlement (1-D) solves Terzaghi's differential equation using a finite difference scheme. PVD's design follows: Prefabricated Vertical Drains, Vol. I: Engineering Guidelines, by Rixner, Kraemer, and Smith, Haley & Aldrich, FHWA report FHWA/RD-86/168, September 1986, Contract No. DTFH61-83-C-00101 (which is a practical modification of Barron's solution developed for vertical sand drains). The undrained shear strength calculations during consolidation follows: Stability Evaluation during Staged Construction, by Ladd, Journal of Geotechnical Engineering, ASCE, 1991, Vol. 117, No. 4, pp. 540-615. It can also calculate stresses and settlements under multiple rectangular footings. Computations follow the same theories as those used for embankments.
Cost	US Dollars 1100
Data formats supported	None stated
Supplier in United States of America	ADAMA Engineering, Inc.