GGSD Program Details for STARES for Windows

STARES for Windows

Category	Reinforced slopes and walls
Publisher	University of Sydney
Platform	Win95/98
Status	Commercial
Description	STARES (STability Analysis of REinforced Soil) for Windows is a computer program which enables the user to compute the stability of an earth mass stabilised by reinforcement using an analysis based on Bishop's (1955) simplified method for unreinforced slopes. In these analyses the stabilisation provided by the reinforcement is assumed to be entirely due to the axial force generated along the reinforcement. Thus, the contribution that the shear forces in the reinforcement make towards improving the factor of safety against failure are assumed to be negligible and therefore not included in the analysis. This assumption means that it is suitable for assessing the internal stability of the following types of problems: wall systems retaining soil stabilised by the inclusion of metallic (e.g. Reinforced Earth) or non-metallic (e.g. Freyssisol by Austress Freyssinet) strips, slopes and walls stabilised with soil nails, slopes and walls stabilised with geotextiles or geomembranes. In these analyses a circular surface of rupture is assumed and then the equilibrium of the sliding mass of reinforced soil is considered. This process is repeated for a large number of circles and the minimum factor of safety determined. The slope (or soil retained by the wall) may be divided into a number of different soil layers with different properties. The reinforcement strips can be grouped into zones of reinforcement with all the strips in a zone being assigned the same properties. Pore pressures within each soil layer can be calculated by a number of different methods, viz. from the depth below a piezometric surface, by using a pore pressure coefficient ru, from a user specified grid of pore pressures, or from a grid of pore pressures generated by program FESEEP. External normal and shear tractions can be applied to segments along the surface of the slope. An interactive analysis option is also available that allows the user to interactively analyse circles as the mouse is moved. The circles are sorted into ascending order of factor of safety before being written to the solution file. The centres and radii for a user-specified number of circles can be generated automatically. The algorithm provides a good initial estimate of the location of the critical centre. This initial estimate can subsequently be used to determine the location and size of a user-specified grid of circles. A summary table may be generated for a circle, which lists for each slice the values used in computing the factor of safety. A demonstration version is available on the WWW.
Cost	Australian Dollars 1,100
Data formats supported	None stated
Supplier in Australia	University of Sydney