Terms & Conditions

Data Security

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All data is stored in secure electronic systems accessible only to Oasys staff with both valid network login credentials and specific authorisation to access the system.  Our systems further limit data access by role to ensure data is available only to those who have a specific need to see it.

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Data Security Notice Updated 27th February 2020

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Website Terms and Conditions

The contents of this web site are protected by copyright and other intellectual property rights under international conventions. No copying of any words, images, graphic representations or other information contained in this web site is permitted without the prior written permission of the webmaster for this site.

Oasys accepts no responsibility for the content of any external site that links to or from this site.

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Software Licensing Terms

Terms and Conditions of Purchase

The full conditions of purchase and maintenance for all Oasys desktop software are set out in the Oasys Software Licence and Support Agreement.

The full conditions of purchase and maintenance for Oasys Gofer and Oasys Giraphe are set out in the Gofer SaaS Agreement  and the Giraphe SaaS agreement.

All prices are subject to TAX at the current rate.

Prices and specifications are subject to change without notice – please ask for a written quotation.

Although every care has been taken to ensure the accuracy of all information contained herein, the contents do not form or constitute a representation, warranty, or part of any contract.

Superseded Versions of Terms and Conditions

Oasys keeps copies of all superseded versions of its terms and conditions.

Maintenance & Support Services

Support and maintenance is included with all subscription licences for their full duration.

Annual maintenance contracts are available for software under a perpetual licence, prices are based on a percentage of the most recent list price.

This service includes:

 

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Cookies Policies

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Frew FAQ

Back to FAQs

Frew – It has been reported that FREW did, in the past, overestimate displacements. Does this still remain the case and if so is there any guidance on how much this might be?

Frew and other similar programs make a number of assumptions and simplifications in modelling the relatively complex situation of staged construction of a retaining wall.   These assumptions include, for example:-         
  • Neglecting or simplifying the likely effects of wall friction
  • Simplification of the action of structural supports (by treating them as springs fixed at one end) Very early versions of Frew considered only a “smooth” wall, which would tend to overpredict displacements.
  • Consideration of vertical shear on the wall was added in the early 1990s and significantly improved the results when compared with finite element analyses.
However, some overprediction can still be observed. Other points which are thought to be relevant to this are:-          
  • In the initial stages the ground may exhibit higher stiffnesses which are not represented by the linear elastic stiffnesses used in the program-
  • The ground may be partially saturated and have its strength and stiffness enhanced by suction It is difficult to give an estimate of the amount of over-prediction, given the variability of each individual site and local conditions.
Frew does compare well with similar programs and with finite element analysis, and various illustrations can be found in the literature.  There are some comparisons published in Ciria report C580, for example.

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