Structural News

Technical Paper: Diagnosing models with ill conditioning problems and curing them

Ramaseshan Kannan, senior engineer and software developer at Oasys hosted talks at the prestigious World conference on computational mechanics and ACME UK 2015 about diagnosing models with ill conditional problems and curing them.

In the talk, he presents a procedure for detecting ill conditioning in stiffness matrices arising in structural analysis. This method, which has been implemented in Oasys software GSA, uses examples of real-world structural models and how the tool has been applied and found useful. 

You can view the paper here

May 2015

Top Government Department Approves Use of GSA 8.7

Oasys are pleased to report that its flagship structural software, GSA 8.7, has been pre-accepted by the Building Department of one of the world’s largest and most densely populated Far Eastern cities. The department has added GSA 8.7 to its list of pre-accepted programs, specifically for static linear analysis and elastic critical load analysis. Engineers are now assured that the programs and their methodologies are pre-approved by the department’s staff, who typically deal with dozens of applications each month. This is a welcome endorsement from the organisation charged with setting and enforcing safety, health and environmental standards for private buildings, and to improve the quality of development in one of the world’s most prominent financial centres.

The features we’ve added to version 8.7 have undoubtedly played a major part in the adoption of GSA in an official capacity. It now supports more steel design codes than ever before, with the recent addition of EN 1993-1-1:2010 Eurocode 3 (SS) and SANS 10162-1:2011, and four more RC slab design codes than previous versions. New footfall analysis codes have also been added. We’ve developed an entirely new Mesh Generation Engine, which produces smaller and better-conditioned meshes, and we’ve made a host of Modal and Seismic Analysis improvements.

The full list of improvements and additions can be found here. A free, 30-day trial of GSA is available from the product page

July 2014

Arup Triumphs at RIBA National Awards 2014

The RIBA National Awards are the most rigorously judged awards for architectural excellence, with the winning buildings setting the standard for good architecture, so we are thrilled to congratulate our parent company, Arup, who has been involved in projects that won two awards at this year’s event – the London Aquatics Centre and the redevelopment of King’s Cross Station. We're proud to note that both projects featured Oasys GSA software.

June 2014

Young researchers in the limelight

Oasys is delighted to be supporting the next generation of structural engineers by sponsoring the 2014 IStructE Young Researchers' Conference in London on 5th March. A highlight of the conference will showcase presentations by 25 of the student delegates, who stand to win a share of a £2000 prize fund.

The Young Researchers' Conference is an annual event which provides a platform for research students to present their work and exchange ideas with their peers, industry leaders and selected members of the Institution. This year's keynote address will be given by Professor Molly Stevens FREng FIMMM FRSC MRPharmS FSB who is recognised nationally and internationally as one of the leading younger innovators in the multidisciplinary field of biomedical engineering.

Find out more about Oasys’ discounted University licensing scheme here

February 2014

Robustness and Efficiency in Engineering Modelling’ – A Talk at the Society for Industrial and Applied Mathematics.

On 9th January 2014, Stephen Hendry from Oasys spoke at the annual Society for Industrial and Applied Mathematics (SIAM) meeting regarding ‘Robustness and Efficiency in Engineering Modelling’.  The talk was well received by the SIAM members, who appreciate seeing their efforts translated into tools, and it also explored how the features discussed are built into Oasys GSA. Most notably, the GSA features which help engineers detect modelling errors and ways of determining the accuracy of element results.

 2014 SIAM UKIE Annual Meeting 

For further information, contact

February 2014

Structural Awards 2013 - WInners Announced

The 2013 Structural Awards have been announced and it's good news for Oasys with 11 of 12 winners being Oasys software users. For a full list of winners, please read the complete article here

November 2013

Structural engineering software reveals architecture of dragonfly wing

Engineers used Oasys GSA software to analyse the dynamic structure and resolve vibration patterns in order to understand the structural behaviour, and seemingly random variations of quadrangular and polygonal patterns, of a dragonfly wing.
Find out more here.
August 2012

Future - Tensegrity
The world's first bridge created using God's geometry, tensegrity, is celebrated in a new bookwhich was launched at

Brisbane's Gallery of Modern Art last week. Read the article here.
June/July 2012

More Praise For World’s First Tensegrity Bridge

The world’s first bridge created using God’s geometry, tensegrity, provides a the landmark pedestrian and cycle link to the Brisbane Museum of Modern Art. The Kurilpa Bridge was designed by Arup engineers using purpose-written software that linked into Oasys Software’s GSA. GSA Suite. Read the complete article here.
May 2012

Environmental impacts of structural materials –
Finding a rational approach to default values for software

Sarah C. Kaethner, BSc, CEng, MIStructE - Arup
Frances Yang, MEng, PE State of CA, LEED® AP - Arup
Structural engineers need to understand the environmental impact of their designs. This paper describes a project undertaken to review the confusing array of data and provide an approach which links data, tools and real-life material specification. The aim was to find a method of presenting environmental impacts alongside other design parameters, such as strength, so that these issues can be considered as a normal part of the design process. Environmental impact factors have been reviewed from international sources for a set of structural materials. A methodology for presenting the range of values for unreinforced concrete was developed using practice guidelines. Default data was developed to familiarise engineers with the relative impacts of materials and lead them to mitigation strategies through specification and further exploration of the issues. This data is for inclusion in structural software programs Oasys AdSec and GSA so that embodied impacts are reported alongside other structural design parameters. Because the software offers design options for different codes of practice in different countries, impact values for different countries were also needed.

Footfall Vibration and Finite Element Analysis

Oasys GSA is a structural analysis program commercially available to other consultants. One of the most popular features added within the past five years is the ability to calculate the vibrations caused by footfall and other human activities on any type of structure. See article here.
November 2009

Improvements in GSA for use in offshore design

Design + Technical Matters, Issue 1. See article here.
October 2009

Good Vibrations, Arup Design Yearbook 2008

GSA Footfall overview. See article here.

GSA 8.3 Released

Oasys, the software house of Arup, has recently launched a new version of GSA, its structural design and analysis software. See article here.
July 2008

Footfall Vibration

Vibration caused by human footfall has been recognised for some time and the advent of longer span and lighter structures has brought new issues to the fore. See article here (reprinted with permission by The Structural Engineer).
February 2008

Bounce Buster

Revolutionary new software could see the end to bouncy floor syndrome, a phenomenon which has cursed long span lightweight structures since the 1960s. See article here.
December 2007