Geotechnical Stability Analysis to Eurocode 7 - London

Overview

The adoption of Eurocode 7, which becomes mandatory in Europe in 2010, will mark a significant change in the way ultimate limit state analysis is performed. By treating parameter uncertainty more rigorously, leading to partial factors which are independent of problem type, Eurocode 7 provides the engineer with a robust and flexible limit state design methodology.A double stem wall problem solved using LimitState:GEO

However, to take full advantage of Eurocode 7 it is also important that engineers have a sound appreciation of the principles underpinning ultimate limit state (ULS) analysis and design methods, and how they can be used effectively in conjunction with Eurocode 7. This afternoon seminar will therefore also cover issues such as how ULS analysis methods can be applied to complex problems; common pitfalls to avoid; parameter sensitivity and analytical validity.

The move to Eurocode 7 also coincides with the availability to geotechnical engineers of a powerful new numerical analysis procedure, Discontinuity Layout Optimization (DLO) . With DLO the ultimate collapse state can be established rapidly and directly, whatever the type of geotechnical stability problem being faced. The fact that the Eurocode partial factors are also independent of problem type means that DLO and Eurocode 7 work well together. DLO is now incorporated within LimitState:GEO , an easy to use and generally available commercial software application, which will be made use of in this seminar.

Objectives

At the end of the seminar, participants should:

• be aware of the differences between rigorous limit analysis approaches and related approaches (e.g. based on limit equilibrium).
• be aware of how ULS analysis is performed with existing design codes, and the changes in philosophy Eurocode 7 brings.
• gain an appreciation of how an ULS design of a geotechnical structure is undertaken to Eurocode 7.
• gain an appreciation of the basis and range of applicability of different ULS analysis methods (including the new DLO procedure) and how complex problems can be tackled within the framework of Eurocode 7.
• be aware of the errors present in commonly utilized limit analysis formulae, and common mistakes encountered when applying ULS analysis methods.

A special feature of the seminar will be that collapse mechanisms for a wide variety of geotechnical stability problems will be used to reinforce the points being made, making use of the highly visual output of the DLO-based LimitState:GEO software.

Who should attend

Geotechnical engineers; civil and structural engineers; those with a responsibility for, or exposure to, geotechnical design.

Outline programme

• Introduction to limit analysis and limit equilibrium approaches; advantages and limitations; potential for under and over-conservatism.
• Basis of Discontinuity Layout Optimization (DLO) procedure; implementation in LimitState:GEO.
• ULS calculations to Eurocode 7; changes in design philosophy from previous codes.
• Eurocode 7 Design Approach 1 (DA1) case studies utilizing LimitState:GEO.
• Summary and conclusions.

Seminar tutors

The seminar will be delivered by Dr Colin Smith and Dr Matthew Gilbert, both Senior Lecturers at the University of Sheffield and also Directors of LimitState Ltd. Between them they have a long track record in the development and application of geotechnical and ultimate limit state analysis techniques. They are also originators of the new Discontinuity Layout Optimization (DLO) procedure.

Event

Title: 
Geotechnical Stability Analysis to Eurocode 7
Date: 
Tue, 16/09/2008
Time: 
2:00pm - 5:00pm

Venue

Imperial College
Room 120 Sir Alexander Fleming Building Imperial College Exhibition Road London SW7 2AZ
London

Details

• Introduction to limit analysis and limit equilibrium approaches;
advantages and limitations; potential for under and over-conservatism.
• Basis of Discontinuity Layout Optimization (DLO) procedure; implementation in LimitState:GEO.
• ULS calculations to Eurocode 7; changes in design philosophy from previous codes.
• Eurocode 7 Design Approach 1 (DA1) case studies utilizing LimitState:GEO.
• Summary and conclusions.