ESIS TC12 "Risk analysis and safety of large structures and components"
|Faculty of Mechanical Engineering
University of Belgrade
Kraljice Marije 16, 11120 Belgrade 35, Serbia
Phone: +381 11 3302346
Fax: +381 11 3370364
Institute of Computational Technologies
José António Correia
INEGI, Faculty of Engineering
Abílio de Jesus
INEGI, Faculty of Engineering
TC12 UPDATE 2016
The ESIS Executive Committee decided to change the name of TC 12 in November 2016. The actual name of the ESIS TC12 is Risk Analysis and Safety of Large Structures and Components.
The experience of previous decades shows that those traditional methods of LTS safety which are based on the statistical paradigm of eliminating reasons of catastrophes, have almost exhausted their potential. New unexplored- or not taken into consideration causes inevitably arise instead of previous causes. To solve the problem, it is necessary to work out new theoretical approaches to the safety and to risk-based methods as a scientific basis for the prevention of technogenic disasters.
In additional, recent advances in maintenance, safety, risk analysis, management and life-cycle performance of a wide range of infrastructures, such as, bridges, dams, railways, underground constructions, wind and transmission towers, offshore platforms, pipelines, naval vessels, ocean structures, nuclear power plants, airplanes and other types of structures including aerospace and automotive structures are considered.
The formulation and development of perspective research directions in this area should become the object of the activities of the Technical Committee Risk Analysis and Safety of Large Structures and Components in the structure of ESIS.
The tasks and objectives of the Technical Committee are the following:
- Consolidation of the European scientific community to solve scientific and technical safety problems and issues of protection of technospheric objects;
- Development of perspective research directions, computational and experimental methods and technologies in the area of safety of engineering systems;
- Cooperative researches, held by specialists and scientists from various countries on behalf of reducing the rate of accident risks while operating dangerous objects and systems;
- Development of modelling the incident theory of large technical systems;
- Development of mechanical and mathematical models and risk-analysis technologies;
- Development of the concept of acceptable risk from the fracture mechanics’ point of view, and modern possibilities of monitoring technical conditions of potentially dangerous technospheric objects;
- Development of reliability and probabilistic approaches for the fatigue and fracture characterization of materials (metals, polymers, composites among others) and structures (metallic, composite, joints, etc);
- Elaboration of standards using methods of probabilistic risk-analysis of technical systems according to fracture mechanics criteria;
- Elaboration of standards using reliability and probabilistic models for the large structures and components according to local criteria;
- Elaboration of standards using risk models of complex hierarchical technical systems;
- Unification of approaches to safety analysis of large technical systems;
- Unification of analysis methods of information on technical condition of large technical systems;
- Creation of unified methods and the harmonization of national regulatory documents in the area of technical systems safety;
- Elaboration of special study courses, problem books and test books on fracture mechanics, fatigue, reliability theory, and risk-analysis of technical systems.
TC12 UPDATE 2008
In introducing the meeting the chairman Professor P Flewitt (Magnox Electrical and Bristol University) identified several issues that needed to be addressed. In particular how does quasi-brittle behaviour differ from brittle behaviour which occurs under linear-elastic and elastic-plastic conditions. A number of excellent presentations were given on the behaviour of concrete, graphite and ceramics by Prof. B Karihaloo (Cardiff University), Prof. R Stevens (Bath University),Dr A Hodgkins (Serco), Dr J Marrow (Manchester University), Dr G Neighbour (Hull University) Dr R Moskovic (Magnox Electric) and Prof. J Knott (Birmingham University). Presentations were followed by a discussion led by Prof. J Knott with contributions from, in particular Professors G Williams and D Smith. It was concluded that unlike brittle materials, quasi-brittle materials exhibit tension softening which is characterised by increase in deformation with decreasing tension capacity past the ultimate strength. This is one of the main reasons for the lack of success of LEFM in explaining the behaviour of quasi-brittle materials. Scaling of strength measurements obtained on laboratory sized specimens to structural components is one of the main challenges that need to be resolved for these materials.
TC12 UPDATE 2007
The meeting was held in central London at the Royal Academy of Engineering. The workshop opened with a welcome to the 30 delegates pointing out that, in addition to the informed presentations and discussions, it was hoped to identify future topics for inclusion in the forward programme for TC12. A short introduction was given by Professor P E J Flewitt, chairman for the day, setting the background to this important area of probabilistic assessments for both the industrial and business communities across many sectors of transport, power generation, petrochemical, civil structures and aerospace.
A wide range of high quality presentations followed covering modelling of fracture toughness by different statistical techniques which include both the Master Curve approach and statistical analysis. In addition to these, presentations were given on modelling of creep crack growth, fatigue crack growth, evolution of pitting in stress corrosion cracking and use of partial safety factors in fracture mechanics. Each presentation was followed by a lively discussion highlighting the many challenges that remain to achieve broad acceptance and application of probabilistically based structural integrity assessments for structures and components. In the course of the concluding discussion it was recognised that future topics to address would cover the use of computer simulations in modelling and application of probabilistic methods.
TC12 UPDATE 2006
Minutes of TC12 meeting held in London on June
TC12 has organised a ESIS TC12 Meeting.
Probability Modelling as Applied in Structural Integrity Assessments
Chaired by Professor Peter EJ Flewitt, Bristol University and British Nuclear Group
Date: 9th June 2006
Venue: Academy of Engineering, London, Great Peter St SW1P 3LW
Nearest underground station: Westminster and St James’s Park
To review use of statistical methods for interpretation of materials property data design of experiments and use probabilistic methods in structural integrity assessments.