TY - CHAP A1 - Diamantidis, Dimitris A1 - Canisius, Gerard T1 - Risk based criteria for the verification of global structural performance T2 - 1st International Conference on Performance Based and Life-Cycle Structural Engineering (PLSE 2012), 5 - 7 December 2012 in Hong Kong, China Y1 - 2012 UR - https://www.researchgate.net/publication/281290353_Risk_based_criteria_for_the_verification_of_global_structural_performance PB - HKISC CY - Hong Kong ER - TY - CHAP A1 - Retief, Johan Verster A1 - Diamantidis, Dimitris A1 - Barnardo-Viljoen, Celeste A1 - van der Klashorst, Etienne T1 - Application of Risk Based Infrastructure Design Concepts to provision for climate change T2 - American Meteorological Society (AMS), 94th AMS annual meeting, Atlanta, Georgia, USA Y1 - 2014 PB - American Meteorological Society ER - TY - CHAP A1 - Holický, Milan A1 - Diamantidis, Dimitris A1 - Retief, Johan Verster A1 - Barnardo-Viljoen, Celeste T1 - On Standardization of the Reliability Basis of Structural Design T2 - ICASP12 : 12th International Conference on Applications of Statistics and Probability in Civil Engineering, Vancouver, Canada, July 12-15, 2015 N2 - The principles of structural reliability are sufficiently advanced to be used extensively to develop design standards even at international level. The concept of limit states is generally accepted and implemented. Present standards are however to a large extent based on past experience, rather than on quantitative reliability modeling. It appears that reliability principles and models can bridge the gap between probabilistic assessment and operational design. Representative theoretical models are presented to indicate how judgment based reliability concepts can be complemented or replaced by the use of such models. The importance of reliability levels, reference period, design working life, specified characteristic values of basic variables and methods to derive their design values from reliability procedures are demonstrated. On this basis a standardized basis of structural design can be formulated to convert the reliability principles (such as provided by ISO 2394) into operational design procedures (such as used by EN 1990 and other standards). It is concluded that reliability principles and models could contribute further to international harmonization of structural design. Y1 - 2015 U6 - https://doi.org/10.14288/1.0076062 PB - The University of British Columbia CY - Vancouver ER - TY - CHAP A1 - Diamantidis, Dimitris A1 - Holický, Milan A1 - Sýkora, Miroslav T1 - Risk and reliability acceptance criteria for civil engineering structures T2 - Structural Reliability and Modelling in Mechanics Conference, Ostrava, Czech Republic, May 2016 N2 - The specification of risk and reliability acceptance criteria is a key issue of structural design and verification of existing structures. Current target reliability levels in standards appear to have considerable scatter. Critical review of risk acceptance approaches to societal, economic and environmental risk indicates that an optimal design strategy is mostly dominated by economic aspects while human safety aspects need to be verified only in special cases. It is recommended to specify the target levels considering economic optimisation and the marginal life-saving costs principle, as both these approaches take into account the failure consequences and costs of safety measures. Y1 - 2016 SP - 1 EP - 10 ER - TY - CHAP A1 - Diamantidis, Dimitris A1 - Sýkora, Miroslav A1 - Barnardo-Viljoen, Celeste A1 - Retief, Johan Verster A1 - Rózsás, Árpád ED - Bakker, Jaap ED - Frangopol, Dan M. ED - Van Breugel, Klaas T1 - On Risk-Based Design of Structures Exposed to Changing Climatic Actions T2 - Life-Cycle of Engineering Systems : Emphasis on Sustainable Civil Infrastructure ; The Fifth International Symposium on Life-Cycle Civil Engineering (IALCCE 2016) 16-20 October 2016, Delft, The Netherlands Y1 - 2016 SN - 978-1-138-02847-0 SN - 978-1-315-37517-5 PB - Taylor & Francis CY - London ; Boca Raton ER - TY - CHAP A1 - Sýkora, Miroslav A1 - Holický, Milan A1 - Jung, Karel A1 - Diamantidis, Dimitris ED - Akiyama, Mitsuyoshi ED - Furuta, Hitoshi ED - Frangopol, Dan M. T1 - Target reliability levels for assessment of existing structures considering economic and societal aspects T2 - Life-Cycle of Structural Systems N2 - Specification of the target reliability levels is one of the key issues of the assessment of existing structures. ISO 13822:2010 and ISO 2394:1998 indicate procedures for deriving the target reliability levels by optimisation of the total cost related to an assumed remaining working life of a structure. In the submitted study this approach is applied to estimate the target reliability levels of an existing structural member in conjunction with the human safety criteria. Obtained results are critically compared with the recommendations given in present standards. It appears that the requirement on the same target reliability levels for existing structures as for new structures is uneconomical. Further, the cost optimisation seems to yield rather low reliability levels and human safety criteria become commonly decisive for specification of the target reliabilities of existing structures. Y1 - 2014 SN - 9780429227196 U6 - https://doi.org/10.1201/b17618-121 SP - 838 EP - 845 PB - CRC Press CY - London ER - TY - CHAP A1 - Sýkora, Miroslav A1 - Diamantidis, Dimitris A1 - Marková, Jana A1 - Masciotta, Maria Giovanna ED - Baričević, Ana ED - Jelčić Rukavina, Marija ED - Damjanović, Domagoi ED - Guadagnini, Maurizio T1 - Optimizing in-situ testing for historic masonry structures: a case study BT - a case study T2 - International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : Durability, Monitoring and Repair of Structures, 20-22 March 2019, Rovinj, Croatia Y1 - 2019 UR - http://toc.proceedings.com/50441webtoc.pdf SN - 978-1-5108-9296-5 SP - 684 EP - 691 PB - RILEM Publications ER - TY - JOUR A1 - Orcesi, André A1 - O'Connor, Alan A1 - Diamantidis, Dimitris A1 - Sýkora, Miroslav A1 - Wu, Teng A1 - Akiyama, Mitsuyoshi A1 - Alhamid, Abdul Kadir A1 - Schmidt, Franziska A1 - Pregnolato, Maria A1 - Li, Yue A1 - Salarieh, Babak A1 - Salman, Abdullahi M. A1 - Bastidas-Arteaga, Emilio A1 - Markogiannaki, Olga A1 - Schoefs, Franck T1 - Investigating the Effects of Climate Change on Structural Actions JF - Structural Engineering International N2 - The changing climate with resulting more extreme weather events will likely impact infrastructure assets and services. This phenomenon can present direct threats to the assets as well as significant indirect effects for those relying on the services those assets deliver. Such threats are path-dependent and place-specific, as they strongly depend on current and future climate variability, location, asset design life, function and condition. One key question is how climate change is likely to increase both the probability and magnitude of extreme weather events under different scenarios of climate change. To address this issue, this paper investigates selected effects of climate change and their consequences on structural performance, in the context of evolving loading scenarios in three different continental regions: Europe, North America, and Asia. The aim is to investigate some main place-specific changes of the exposure in terms of intensity/frequency of extreme events as well as the associated challenges, considering some recent activities of members of the IABSE TG6.1. Climate change can significantly affect built infrastructure and the society by increasing the occurrence and magnitude of extreme events and increasing potential losses. Therefore, specific relationships relating hazard levels and structural vulnerability to climate change effects should be determined. KW - climate change KW - extreme weather events KW - flooding KW - hurricanes KW - scour KW - sea-level rise KW - tsunami Y1 - 2022 U6 - https://doi.org/10.1080/10168664.2022.2098894 VL - 32 IS - 4 SP - 1 EP - 14 PB - Taylor & Francis ER - TY - JOUR A1 - Orcesi, André A1 - Diamantidis, Dimitris A1 - O’Connor, Alan A1 - Palmisano, Fabrizio A1 - Sýkora, Miroslav A1 - Boros, Vazul A1 - Caspeele, Robby A1 - Chateauneuf, Alaa A1 - Mandić Ivanković, Ana A1 - Lenner, Roman A1 - Kušter Marić, Marija A1 - Nadolski, Vitali A1 - Schmidt, Franziska A1 - Skokandić, Dominik A1 - van der Spuy, Pierre T1 - Investigating Partial Factors for the Assessment of Existing Reinforced Concrete Bridges JF - Structural Engineering International N2 - There is great interest in developing an adequate partial factor format for the assessment of existing structures, and in particular bridges, that should be able to take various aspects into account linked to the fact that the structure already exists. As the structure is existing, additional information related to material parameters, loading conditions, local structural defects, etc. can be accounted for. In addition, the degree of conservatism needs to be well balanced to avoid unnecessary investment of resources in replacement or retrofitting. This contribution considers the experience gained in recent years in parallel with some ongoing standardisation work in relation to Eurocodes and the next edition of the fib Model Code for new and existing concrete structures. The current state of the art of partial factors for the assessment of existing structures is explored and the differences are assessed based on a comparison between (i) the use of recommended fixed partial factors as provided in many national and international codes, (ii) adjusted (flexible) partial factors derived for the individual case under consideration, and (ii) reliability-based verification. In order to assess the adequacy of proposals and identify some differences, the available partial factor formats are applied to two case studies of reinforced concrete bridges and they are critically assessed. Y1 - 2023 U6 - https://doi.org/10.1080/10168664.2023.2204115 SP - 1 EP - 16 PB - Taylor & Francis ER - TY - CHAP A1 - Sykora, Miroslav A1 - Nadolski, Vitali A1 - Novak, Lukáš A1 - Novak, Drahomír A1 - Diamantidis, Dimitris T1 - Pilot comparison of semi-probabilistic methods applied to RC structures with multiple failure modes T2 - Concrete Innovation for Sustainability, 6th fib International Congress in Oslo, Norway (2022), proceedings, 12-16 June 2022, Oslo, Norway Y1 - 2022 SP - 1890 EP - 1899 PB - fib ER - TY - CHAP A1 - Orcesi, Andre A1 - Bastidas-Arteaga, Emilio A1 - Markogiannaki, Olga A1 - Li, Yue A1 - Schoefs, Franck A1 - Ballester, Jorge A1 - O'Connor, Alan A1 - Sýkora, Miroslav A1 - Imam, Boulent A1 - Pregnolato, Maria A1 - Stewart, Mark A1 - Ryan, Paraic A1 - Diamantidis, Dimitris A1 - Wu, Teng A1 - Schmidt, Franziska A1 - Kreislová, Kateřina A1 - Salman, Abdullahi M. T1 - Investigating the effects of climate change on structural resistance and actions T2 - IABSE Congress, Ghent 2021, Structural Engineering for Future Societal Needs: 22.02.2021 - 24.02.2021, Ghent, Belgium N2 - One major issue when considering the effects of climate change is to understand, qualify and quantify how natural hazards and the changing climate will likely impact infrastructure assets and services as it strongly depends on current and future climate variability, location, asset design life, function and condition. So far, there is no well-defined and agreed performance indicator that isolates the effects of climate change for structures. Rather, one can mention some key considerations on how climate change may produce changes of vulnerability due to physical and chemical actions affecting structural durability or changes of the exposure in terms of intensity/frequency of extreme events. This paper considers these two aspects and associated challenges, considering some recent activities of members of the IABSE TG6.1. KW - adaptation KW - climate change KW - Durability KW - extreme events KW - vulnerability Y1 - 2021 U6 - https://doi.org/10.2749/ghent.2021.0974 SP - 974 EP - 985 PB - International Association for Bridge and Structural Engineering (IABSE) CY - Zürich ER - TY - JOUR A1 - Pandey, Mahesh A1 - Viljoen, Celeste A1 - Way, Andrew A1 - Katharina Fischer, Katharina A1 - Sýkora, Miroslav A1 - Diamantidis, Dimitris A1 - Steenbergen, Raphaël D.J.M. A1 - Lind, Niels A1 - Frangopol, Dan M. A1 - Yang, David Y. A1 - Retief, Johan Verster A1 - André, João A1 - Nathwani, Jatin A1 - Lenner, Roman T1 - Life safety in the Reliability-Based design and assessment of structures JF - Structural Safety N2 - We review the developments in life safety and the incorporation thereof in the design and assessment of structures over the last 50 years. Various measures of life safety are presented that have been developed according to the marginal life saving cost principle based on individual, societal and economic considerations. Target probabilities of failure, or target reliabilities, are central to modern structural design and assessment. These are derived either through back-calibration to existing practice or through life cycle cost minimisation, both of which yield comparable safety levels, and are underpinned by lower bounds from life safety. Life cycle cost minimisation is reviewed here, which considers all direct and indirect costs of failure including loss of life and limb, as well as the costs and efficiency of increasing reliability. We discuss the incorporation of life safety into reliability-based design and assessment through the concept of the Life Quality Index, which uses key societal indicators, namely, the GDP and life expectancy, and health economics as a basis for specifying minimum reliabilities for both new and existing structures. The current state of advancement of reliability- and risk-informed design, and recommendations for future developments in life safety are considered. KW - Life safety KW - Structural assessment KW - Standardization KW - Reliability-based design KW - Risk-informed design Y1 - 2024 U6 - https://doi.org/10.1016/j.strusafe.2024.102453 PB - Elsevier ER - TY - JOUR A1 - Diamantidis, Dimitris A1 - Tanner, Peter A1 - Holicky, Milan A1 - Madsen, Henrik O. A1 - Sykora, Miroslav T1 - On reliability assessment of existing structures JF - Structural Safety N2 - This contribution discusses the reliability assessment of existing structures emphasizing on developments within or initiated by the JCSS. After a bibliographical review, the principles of reliability updating, i.e. Bayesian updating of random variables and updating of event probabilities are summarized. Developments in standards and established verification formats—partial factor or load and resistance factor, reliability-based, and risk-informed—are briefly presented and discussed. The impact of JCSS work in recent standards such as ISO 13822, the draft Eurocode prEN1990-2, and the fib Model Code 2020 as well as in national standards is highlighted. Criteria for defining target reliabilities for existing structures including human safety and optimization are critically reviewed. Obstacles for a wider implementation of reliability-based and risk-informed methods in practice are identified and conclusions for future developments are drawn. Finally, Annex A illustrates updating procedures for resistance variables and Annex B presents a case study. KW - Existing structures KW - Uncertainties KW - Updating KW - Target reliability KW - Reliability verification Y1 - 2024 U6 - https://doi.org/10.1016/j.strusafe.2024.102452 SN - 0167-4730 PB - Elsevier ER -