A risk-consistent approach to determine EN1998 behaviour factors for lateral load resisting systems. Issue 131 (April 2020)

• Record Type: Journal Article
• Authors: Vamvatsikos, Dimitrios; Bakalis, Konstantinos; Kohrangi, Mohsen; Pyrza, Stella; Castiglioni, Carlo Andrea; Kanyilmaz, Alper; Morelli, Francesco; Stratan, Aurel; D' Aniello, Mario; Calado, Luis; Proença, Jorge Miguel; Degee, Hervé; Hoffmeister, Benno; Pinkawa, Marius; Thanopoulos, Pavlos; Vayas, Ioannis
• Is Part Of: Soil dynamics and earthquake engineering. Issue 131(2020)
• Publication Date: 2020-04
• Subjects: Performance-based earthquake engineering -- Seismic risk -- Behaviour factor -- Uncertainty -- Eurocodes -- Steel structures; Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2019.106008
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: A risk-consistent approach is proposed for the evaluation of behaviour factors that are compatible with Eurocode 8, using nonlinear static and dynamic analysis. It comprises seven discrete steps, involving hazard assessment and record selection at multiple sites, designing and modelling multiple archetype buildings and assessing their performance vis-à-vis target safety objectives. In all cases, uncertainty is incorporated and propagated to the final results whereby a flexible verification procedure is offered to account for the confidence of the investigator on the data available. An example application is offered on steel concentrically braced frames, highlighting the need for selecting appropriate performance targets for Europe. The overall added value goes beyond the current state of art, offering a consistent risk basis for the seismic design of different systems that is compatible with current uniform hazard design spectra and can benefit from future risk-targeted hazard maps. Highlights: A risk-consistent approach is proposed for deriving EN1998 compatible behaviour factors. Hazard assessment, record selection and incorporation of uncertainty are important aspects of the approach. Setting appropriate performance targets is required to achieve consistency with current EN1998 implied safety. An example is shown for steel concentrically braced frames.