ISO INTERNATIONAL STANDARD 2394 Fourthedition 2015-03-01 General principles on reliability for structures Principes genéraux de la fiabilité des constructions Reference number ISO 2394:2015(E) LSO International Organization for Standardization Zhejang Institute of Standardization 5956617 IS02015 vided by IHS underI Not for Resale, 2015/6/2 07:05:33 mitted without license from IHS IS0 2394:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland Prganizationfor Standardization etworking permitted without license from IHS IS0 2394:2015(E) Contents Page Foreword ..vi Introduction. ..vi 1 Scope. 2 Terms and definitions 2.1 General terms. ..1 2.2 Terms related to design and assessment. 2.3 Terms related to actions, action effects, and environmental influences ..8 2.4 Terms related to structural response, resistance, material properties, and geometrical quantities ..11 3 Symbols. ..12 3.1 General ..12 3.2 Latin upper case letters ..12 3.3 Latin lower case letters. .13 3.4 Greekletters .13 3.5 Subscripts. .14 4 Fundamentals .14 4.1 General .14 4.2 Aims and requirements to structures .14 4.2.1 Fundamental requirements to structures ..14 4.2.2 Target performance level. .15 4.3 Conceptual basis. 16 4.3.1 Decisions concerning structures .16 4.3.2 Structural performance modelling .17 4.3.3 Uncertainty and treatment of knowledge .17 4.4 Approaches. .18 4.4.1 General. .18 4.4.2 Risk-informed and reliability-based approaches .18 4.4.3 Semi-probabilistic approaches. 20 4.5 Documentation 20 5 Performance modelling. .21 5.1 General 21 5.1.1 Structural performance and limit state concept 21 5.1.2 Performance and performance indicators.. 21 5.1.3 Basic performance requirement and design situations 21 5.1.4 Levels of verification. .21 5.2 Performance model. 22 5.2.1 General 22. 5.2.2 Time-dependent aspects 22 5.2.3 System aspects. 22 5.3 Limit states. 23 5.3.1 Ultimate limit state. .23 5.3.2 Serviceability limit states .23 5.3.3 Condition limit states. 24 5.3.4 Limit state function. 24 iii see=Zhejiang Institute of Standardization 5956617 ed without license from IHS Not for Resale, 2015/6/2 07:05:33