ISO 16204-2012 Durability - Service life design of concrete structures《耐用性 混凝土结构使用寿命设计》.pdf
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1、 ISO 2012 Durability Service life design of concrete structures Durabilit Conception de la dure de vie des structures en bton INTERNATIONAL STANDARD ISO 16204 First edition 2012-09-01 Reference number ISO 16204:2012(E) ISO 16204:2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT IS
2、O 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the
3、 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 copyrightiso.org Web www.iso.org Published in Switzerland ISO 16204:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Norm
4、ative references . 1 3 T erms and definitions . 2 4 Symbols and abbreviated terms . 5 4.1 Abbreviated terms . 5 4.2 Main letters 5 4.3 Subscripts . 6 5 Basis of design 6 5.1 Requirements . 6 5.2 Principles of limit state design 7 5.3 Basic variables . 8 5.4 V erification 8 6 V erification of service
5、 life design 10 6.1 Carbonation-induced corrosion - uncracked concrete .10 6.2 Chloride-induced corrosion - uncracked concrete 13 6.3 Influence of cracks upon reinforcement corrosion .14 6.4 Risk of depassivation with respect to pre-stressed steel 15 6.5 Freeze/thaw attack 15 6.6 Chemical attack .17
6、 6.7 Alkali-aggregate reactions 18 7 Execution .19 7.1 General .19 7.2 Execution specification .19 7.3 Formwork .19 7.4 Materials .19 7.5 Inspection 20 7.6 Action in the event of non-conformity .20 8 Maintenance and condition assessment 20 8.1 General .20 8.2 Maintenance 20 8.3 Condition assessment
7、.21 9 Action in the event of non-conformity .21 Annex A (informative) Basis of design 22 Annex B (informative) V erification of service life design .24 Annex C (informative) Execution 28 Annex D (informative) Maintenance and condition assessment .29 Annex E (informative) Guidance on a national annex
8、 30 Bibliography .31 ISO 16204:2012(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member bod
9、y interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrote
10、chnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by
11、 the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig
12、hts. ISO shall not be held responsible for identifying any or all such patent rights. ISO 16204 was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre-stressed concrete, Subcommittee SC 3, Concrete production and execution of concrete structures. iv ISO 2012 All rights
13、reserved ISO 16204:2012(E) Introduction This International Standard is based on the principles given in ISO 2394, General principles on reliability for structures, ISO 13823, General principles on the design of structures for durability, and fib 1)“Model Code for Service Life Design” 1(MC SLD, today
14、 implemented in fib Model Code 2010 2 ). The two International Standards were prepared by ISO/TC 98, Bases for design of structures. The limit-states method, as developed in ISO 2394, has been adopted and used for preparing and harmonizing national and regional standards for structural design around
15、 the world. The objective of ISO 13823 is to provide a framework for the development of standards to predict the service life of components of a structure and to ensure that these principles are incorporated in the material-specific standards developed by other ISO Technical Committees. The objectiv
16、e of fib MC SLD is to implement the principles of ISO 2394 in service life design of concrete structures. This International Standard treats design for environmental actions leading to deterioration of concrete and embedded steel. The flowchart in Figure 1 illustrates the flow of decisions and the d
17、esign activities needed in a rational service life design process with a chosen level of reliability. Two strategies have been adopted; in the first, three levels of sophistication are distinguished. In total, four options are available. Strategy 1: Design to resist deteriorationLevel 1 Full probabi
18、listic method (option 1)Level 2 Partial factor method (option 2)Level 3 Deemed-to-satisfy method (option 3) Strategy 2: Avoidance-of-deterioration method, (option 4) Establishing the serviceability criteria Establishing the general layout, the dimensions and selection of materials Verification by th
19、e “Full probabilistic” method Involving: * Probabilistic models - resistance - loads/exposure - geometry * Limit states Verification by the “Partial factor” method. Involving: * Design values - characteristic values - partial factors * Design equations * Limit states Verification by the “Deemed-to-
20、satisfy” method. Involving: Exposure classes, limit states and other design provisions Verification by the “Avoidance of deterioration” method. Involving: Exposure classes, limit states and other design provisions Execution specification Maintenance plan Condition assessment plan Execution of the st
21、ructure Inspection of execution Maintenance Condition assessments during operational service life In the case of non-conformity to the performance criteria, the structure becomes obsolete or subject to full or partial redesign Figure 1 Flowchart for service life design 1) The International Federatio
22、n for Structural Concrete. ISO 2012 All rights reserved v ISO 16204:2012(E) Within Clause 6 the following deterioration mechanisms are addressed: carbonation-induced corrosion; chloride-induced corrosion; freeze/thaw attack without de-icing agents or sea-water; freeze/thaw attack with de-icing agent
23、s or sea-water. For these mechanisms widely accepted mathematical models exist. The other deterioration mechanisms: chemical attack, and alkali-aggregate reactions, are not treated in detail primarily because widely accepted mathematical models do not exist at present. To make this International Sta
24、ndard complete, the missing models have to be developed and comply with the general principles of Clause 5. This International Standard includes four informative annexes giving background information for the application in service life design and one informative annex giving guidance for the prepara
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