ISO 28841:2013
(Main)Guidelines for simplified seismic assessment and rehabilitation of concrete buildings
Guidelines for simplified seismic assessment and rehabilitation of concrete buildings
The purpose of ISO 28841:2013 is to provide sufficient information to perform the seismic assessment and rehabilitation of the structural concrete building that complies with the limitations established in ISO 28841:2013, for both undamaged structures that are deemed not to comply with the required characteristics for an adequate response at a specified performance level, and for structures that have undergone damage under seismic loadings. The rules of design as set forth in ISO 28841:2013 are simplifications of more elaborate requirements. ISO 28841:2013 can be used as an alternative to the development of a building code, or equivalent document in countries where no national design codes are available by themselves, or as an alternative to the building code in countries where specifically considered and accepted by the national standards body or other appropriate regulatory organization, and applies to the assessment of earthquake resistance capability and to the seismic rehabilitation design and construction for existing structural concrete buildings.
Lignes directrices pour l'évaluation sismique simplifiée et la réhabilitation des structures en béton
Smernice za poenostavljene ocene potresne varnosti in sanacijo betonskih zgradb
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 28841
First edition
2013-06-01
Guidelines for simplified seismic
assessment and rehabilitation of
concrete buildings
Lignes directrices pour l'évaluation sismique simplifiée et la
réhabilitation des structures en béton
Reference number
©
ISO 2013
© ISO 2013
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
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 copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
Contents Page
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 13
5 Limitations . 17
5.1 Occupancy . 17
5.2 Maximum number of stories . 18
5.3 Maximum aspect ratios . 18
5.4 Maximum story height . 18
5.5 Maximum difference in story height . 18
5.6 Maximum difference in floor area . 18
5.7 Maximum difference in story mass . 18
5.8 Maximum column offset . 18
5.9 Maximum span length . 18
5.10 Maximum difference in span length . 18
5.11 Maximum cantilever span . 18
5.12 Maximum slope for slabs, girders, beams and joists . 19
5.13 Maximum slope of the terrain . 19
5.14 Distance between center of mass and center of rigidity . 19
6 Assessment and rehabilitation procedure. 19
6.1 Procedure outline . 19
6.2 Data collection . 20
6.3 Lateral load resisting system classification . 21
6.4 Material assessment . 21
6.5 Condition assessment . 21
6.6 Structural assessment . 21
6.7 Rehabilitation design . 21
6.8 Rehabilitation construction . 21
6.9 Design documentation . 21
7 General Guides . 23
7.1 Limit states . 23
7.2 Ultimate limit state design format . 23
7.3 Serviceability limit state design format . 24
8 Classification of the structure system of the building . 24
8.1 Concrete frame systems . 24
8.2 Concrete wall systems . 24
8.3 Concrete dual systems . 25
9 Condition assessment of structures damaged by a seismic event . 25
9.1 Material assessment . 25
9.2 Condition Assessment . 28
9.3 Structural assessment . 41
9.4 Final assessment . 41
10 Condition assessment of existing structures . 41
10.1 Vulnerability level . 41
10.2 Actual condition of the structure . 42
10.3 Seismic hazard . 43
10.4 Architectural layout . 45
10.5 Foundation . 50
10.6 Soil type . 50
10.7 Quality aspects . 50
10.8 Structural assessment . 51
10.9 Final assessment . 52
11 Rehabilitation analysis and design . 54
11.1 Concrete Frame Systems . 54
11.2 Concrete wall systems . 54
11.3 Concrete frames with concrete infills . 55
11.4 Foundation rehabilitation . 55
11.5 Rehabilitation Measures for the structural system . 55
12 Rehabilitation construction . 57
12.1 Demolitions and debris retrieval . 57
12.2 Cover retrieval . 57
12.3 Surface preparations . 57
12.4 Adherence concerns . 58
12.5 Durability concerns . 58
Annex A (normative) Structural Assessment . 59
A.1 Resistance . 59
A.2 Story drift . 63
A.3 Energy dissipation level . 65
A.4 Equivalent equations for material factors . 69
A.5 Equivalent equations for material factors . 73
Bibliography . 76
iv © ISO 2013 – All rights reserved
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 body 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 71, Concrete, reinforced concrete and pre-stressed
concrete, Subcommittee SC 5, Simplified design standard for concrete structures.
Introduction
The aim of this International Standard is to provide rules for the earthquake resistant assessment and
rehabilitation design and execution for existing structural concrete buildings for which simplified procedures
may be applied instead of more sophisticated and thorough analyses, in light of the simplicity, symmetry, and
other characteristics of the structure under study. This International Standard is developed for countries that
do not have existing national standards on this subject and to offer, to local regulatory authorities anywhere,
an alternative for the study of relatively small and simple buildings that abound in both rural and urban
environments. The analysis and design rules are based in simplified worldwide-accepted strength models.
This International Standard is self-contained; therefore actions (loads), simplifie
...
INTERNATIONAL ISO
STANDARD 28841
First edition
2013-06-01
Guidelines for simplified seismic
assessment and rehabilitation of
concrete buildings
Lignes directrices pour l'évaluation sismique simplifiée et la
réhabilitation des structures en béton
Reference number
©
ISO 2013
© ISO 2013
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
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 copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
Contents Page
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 13
5 Limitations . 17
5.1 Occupancy . 17
5.2 Maximum number of stories . 18
5.3 Maximum aspect ratios . 18
5.4 Maximum story height . 18
5.5 Maximum difference in story height . 18
5.6 Maximum difference in floor area . 18
5.7 Maximum difference in story mass . 18
5.8 Maximum column offset . 18
5.9 Maximum span length . 18
5.10 Maximum difference in span length . 18
5.11 Maximum cantilever span . 18
5.12 Maximum slope for slabs, girders, beams and joists . 19
5.13 Maximum slope of the terrain . 19
5.14 Distance between center of mass and center of rigidity . 19
6 Assessment and rehabilitation procedure. 19
6.1 Procedure outline . 19
6.2 Data collection . 20
6.3 Lateral load resisting system classification . 21
6.4 Material assessment . 21
6.5 Condition assessment . 21
6.6 Structural assessment . 21
6.7 Rehabilitation design . 21
6.8 Rehabilitation construction . 21
6.9 Design documentation . 21
7 General Guides . 23
7.1 Limit states . 23
7.2 Ultimate limit state design format . 23
7.3 Serviceability limit state design format . 24
8 Classification of the structure system of the building . 24
8.1 Concrete frame systems . 24
8.2 Concrete wall systems . 24
8.3 Concrete dual systems . 25
9 Condition assessment of structures damaged by a seismic event . 25
9.1 Material assessment . 25
9.2 Condition Assessment . 28
9.3 Structural assessment . 41
9.4 Final assessment . 41
10 Condition assessment of existing structures . 41
10.1 Vulnerability level . 41
10.2 Actual condition of the structure . 42
10.3 Seismic hazard . 43
10.4 Architectural layout . 45
10.5 Foundation . 50
10.6 Soil type . 50
10.7 Quality aspects . 50
10.8 Structural assessment . 51
10.9 Final assessment . 52
11 Rehabilitation analysis and design . 54
11.1 Concrete Frame Systems . 54
11.2 Concrete wall systems . 54
11.3 Concrete frames with concrete infills . 55
11.4 Foundation rehabilitation . 55
11.5 Rehabilitation Measures for the structural system . 55
12 Rehabilitation construction . 57
12.1 Demolitions and debris retrieval . 57
12.2 Cover retrieval . 57
12.3 Surface preparations . 57
12.4 Adherence concerns . 58
12.5 Durability concerns . 58
Annex A (normative) Structural Assessment . 59
A.1 Resistance . 59
A.2 Story drift . 63
A.3 Energy dissipation level . 65
A.4 Equivalent equations for material factors . 69
A.5 Equivalent equations for material factors . 73
Bibliography . 76
iv © ISO 2013 – All rights reserved
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 body 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 71, Concrete, reinforced concrete and pre-stressed
concrete, Subcommittee SC 5, Simplified design standard for concrete structures.
Introduction
The aim of this International Standard is to provide rules for the earthquake resistant assessment and
rehabilitation design and execution for existing structural concrete buildings for which simplified procedures
may be applied instead of more sophisticated and thorough analyses, in light of the simplicity, symmetry, and
other characteristics of the structure under study. This International Standard is developed for countries that
do not have existing national standards on this subject and to offer, to local regulatory authorities anywhere,
an alternative for the study of relatively small and simple buildings that abound in both rural and urban
environments. The analysis and design rules are based in simplified worldwide-accepted strength models.
This International Standard is self-contained; therefore actions (loads), simplifie
...
SLOVENSKI STANDARD
01-november-2010
Smernice za poenostavljene ocene potresne varnosti in sanacijo betonskih
zgradb
Guidelines for simplified seismic assessment and rehabilitation of concrete buildings
Norme pour l'évaluation sismique simplifiée et la réhabilitation des structures en béton
Ta slovenski standard je istoveten z: ISO/DIS 28841
ICS:
91.080.40 Betonske konstrukcije Concrete structures
91.120.25 =DãþLWDSUHGSRWUHVLLQ Seismic and vibration
YLEUDFLMDPL protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT INTERNATIONAL STANDARD ISO/DIS 28841
ISO/TC 71/SC 5 Secretariat: ICONTEC
Voting begins on: Voting terminates on:
2010-06-15 2010-11-15
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Guidelines for simplified seismic assessment and rehabilitation
of concrete buildings
Norme pour l'évaluation sismique simplifiée et la réhabilitation des structures en béton
ICS 91.080.40
In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué
en version anglaise seulement.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
©
International Organization for Standardization, 2010
ISO/DIS 28841
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall
not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the
unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying,
recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to 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 copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
©
ii ISO 2010 – All rights reserved
ISO/DIS 28841
Contents Page
Foreword .v
Introduction.vi
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Symbols (and abbreviated terms).13
5 Limitations .23
5.1 Occupancy .23
5.1.1 Permitted occupancy .23
5.1.2 Mixed occupancy.24
5.2 Maximum number of stories .24
5.3 Maximum aspect ratios.24
5.4 Maximum story height .24
5.5 Maximum span length.25
5.6 Maximum difference in span length .25
5.7 Maximum cantilever span.25
5.8 Maximum slope for slabs, girders, beams and joists.25
5.9 Maximum slope of the terrain .25
5.10 Distance between center of mass and center of rigidity.25
6 Assessment and rehabilitation procedure.26
6.1 Procedure outline.26
6.2 Data collection.27
6.3 Lateral load resisting system classification.27
6.4 Material assessment .27
6.5 Condition assessment .27
6.6 Structural assessment.27
6.7 Rehabilitation design .27
6.8 Rehabilitation construction.27
6.9 Design documentation.28
6.9.1 Assessment record .28
6.9.2 Rehabilitation calculation memoir.28
6.9.3 Geotechnical report.28
6.9.4 Structural drawings.28
6.9.5 Specifications .29
7 General Guides.29
7.1 Limit states.29
7.2 Ultimate limit state design format.29
7.2.1 General .29
7.2.2 Required factored strength .30
7.3 Serviceability limit state design format.30
8 Classification of the structure system of the building .31
8.1 Concrete frame systems.31
8.2 Concrete wall systems.31
8.3 Concrete dual systems .31
9 Condition assessment of structures damaged by a seismic event .32
9.1 Material assessment .32
9.1.1 Material properties .33
DRAFT 2010
ISO/DIS 28841
9.1.2 Component properties . 33
9.1.3 Test methods. 34
9.1.4 Minimum number of tests . 34
9.1.5 Soundness. 35
9.2 Condition Assessment. 35
9.2.1 Layout of structural damages . 35
9.2.2 Damage levels. 37
9.2.3 Layout of non structural damages. 50
9.3 Structural assessment . 51
9.4 Final assessment. 51
10 Condition assessment of existing structures.51
10.1 Vulnerability level . 52
10.2 Actual condition of the structure . 52
10.3 Seismic hazard. 53
10.3.1 No seismic hazard zones . 56
10.3.2 Low seismic hazard zones. 56
10.3.3 Intermediate seismic hazard zones . 56
10.3.4 High seismic hazard zones. 56
10.4 Architectural layout . 56
10.4.1 Plan irregularity. 56
10.4.2 Elevation irregularity . 58
10.5 Foundation .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.