ISO INTERNATIONAL STANDARD 28841 First edition 2013-06-01 Guidelines for simplified seismic assessment and rehabilitation of concrete buildings Lignes directricespour I'evaluation sismique simplifiée etla reéhabilitation des structures en béton Reference number ISO 28841:2013(E) @ ISO 2013 IHSunder Not for Resale ISO28841:2013(E) COPYRIGHTPROTECTEDDOCUMENT ?ISO2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsoO'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 @ISO2013-Allrightsreserved yIHSunder nited without license from IHS Not for Resale ISO 28841:2013(E) Contents Page Foreword Introduction. ..vi 1 Scope 2 Normative references.. 3 Terms and definitions 2 4 Symbols and abbreviated terms ... .13 5 Limitations 17 5.1 Occupancy ... 5.2 Maximum number of stories. 5.3 Maximum aspect ratios.... 5.4 Maximum story height.. 18 5.5 Maximum difference in story height.. 5.6 Maximum difference in floor area.... 18 5.7 Maximum difference in story mass 5.8 Maximum column offset . 18 5.9 Maximum span length.. 5.10 Maximumdifferenceinspanlength 18 5.11 Maximumcantileverspan... 18 5.12 Maximum slope for slabs, girders, beams and joists... 5.13 19 5.14 Distance between center of mass and center of rigidity. 19 6 Assessment and rehabilitation procedure.... 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 6.6 Structural assessment... 21 6.7 Rehabilitation design .. 6.8 Rehabilitationconstruction 21 6.9 Design documentation.. 7 General Guides .... 23 7.1 .23 7.2 Utimate limit state design format.... 7.3 Serviceability limit state design format... .24 8 Classification of the structure system of the building 8.1 Concrete frame systems... 24 8.2 Concrete wall systems.... 8.3 Concretedualsystems 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....... 9.4 Finalassessment.. 41 10 Condition assessment of existing structures .. 41 10.1 Vulnerability level.. 41 10.2 Actual condition of the structure.. .42 ii Copyrght International Organization for Standardizalonghts reserved se from IHS Not for Resale