Ingeniero Civil

ANSI/AISC 341-10 An American National Standard

Seismic Provisions for Structural Steel Buildings
June 22, 2010 Supersedes the Seismic Provisions for Structural Steel Buildings dated March 9, 2005, Supplement No. 1 dated November 16, 2005, and all previous versions

Approved by the AISC Committee on Specifications

AMERICAN INSTITUTE OF STEEL CONSTRUCTION One East Wacker Drive, Suite 700Chicago, Illinois 60601-1802

Copyright © 2010 by American Institute of Steel Construction All rights reserved. This book or any part thereof must not be reproduced in any form without the written permission of the publisher. The AISC logo is a registered trademark of AISC. The information presented in this publication has been prepared in accordance with recognized engineering principles and isfor general information only. While it is believed to be accurate, this information should not be used or relied upon for any specific application without competent professional examination and verification of its accuracy, suitability and applicability by a licensed professional engineer, designer or architect. The publication of the material contained herein is not intended as a representationor warranty on the part of the American Institute of Steel Construction or of any other person named herein, that this information is suitable for any general or particular use or of freedom from infringement of any patent or patents. Anyone making use of this information assumes all liability arising from such use. Caution must be exercised when relying upon other specifications and codesdeveloped by other bodies and incorporated by reference herein since such material may be modified or amended from time to time subsequent to the printing of this edition. The Institute bears no responsibility for such material other than to refer to it and incorporate it by reference at the time of the initial publication of this edition. Printed in the United States of America First Printing: September2011 Second Printing: January 2012 Third Printing: September 2012

Seismic Provisions for Structural Steel Buildings, June 22, 2010 AMERICAN INSTITUTE OF STEEL CONSTRUCTION

9.1–iii

PREFACE
This Preface is not a part of ANSI/AISC 341-10, Seismic Provisions for Structural Steel Buildings, but is included for informational purposes only. The AISC Specification for Structural SteelBuildings (ANSI/AISC 360-10) is intended to cover common design criteria. Accordingly, it is not feasible for it to also cover all of the special and unique problems encountered within the full range of structural design practice. This document, the AISC Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-10) (hereafter referred to as the Provisions) is a separate consensus standard thataddresses one such topic: the design and construction of structural steel and composite structural steel/reinforced concrete building systems for high-seismic applications. A list of Symbols and a Glossary are part of this document. Terms that appear in the Glossary are generally italicized where they first appear in a sub-section, throughout these Provisions. A nonmandatory Commentary with backgroundinformation is also provided. Nonmandatory user notes are interspersed throughout these Provisions to provide guidance on the application of the document. This edition of the AISC Seismic Provisions for Structural Steel Buildings was developed in concert with both ANSI/AISC 360-10 and ASCE/SEI 7-10, Minimum Design Loads for Buildings and Other Structures. This will allow these Provisions to beincorporated by reference into the 2012 IBC, which will use ASCE/SEI 7-10 as its basis of design for loadings. Some of the most significant modifications to this edition of these Provisions are related to format. The organization of the chapters has been changed to be more consistent with that of ANSI/AISC 360-10. In the 2005 edition, these Provisions separated the requirements for structural...