Seismic Provisions for Structural Steel Buildings

476 Pages·2017·13.25 MB·English

ANSI/AISC 341-16
An American National Standard
Seismic Provisions
for Structural Steel Buildings
July 12, 2016
Supersedes the Seismic Provisions for Structural Steel Buildings
dated June 22, 2010 and all previous versions
Approved by the Committee on Specifications
AMERICAN INSTITUTE OF STEEL CONSTRUCTION
130 East Randolph Street, Suite 2000, Chicago, Illinois 60601
www.aisc.org
Blue_Cover_A341-16.indd 1 5/15/2017 11:37:03 AM

ANSI/AISC 341-16
An American National Standard
Seismic Provisions
for Structural Steel Buildings
July 12, 2016
Supersedes the Seismic Provisions for Structural Steel Buildings
dated June 22, 2010 and all previous versions
Approved by the Committee on Specifications
AMERICAN INSTITUTE OF STEEL CONSTRUCTION
130 East Randolph Street, Suite 2000, Chicago, Illinois 60601
www.aisc.org
AISC_SP SPEC 341_01_FM.indd 1 5/5/17 1:45 PM
9.1-ii
AISC © 2016
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 by a balanced committee
following American National Standards Institute (ANSI) consensus procedures and
recognized principles of design and construction. 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 engineer or architect. The publication of this information is not a representation
or warranty on the part of the American Institute of Steel Construction, its officers, agents,
employees or committee members, 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. All representations or warranties, express or implied, other than as stated above, are
specifically disclaimed. Anyone making use of the information presented in this publication
assumes all liability arising from such use.
Caution must be exercised when relying upon standards and guidelines developed 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 American Institute of Steel
Construction 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
Seismic Provisions for Structural Steel Buildings, July 12, 2016
American Institute of Steel Construction
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9.1-iii
PREFACE
(This Preface is not a part of ANSI/AISC 341-16, Seismic Provisions for Structural Steel
Buildings, but is included for informational purposes only.)
AISC 360, Specification for Structural Steel Buildings (ANSI/AISC 360-16) 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 prac-
tice. This document, Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-16)
(hereafter referred to as the Provisions), is a separate consensus standard that addresses one
such topic: the design and construction of structural steel and composite structural steel/
reinforced concrete building systems specifically detailed for seismic resistance.
The Symbols, Glossary, and Abbreviations are all considered part of this document.
Accompanying the Provisions is a nonmandatory Commentary with background infor-
mation and nonmandatory user notes interspersed throughout to provide guidance on the
specific application of the document.
A number of significant technical modifications have also been made since the 2010 edi-
tion of the Provisions, including the following:
• Inclusion of ASTM A1085/A1085M material
• New provisions for diaphragms, chords and collectors, particularly horizontal
truss diaphragms
• Inclusion of R in Table D1.1 for more accurate slenderness limits and to avoid
y
use of lower F values for dual-certified material
y
• Requirement that simultaneous inelasticity be considered for columns partici-
pating in two or more seismic force resisting systems
• Clearer provisions on required strength of column splices and bases, including
a reduced shear for column bases, returning the requirements to closer to those
in the 2005 Provisions
• Allowance for non-full strength connections in special moment frames
• Option to use partial-joint-penetration groove welds in moment-frame column
splices
• Revised and clarified continuity plate, doubler plate, and associated welding
provisions
• Multi-tiered braced frame provisions for ordinary concentrically braced frames,
special concentrically braced frames, and buckling-restrained braced frames
• Numerous revisions to special plate shear wall requirements
• New application of composite plate shear wall system using concrete-filled
steel panel walls
• Power-actuated fasteners permitted in the protected zone up to a certain diameter
• New criteria to prequalify connections for composite moment frames
Seismic Provisions for Structural Steel Buildings, July 12, 2016
American Institute of Steel Construction
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9.1-iv PREFACE
The AISC Committee on Specifications, Task Committee 9—Seismic Design is responsi-
ble for the ongoing development of these Provisions. The AISC Committee on Specifications
gives final approval of the document through an ANSI-accredited balloting process, and
has enhanced these Provisions through careful scrutiny, discussion and suggestions for
improvement. The contributions of these two groups, comprising well more than 80 struc-
tural engineers with experience from throughout the structural steel industry, is gratefully
acknowledged. AISC further acknowledges the significant contributions of the Building
Seismic Safety Council (BSSC), the Federal Emergency Management Agency (FEMA), the
National Science Foundation (NSF), and the Structural Engineers Association of California
(SEAOC).
This specification was approved by the Committee on Specifications:
R. Shankar Nair, Chairman Mark V. Holland
Patrick J. Fortney, Vice-Chairman John D. Hooper
Allen Adams Nestor R. Iwankiw
Taha D. Al-Shawaf William P. Jacobs, V
William F. Baker Ronald J. Janowiak
John M. Barsom, Emeritus Lawrence A. Kloiber
Reidar Bjorhovde Lawrence F. Kruth
Roger L. Brockenbrough, Emeritus Jay W. Larson
Charles J. Carter Roberto T. Leon
Gregory G. Deierlein James O. Malley
Carol J. Drucker Duane K. Miller
W. Samuel Easterling Larry S. Muir
Duane S. Ellifritt, Emeritus Thomas M. Murray
Bruce R. Ellingwood, Emeritus Douglas A. Rees-Evans
Michael D. Engelhardt Rafael Sabelli
Shu-Jin Fang, Emeritus Thomas A. Sabol
Steven J. Fenves, Emeritus Benjamin W. Schafer
James M. Fisher Robert E. Shaw, Jr.
John W. Fisher, Emeritus Donald R. Sherman
Theodore V. Galambos, Emeritus W. Lee Shoemaker
Louis F. Geschwindner William A. Thornton
Ramon E. Gilsanz Raymond H.R. Tide, Emeritus
Lawrence G. Griffis Chia-Ming Uang
John L. Gross, III Amit H. Varma
Jerome F. Hajjar Donald W. White
Patrick M. Hassett Ronald D. Ziemian
Tony C. Hazel Cynthia J. Duncan, Secretary
Richard A. Henige, Jr.
The Committee honors former members, David L. McKenzie, Richard C. Kaehler and
Keith Landwehr, and advisory member, Fernando Frias, who passed away during this cycle.
Seismic Provisions for Structural Steel Buildings, July 12, 2016
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PREFACE 9.1-v
The Committee gratefully acknowledges the following task committee (TC 9—Seismic
Design) for their development of this document.
James O. Malley, Chairman Roberto T. Leon
C. Mark Saunders, Vice Chairman Bonnie E. Manley
Michel Bruneau Patrick S. McManus
Gregory G. Deierlein John A. Rolfes
Richard M. Drake Rafael Sabelli
Michael D. Engelhardt Thomas A. Sabol
Timothy P. Fraser Bahram M. Shahrooz
Subhash C. Goel Robert E. Shaw, Jr.
Jerome F. Hajjar W. Lee Shoemaker
Ronald O. Hamburger Kurt D. Swensson
James R. Harris Robert Tremblay
Patrick M. Hassett Jamie Winans
John D. Hooper Leigh Arber, Secretary
Lawrence Kloiber
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9.1-vii
TABLE OF CONTENTS
SYMBOLS ............................................................xxxi
GLOSSARY .........................................................xxxviii
ABBREVIATIONS ......................................................xlv
PROVISIONS
A. GENERAL REQUIREMENTS ....................................... 1
A1. Scope ....................................................... 1
A2. Referenced Specifications, Codes and Standards ..................... 2
A3. Materials ..................................................... 3
1. Material Specifications ..................................... 3
2. Expected Material Strength .................................. 4
3. Heavy Sections ........................................... 5
4. Consumables for Welding ................................... 6
4a. Seismic Force-Resisting System Welds ........................ 6
4b. Demand Critical Welds ..................................... 6
5. Concrete and Steel Reinforcement ............................ 7
A4. Structural Design Drawings and Specifications ....................... 7
1. General ................................................. 7
2. Steel Construction ......................................... 8
3. Composite Construction .................................... 8
B. GENERAL DESIGN REQUIREMENTS ............................... 9
B1. General Seismic Design Requirements ............................. 9
B2. Loads and Load Combinations .................................... 9
B3. Design Basis ................................................. 10
1. Required Strength ........................................ 10
2. Available Strength ........................................ 10
B4. System Type ................................................. 10
B5. Diaphragms, Chords and Collectors .............................. 10
1. General ................................................ 10
2. Truss Diaphragms ........................................ 10
C. ANALYSIS ....................................................... 12
C1. General Requirements ......................................... 12
C2. Additional Requirements ....................................... 12
C3. Nonlinear Analysis ............................................ 12
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9.1-viii TABLE OF CONTENTS
D. GENERAL MEMBER AND CONNECTION
DESIGN REQUIREMENTS ........................................ 13
D1. Member Requirements ......................................... 13
1. Classification of Sections for Ductility ........................ 13
1a. Section Requirements for Ductile Members .................... 13
1b. Width-to-Thickness Limitations of Steel and Composite Sections ... 13
2. Stability Bracing of Beams ................................. 17
2a. Moderately Ductile Members ............................... 17
2b. Highly Ductile Members ................................... 18
2c. Special Bracing at Plastic Hinge Locations .................... 18
3. Protected Zones .......................................... 20
4. Columns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4a. Required Strength ........................................ 20
4b. Encased Composite Columns ............................... 20
4c. Filled Composite Columns ................................. 23
5. Composite Slab Diaphragms ................................ 23
5a. Load Transfer ........................................... 23
5b. Nominal Shear Strength ................................... 23
6. Built-Up Structural Steel Members ........................... 24
D2. Connections ................................................. 24
1. General ................................................ 24
2. Bolted Joints ............................................ 24
3. Welded Joints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4. Continuity Plates and Stiffeners ............................. 25
5. Column Splices .......................................... 26
5a. Location of Splices ....................................... 26
5b. Required Strength ........................................ 26
5c. Required Shear Strength ................................... 27
5d. Structural Steel Splice Configurations ........................ 27
5e. Splices in Encased Composite Columns ....................... 27
6. Column Bases ........................................... 27
6a. Required Axial Strength ................................... 28
6b. Required Shear Strength ................................... 28
6c. Required Flexural Strength ................................. 29
7. Composite Connections .................................... 30
8. Steel Anchors ............................................ 31
D3. Deformation Compatibility of Non-SFRS Members and Connections .... 31
D4. H-Piles ..................................................... 32
1. Design Requirements ..................................... 32
2. Battered H-Piles ......................................... 32
3. Tension ................................................ 32
4. Protected Zone ........................................... 32
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