1、StructuralWelding CodeSeismicSupplementAWS D1.8/D1.8M:2009An American National Standard550 N.W. LeJeune Road, Miami, FL 33126AWS D1.8/D1.8M:2009An American National StandardApproved by theAmerican National Standards InstituteMay 5, 2009Structural Welding CodeSeismic Supplement2nd EditionSupersedes A
2、WS D1.8/D1.8M:2005Prepared by theAmerican Welding Society (AWS) D1 Committee on Structural WeldingUnder the Direction of theAWS Technical Activities CommitteeApproved by theAWS Board of DirectorsAbstractThis code supplements the requirements of AWS D1.1/D1.1M, Structural Welding CodeSteel. This code
3、 is intendedto be applicable to welded joints in Seismic Force Resisting Systems designed in accordance with the AISC SeismicProvisions. Clauses 17 constitute a body of rules for the regulation of welding in Seismic Force Resisting Systems.There are seven mandatory annexes in this code. A commentary
4、 of the code is included with the document.iiAWS D1.8/D1.8M:2009International Standard Book Number: 978-0-87171-754-2American Welding Society550 N.W. LeJeune Road, Miami, FL 33126 2009 by American Welding SocietyAll rights reservedPrinted in the United States of AmericaPhotocopy Rights. No portion o
5、f this standard may be reproduced, stored in a retrieval system, or transmitted in anyform, including mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyrightowner.Authorization to photocopy items for internal, personal, or educational classroom use on
6、ly or the internal, personal, oreducational classroom use only of specific clients is granted by the American Welding Society provided that the appropriatefee is paid to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, tel: (978) 750-8400; Internet:.iiiAWS D1.8/D1.8M:2009Statem
7、ent on the Use of American Welding Society StandardsAll standards (codes, specifications, recommended practices, methods, classifications, and guides) of the AmericanWelding Society (AWS) are voluntary consensus standards that have been developed in accordance with the rules of theAmerican National
8、Standards Institute (ANSI). When AWS American National Standards are either incorporated in, ormade part of, documents that are included in federal or state laws and regulations, or the regulations of other govern-mental bodies, their provisions carry the full legal authority of the statute. In such
9、 cases, any changes in those AWSstandards must be approved by the governmental body having statutory jurisdiction before they can become a part ofthose laws and regulations. In all cases, these standards carry the full legal authority of the contract or other documentthat invokes the AWS standards.
10、Where this contractual relationship exists, changes in or deviations from requirementsof an AWS standard must be by agreement between the contracting parties.AWS American National Standards are developed through a consensus standards development process that bringstogether volunteers representing va
11、ried viewpoints and interests to achieve consensus. While the AWS administers theprocess and establishes rules to promote fairness in the development of consensus, it does not independently test, evalu-ate, or verify the accuracy of any information or the soundness of any judgments contained in its
12、standards.AWS disclaims liability for any injury to persons or to property, or other damages of any nature whatsoever, whetherspecial, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, or relianceon this standard. AWS also makes no guarantee or
13、warranty as to the accuracy or completeness of any informationpublished herein.In issuing and making this standard available, AWS is neither undertaking to render professional or other services for oron behalf of any person or entity, nor is AWS undertaking to perform any duty owed by any person or
14、entity to someoneelse. Anyone using these documents should rely on his or her own independent judgment or, as appropriate, seek theadvice of a competent professional in determining the exercise of reasonable care in any given circumstances. It isassumed that the use of this standard and its provisio
15、ns are entrusted to appropriately qualified and competent personnel.This standard may be superseded by the issuance of new editions. Users should ensure that they have the latest edition.Publication of this standard does not authorize infringement of any patent or trade name. Users of this standard
16、acceptany and all liabilities for infringement of any patent or trade name items. AWS disclaims liability for the infringement ofany patent or product trade name resulting from the use of this standard.Finally, the AWS does not monitor, police, or enforce compliance with this standard, nor does it h
17、ave the power to do so.On occasion, text, tables, or figures are printed incorrectly, constituting errata. Such errata, when discovered, are postedon the AWS web page (www.aws.org).Official interpretations of any of the technical requirements of this standard may only be obtained by sending a reques
18、t, inwriting, to the appropriate technical committee. Such requests should be addressed to the American Welding Society,Attention: Managing Director, Technical Services Division, 550 N.W. LeJeune Road, Miami, FL 33126 (see Annex I).With regard to technical inquiries made concerning AWS standards, or
19、al opinions on AWS standards may be rendered.These opinions are offered solely as a convenience to users of this standard, and they do not constitute professionaladvice. Such opinions represent only the personal opinions of the particular individuals giving them. These individuals donot speak on beh
20、alf of AWS, nor do these oral opinions constitute official or unofficial opinions or interpretations ofAWS. In addition, oral opinions are informal and should not be used as a substitute for an official interpretation.This standard is subject to revision at any time by the AWS D1 Committee on Struct
21、ural Welding. It must be reviewedevery five years, and if not revised, it must be either reaffirmed or withdrawn. Comments (recommendations, additions,or deletions) and any pertinent data that may be of use in improving this standard are required and should be addressedto AWS Headquarters. Such comm
22、ents will receive careful consideration by the AWS D1 Committee on StructuralWelding and the author of the comments will be informed of the Committees response to the comments. Guests areinvited to attend all meetings of the AWS D1 Committee on Structural Welding to express their comments verbally.P
23、rocedures for appeal of an adverse decision concerning all such comments are provided in the Rules of Operation ofthe Technical Activities Committee. A copy of these Rules can be obtained from the American Welding Society, 550N.W. LeJeune Road, Miami, FL 33126.This page is intentionally blank.ivAWS
24、D1.8/D1.8M:2009vAWS D1.8/D1.8M:2009Personnel*DeceasedAWS D1 Committee on Structural WeldingD. D. Rager, Chair Rager Consulting, IncorporatedD. K. Miller, 1st Vice Chair The Lincoln Electric CompanyA. W. Sindel, 2nd Vice Chair Alstom Power, IncorporatedS. Morales, Secretary American Welding SocietyN.
25、 J. Altebrando STV, IncorporatedF. G. Armao The Lincoln Electric CompanyE. L. Bickford Acute Technological Services*F. C. Breismeister Strocal, IncorporatedB. M. Butler Walt Disney World CompanyH. H. Campbell III Loadmaster Universal RigsL. E. Collins Team Industries, IncorporatedR. B. Corbit Exelon
26、 Nuclear CorporationR. A. Dennis ConsultantM. A. Grieco Massachusetts Highway DepartmentC. W. Holmes Modjeski and Masters, IncorporatedJ. J. Kenney Shell International E subsequent annexes were renumbered.(26) Subclause D3.2.3Revised so that removal of steel backing is at the Contractors option.(27)
27、 Subclause D3.2.4Revised to include a maximum depth for backgouging.(28) Subclause D4.1Revised so visual inspection has tighter restrictions.(29) Subclause D4.2Added a provision for the removal of the backing to prevent interference with testing.(30) Figure D.1Clarified and added tolerances.(31) Sub
28、clause C-4.2New commentary added on tapered transitions.(32) Subclause C-6.3.5Clarified acceptability of CVN tests with higher energy levels or at lower temperatures thanthose specified.(33) Subclause C-6.12Content from previous edition was moved to subclause C-6.9. All subsequent commentarysubclaus
29、es were renumbered.(34) Subclause C-6.15.4.3Added reference to D1.1 for repairs requiring Engineers approval and repair requirements.(35) Figure C-6.3Note requiring Engineers approval for welding at k-area was removed.(36) Subclause C-A5.2New commentary explaining deletion of the two layer per pass
30、requirement.Background. Damage sustained by welded steel moment-frame buildings in the 1994 Northridge earthquake, and exten-sive research conducted by the FEMA/SAC program following that earthquake, demonstrated that in order to obtain ade-quate performance of welded steel structures under conditio
31、ns of severe earthquake-induced inelastic straining, additionalcontrols on design, detailing, materials, workmanship, testing, and inspection are necessary. This research resulted in sub-stantive changes to the AISC Seismic Provisions, which control the design of steel Seismic Force Resisting System
32、s(SFRS) designed to withstand severe inelastic straining as well as certain aspects of the materials and detailing of thesesystems. The provisions contained in this standard complement the AISC Seismic Provisions and are intended to ensurethat welded joints that are designed to undergo significant r
33、epetitive inelastic strains as a result of earthquakes, or that areused to connect members designed to resist such inelastic strains, have adequate strength, notch toughness, and integrityto perform as intended. This code, together with AWS D1.1/D1.1M, specifies the acceptable materials, procedures,
34、 andworkmanship for constructing welded joints in SFRS designed in accordance with the AISC Seismic Provisions as wellas the procedures and acceptance criteria for quality control and quality assurance inspection of welded joints in theSFRS. In some regions of the U.S., with low risk of intense eart
35、hquake shaking, building codes permit design of steelSeismic Force Resisting Systems that do not conform to the requirements of the AISC Seismic Provisions. The require-ments of this code apply only to the SFRS in structures designed in accordance with the AISC Seismic Provisions and neednot be appl
36、ied to structures not designed to those provisions.Commentary. The Commentary is nonmandatory and is intended only to provide insight, information, and provision rationale.Mandatory Annexes. These additions to the code are requirements that supplement the text.Errata. It is the Structural Welding Co
37、mmittees Policy that all errata should be made available to users of the code.Therefore, any significant errata will be published in the Society News Section of the AWS Welding Journal and postedon the AWS web site at: http:/www.aws.org/technical/d1/.Suggestions. Comments and suggestions for the imp
38、rovement of this standard are welcome. They should be sent to theSecretary, AWS D1 Committee on Structural Welding, American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126.ixAWS D1.8/D1.8M:2009Table of ContentsPage No.Personnel vForeword.viiList of TablesxiList of Figuresxi1. General Requir
39、ements 11.1 Applicability 11.2 Responsibilities11.3 Limitations.21.4 Welding Symbols.21.5 Safety Precautions .21.6 Standard Units of Measurement 22. Normative References .33. Terms and Definitions .53.1 Seismic Force Resisting System (SFRS).53.2 Demand Critical Welds53.3 Protected Zone.53.4 Quality
40、Assurance Plan (QAP)53.5 Lowest Anticipated Service Temperature (LAST) 53.6 k-Area 54. Welded Connection Details.74.1 Corner Clips of Continuity Plates and Stiffeners 74.2 Transitions in Thicknesses and Widths75. Welder Qualification .115.1 Supplemental Welder Qualification Testing 115.2 Welder Qual
41、ification Period 115.3 Welder Performance Qualification Record Information116. Fabrication.136.1 Welding Procedure Specifications (WPSs)136.2 Welding Processes .136.3 Filler and Weld Metal 136.4 FCAW Electrode Packaging, Storage, and Exposure 156.5 Maximum Interpass Temperature 156.6 Tack Welds to S
42、teel Backing in the Protected Zone156.7 Removal of Backing and Weld Root Treatment 166.8 Reinforcing Fillet Welds at Removed Weld Backing Locations .166.9 Fillet Welds at Left-in-Place Steel Backing.166.10 Weld Access Holes 166.11 Weld Tabs 176.12 End Dams.176.13 Welder Identification .176.14 Bottom
43、 Flange Welding Sequence.176.15 Protected Zone.176.16 Tack Welding Requirements18xPage No.AWS D1.8/D1.8M:20097. Inspection .237.1 Inspection Task Assignment 237.2 Inspector Qualifications.237.3 Quality Assurance Agency Written Practice .237.4 Wide-Flange k-Area Inspection.247.5 Lamellar Tearing247.6
44、 Beam Copes and Weld Access Holes 247.7 Repaired Weld Access Holes in the Protected Zone247.8 NDT of Repaired Tab Removal Sites 247.9 MT Requirements 247.10 Ultrasonic Testing24Annex A (Normative)WPS Heat Input Envelope Testing of Filler Metals for Demand Critical Welds 25Annex B (Normative)Intermix
45、 CVN Testing of Filler Metal Combinations (where one of the filler metalsAnnex B (Normative)is FCAW-S)29Annex D (Normative)Supplemental Welder Qualification for Restricted Access Welding.37Annex E (Normative)Supplemental Testing for Extended Exposure Limits for FCAW Filler Metals43Annex F (Normative
46、)Supplemental Ultrasonic Technician Testing.45Annex G (Normative)Supplemental Magnetic Particle Testing Procedures 47Annex H (Normative)Flaw Sizing by Ultrasonic Testing 49Annex I (Informative)Guidelines for the Preparation of Technical Inquiries for the StructuralAnnex I (Informative)Welding Commit
47、tee.51Annex J (Informative)Informative References .53Commentary .55Foreword.57Index .103List of AWS Documents on Structural Welding.111xiAWS D1.8/D1.8M:2009List of TablesTable Page No.6.1 Filler Metal Classification Properties.196.2 Mechanical Properties for Demand Critical Welds196.3 Diffusible Hyd
48、rogen Testing Requirements.19A.1 Heat Input Envelope TestingHeat Input, Preheat, and Interpass Temperatures .27A.2 All Weld Metal Mechanical Properties; Yield Strength, Tensile Strength, Elongation, andCVN Toughness Requirements 27B.1 Filler Metal Essential VariablesFCAW-S Substrate/Root 31B.2 Fille
49、r Metal Essential VariablesFCAW-S Fill 31CommentaryC-1.1 Removal of Tabs and Backing .63List of FiguresFigure Page No.4.1 Transition of Butt Joints in Parts of Unequal Thicknesses 84.2 Transition of Butt Joints in Parts of Unequal Widths 96.1 Reinforcing Fillet Requirements206.2 Alternate GeometryBeam Flange Weld Access Hole Detail .206.3 Acceptable Tab Removal Conditions.216.4 Acceptable and Unacceptable Use of End Dams.22A.1 Heat Input Envelope Test Plate 28B.1 Intermix Test Plate .32B.2 Interface Scribe Line Location.33B.3 Intermix CVN Test Specimen Loca
