ACI 544 8R-2016 Report on Indirect Method to Obtain Stress-Strain Response of Fiber-Reinforced Concrete (FRC).pdf
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1、Report on Indirect Method to Obtain Stress-Strain Response of Fiber-Reinforced Concrete (FRC)Reported by ACI Committee 544ACI 544.8R-16First PrintingMarch 2016ISBN: 978-1-942727-72-9Report on Indirect Method to Obtain Stress-Strain Response of Fiber-Reinforced Concrete (FRC)Copyright by the American
2、 Concrete Institute, Farmington Hills, MI. All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of ACI.The technical committees responsible for ACI comm
3、ittee reports and standards strive to avoid ambiguities, omissions, and errors in these documents. In spite of these efforts, the users of ACI documents occasionally find information or requirements that may be subject to more than one interpretation or may be incomplete or incorrect. Users who have
4、 suggestions for the improvement of ACI documents are requested to contact ACI via the errata website at http:/concrete.org/Publications/DocumentErrata.aspx. Proper use of this document includes periodically checking for errata for the most up-to-date revisions.ACI committee documents are intended f
5、or the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept responsibility for the application of the material it contains. Individuals who use this publication in any way assume all risk and accept total responsibil
6、ity for the application and use of this information.All information in this publication is provided “as is” without warranty of any kind, either express or implied, including but not limited to, the implied warranties of merchantability, fitness for a particular purpose or non-infringement.ACI and i
7、ts members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, including without limitation, lost revenues or lost profits, which may result from the use of this publication.It is the responsibility of the user of this document to establ
8、ish health and safety practices appropriate to the specific circumstances involved with its use. ACI does not make any representations with regard to health and safety issues and the use of this document. The user must determine the applicability of all regulatory limitations before applying the doc
9、ument and must comply with all applicable laws and regulations, including but not limited to, United States Occupational Safety and Health Administration (OSHA) health and safety standards.Participation by governmental representatives in the work of the American Concrete Institute and in the develop
10、ment of Institute standards does not constitute governmental endorsement of ACI or the standards that it develops.Order information: ACI documents are available in print, by download, on CD-ROM, through electronic subscription, or reprint and may be obtained by contacting ACI.Most ACI standards and
11、committee reports are gathered together in the annually revised ACI Manual of Concrete Practice (MCP).American Concrete Institute38800 Country Club DriveFarmington Hills, MI 48331Phone: +1.248.848.3700Fax: +1.248.848.3701www.concrete.orgDevelopment of proper design procedures for fiber-reinforced co
12、ncrete (FRC) materials requires use of material tensile and compressive stress strains that reflect the contribution of fibers to the post-cracking behavior. While uniaxial tension tests provide the most fundamental material properties, conducting closed-loop tension tests are difficult to accomplis
13、h; therefore, methods based on indirect measurement of tensile properties using flexural tests are typically used.This report presents the methodologies that are used for data reduction and presentation of the flexural test results in terms of an equivalent tensile stress-strain response for FRC mat
14、erials. Existing methods for estimating uniaxial tensile stress-strain response of strain-softening and hardening FRCs from flexural beam-test data are introduced. Different approaches applied to beam tests based on elastic equivalent, curve fitting, or back-calcu-lation of flexural data are introdu
15、ced. These are divided into two general categories: elastic equivalent approach or inverse analysis method. In the elastic equivalent approach, a summary of available test methods by various code agencies are presented.Using back-calculation methods, tools based on the finite element method and anal
16、ytical closed-form solutions are presented. An approach is presented that uses closed-form moment-curvature relationships and obtains load-deflection responses for a beam of three- or four-point loading. The method is used to obtain equiva-lent parametric tensile stress and strain relationships for
17、a variety of FRC materials. The methods are compared against the available residual strength and also elastically equivalent residual strengths obtained by different specimen geometries.Results for a range of FRC materials studied show the back-calculated post-peak residual tensile strength is appro
18、ximately 30 to 37 percent of the elastically equivalent flexural residual strength for specimens with different fiber types and volume fractions.Keywords: fiber-reinforced concrete; inverse analysis; tensile stress-strain diagram.Barzin Mobasher*, ChairNeven Krstulovic-Opara*, SecretaryClifford N. M
19、acDonald, Membership SecretaryACI 544.8R-16Report on Indirect Method to Obtain Stress-Strain Response of Fiber-Reinforced Concrete (FRC)Reported by ACI Committee 544Corina-Maria AldeaEmmanuel K. AttiogbeNemkumar BanthiaJoaquim Oliveira Barros*Gordon B. BatsonPeter H. BischoffJean-Philippe CharronXav
20、ier DestreeAshish DubeyMahmut EkenelLiberato FerraraGregor D. FischerDean P. ForgeronAntonio GallovichRishi GuptaGeorge C. HoffJohn JonesDavid A. LangeMaria Lopez de MurphyMichael A. MahoneyBruno MassicotteChristian MeyerJames MilliganNicholas C. Mitchell Jr.Gerald H. MortonAntoine E. Naaman*Jeffrey
21、 L. NovakGiovanni A. PlizzariMax L. PorterVenkataswamy RamakrishnanKlaus Alexander RiederPierre RossiSurendra P. ShahFlavio de Andrade SilvaKay WilleRobert C. ZellersLihe ZhangConsulting MembersP.N. BalaguruHiram Price Ball Jr.Arnon BenturAndrzej M. BrandtJames I. DanielSidney FreedmanMelvyn A. Gali
22、natHenry J. MalloyAntoine E. Naaman*Members of the subcommittee that authored this report.Chair of the task group that drafted this report.Deceased.ACI Committee Reports, Guides, and Commentaries are intended for guidance in planning, designing, executing, and inspecting construction. This document
23、is intended for the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept responsibility for the application of the material it contains. The American Concrete Institute disclaims any and all responsibility for the st
24、ated principles. The Institute shall not be liable for any loss or damage arising therefrom.Reference to this document shall not be made in contract documents. If items found in this document are desired by the Architect/Engineer to be a part of the contract documents, they shall be restated in mand
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