1、AWWA Standard SM Tendon-Prestressed Concrete Water Tanks Effective date: July 1, 2017. First edition approved by AWWA Board of Directors June 17, 1996. This edition approved Jan. 14, 2017. Approved by American National Standards Institute Feb. 17, 2017. ANSI/AWWA D115-17 (Revision of ANSI/AWWA D115-
2、06) Copyright 2017 American Water Works Association. All Rights Reserved. ii AWWA Standard This document is an American Water Works Association (AWWA) standard. It is not a specification. AWWA standards describe minimum requirements and do not contain all of the engineering and administrative inform
3、ation normally contained in specifications. The AWWA standards usually contain options that must be evaluated by the user of the standard. Until each optional feature is specified by the user, the product or service is not fully defined. AWWA pub- lication of a standard does not constitute endorseme
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5、nded to represent a consensus of the water industry that the product described will provide satisfactory ser- vice. When AWWA revises or withdraws this standard, an official notice of action will be placed on the first page of the Official Notice section of Journal American Water Works Association.
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7、An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an American National Standard does not in any respect preclude anyone, whether that person has approved the standard or not, from manufacturing, marketing, purchasing,
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9、ir own responsibility in advertising and promotional materials or on tags or labels that the goods are produced in conformity with particular American National Standards. Caution n oti Ce : The American National Standards Institute (ANSI) approval date on the front cover of this standard indicates c
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11、s may receive current information on all standards by calling or writing the American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036; 212.642.4900; or emailing infoansi.org. hours of work by your fellow water professionals. Revenue from the sales of this AWWA mat
12、erial supports ongoing product development. Unauthorized distribution, either electronic or photocopied, is illegal and hinders AWWAs mission to support the water community. This AWWA content is the product of thousands of ISBN-13, print: 978-1-62576-147-7 eISBN-13, electronic: 978-1-61300-372-5 DOI
13、: http:/dx.doi.org/10.12999/AWWA.D115.17 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information or retrieval system, except in the form of brief excerpts or quotations
14、 for review purposes, without the written permission of the publisher. Copyright 2017 by American Water Works Association Printed in USA Copyright 2017 American Water Works Association. All Rights Reserved. iii Committee Personnel The AWWA Standards Committee on Concrete Water Tanks, Tendon-Type Pre
15、stressed, which reviewed and approved this standard, had the following personnel at the time of approval: Terrence P. Kenyon, Chair General Interest Members C. Badger, Bates Engineering Inc., Lakewood, Colo. (AWWA) R.T. Bates,* Bates Engineering Inc., Lakewood, Colo. (AWWA) S.R. Close, Close Associa
16、tes LLC, Lakewood, Colo. (AWWA) T.P. Kenyon, Merrick and Company Inc., Denver, Colo. (AWWA) R. Kianoush, Ryerson University, Toronto, Canada (AWWA) F.S. Kurtz, Standards Engineer Liaison, AWWA, Denver, Colo. (AWWA) D. Larson, Standards Council Liaison, St. Louis, Mo. (AWWA) W.H. Peffley, Crawford, M
17、urphy (B) Separated DomeWall Connection . 27 4 Transfer of Tangential Shear From Wall to Base 38 5 Net Effective Base-Pad Width After Shear Deformation 42 Table 1 Response Modification Factor, R, for Type of Tank Base . 36 Copyright 2017 American Water Works Association. All Rights Reserved. vii For
18、eword This foreword is for information only and is not part of ANSI * /AW WA D115. I. Introduction. I.A. Background. The New England Water Works Association (NEWWA) established a committee in 1958 to prepare a standard for the design and construction of circular prestressed-concrete water storage ta
19、nks. The committee submitted a suggested specification covering wire-wound prestressed-concrete tanks to NEWWA in October 1962 as a guide to those water utilities that wished to consider the use of these tanks. The American Concrete Institute (ACI ) Committee 344 concluded eight years of committee w
20、ork with a report titled “Design and Construction of Circular Prestressed Concrete Structures,” published in the ACI Journal in September 1970. This report referred to both wire-wound and tendon tanks. After publication of its first report in 1970, ACI Committee 344 could not reach a consensus on a
21、combined report covering both wire-wound and tendon tanks. In 1985 the ACI Committee was divided into two subcommittees and “interim” reports were completed in 1988 for both types of tanks. ACI did not publish these interim reports but made copies available until a consensus could be reached on a re
22、combined report. However, a consensus could not be reached, and in the spring of 1994 ACI Committee 344 was divided into two separate commit- tees, ACI 372 and ACI 373. ACI Committee 373 was disbanded in 2012. I.B. History. In the December 1972 issue of Journal AWWA, circular prestressed-concrete wa
23、ter containment structures were discussed in four articles. As a result of these articles and continued discussion on the subject, a standards committee was authorized by the AWWA Standards Council on June 20, 1974, to develop an AWWA standard on circular prestressed-concrete water tanks. The AWWA S
24、tandards Committee on Circular Prestressed-Concrete Water Tanks held its first meeting June 19, 1974. After many meetings and the presentation of many differing viewpoints, this com- mittee decided to defer work on a standard for tendon tanks and to concentrate only on a standard for wire-wound tank
25、s. ANSI/AWWA D110-86, Standard for Wire-Wound Prestressed Concrete Tanks, was published in 1986. * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. American Concrete Institute, 38800 Country Club Drive, Farmington Hills, MI 48331. Copyright 2017 American
26、Water Works Association. All Rights Reserved. viii In 1988 the AWWA Standards Council authorized the formation of a new stan- dards committee to develop a standard for tendon-type prestressed-concrete tanks, with the assigned task of developing a standard for the safe, efficient use of tendon-stress
27、ing techniques for design and construction of tanks. Subsequently this new AWWA stan- dards committee was formed and held its first meeting on June 21, 1989, under its first chair, Ib Falk Jorgensen. The first edition of this standard was published in 1996 and incorporated appli - cable work of ACI
28、and the AWWA standards committee that had developed ANSI/ AWWA D110-86. It contained requirements and recommendations, specifically for potable water containment structures prestressed with bonded circumferential tendons. The second edition was expanded to include tendon-prestressed tanks of rectan-
29、 gular and other shapes, as well as circular. It was approved by the AWWA Board of Directors on Feb. 12, 2006. This third edition of ANSI/AWWA D115 was approved on Jan. 14, 2017. I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a
30、consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct and indirect drinking water additives. Other members of the consortium included the Water Research Foundation (formerly AwwaRF) and the Conference of State Health and
31、 Environmental Managers (COSHEM). The American Water Works Association (AWWA) and the Association of State Drinking Water Administrators (ASDWA) joined later. In the United States, authority to regulate products for use in, or in contact with, drinking water rests with individual states.* Local agen
32、cies may choose to impose requirements more stringent than those required by the state. To evaluate the health effects of products and drinking water additives from such products, state and local agencies may use various references, including 1. Specific policies of the state or local agency. 2. Two
33、 standards developed under the direction of NSF : NSF/ANSI 60, Drinking Water Treatment ChemicalsHealth Effects, and NSF/ANSI 61, Drinking Water System ComponentsHealth Effects. * Persons outside the United States should contact the appropriate authority having jurisdiction. NSF International, 789 N
34、orth Dixboro Road, Ann Arbor, MI 48105. Copyright 2017 American Water Works Association. All Rights Reserved. ix 3. Other references, including AWWA standards, Food Chemicals Codex, Water Chemicals Codex,* and other standards considered appropriate by the state or local agency. Various certification
35、 organizations may be involved in certifying products in accor- dance with NSF/ANSI 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdictions. Accreditation of certi- fication organizations may vary from jurisdiction to jurisd
36、iction. Annex A, “Toxicology Review and Evaluation Procedures,” to NSF/ANSI 61 does not stipulate a maximum allowable level (MAL) of a contaminant for substances not regulated by a USEPA final maximum contaminant level (MCL). The MALs of an unspecified list of “unregulated contaminants” are based on
37、 toxicity testing guidelines (noncarcinogens) and risk characterization methodology (carcinogens). Use of Annex A procedures may not always be identical, depending on the certifier. ANSI/AWWA D115 does not address all material requirements. Users of this stan- dard should consult the appropriate sta
38、te or local agency having jurisdiction in order to 1. Determine materials requirements, including applicable standards. 2. Determine the status of certifications by parties offering to certify products for contact with, or treatment of, drinking water. 3. Determine current information on product cer
39、tification. II. Special Issues. II.A. General. Thi s standard reflects a committee consensus of industry practice concerning the design, detailing, and construction of prestressed-concrete water tanks that employ horizontal prestressing tendons in walls. This standard also addresses the use of prest
40、ressing tendons in floors, vertically in the walls, and in roofs. Recommended criteria and guidelines are presented to assist engineers in design and construction of both cast-in-place and precast concrete tanks using tendon prestressing, based on the specific detailed experience of the committee me
41、mbers. Engineering principles are tied to existing codes where applicable. Design and construction of prestressed-concrete water tanks are complex, requiring a wide range of special knowledge and experience. This standard represents a sharing of information on the unique aspects of analysis and cons
42、truction that are encountered in these types of structures. II.B. Site-Specific Conditions. Because of the wide range of site-specific environments, foundation conditions, loadings, and construction conditions * Both publications available from National Academy of Sciences, 500 Fifth Street, NW, Washington, DC 20001. Copyright 2017 American Water Works Association. All Rights Reserved.
