BS EN 524-4-1997 Steel strip sheaths for prestressing tendons - Test methods - Determination of lateral load resistance《预应力钢丝索用钢带护套 试验方法 抗侧面负荷力的测定》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 524-4 : 1997 The Eu

2、ropean Standard EN 524-4 : 1997 has the status of a British Standard ICS 77.140.75; 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Steel strip sheaths for prestressing tendons Test methods Part 4. Determination of lateral load resistanceThis British Standard, having

3、 been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 November 1997 BSI 1997 ISBN 0 580 28672 X BS EN 524-4 : 1997 Amendments issued since publication Amd. No. Date Text affected

4、 National foreword This British Standard is the English language version of EN 524-4 : 1997. The UK participation in its preparation was entrusted by Technical Committee B/525, Building and civil engineering structures, to Subcommittee B/525/2, Structural use of concrete, which has the responsibilit

5、y to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations r

6、epresented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspo

7、ndence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, an EN title page, pages 2 to 4, an insid

8、e back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 Copyright reserved to CEN members. Ref. No. EN 524-4 : 1997 E EUROPEAN STANDARD EN 524-4 NORME E

9、UROPE ENNE EUROPA ISCHE NORM March 1997 ICS 77.140.75; 91.080.40 Descriptors: Prestressed concretes, tubes, sheathing, prestressing steels, classifications, specification, verification, marking English version Steel strip sheaths for prestressing tendons Test methods Part 4: Determination of lateral

10、 load resistance Gaines en feuillard dacier pour ca bles de pre contrainte Me thodes dessai Partie 4: De termination de la re sistance aux charges late rales Hu llrohre aus Bandstahl fu r Spannglieder Pru fverfahren Teil 4: Bestimmung der Querbelastbarkeit This European Standard was approved by CEN

11、on 1997-01-27. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may b

12、e obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Centra

13、l Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 524-4

14、: 1997 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 104, Concrete (performance, production, placing and compliance criteria), the Secretariat of which is held by DIN. This standard is a part of the series EN 524 Sheaths for prestressing tendons Test method

15、s which additionally comprises the following Parts Part 1 Determination of shape and dimensions Part 2 Determination of flexural behaviour Part 3 To-and-fro bending test Part 5 Determination of tensile load resistance Part 6 Determination of leaktightness (Determination of water loss) These European

16、 Standards apply to EN 523 Steel strip sheaths for prestressing tendons Terminology, requirements, quality control. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 1997, and conflicting

17、national standards shall be withdrawn at the latest by September 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Icelan

18、d, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Apparatus and accuracy 3 4 Procedure 3Page 3 EN 524-4 : 1997 BSI 1997 Figure 1. Test set-up for checking the lateral load res

19、istance; example with stiffener 1 Scope This European Standard specifies the procedure for determining the lateral load resistance of sheaths for prestressing tendons which comply with EN 523. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from o

20、ther publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment

21、or revision. For undated references the latest edition of the publication referred to applies. EN 523 : 1997 Steel strip sheaths for prestressing tendons Terminology, requirements, quality control 3 Apparatus and accuracy The following test equipment is required: a testing machine or a suitable test

22、 frame with a hydraulic or mechanical drive; a load measuring device with an accuracy of 2 % of the lateral load specified in table 1 in EN 523 : 1997; a deformation measuring instrument e.g. vernier calliper or micrometer gauge with an accuracy of 0,1 mm. 4 Procedure A 1100 mm long specimen is plac

23、ed on a firm, 500 mm long base as shown in figure 1 and subjected to loading by means of a plunger provided with a cylindrical end with a diameter of 12 mm. Each test specimen has to be loaded twice in two different places, one on the seam and the other outside the seam. The places of loading on and

24、 outside the seam shall be situated in the middle part of the specimen and shall have a distance of 150 mm minimum from one another. The time of load application shall lie between 30 s and 1 min. After unloading, the smallest irreversible internal diameter of the sheath shall be determined at each l

25、oading point. NOTE. This test may also be conducted using a stiffener if necessary. Where stiffeners are used (see figure 1) the size shall not exceed half the circumference of the specimen and shall have the same profile as the specimen. The length of the stiffener shall not exceed 1,5 times the no

26、minal internal diameter of the sheath or 100 mm whichever is the greater.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

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