1、DD CEN/TS1992-4-2:2009ICS 21.060.10; 91.080.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWDRAFT FOR DEVELOPMENTDesign of fasteningsfor use in concretePart 4-2: Headed FastenersThis Draft for Developmentwas published under theauthority of the StandardsPolicy and StrategyComm
2、ittee on 30 June2009. BSI 2009ISBN 978 0 580 62636 4Amendments/corrigenda issued since publicationDate CommentsDD CEN/TS 1992-4-2:2009National forewordThis Draft for Development is the UK implementation of CEN/TS1992-4-2:2009.This publication is not to be regarded as a British Standard.It is being i
3、ssued in the Draft for Development series of publications andis of a provisional nature. It should be applied on this provisional basis,so that information and experience of its practical application can beobtained.Comments arising from the use of this Draft for Development arerequested so that UK e
4、xperience can be reported to the internationalorganization responsible for its conversion to an international standard.A review of this publication will be initiated not later than 3 years afterits publication by the international organization so that a decision can betaken on its status. Notificati
5、on of the start of the review period will bemade in an announcement in the appropriate issue of Update Standards.According to the replies received by the end of the review period,the responsible BSI Committee will decide whether to support theconversion into an international Standard, to extend the
6、life of theTechnical Specification or to withdraw it. Comments should be sent tothe Secretary of the responsible BSI Technical Committee at BritishStandards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted to TechnicalCommittee B/525/2, Structural us
7、e of concrete.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer im
8、munityfrom legal obligations.DD CEN/TS 1992-4-2:2009TECHNICAL SPECIFICATIONSPCIFICATION TECHNIQUETECHNISCHE SPEZIFIKATIONCEN/TS 1992-4-2May 2009ICS 21.060.10; 91.080.40English VersionDesign of fastenings for use in concrete - Part 4-2: HeadedFastenersConception-calcul des lments de fixation pour bto
9、n -Partie 4-2 : Elments de fixation tteBemessung von Befestigungen in Beton - Teil 4-2:KopfbolzenThis Technical Specification (CEN/TS) was approved by CEN on 20 October 2008 for provisional application.The period of validity of this CEN/TS is limited initially to three years. After two years the mem
10、bers of CEN will be requested to submit theircomments, particularly on the question whether the CEN/TS can be converted into a European Standard.CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS availablepromptly at national level i
11、n an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)until the final decision about the possible conversion of the CEN/TS into an EN is reached.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Re
12、public, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE N
13、ORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. CEN/TS 1992-4-2:2009: EDD CEN/TS 1992-4-2:2009CEN/TS 1992-4-2:2009 (E) 2 Contents Page F
14、oreword 31 Scope 41.1 General 42 Normative references 43 Definitions and symbols .44 Basis of design 45 Determination of action effects 55.3 Tension forces in a supplementary reinforcement 55.3.1 General 55.3.2 Fasteners loaded in tension .55.3.3 Fixtures loaded in shear .56 Verification of ultimate
15、 limit state by elastic analysis .66.1 General 66.2 Tension load .66.2.1 Required verifications .66.2.2 Detailing of supplementary reinforcement .76.2.3 Steel failure of fastener .86.2.4 Pull-out failure of fastener 86.2.5 Concrete cone failure 86.2.6 Splitting failure 146.2.7 Blow-out failure . 156
16、.2.8 Steel failure of the supplementary reinforcement . 186.2.9 Anchorage failure of the supplementary reinforcement in the concrete cone 186.3 Shear load 196.3.1 Required verifications 196.3.2 Detailing of supplementary reinforcement 196.3.3 Steel failure of fastener 206.3.4 Concrete pry-out failur
17、e . 226.3.5 Concrete edge failure . 236.4 Combined tension and shear load 306.4.1 Fastenings without supplementary reinforcement . 307 Fatigue . 318 Seismic 31DD CEN/TS 1992-4-2:2009CEN/TS 1992-4-2:2009 (E) 3 Foreword This Technical Specification (CEN/TS 1992-4-2:2009) has been prepared by Technical
18、 Committee CEN/TC 250 “Structural Eurocodes”, the secretariat of which is held by BSI. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights.
19、 The Technical Specification CEN/TS 1992-42 Headed fasteners, describes the principles and requirements for safety, serviceability and durability of headed fasteners for use in concrete. It is based on the limit state concept used in conjunction with a partial factor method. This Technical Specifica
20、tion does not provide information about the use of National Determined Parameters (NDP). CEN/TS 1992-4 Design of fastenings for use in concrete is subdivided into the following parts: Part 1: General Part 2: Headed fasteners Part 3: Anchor channels Part 4: Post-installed fasteners Mechanical systems
21、 Part 5: Post-installed fasteners Chemical systems Relation to Part 1 of this Technical Specification TS The principles and requirements of Part 2 of this CEN/TS are additional to those in Part 1, all the clauses and subclauses of which also apply to Part 2 unless varied in this Part. Additional inf
22、ormation is presented under the relevant clauses/subclauses of Part 1 of the CEN/TS. The numbers for the clauses/sub-clauses of Part 2 continue from the number of the last relevant clauses/sub-clauses of Part 1. The above principles also apply to Figures and Tables in Part 2. According to the CEN/CE
23、NELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
24、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DD CEN/TS 1992-4-2:2009CEN/TS 1992-4-2:2009 (E) 4 1 Scope 1.1 General 1.1.6 This document relies on characteristic resistances and distances which are stated in
25、a European Technical Specification. In minimum the following characteristics should be given in a European Technical Specification as base for the design methods of this CEN/TS: NRk,p, NRk,s, VRk,s 0sRk,M ccr,N, scr,N ccr,sp, scr,sp cmin, smin, hmin limitations on concrete strength classes of base m
26、aterial kcr, kucr, k2, k4, k6, k7 dh, dnom, hef, lf Mipartial factors for material see also CEN/TS 1992-4-1:2009, clause 4. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the approp
27、riate 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 or revision. For undated references the latest edition of the publica
28、tion referred to applies. NOTE The following references to Eurocodes are references to European Standards and European Prestandards. These are the only European documents available at the time of publication of this TS. National documents take precedence until Eurocodes are published as European Sta
29、ndards. EN 1992-1-1, Eurocode 2: Design of concrete structures Part 1-1: General rules and rules for buildings CEN/TS 1992-4-1:2009, Design of fastenings for use in concrete Part 4-1: General EN 10080, Steel for the reinforcement of concrete Weldable reinforcing steel General EN ISO 13918, Welding S
30、tuds and ceramic ferrules for arc stud welding (ISO 13918:2008) 3 Definitions and symbols Definitions and symbols are given in CEN/TS 1992-4-1. 4 Basis of design 4.5.4 Design of welding should be in accordance with EN 1993-1. DD CEN/TS 1992-4-2:2009CEN/TS 1992-4-2:2009 (E) 5 4.5.5 The following assu
31、mptions in respect to installation have been made in this CEN/TS. The installation instructions should reflect them: 1) The fastener should be fixed to the formwork or auxiliary constructions in a way that no movement of the fastener will occur during placing of reinforcement or during pouring and c
32、ompacting of the concrete. 2) Requirements for adequate compaction particularly under the head of the stud or fastener and under the fixture, provisions for vent openings in fixtures larger than 400 mm 400 mm. 3) Requirement for inspection and approval of the correct installation of the fasteners by
33、 qualified personnel. 4) The following conditions should be observed if the fasteners are vibrated (not just punched) into the wet concrete immediately after pouring: The size of the fixture does not exceed 200 mm 200 mm and the number of fastenings is limited to 4 fasteners, so that it can be place
34、d simultaneously during vibrating by the available personnel. The installation is done according to a quality system. The fastenings should not be moved after vibrating has been finished. The concrete under the head of the headed stud or anchor as well as under the base plate should be properly comp
35、acted. 5) The welding procedure for studs should be done in accordance with the provisions given in the relevant European Technical Specification. 6) Inspection and approval of the correct installation of the fasteners is carried out by appropriately qualified personnel. 5 Determination of action ef
36、fects 5.3 Tension forces in a supplementary reinforcement 5.3.1 General Where supplementary reinforcement is provided, the design tension forces in the supplementary reinforcement should be established using an appropriate strut and tie model. The supplementary reinforcement should be designed to re
37、sist the total external load on the fastening. 5.3.2 Fasteners loaded in tension The design tension forces NEd, rein the supplementary reinforcement should be calculated using the design load on the fastener. 5.3.3 Fixtures loaded in shear The design tension force NEd, rein the supplementary reinfor
38、cement caused by the design shear force VEdacting on a fixture is given by Equation (1). edsreEd,1 VzeN += (1) DD CEN/TS 1992-4-2:2009CEN/TS 1992-4-2:2009 (E) 6 with (see Figure 1): es= distance between reinforcement and shear force acting on a fixture z = internal lever arm of the concrete member 0
39、,85d 1ef22minchd If the supplementary reinforcement is not arranged in the direction of the shear force (see Figure 10c) then this must be taken into account in the calculation of the design tension force of the reinforcement. In the case of different shear forces on the fasteners of a fixture, Equa
40、tion (1) should be solved for the shear load hEdV of the most loaded fastener resulting in hreEd,N . Figure 1 Detailing of reinforcement to take up shear forces 6 Verification of ultimate limit state by elastic analysis 6.1 General 6.1.5 This section applies when forces on the fasteners have been ca
41、lculated using elastic analysis. Annex B of Part 1 should be used for plastic analysis. 6.1.6 The spacing between outer headed fasteners of adjoining groups or the distance to single fasteners shall be a scr,N. 6.2 Tension load 6.2.1 Required verifications The required verifications are given in Tab
42、le 1. 6.2.1.1 For fasteners without supplementary reinforcement the verifications of Table 1, lines 1 to 5 apply. 6.2.1.2 For fasteners with supplementary reinforcement the verifications of Table 1, lines 1, 2 and 4 to 7 apply. DD CEN/TS 1992-4-2:2009CEN/TS 1992-4-2:2009 (E) 7 6.2.2 Detailing of sup
43、plementary reinforcement When the design relies on supplementary reinforcement, concrete cone failure according to Equation (4) needs not to be verified but the supplementary reinforcement should be designed to resist the total load. The supplementary reinforcement to take up tension loads should co
44、mply with the following requirements (see also Figure 2): a) In general, the same diameter of the reinforcement should be provided for all fasteners of a group. The reinforcement should consist of ribbed reinforcing bars (fyk 500 N/mm2) with a diameter dsnot larger than 16 mm and should be detailed
45、in form of stirrups or loops with a mandrel diameter according to EN 1992-1-1. Table 1 Required verifications for headed fasteners loaded in tension Single fastener Fastener groupmost loaded fastener fastener group 1 Steel failure of fastener MssRk,sRd,EdNNN = MssRk,sRd,hEdNNN = 2 Pull-out failure o
46、f fastener MppRk,pRd,EdNNN = MppRk,pRd,hEdNNN = 3 Concrete cone failure MccRk,cRd,EdNNN = MccRk,cRd,gEdNNN = 4 Splitting failure MspspRk,spRd,EdNNN = MspspRk,spRd,gEdNNN = 5 Blow-out failureaMccbRk,cbRd,EdNNN = MscbRk,cbRd,gEdNNN = 6 Steel failure of reinforcement reMs,reRk,reRd,reEd,NNN =reMs,reRk,
47、reRd,hreEd,NNN = 7 Anchorage failure of reinforcement aRd,reEd,NN aRd,hreEd,NN a Not required for fasteners with c 0,5 hefFigure 2 Example for a multiple fastening with supplementary reinforcement to take up tension loads and corresponding strut and tie model DD CEN/TS 1992-4-2:2009CEN/TS 1992-4-2:2
48、009 (E) 8 b) The supplementary reinforcement should be placed as close to the fasteners as practicable to minimize the effect of eccentricity associated with the angle of the failure cone. Preferably, the supplementary reinforcement should enclose the surface reinforcement. Only these reinforcement
49、bars with a distance 0,75 hef, from the fastener should be assumed as effective. c) The minimum anchorage length of supplementary reinforcement in the concrete failure cone is sdl 4min1= (anchorage with bends, hooks or loops) or sdl 10min1= (anchorage with straight bars with or without welded transverse bars). d) The supplementary reinfo
