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1、 - W - - - - - - - - - 77- 7 - -8- - - - $ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - W W D - w - - - - CEN/TS 1992-4-5:2009 (E) 2 Contents Page Foreword 3 1Scope 4 1.1General 4 2Normative references 4 3Definitions and symbols .4 4Basis of design 5 4.1General 5 5Determination
2、of action effects 5 6Verification of ultimate limit state by elastic analysis .5 6.1General 5 6.2Tension load .6 6.2.1Required verifications .6 6.2.2Steel failure .6 6.2.3Concrete cone failure 8 6.2.4Splitting failure 14 6.3Shear load 15 6.3.1Required verifications 15 6.3.2Steel failure 15 6.3.3Conc
3、rete pry-out failure . 16 6.3.4Concrete edge failure . 17 6.4Combined tension and shear load 23 6.4.1Steel failure decisive for tension and shear load 23 6.4.2Other modes of failure decisive 24 7Fatigue . 24 8Seismic 24 CEN/TS 1992-4-5:2009 (E) 3 Foreword This Technical Specification (CEN/TS 1992-4-
4、5:2009) has been prepared by Technical 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 iden
5、tifying any or all such patent rights. This Technical Specification CEN/TS 1992-4-5 Post-installed fasteners Chemical systems, describes the principles and requirements for safety, serviceability and durability of post-installed fasteners with chemical anchorage systems for use in concrete. This Tec
6、hnical Specification does not provide information about the use of National Determined Parameters (NDP). CEN/TS 1992-4-5 is based on the limit state concept used in conjunction with a partial factor method. CEN/TS 1992-4 Design of fastenings for use in concrete is subdivided into the following parts
7、: Part 1: General Part 2: Headed fasteners Part 3: Anchor channels Part 4: Post-installed fasteners Mechanical systems Part 5: Post-installed fasteners Chemical systems Connection to Part 1 of this Technical Specification TS The principles and requirements of Part 5 of this CEN/TS are additional to
8、those in Part 1, all the clauses and subclauses of which also apply to Part 5 unless varied in this Part. Additional information is presented under the relevant clauses/sub-clauses of Part 1 of the CEN/TS. The numbers for the clauses/sub-clauses of Part 5 continue from the number of the last relevan
9、t clauses/sub-clauses of Part 1. The above principles also apply to Figures and Tables in Part 5. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Cyprus,
10、 Czech Republic, 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 the United Kingdom. CEN/TS 1992-4-5:2009 (E) 4 1 Scope 1.1 G
11、eneral 1.1.6 This document relies on characteristic resistances and distances which are stated in a European Technical Specification. In general the design concept is valid in the product dimensions 6 hef/dnom 20. The actual range for a particular fastener may be taken from the relevant European Tec
12、hnical Specification. In minimum the following characteristics should be given in the relevant European Technical Specification as base for the design method of this CEN/TS. NRk,s, VRk,s 0 sRk, M Rk ccr,N, scr,N ccr,sp, scr,sp cmin, smin hmin limitations on concrete strength classes of base material
13、 kcr, kucr, k , k2, k3, k4, k8 dnom, hef, lf , limitations on hef/dnom Mi, recommended partial factors see 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
14、 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 or revision. For undated references the latest edition
15、of the publication 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 a
16、s European Standards. 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 3 Definitions and symbols Definitions and symbols are given in CEN/TS 1992-4-1. CEN/TS 1992-4-5
17、:2009 (E) 5 4 Basis of design 4.1 General 4.5.4 The following assumptions in respect to installation have been made in this CEN/TS. The installation instructions should reflect them: 1) Concrete has been compacted adequately in the area of the fastening. This should be checked prior and during insta
18、llation via visual check. 2) Requirements for drilling operation and bore hole: Holes are drilled perpendicular to the surface of the concrete unless specifically required otherwise by the manufacturers instructions. Drilling is carried out by method specified by the manufacturer. When hard metal ha
19、mmer-drill bits are used, they should comply with ISO or National Standards. When diamond core drilling is permitted, the diameter of the segments should comply with the prescribed diameter. Reinforcement in close proximity to the hole position is not damaged during drilling. In prestressed concrete
20、 structures it is ensured that the distance between the drilling hole and the prestressed reinforcement is at least 50mm; for determination of the position of the prestressed reinforcement in the structure a suitable device e.g. a reinforcement detector is used. Holes are cleaned according to the in
21、structions given in the European Technical Specification. Aborted drill holes are filled with high strength non-shrinkage mortar. 3) Inspection and approval of the correct installation of the fasteners is carried out by appropriately qualified personnel. NOTE Many drill bits exhibit a mark indicatin
22、g that they are in accordance with ISO or National Standards. If the drill bits do not bear a conformity mark, evidence of suitability should be provided. 5 Determination of action effects The determination and analysis of the condition of the concrete cracked or non-cracked - serving as base materi
23、al for the fastener and of the loads acting on the fastener is given in CEN/TS 1992-4-1:2009, clause 5. 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 calculated using elastic analysis. CEN/TS 1992-4-1:2009, An
24、nex B should be used for plastic analysis. 6.1.6 The spacing between outer post-installed fasteners of adjoining groups or the distance to single fasteners shall be a scr,N . 6.1.7 Aborted drill holes filled with high strength non-shrinkage mortar do not have to be considered in the design of the fa
25、stenings. CEN/TS 1992-4-5:2009 (E) 6 6.2 Tension load 6.2.1 Required verifications The required verifications are given in Table 1. Table 1 Verification for post-installed fasteners loaded in tension Single fastener Fastener group1) most loaded fastener fastener group 1 Steel failure NEd NRd,s = NRk
26、,s / Ms h Ed N NRd,s = NRk,s / Ms,s 2 Combined pull-out and concrete failure NEd NRd,p = NRk,p / Mp g Ed N NRd,p = NRk,p / Mp 3 Concrete cone failure NEd NRd,c = NRk,c / Mc g Ed N NRd,c = NRk,c / Mc 4 Splitting failure NEd NRd,sp = NRk,sp / Msp g Ed N NRd,sp = NRk,sp / Msp 1) Verification is perform
27、ed only for the fasteners of a group loaded in tension. 6.2.2 Steel failure The characteristic resistance of a fastener in case of steel failure NRk,s is given in the relevant European Technical Specification. The strength calculations are based on uk f. Combined pull-out and concrete failure The ch
28、aracteristic resistance of a fastener, a group of fasteners and the tensioned fasteners of a group of fasteners in case of combined pull-out and concrete failure may be obtained by Equation (1). ec,Npre,Ng,Nps,Np 0 p,N p,N 0 pRk, pRk, A A NN N (1) The different factors of Equation (1) are given belo
29、w. NOTE This verification is necessary only in the case that maxRk,Rk . Rk, see Equation (2), and maxRk, , see Equation (8) 6.2.2.1 Basic resistance of a single fastener The characteristic resistance of a single bonded fastener 0 pRk, N not influenced by adjacent bonded fasteners or edges of the con
30、crete member is: efRk 0 pRk, hdN (2) with CEN/TS 1992-4-5:2009 (E) 7 RkN/mm characteristic bond resistance, depending on the concrete strength class, values given for non-cracked ( ucrRk, ) or cracked concrete ( rcRk, ) in the corresponding European Technical Specification d mm diameter of the ancho
31、r rod or outer diameter of internally threaded sleeves hef mm embedment depth 6.2.2.2 Effect of axial spacing and edge distances The geometric effect of axial spacing and edge distance on the characteristic resistance is taken into account by the value 0 p,Np,N/ A A, where 0 p,N A: = scr,Np scr,Np,
32、reference bond influence area of an individual fastener (3) p,N A actual bond influence area, limited by overlapping areas of adjacent fasteners (s 100 mm. 6.2.2.6 Effect of the eccentricity of the load The factor Npec, takes account of a group effect when different tension loads are acting on the i
33、ndividual fasteners of a group. 1 /21 1 Npcr,N Npec, se - (11) with: eN: eccentricity of the resulting tensile load acting on the tensioned fasteners (see CEN/TC 1992-4-1:2009, 5.2). Where there is an eccentricity in two directions, Npec, shall be determined separately for each direction and the pro
34、duct of both factors shall be inserted in Equation (1). 6.2.3 Concrete cone failure The characteristic resistance of a single tensioned fastener and a group of tensioned fasteners in case of concrete cone failure may be obtained by Equation (12). CEN/TS 1992-4-5:2009 (E) 9 ec,Nre,Ns,N o c,N c,No cRk
35、, cRk, A A NN N (12) The different factors of Equation (12) are given below. 6.2.3.1 Characteristic resistance of a single fastener Cracked concrete: The characteristic resistance of a single fastener placed in cracked concrete and not influenced by adjacent fasteners or edges of the concrete member
36、 is obtained by: 1,5 ef cubeck,cr o cRk, hfkN N (13) where kcr factor to take into account the influence of load transfer mechanisms for applications in cracked concrete, the actual value is given in the corresponding European Technical Specification. fck,cubeN/mm2 characteristic cube strength of th
37、e concrete strength class but noting the limitations given in the relevant European Technical Specification. hef mm see CEN/TS 1992-4-1:2009, Figure 5, the actual value is given in the corresponding European Technical Specification. NOTE For fasteners according to current experience the value is 7,2
38、 or 8,5. The actual value for a particular fastener may be taken from the relevant European Technical Specification. Non-cracked concrete: The characteristic resistance of a single fastener placed in non-cracked concrete and not influenced by adjacent fasteners or edges of the concrete member is obt
39、ained by: 1,5 ef cubeck,ucr 0 cRk, hfkN N (14) with kucr factor to take into account the influence of load transfer mechanisms for applications in non-cracked concrete, the actual value is given in the corresponding European Technical Specification. CEN/TS 1992-4-5:2009 (E) 10 Key 1 Idealised concre
40、te break-out body Figure 1 Idealised concrete cone and area 0 Nc, Aof concrete cone of an individual fastener 6.2.3.2 Geometric effect of axial spacing and edge distance The geometric effect of axial spacings and edge distances on the characteristic resistance is taken into account by the value 0 Nc
41、, Nc, / AA, where 0N c, A: = reference projected area, see Figure 1 = scr,N scr,N (15) Nc, A actual area, limited by overlapping concrete cones of adjacent fasteners (s 100 mm. 6.2.3.5 Effect of the eccentricity of the load The factor Nec, takes account of a group effect when different tension loads
42、 are acting on the individual fasteners of a group. 1 /21 1 Ncr,N Nec, se - (18) with: eN: eccentricity of the resulting tensile load acting on the tensioned fasteners (CEN/TS 1992-4-1:2009, clause 5.2). Where there is an eccentricity in two directions, Nec, shall be determined separately for each d
43、irection and the product of both factors shall be inserted in Equation (12). a) Ac, N = (c1 + 0,5 scr, N) scr, N if: c1 ccr, N CEN/TS 1992-4-5:2009 (E) 12 b) Ac, N = (c1 + s1 + 0,5 scr, N) scr, N if: c1 ccr, N s1 scr, N c) Ac, N = (c1 + s1 + 0,5 scr, N) (c2 + s2 + 0,5 scr, N) if: c1; c2 ccr, N s1 ; s2 scr, N Key a) Individual fastener at the edge of a concrete member b) Group