CEN/TR 17080:2018
(Main)Design of fastenings for use in concrete - Anchor channels - Supplementary rules
Design of fastenings for use in concrete - Anchor channels - Supplementary rules
EN 1992-4:2018 covers anchor channels located in cracked or uncracked concrete subjected to tensile loads and/or shear loads transverse to the longitudinal channel axis as well as combinations of these loads. Shear loads acting in direction of the longitudinal axis of the channel and combinations of shear loads acting transverse and in direction of the longitudinal axis of the channel, combinations of tensile loads and shear loads acting in direction of the longitudinal axis of the channel and combinations of loads in all three directions are excluded.
This Technical Report provides design rules for anchor channels under static and quasi-static shear loads acting in direction of the longitudinal channel axis and all possible combinations of shear and tension loads acting on the channel as well as design rules for anchor channels with supplementary reinforcement to take up shear loads, additional and alternative to the provisions of EN 1992- 4:2018. All relevant failure modes are considered and will be verified. Fatigue, impact and seismic loads are not covered.
The design rules in this document are only valid for anchor channels with a European Technical Product Specification. The design provisions for shear loads acting in direction of the longitudinal axis of the channel cover the following anchor channels and applications:
- Anchor channels with 2 or 3 anchors.
- Anchor channels where the shear load in the longitudinal axis of the channel is transferred to the channel by corresponding locking channel bolts creating mechanical interlock by means of a notch in the channel lips or serrated channel bolts which interlock with serrated lips of the channel (Figure 1).
- Anchor channels produced from steel with at least two metal anchors rigidly connected to the back of the channel (e.g. by welding, forging or screwing). The anchor channels are placed flush with the concrete surface. A fixture is connected to the anchor channel by channel bolts with nut and washer.
- Anchor channels close to the edge placed either parallel or transverse to the edge of the concrete member. The design provisions for concrete edge failure do not cover channel orientations inclined to the concrete edge.
The design method for anchor channels loaded in shear in direction of the longitudinal axis of the channel follows closely the existing design model for headed fasteners. For reasons of simplicity modifications specific for anchor channels are used where necessary.
The design provisions for the supplementary reinforcement to take up shear loads in case of anchor channels situated parallel to the edge and loaded in shear transverse to the longitudinal axis apply to anchor channels with unlimited number of anchors.
Examples of anchor channels and channel bolts ensuring mechanical interlock are given in Figure 1.
Bemessung der Verankerung von Befestigungen in Beton - Ankerschienen - Ergänzende Regelungen
Conception et calcul des fixations pour béton - Rails insert - Règles supplémentaires
Projektiranje pritrjevanja za uporabo v betonu - Odprti profili za sidranje - Dodatna pravila
Standard EN 1992-4 obravnava odprte profile za sidranje, nameščene v razpokani ali nerazpokani beton, izpostavljen nateznim obremenitvam in/ali strižnim obremenitvam prečno na vzdolžno os odprtega profila, pa tudi kombinacije teh obremenitev. Strižne obremenitve v smeri vzdolžne osi odprtega profila in kombinacije strižnih obremenitev, ki delujejo prečno in v smeri vzdolžne osi odprtega profila, kombinacije nateznih obremenitev in strižnih obremenitev, ki delujejo v smeri vzdolžne osi odprtega profila, ter kombinacije obremenitev v vseh treh smereh niso zajete.
To tehnično poročilo določa pravila projektiranja za odprte profile za sidranje pod statičnimi in navideznimi statičnimi strižnimi obremenitvami, ki delujejo v smeri vzdolžne osi odprtega profila, ter za vse možne kombinacije strižnih in nateznih obremenitev, ki delujejo na odprti profil, pa tudi pravila projektiranja za odprte profile za sidranje z dodatno ojačitvijo, ki prevzema strižne obremenitve, in sicer dodatno k določbam standarda EN 1992-4 ali namesto njih. Upoštevani so vsi ustrezni modeli odpovedi in bodo tudi preverjeni. Utrujanje, sunki in seizmične obremenitve niso obravnavani.
Pravila projektiranja v tem dokumentu veljajo samo za odprte profile za sidranje z evropsko tehnično specifikacijo za izdelke. Določbe projektiranja za strižne obremenitve, ki delujejo v smeri vzdolžne osi odprtega profila obravnavajo naslednje odprte profile za sidranje in načine uporabe:
– odprti profili za sidranje z 2 ali 3 sidri;
– odprti profili za sidranje, pri katerih se strižna obremenitev v smeri vzdolžne osi odprtega profila prenaša na odprti profil z ustreznimi zaklepnimi profilnimi vijaki, ki ustvarjajo mehansko zaporo z zarezo v ustju odprtega profila, ali nazobčanimi profilnimi vijaki, ki se zataknejo v nazobčano ustje odprtega profila (slika 1);
– odprti profili za sidranje, izdelani iz jekla, z najmanj dvema kovinskim sidroma, trdno povezanima z zadnjim delom odprtega profila (npr. z varjenjem, kovanjem ali vijaki). Odprti profili za sidranje se namestijo poravnano s površino betona. Vezni element je povezan z odprtim profilom za sidranje s profilnimi vijaki z matico in podložko;
– odprti profili za sidranje blizu roba, nameščeni vzporedno ali prečno na rob betonskega elementa. Določbe projektiranja za odpoved betonskega roba ne obravnavajo usmeritev odprtega profila z nagibom proti betonskemu robu.
Metoda projektiranja za odprte profile za sidranje, strižno obremenjene v smeri vzdolžne osi odprtega profila, natančno upošteva obstoječi model projektiranja za vezna sredstva z glavo. Zaradi poenostavitve so za odprte profile za sidranje uporabljene prilagoditve, kjer je potrebno.
Določbe projektiranja za dodatno ojačitev, ki prevzema strižne obremenitve v primeru odprtih profilov za sidranje, nameščenih vzporedno z robom in strižno obremenjenih v prečni smeri na vzdolžno os, veljajo za odprte profile za sidranje z neomejenim številom sider.
Primeri odprtih profilov za sidranje in profilnih vijakov, ki zagotavljajo mehansko zaporo, so prikazani na sliki 1.
(...)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2018
Projektiranje pritrjevanja za uporabo v betonu - Odprti profili za sidranje - Dodatna
pravila
Design of fastenings for use in concrete - Anchor channels - Supplementary rules
Bemessung der Verankerung von Befestigungen in Beton - Ankerschienen - Ergänzende
Regelungen
Conception et calcul des fixations pour béton - Rails insert - Règles supplémentaires
Ta slovenski standard je istoveten z: CEN/TR 17080:2018
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
91.080.40 Betonske konstrukcije Concrete structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEN/TR 17080
TECHNICAL REPORT
RAPPORT TECHNIQUE
September 2018
TECHNISCHER BERICHT
ICS 21.060.01; 91.080.40
English Version
Design of fastenings for use in concrete - Anchor channels -
Supplementary rules
Bemessung der Verankerung von Befestigungen in
Beton - Ankerschienen - Ergänzende Regelungen
This Technical Report was approved by CEN on 9 April 2017. It has been drawn up by the Technical Committee CEN/TC 250.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17080:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 6
3 Terms, definitions, symbols and units . 6
4 Basis of design . 8
5 Durability . 9
6 Derivation of forces acting on anchor channels - Analysis . 9
6.1 General . 9
6.2 Tension loads . 10
6.3 Shear loads . 10
6.3.1 Shear loads V acting transverse to the longitudinal axis of the channel . 10
Ed,y
6.3.2 Shear loads V acting in direction of the longitudinal axis of the channel . 10
Ed,x
7 Verification of ultimate limit state . 13
7.1 Tension load . 13
7.2 Shear load . 13
7.2.1 Shear load V acting transverse to the longitudinal channel axis . 13
Ed,y
7.2.2 Shear load V acting in direction of the longitudinal axis of the channel . 13
Ed,x
7.3 Combined tension and shear loads . 19
7.3.1 Anchor channels without supplementary reinforcement . 19
7.3.2 Anchor channels with supplementary reinforcement. 21
8 Improved model for the design of anchor channels close to an edge subjected to a
shear load transverse to the longitudinal channel axis with supplementary
reinforcement . 22
8.1 General . 22
8.2 Anchor channels arranged parallel to the edge . 22
8.2.1 General . 22
8.2.2 Characteristic resistance . 25
9 Verification of serviceability limit state . 27
Bibliography . 28
European foreword
This document (CEN/TR 17080:2018) 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 shall not be held responsible for identifying any or all such patent rights.
Introduction
CEN/TR 17080 provides supplementary rules for the design of anchor channels for cases not currently
covered by EN 1992-4:2018, namely,
— the design of anchor channels subject to shear force acting in the longitudinal direction of the
channel;
— the design for the combined action of longitudinal shear, transverse shear and tension load acting
on the anchor channel; and
— the design of supplementary reinforcement for anchor channels subject to shear force in
longitudinal direction.
The proposed design rules follow closely the design model for headed fasteners. They have been
derived from the results of current research.
In addition, rules alternative to EN 1992-4 for the design of supplementary reinforcement to carry
shear loads transverse to the longitudinal axis of the channel are given.
This Technical Report is intended to be used in conjunction with EN 1992-4.
The numerical values for partial factors and other reliability parameters are recommended values and
may be changed in a National Annex of EN 1992-4, if required. The recommended values apply when:
a) the anchor channels comply with the requirements of EN 1992-4:2018, 1.2, and
b) the execution complies with the requirements of EN 1992-4:2018, 4.6 and Annex F.
NOTE The proposed design method for shear loading acting in longitudinal direction of the channel can be
realized only if the relevant parameters as specified in this CEN/TR, e.g. characteristic resistances and product
dependent partial factors are given in a European Technical Product Specification.
1 Scope
EN 1992-4:2018 covers anchor channels located in cracked or uncracked concrete subjected to tensile
loads and/or shear loads transverse to the longitudinal channel axis as well as combinations of these
loads. Shear loads acting in direction of the longitudinal axis of the channel and combinations of shear
loads acting transverse and in direction of the longitudinal axis of the channel, combinations of tensile
loads and shear loads acting in direction of the longitudinal axis of the channel and combinations of
loads in all three directions are excluded.
This Technical Report provides design rules for anchor channels under static and quasi-static shear
loads acting in direction of the longitudinal channel axis and all possible combinations of shear and
tension loads acting on the channel as well as design rules for anchor channels with supplementary
reinforcement to take up shear loads, additional and alternative to the provisions of EN 1992-4:2018.
All relevant failure modes are considered and will be verified. Fatigue, impact and seismic loads are not
covered.
The design rules in this document are only valid for anchor channels with a European Technical Product
Specification. The design provisions for shear loads acting in direction of the longitudinal axis of the
channel cover the following anchor channels and applications:
— Anchor channels with 2 or 3 anchors.
— Anchor channels where the shear load in the longitudinal axis of the channel is transferred to the
channel by corresponding locking channel bolts creating mechanical interlock by means of a notch
in the channel lips or serrated channel bolts which interlock with serrated lips of the channel
(Figure 1).
— Anchor channels produced from steel with at least two metal anchors rigidly connected to the back
of the channel (e.g. by welding, forging or screwing). The anchor channels are placed flush with the
concrete surface. A fixture is connected to the anchor channel by channel bolts with nut and
washer.
— Anchor channels close to the edge placed either parallel or transverse to the edge of the concrete
member. The design provisions for concrete edge failure do not cover channel orientations inclined
to the concrete edge.
The design method for anchor channels loaded in shear in direction of the longitudinal axis of the
channel follows closely the existing design model for headed fasteners. For reasons of simplicity
modifications specific for anchor channels are used where necessary.
The design provisions for the supplementary reinforcement to take up shear loads in case of anchor
channels situated parallel to the edge and loaded in shear transverse to the longitudinal axis apply to
anchor channels with unlimited number of anchors.
Examples of anchor channels and channel bolts ensuring mechanical interlock are given in Figure 1.
Key
a) notching channel bolt creating a notch in the channel
b) channel with serrated lips and matching locking channel bolt
Figure 1 — Anchor channels with mechanical interlock - Examples
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1992–1-1, Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for buildings
EN 1992–1-2, Eurocode 2: Design of concrete structures — Part 1-2: General rules — Structural fire
design
EN 1992-4:2018, Eurocode 2 — Design of concrete structures — Part 4: Design of fastenings for use in
concrete
3 Terms, definitions, symbols and units
For the purposes of this document, the terms and definitions given in EN 1992-4 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
NOTE This clause includes only terms, definitions and symbols supplementary to EN 1992-4.
3.1 Terms and definitions
3.1.1
notching channel bolt
channel bolt (EN 1992-4:2018, 3.1.10) creating a notch in the channel lip to transfer a shear load by
mechanical interlock in the longitudinal axis of the channel (Figure 1a))
3.1.2
locking channel bolt
channel bolt (EN 1992-4:2018, 3.1.10) interlocking with serrated channels lips by means of matching
serrations (Figure 1b))
3.1.3
serrated channel
anchor channel (EN 1992-4:2018, 3.1.2) with special serrations formed into the lips of the channel. The
channel bolts used to fix to this channel have matching serrations (Figure 1b))
3.1.4
direction x
direction in the longitudinal axis of the channel
3.1.5
direction y
direction transverse to the longitudinal axis of the channel
3.2 Symbols:
a design tension force acting on the anchor
N
Ed
cb
design tension force acting on the channel bolt
N
Ed
ch
design tension force acting on the channel
N
Ed
N design tension resistance for a certain failure mode
Rd,i
N
design tension resistance for steel failure modes, in general
Rd,s
N design tension steel resistance of the anchor
Rd,s,a
N design tension steel resistance of the connection between channel and anchor
Rd,s,c
N design tension steel resistance of the channel bolt
Rd,s,cb
N
design tension steel resistance of the channel lip and mechanical interlock
Rd,s,l
N characteristic tension resistance of the hooked part of a rebar
Rk,hook,i
N characteristic tension bond resistance of a rebar
Rk,bond,i
a
design shear force acting on the anchor in direction of the channel axis
V
Ed,x
a
design shear force acting on the anchor tran
...
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