ETAG020 Plastic Anchors AnnexC 0603Final

Please download to get full document.

View again

of 13
9 views
PDF
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Document Description
European Organisation for Technical Approvals Europäische Organisation für Technische Zulassungen Organisation Européenne pour l’Agrément Technique ETAG 020 Edition March 2006 GUIDELINE FOR EUROPEAN TECHNICAL APPROVAL of PLASTIC ANCHORS FOR MULTIPLE USE IN CONCRETE AND MASONRY FOR NON-STRUCTURAL APPLICATIONS _____________________________________________ Annex C : DESIGN METHODS FOR ANCHORAGES EOTA  Kunstlaan 40 Avenue des Arts , B - 1040 Brussels ETAG 020-C Page 1 TABLE OF CONTENTS ANNE
Document Share
Documents Related
Document Tags
Document Transcript
  ETAG 020-CPage 1 ETAG 020 Edition March 2006GUIDELINE FOR EUROPEAN TECHNICAL APPROVAL of PLASTIC ANCHORSFOR MULTIPLE USE IN CONCRETE AND MASONRY FORNON-STRUCTURAL APPLICATIONS  ____________________________________________  Annex C : DESIGN METHODS FOR ANCHORAGES EOTA  Kunstlaan 40 Avenue des Arts , B - 1040 Brussels European Organisation for Technical ApprovalsEuropäische Organisation für Technische ZulassungenOrganisation Européenne pour l’Agrément Technique  ETAG 020-CPage 2 TABLE OF CONTENTS ANNEX C : DESIGN METHODS FOR ANCHORAGES INTRODUCTION1.SCOPE.........................................................................................................................................................4 1.1.Type of anchors, anchor groups and number of anchors.............................................................................41.2.Member .........................................................................................................................................................41.2.1.Concrete member ..........................................................................................................................41.2.2.Solid and hollow or perforated masonry........................................................................................41.2.3.Autoclaved aerated concrete.........................................................................................................41.3.Type and direction of load.............................................................................................................................4 2.TERMINOLOGY AND SYMBOLS...............................................................................................................5 2.1.Plastic anchors..............................................................................................................................................52.2.Base material................................................................................................................................................52.3.Actions and resistances................................................................................................................................6 3.DESIGN AND SAFETY CONCEPT..............................................................................................................6 3.1.General.........................................................................................................................................................63.2.Ultimate limit state.........................................................................................................................................73.2.1.Design resistance..........................................................................................................................73.2.2.Partial safety factors for resistances.............................................................................................73.2.2.1.Failure (rupture) of the expansion element..............................................................................73.2.2.2.Failure of the plastic anchor .....................................................................................................73.3.Serviceability limit state.................................................................................................................................7 4.STATIC ANALYSIS......................................................................................................................................8 4.1.Loads acting on anchors...............................................................................................................................84.2.Shear loads with lever arm...........................................................................................................................8 5.ULTTIMATE LIMIT STATE..........................................................................................................................9 5.1.General.........................................................................................................................................................95.2.Ultimate limit state for use in concrete..........................................................................................................95.2.1.Resistance to tension loads...........................................................................................................95.2.1.1.Required proofs........................................................................................................................95.2.1.2.Failure of the expansion element.............................................................................................95.2.1.3.Pull-out failure..........................................................................................................................95.2.1.4.Concrete cone failure.............................................................................................................105.2.2.Resistance to shear loads...........................................................................................................105.2.2.1.Required proofs......................................................................................................................105.2.2.2.Failure of the expansion element, shear load without lever arm............................................105.2.2.3.Failure of the expansion element, shear load with lever arm.................................................115.2.2.4.Concrete edge failure.............................................................................................................115.2.3.Resistance to combined tension and shear loads.......................................................................115.3.Ultimate limit state for use in masonry and in autoclaved aerated concrete...............................................12 6.SERVICEABILITY LIMIT STATE...............................................................................................................13 6.1.Displacements............................................................................................................................................136.2.Shear load with changing sign....................................................................................................................13 INTRODUCTION  ETAG 020-CPage 3 The design method for anchorages is intended to be used for the design of anchorages under due considerationof the safety and design concept within the scope of the European Technical Approvals (ETA) of plastic anchors.The design method given in Annex C is based on the assumption that the required tests for assessing theadmissible service conditions given in the relevant Parts of this Guideline have been carried out. ThereforeAnnex C is a pre-condition for assessing and judging of plastic anchors. The use of other design methods willrequire reconsideration of the necessary tests.The plastic anchors should be used for multiple fixings . By multiple anchor use it is assumed that in the case of excessive slip or failure of one anchor the load can be transmitted to neighbouring anchors without significantlyviolating the requirements on the fixture in the serviceability and ultimate limit state.Therefore the design of the fixture may specify the number n 1 of fixing points to fasten the fixture and the number n 2 of anchors per fixing point. Furthermore by specifying the design value of actions N Sd on a fixing point to a value ≤ n 3 (kN) up to which the strength and stiffness of the fixture are fulfilled and the load transfer in the case of excessiveslip or failure of one anchor need not to be taken into account in the design of the fixture.The following default values for n 1 , n 2 and n 3 should be taken:n 1   ≥ 4; n 2   ≥ 1 and n 3   ≤ 4.5 kN or n 1   ≥ 3; n 2   ≥ 1 and n 3   ≤ 3.0 kN.  ETAG 020-CPage 4 1. SCOPE1.1. Type of anchors, anchor groups and number of anchors The design method applies to the design of plastic anchors in normal weight concrete, different masonry andautoclaved aerated concrete using anchors which fulfil the requirements of this Guideline. The characteristic valuesare given in the relevant ETA.The design method is valid for single anchors and anchor groups with two or four anchors. In an anchor grouponly anchors of the same type, size and length shall be used. 1.2. Member 1.2.1. Concrete member The concrete member shall be of normal weight concrete of at least strength class C12/15 according to EN 206[5] and shall be subjected to only predominantly static loads. The design method is valid for cracked and non-cracked concrete.If the edge distance of an anchor is smaller than the edge distance c cr,N , then a longitudinal reinforcement of atleast ∅ 6 shall be provided at the edge of the member in the area of the anchorage depth. 1.2.2. Solid and hollow or perforated masonry The masonry member should be of solid or hollow or perforated masonry units made of clay or calcium silicateor normal weight concrete.The detailed information of the corresponding base material is given in the ETA (e.g. Base material, size of units,normalised compressive strength; volume of all holes (% of the gross volume); volume of any hole (% of the gross volume); minimum thickness in and around holes (web and shell); combined thickness of webs and shells (% of the overall width) . 1.2.3. Autoclaved aerated concrete The autoclaved aerated concrete member should be according to EN 771-4 [9] Autoclaved aerated concretemasonry units or prEN 12602 [10] Reinforced components of autoclaved aerated concrete . 1.3. Type and direction of load This design method applies to plastic anchors subject to static or quasi-static actions in tension, shear or combined tension and shear or bending; it is not applicable to plastic anchors loaded in compression or subjectto fatigue, impact, or seismic actions.
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks