SIST EN 12512:2002

Timber structures - Test methods - Cyclic testing of joints made with mechanical fasteners

This European Standard specifies a test method for determining the ductility, impairment of strength and energy dissipation properties of joints made with mechanical fasteners under cyclic loading.
NOTE   This standard is written, for uniformity, in terms of direct axial loads and their effects only. The standard is, however, also appropriate to the determination of the moment resisting properties of joints.

Holzbauwerke - Prüfverfahren - Zyklische Prüfungen von Anschlüssen mit mechanischen Verbindungsmitteln

Diese Europäische Norm legt ein Prüfverfahren für die Bestimmungen der Duktilität, Festigkeitsminderung und der Energiedissipationseigenschaften für Anschlüsse mit Verbindungsmitteln bei zyklischer Belastung fest.
ANMERKUNG   In der vorliegenden Norm werden einheitlich nur direkte axiale Beanspruchungen und deren Wirkungen behandelt. Diese Norm kann jedoch auch für die Bestimmung momentaufnehmender Eigenschaften von Verbindungen angewendet werden.

Structures en bois - Méthodes d'essai - Essais cycliques d'assemblages réalisés par organes mécaniques

La présente norme définit une procédure d'essai pour déterminer les propriétés de ductilité, d'affaiblissement de la résistance et de dissipation d'énergie des assemblages réalisés avec des organes mécaniques sous charge cyclique.
NOTE   Pour I'uniformité, cette norme est écrite en termes de charges axiales directes et de leurs effets uniquement. Cependant, la norme est également appropriée pour la détermination des propriétés du moment résistant assemblages.

Lesene konstrukcije - Preskusni postopki - Ciklično preskušanje spojev z mehanskimi veznimi sredstvi

General Information

• Status: Published
• Publication Date: 30-Jun-2002
• ICS: 21.060.01 - Fasteners in general
• ICS: 91.080.20 - Timber structures
• Technical Committee: KON - Structures
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2002
• Due Date: 01-Jul-2002
• Completion Date: 01-Jul-2002
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Ref Project: EN 12512:2001 - Timber structures - Test methods - Cyclic testing of joints made with mechanical fasteners

Relations

• Amended By: SIST EN 12512:2002/A1:2005 - Timber Structures - Test methods - Cyclic testing of joints made with mechanical fasteners
• Effective Date: 22-Dec-2008

Overview

EN 12512:2001 - "Timber structures - Test methods - Cyclic testing of joints made with mechanical fasteners" (CEN) specifies a standardized laboratory method to determine the ductility, impairment of strength and energy dissipation properties of timber joints with mechanical fasteners under cyclic loading. Written primarily in terms of direct axial loads, the standard is also appropriate for assessing moment-resisting joint behaviour. It defines test principles, required apparatus, specimen preparation, two cyclic procedures (complete and short), required results and reporting content.

Key topics and technical requirements

• Scope & purpose: Measures joint capacity under quasi‑static cyclic loading to characterise ductility, hysteretic energy dissipation and strength degradation.
• Test procedures:
  • Complete procedure: Produces full load–slip envelope through a sequence of increasing amplitude cycles (25%, 50%, 75%, Vy, 2Vy, 4Vy …) until failure or 30 mm slip.
  • Short procedure: Measures key parameters at a pre‑determined ductility D (D = Vu / Vy) using three repeated cycles at D·Vy.
• Key definitions & metrics:
  • Yield load/ slip, ultimate load/ slip, maximum load, ductility (D = Vu/Vy).
  • Impairment of strength: reduction in load between first and third cycles of same amplitude.
  • Equivalent viscous damping ratio (eq) computed from hysteresis energy: eq = Ed / (2·Ep).
• Apparatus & measurement accuracy:
  • Displacement‑controlled double‑acting testing machine (tension/compression) with stroke and load accuracy ±1%.
  • Continuous joint slip measurement with accuracy ±1%.
  • Constant slip rate between 0.02 mm/s and 0.2 mm/s.
• Specimen preparation & environment:
  • Specimens representative of real joints.
  • Conditioning typically at 20 ± 2 °C and 65 ± 5% RH; moisture content to be measured and reported.
• Reporting: Includes timber species/density, fastener type/dimensions/coatings, joint geometry, moisture content, measurement setup, procedure used, load–slip plots and calculated quantities (Fy, Fu, Vy, Vu, Fimp, eq), failure modes.

Applications and who uses EN 12512:2001

• Structural engineers and designers evaluating seismic or cyclic performance of timber connections.
• Test laboratories performing standardized cyclic tests on timber joints and fasteners.
• Manufacturers of mechanical fasteners, connectors and engineered timber systems validating product ductility and hysteretic behaviour.
• Researchers studying energy dissipation, strength degradation and connection detailing in timber structures.
• Code committees and certifiers requiring comparable, reproducible performance data for connection design and selection.

Related standards

• EN 26891 (Timber structures - Joints made with mechanical fasteners - General principles for determination of strength and deformation characteristics) - referenced normative background and guidance for monotonic test comparisons.

Keywords: EN 12512:2001, timber structures, cyclic testing, mechanical fasteners, ductility, energy dissipation, load-slip, equivalent viscous damping, impairment of strength, CEN.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzbauwerke - Prüfverfahren - Zyklische Prüfungen von Anschlüssen mit mechanischen VerbindungsmittelnStructures en bois - Méthodes d'essai - Essais cycliques d'assemblages réalisés par organes mécaniquesTimber structures - Test methods - Cyclic testing of joints made with mechanical fasteners91.080.20Lesene konstrukcijeTimber structures21.060.01Vezni elementi na splošnoFasteners in generalICS:Ta slovenski standard je istoveten z:EN 12512:2001SIST EN 12512:2002en01-julij-2002SIST EN 12512:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12512November 2001ICS 21.060.01; 91.080.20English versionTimber structures - Test methods - Cyclic testing of joints madewith mechanical fastenersStructures en bois - Méthodes d'essai - Essais cycliquesd'assemblages réalisés par organes mécaniquesHolzbauwerke - Prüfverfahren - Zyklische Prüfungen vonAnschlüssen mit mechanischen VerbindungsmittelnThis European Standard was approved by CEN on 5 October 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12512:2001 ESIST EN 12512:2002

This standard is written, for uniformity, in terms of direct axial loads and their effects only. The standard is,however, also appropriate to the determination of the moment resisting properties of joints.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications.These normative references are cited at the appropriate places in the text, and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this European Standard only when incorporated in it by amendment or revision. For undatedreferences the latest edition of the publication referred to applies (including amendments).EN 26891, Timber structures - Joints made with mechanical fasteners - General principlesfor the determination of strength and deformation characteristics (ISO 6891:1983).3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply:3.1cyclic loadalternative load in compression and tension3.2maximum loadmaximum joint load reached during test, Fmax, s
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