Herziening Eurocodes 2020

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1 Herziening Eurocodes 2020 VNconstructeurs Ronde Tafel Gesprek Dwarskracht Standards and Regulations 1

2 Even voorstellen Mark Lurvink Consultant Structural Safety NEN (Dutch Standardization Institute) +31 (0) Standards and Regulations 2

3 Constructieve veiligheid Standards and Regulations 3

4 Normalisatie TGB Betonconstructies Normalisatie: stroomlijnt processen draagt bij tot efficiëntie zelfde taal en definities level playing field Gevolg: tijds- en kostenbesparing vergroting afzetgebied Standards and Regulations 4

5 Wat is een norm Een norm is: een vrijwillige afspraak tussen belanghebbende partijen over een product, dienst of proces Normalisatie is: het proces om tot een norm te komen Normalisatie is veel meer dan alleen het proces en document Standards and Regulations 5

6 Waarover een afspraak Wat wil ik hebben? Hoe wil ik het hebben? Wat moet ik leveren? Hoe moet ik het maken? Wat moet ik (nog) afspreken? Hoe kan ik het toetsen? Wat moeten we doen als..? Weet wat je wilt!. Standards and Regulations 6

7 Voordelen van meedoen Informatie over relevante ontwikkelingen Inhoud norm zelf medebepalen Kennisopbouw, -voorsprong en -ontwikkeling Meewerken aan innovatie (Inter)nationaal netwerken Onderscheiden van Standards and Regulations 7

8 Participeren = sturing geven Welke mate van participatie (investering) is nodig om een belang goed te kunnen verdedigen (resultaat)? 5. NL voorzitterschap en secretariaat voeren 4. Vergaderingen actief bijwonen 3. (NL-)normen vertalen en teksten inbrengen 2. Stemmen en commentaar indienen 1. Alleen stukken verspreiden 0. Niet volgen. Standards and Regulations 8

9 Constructieve veiligheid Wetgeving Eurocodes (EN 1990 t.m. EN 1999) + Nationale bijlagen Europese Productnormen Europese vervaardigingsnormen Europese beproevingsnormen Europese bouw normen Nationale normen/npr + Aanvullende informatie Klantwensen en -eisen Standards and Regulations 9

10 Eurocodes EN 1990 Veiligheid, bruikbaarheid en duurzaamheid Weerstanden (Ontwerp en detaillering) EN 1992 Beton EN 1994 Staal-beton EN 1993 Staal EN 1995 Hout EN 1996 Metselwerk EN 1999 Aluminium EN 1991 Belastingen EN 1997 Geotechniek EN 1998 Aardbevingen Standards and Regulations 10

11 Herziening Eurocodes 138 paginas meer dan 1000 eperts uit heel Europa betrokken structuur van taken en subtaken gefaseerd programma SC / WG etc Task 1 Task 2 Task n Sub-task Sub-task Sub-task Sub-task Sub-task Sub-task Sub-task Sub-task Sub-task Sub-task Sub-task Sub-task Standards and Regulations 11

12 Doelstellingen Behoud en vergroten vertrouwen Toekomstbestendig Verbeteren gebruiksgemak (Ease of Use) Verminderen NDP s (nu +/- 1500, waarvan 12% in EN 1992) Standards and Regulations 12

13 Herziening Eurocodes 58 normen 4 fases 33 lidstaten 80 SCs/WGs/TGs/AHGs 1000 medeopstellers programma 11 M EC/EFTA 75 project teams 400 PT leden duizenden Eperts in NSBs constructeurs in Europa 75 Mjrd /jaar Europese markt constr.ontw Mjrd /jaar Europese bouw Standards and Regulations 13

14 Getrapt werkprogramma Standards and Regulations 14

15 Standards and Regulations 15

16 Voor wie Standards and Regulations 16

17 Voor wie PRIMARY TARGET AUDIENCE DEFINITION Practitioners Competent engineers Competent civil, structural and geotechnical engineers, typically qualified professionals able to work independently in relevant fields Standards and Regulations 17

18 Ease of Use RESOLUTION 280 (CEN/TC 250, Helsinki, 18th June 2010) Subject: CEN/TC 250 simplification of Eurocodes CEN/TC 250 acknowledges the challenge established in the Programming Mandate M/466 addressed to CEN in the field of the Structural Eurocodes to eamine the potential for simplification of rules in the further development of the Eurocodes. CEN/TC 250 agrees to work towards achieving such simplification in the further development of the Eurocodes to support the ease of their use by designers through: (i) improving the clarity; (ii) simplifying routes through the Eurocodes; (iii) limiting, where possible, the inclusion of alternative application rules; (iv) avoiding or removing rules of little practical use in design; CEN/TC 250 agrees that such simplification should be limited to the etent that it is technically justified and should seek to avoid additional and/or empirical rules for particular structure or structural-element types. The resolution was agreed by unanimity. Standards and Regulations 18

19 Organisatie Standards and Regulations 19

20 Organisatie TGB Plenair TGB Basiseisen & Belastingen TGB Betonconstructies Vz. S. Wijte Secr. T. van den Broek VNC. M. Verbaten + M. Vullings TGB Standards and Regulations 20

21 EN 1992 Taak Fase Omschrijving - - EN Ankers SC2.T1 P1 New and modified items in EN , EN , EN SC2.T2 P2 New Items in EN SC2.T3 P2 Further new items in EN , EN , EN Standards and Regulations 21

22 EN 1992 SC2.T1 Harmonization, with consequent reduction of NDP s. Updating of some design rules taking account of scientific development since 2004 in the field of concrete structures, particularly respect to: durability with the scope to address the designer to a better fulfillment of sustainability; use of non-linear Finite Element Method; size effects in large structures; early cracking due to thermal stresses. In drafting the new work, care will be taken to be as clear as possible, to use simple routes throughout the document, and to avoid additional and/or empirical rules for particular structure or structural-element types, all to the etent that is reasonably practical. Standards and Regulations 22

23 EN 1992 SC2.T2 Sub-task name Fire resistance Brief description, background and reasons for the work Improvements are necessary in EN related to the consideration of the resistance of braced and non-braced columns (very typical solution), thermal conductivity of concrete and spalling. Addressing the design for overall structural behaviour in a more general way is necessary, bridging the robustness criteria and the fire structural engineering methods. The concept to analyze the structure at overall level in strict connection with the robustness criteria requires a strict relation with other bodies internal and eternal to CEN; the recent work of JCSS on the robustness subject and some advanced researches like Coast, together with fire structural engineering methods, will help in defining the scenarios that should be taken into account and the related safety margins. Key benefits EN will be amended by specific rules related to braced and non-braced columns, thermal conductivity of concrete and spalling; additionally a fundamental bridge will be established between structural behaviour under fire and structural robustness. A more consistent, integrated and safe design will be achieved under fire conditions. Output (e.g. new Eurocode part; new or modified clauses in eisting Eurocode part) New design rules will be added to EN ; a new chapter addressing and giving rules for the structural overall behaviour of concrete structures eposed to fire will be necessary. Standards and Regulations 23

24 EN 1992 SC3.T3 Sub-task name Key benefits Output Stainless Steel Reinforcement Assessment of eisting structures Strengthening with FRP The benefit will be appreciated in safe design for ULS, also with etreme temperatures, and in design by avoidance in durability aspects. A careful evaluation of eisting structures will be possible, with important issues both on the safety / functionality and on the actual necessity of intervention for upgrading /repair. Consequently a more sustainable approach to the eisting structures use will be achieved. The main benefit will be the rationalization of use of FRP in strengthening of eisting structures, by means of a comprehensive approach based on the definition of resisting models addressing the evaluation of safety / functionality, durability and robustness of such type of intervention. New implemented chapters on materials will be produced in EN1992, accounting for the relevant mechanical, physical and chemical parameters of stainless steel. New Anne with design / verification models will be introduced in the code and new resisting mechanism will be envisaged to define in a comprehensive approach, the actual structural behaviour. A new Anne that addresses the conceptual design and use of FRP for structural strengthening and a set of rules, both for ULS and SLS, able to give rise to safe and economical design for strengthening. Fibre Reinforced Concrete A beneficial technique, the use of fibres, for the structural performance will be finally considered in a rational frame by means of design / verification rules for all relevant limit states. The use of fibres will improve the structural performance in a very sustainable approach. The relevant parts of EN 1992 will include new rules for the verification / design of concrete structures containing metallic fibres with respect to the relevant limit states in the main tet and a new Anne. Robustness will be also considered. Standards and Regulations 24

25 Stilstand is achteruitgang Standards and Regulations 25

26 Eurocodes gaan door Year Fase1 detailed progress report October November December January February Month Month number Preparation End of the Project Team(s) Administrative (note: important for PTs) Progress report by PT Half yearly progress report including latest (as-is) draft(s) by PT preparation of consolidated report to EC/EFTA by TC250 mgt. group eternal audit of consolidated report to EC/EFTA deadline submission of report to EC/EFTA by NEN and CEN EC/EFTA assesment of consolidated report March April May June July August September October November December January February March April May June July August September October November 1 st draft (april 2016) Today 2 nd draft, followed by 2 month commenting from SC/WG Final draft, followed by 2 month commenting from SC/WG Final document [Specification, Anne C.2] Standards and Regulations 26

27 Eurocodes gaan door Fase 2 Voorzien tijdpad Year November December January February March April May June July August September October November December January February Month Month number Preparation Start of the Project (Dec 1st 2017) Preparation for Call for eperts Publication of the call for eperts (Dec 13th 2017) Call for Eperts Deadline for applications (Feb 3th 2017) PT Assesments (preselection teams) Final Assesment (March 10th 2017) Approval by EC/EFTA on PTs Start of the Project Team(s) End of the Project Team(s) Administrative (note: important for PTs) Progress report by PT Half yearly progress report including latest (as-is) draft(s) by PT preparation of consolidated report to EC/EFTA by TC250 mgt. group eternal audit of consolidated report to EC/EFTA deadline submission of report to EC/EFTA by NEN and CEN EC/EFTA assesment of consolidated report Task specific (the schedule represents the deadlines for these tasks) Start of the Project Team Preparation of first Draft by PT preparation of background document(s) by PT Delivery of first Draft by PT to NEN Review of first Draft by SC or WG Preparation of Second Draft by PT, taking into account comments from SC or WG Delivery of second draft by PT to NEN review by SC or WG preparation of Final Draft by PT, taking into account comments from SC or WG Delivery of Final Draft by PT to NEN Commenting period for NSBs (Enquiry) Preparation of Final document by PT, taking into account comments from NSBs Delivery of Background document(s) by PT to NEN Delivery of Final document by PT to NEN End of the Project Team March April May June July August September October November December January February March April May June July August September October November December January February March April May June July August September October Standards and Regulations 27

28 Eurocodes gaan door Fase 2 Voorzien tijdpad (call for tenders) Year Month Month number Preparation Start of the Project (Dec 1st 2017) Preparation for Call for eperts Publication of the call for eperts (Dec 13th 2017) Call for Eperts Deadline for applications (Feb 3th 2017) PT Assesments (preselection teams) Final Assesment (March 10th 2017) Approval by EC/EFTA on PTs Start of the Project Team(s) End of the Project Team(s) November December January February March April May June July August Standards and Regulations 28

29 Eurocodes gaan door Fase 2 Voorzien tijdpad Year Month Month number Wat doet Preparation Start of the Project (Dec 1st 2017) Preparation for Call for eperts Publication of the call for eperts (Dec 13th 2017) Call for Eperts Nederland? Deadline for applications (Feb 3th 2017) PT Assesments (preselection teams) Final Assesment (March 10th 2017) Approval by EC/EFTA on PTs Start of the Project Team(s) End of the Project Team(s) November December January February March April May June July August Standards and Regulations 29

30 Oproep vanuit NEN NL Eperts die deelnemen aan Project Teams Brede ondersteuning in en voor normcommissies: Technisch inhoudelijk Financieel Standards and Regulations 30