Essentials in Groningen Introduction to 4.2 Eurocode 8 By Kubily - PowerPoint PPT Presentation

Introduction to Seismic Essentials in Groningen

Introduction to 4.2 Eurocode 8 By Kubilây Hiçy ı lmaz MSc - Arup

Eurocode for Seismic NEN-EN 1998 (Eurocode 8) NPR 9998:2015 Design of structures for earthquake resistance Dutch Practical Guideline Part 1 General rules, seismic actions and rules for Yes buildings Part 2 Bridges No Part 3 Assessment and retrofitting of buildings Yes Part 4 Silos, tanks and pipelines No Part 5 Foundations, retaining structures and Yes geotechnical aspects Part 6 Towers, masts and chimneys No

Eurocode 8 and NPR 9998:2015 EN 1998-1 EN 1998-3 December 2004 June 2005 ICS 91.120.25 ICS 91.120.25 Eurocode 8: Design of structures for earthquakes resistance Eurocode 8: Design of structures for earthquakes resistance Part 3: Assessment and retrofitting of buildings Part 1: General rules, seismic actions and rules for buildings NPR 9998:2015 | permission granted by NEN - Delft Eurocode 8 | permission granted by CEN - CENELEC EN 1998-5 November 2004 ICS 91.120.25 Eurocode 8: Design of structures for earthquakes resistance December 2015 Part 5: Foundations, retaining structures and geotechnical aspects

Seismic Hazard Map NPR 9998:2015 Not incorporated in NPR 9998:2015 PGA map June 2016 by KNMI | Publication PSHA | V2 | CC0 PGA map Oct 2015 by KNMI - Figure 3.1 of NPR9998:2015 permission granted by NEN - Delft

Ground conditions – Eurocode 8 Part 1 Spectral Acceleration Period

Ground conditions – NPR 9998:2015 Spectral Acceleration Period

Methods of Analysis Ana nalysis is Meth thod NEN EN-EN 1998 1998-1 NPR PR 9998 9998:2015 Lateral Force (LF) Yes Yes Modal Response Spectrum (MRS) Yes Yes Non-linear static pushover (NLSP) Yes Yes Non-linear time-history (NLTH) Yes Yes

Consequences of structural regularity Seismic analysis and design Regularity Allowed Simplification Behaviour factor Plan Elevation Model Linear-elastic Analysis (for linear analysis) Yes Yes Planar Lateral Force Reference value Yes No Planar Modal Decreased value No Yes Spatial Lateral Force Reference value No No Spatial Modal Decreased value Ref: Table 4.1 Eurocode 8|part 1 permission granted by CEN Ref: Table 4.1 NPR9998:2015 permission granted by NEN

Behaviour factor – basic value q 0 Systems regular in elevation – Example Concrete Structural Type St DCM DCM DC DCH Frame system, dual system, coupled 3,0 α u / α 1 4,5 α u / α 1 wall system Uncoupled wall system 3,0 4,0 α u / α 1 Torsionally flexible system 2,0 3,0 Inverted pendulum system 1,5 2,0 ref: Table 5.1 Eurocode 8|part 1 permission granted by CEN

Non-structural components Eurocode 8 Explicit requirements for non-structural components gables infill partitions NPR 9998:2 :2015 Guidance for engineer currently excluded chimneys parapets

National Choices Nati tional Cho Choices NEN EN-EN 1998 1998-3 NPR PR 9998 9998:2015 Informative annexes Annexes A-C: Reinforced Annexes A-F: Inspection, concrete, steel and Strengthening, Use of NPR for composite, masonry many buildings, Liquefaction, subsidence, non-linear analysis Number of limit states 3 (NC-SD-DL) 1 (NC) – existing buildings Return periods under which limit 2475 years for NC 800 years (CC1b) -NC states should not be exceeded 475 years for SD 1500 years (CC2) - NC 225 years for DL 3000 years (CC3) - NC Partial factors for materials Yes Yes Confidence factors Yes No (implied in other factors) Levels of inspection and testing Yes Yes

Knowledge levels |Eurocode 8 – part 3 Knowledge Geometry Details Materials Analysis CF level Simulated design in Default values in accordance with relevant accordance with practice standards of the time of KL1 LF-MRS CF KL1 and from limited in-situ construction and limited inspection i n-situ testing From original outline From incomplete original From original design construction detailed construction specifications with drawings with KL2 drawings with limited in-situ limited in-situ testing All CF KL2 sample visual survey inspection or from extended or from extended in-situ or from full survey in-situ inspection testing From original detailed From orginal test reports construction drawings with with limited in-situ KL3 limited in-situ inspection testing All CF KL3 or from comprehensive in- or from comprehensive situ inspection in-situ testing Ref: table 3.1 - EN 1998-3: 2005

Summary EN 1998-1 EN 1998-3 December 2004 June 2005 ICS 91.120.25 ICS 91.120.25 Eurocode 8: Design of structures for earthquakes resistance Eurocode 8: Design of structures for earthquakes resistance Part 3: Assessment and retrofitting of buildings Part 1: General rules, seismic actions and rules for buildings NPR 9998:2015 | permission granted by NEN - Delft Eurocode 8 | permission granted by CEN - CENELEC EN 1998-5 November 2004 ICS 91.120.25 Eurocode 8: Design of structures for earthquakes resistance December 2015 Part 5: Foundations, retaining structures and geotechnical aspects

Thank you for your attention!

References and further reading EN 1998 - Eurocode 8 (2004-2005). Design of structures for earthquake resistance - 4.2 Part 1: General rules, seismic Actions and rules for buildings - Part 3: Assessment and retrofit of buildings and Part 5: Foundations, retaining structures and geotechnical aspects. Published by CEN/CENELEC, Brussels. NPR9998 (2015). Assessment of buildings in case of erection, construction and disapproval – Basic rules for seismic actions: induced earthquakes. Published by NEN, Delft. (2010). Manual for the seismic design of steel and concrete buildings to Eurocode 8. Published by ISE. Steenbergen, R.D.J.M., Vrouwenvelder, A.C.W.M. and Scholten, N.P.M. (ERB) (2015). TNO 2013 R1207A – Veiligheidsbeschouwing Aardbevingen Groningen t.b.v. NPR9998. Published by TNO.