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

Introduction to Seismic Essentials in Groningen

4.2

Introduction to Eurocode 8

By Kubilây Hiçyılmaz MSc - Arup

Eurocode for Seismic

NEN-EN 1998 (Eurocode 8) Design of structures for earthquake resistance NPR 9998:2015 Dutch Practical Guideline Part 1 General rules, seismic actions and rules for buildings Yes 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 geotechnical aspects Yes Part 6 Towers, masts and chimneys No

Eurocode 8 | permission granted by CEN - CENELEC NPR 9998:2015 | permission granted by NEN - Delft

Eurocode 8 and NPR 9998:2015

Eurocode 8: Design of structures for earthquakes resistance Part 5: Foundations, retaining structures and geotechnical aspects Eurocode 8: Design of structures for earthquakes resistance Part 1: General rules, seismic actions and rules for buildings

EN 1998-3

Eurocode 8: Design of structures for earthquakes resistance Part 3: Assessment and retrofitting of buildings

EN 1998-1 EN 1998-5

December 2015 December 2004 June 2005

November 2004

Seismic Hazard Map

PGA map Oct 2015 by KNMI - Figure 3.1 of NPR9998:2015 permission granted by NEN - Delft

NPR 9998:2015 Not incorporated in NPR 9998:2015

PGA map June 2016 by KNMI | Publication PSHA | V2 | CC0

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

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

Seismic analysis and design

Ref: Table 4.1 NPR9998:2015 permission granted by NEN

Behaviour factor – basic value q0

St Structural Type DCM DCM DC DCH

Frame system, dual system, coupled wall system 3,0 αu/α1 4,5 αu/α1 Uncoupled wall system 3,0 4,0 αu/α1 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

Systems regular in elevation – Example Concrete

Non-structural components

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

National Choices

Nati tional Cho Choices NEN EN-EN 1998 1998-3 NPR PR 9998 9998:2015

Informative annexes Annexes A-C: Reinforced concrete, steel and composite, masonry Annexes A-F: Inspection, Strengthening, Use of NPR for many buildings, Liquefaction, subsidence, non-linear analysis Number of limit states 3 (NC-SD-DL) 1 (NC) – existing buildings Return periods under which limit states should not be exceeded 2475 years for NC 475 years for SD 225 years for DL 800 years (CC1b) -NC 1500 years (CC2) - NC 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 level Geometry Details Materials Analysis CF

KL1 From original outline construction drawings with sample visual survey

• r from full survey

Simulated design in accordance with relevant practice and from limited in-situ inspection Default values in accordance with standards of the time of construction and limited in-situ testing LF-MRS CFKL1 KL2 From incomplete original detailed construction drawings with limited in-situ inspection or from extended in-situ inspection From original design specifications with limited in-situ testing

• r from extended in-situ

testing All CFKL2 KL3 From original detailed construction drawings with limited in-situ inspection

• r from comprehensive in-

situ inspection From orginal test reports with limited in-situ testing

• r from comprehensive

in-situ testing All CFKL3 Ref: table 3.1 - EN 1998-3: 2005

Eurocode 8 | permission granted by CEN - CENELEC NPR 9998:2015 | permission granted by NEN - Delft

Summary

Eurocode 8: Design of structures for earthquakes resistance Part 5: Foundations, retaining structures and geotechnical aspects Eurocode 8: Design of structures for earthquakes resistance Part 1: General rules, seismic actions and rules for buildings

EN 1998-3

Eurocode 8: Design of structures for earthquakes resistance Part 3: Assessment and retrofitting of buildings

EN 1998-1 EN 1998-5

December 2015 December 2004 June 2005

November 2004

Thank you for your attention!

4.2

References and further reading

EN 1998 - Eurocode 8 (2004-2005). Design of structures for earthquake resistance - 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.