BRITISH STANDARD BS EN 1993-1-6:2007 Incorporating corrigendum April 2009 Eurocode 3 Design of steel structures Part 1-6: Strength and Stability of Shell Structures ICS 91.010.30; 91.080.10
National foreword This British Standard is the UK implementation of EN 1993-1-6:2007, incorporating corrigendum April 2009. The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by CEN corrigendum April 2009 is indicated in the text by ˆ. The structural Eurocodes are divided into packages by grouping Eurocodes for each of the main materials: concrete, steel, composite concrete and steel, timber, masonry and aluminium; this is to enable a common date of withdrawal (DOW) for all the relevant parts that are needed for a particular design. The conflicting national standards will be withdrawn at the end of the co-existence period, after all the EN Eurocodes of a package are available. Following publication of the EN, there is a period allowed for national calibration during which the National Annex is issued, followed by a coexistence period of a maximum three years. During the co-existence period Member States are encouraged to adapt their national provisions. At the end of this co-existence period, the conflicting parts of national standard(s) will be withdrawn. In the UK there are no conflicting national standards. The UK participation in its preparation was entrusted by Technical Committee B/525, Building and civil engineering structures, to Subcommittee B/525/31, Structural use of steel. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Where a normative part of this EN allows for a choice to be made at the national level, the range and possible choice will be given in the normative text as Recommended Values, and a note will qualify it as a Nationally Determined Parameter (NDP). NDPs can be a specific value for a factor, a specific level or class, a particular method or a particular application rule if several are proposed in the EN. UK National Annex to BS EN 1993-1-6 To enable EN 1993-1-6 to be used in the UK, the committee has decided that no National Annex will be issued and recommend the following: all the Recommended Values should be used; all Informative Annexes may be used; and no NCCI have currently been identified. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2007 Amendments/corrigenda issued since publication Date Comments BSI 2010 28 February 2010 Implementation of CEN corrigendum April 2009, and correction to national foreword ISBN 978 0 580 66397 0
EUROPEAN STANDARD NORME EUROPÉ ENNE EUROPÄ ISCHE NORM EN 1993-1-6 February 2007 Incorporating corrigendum April 2009 ICS 91.010.30; 91.080.10 Supersedes ENV 1993-1-6:1999 English Version Eurocode 3 - Design of steel structures - Part 1-6: Strength and Stability of Shell Structures Eurocode 3 - Calcul des structures en acier - Partie 1-6: Résistance et stabilité des structures en coque Eurocode 3 - Bemessung und Konstruktion von Stahlbauten - Teil 1-6: Festigkeit und Stabilität von Schalen This European Standard was approved by CEN on 12 June 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN 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 translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉ EN DE NORMALISATION EUROPÄ ISCHES KOMITEE FÜ R NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitationinanyform and by any means reserved worldwide for CEN national Members. Ref. No. EN 1993-1-6:2007: E
EN 1993-1-6: 2007 (E) Contents Page 1. General 4 1.1 Scope 4 1.2 Normative references 5 1.3 Terms and definitions 6 1.4 Symbols 11 1.5 Sign conventions 15 2 Basis of design and modelling 15 2.1 General 15 2.2 Types of analysis 15 2.3 Shell boundary conditions 17 3 Materials and geometry 18 3.1 Material properties 18 3.2 Design values of geometrical data 18 3.3 Geometrical tolerances and geometrical imperfections 18 4 Ultimate limit states in steel shells 19 4.1 Ultimate limit states to be considered 19 4.2 Design concepts for the limit states design of shells 20 5 Stress resultants and stresses in shells 23 5.1 Stress resultants in the shell 23 5.2 Modelling of the shell for analysis 23 5.3 Types of analysis 26 6 Plastic limit state (LS1) 26 6.1 Design values of actions 26 6.2 Stress design 26 6.3 Design by global numerical MNA or GMNA analysis 27 6.4 Direct design 28 7 Cyclic plasticity limit state (LS2) 28 7.1 Design values of actions 28 7.2 Stress design 29 7.3 Design by global numerical MNA or GMNA analysis 29 7.4 Direct design 30 8 Buckling limit state (LS3) 30 8.1 Design values of actions 30 8.2 Special definitions and symbols 30 8.3 Buckling-relevant boundary conditions 31 8.4 Buckling-relevant geometrical tolerances 31 8.5 Stress design 38 8.6 Design by global numerical analysis using MNA and LBA analyses 40 8.7 Design by global numerical analysis using GMNIA analysis 43 9 Fatigue limit state (LS4) 48 9.1 Design values of actions 48 9.2 Stress design 48 2
EN 1993-1-6: 2007 (E) 9.3 Design by global numerical LA or GNA analysis 49 ANNEX A (normative) 50 Membrane theory stresses in shells 50 A.1 General 50 A.2 Unstiffened cylindrical shells 51 A.3 Unstiffened conical shells 52 A.4 Unstiffened spherical shells 53 ANNEX B (normative) 54 Additional expressions for plastic collapse resistances 54 B.1 General 54 B.2 Unstiffened cylindrical shells 55 B.3 Ring stiffened cylindrical shells 57 B.4 Junctions between shells 59 B.5 Circular plates with axisymmetric boundary conditions 62 ANNEX C (normative) 63 Expressions for linear elastic membrane and bending stresses 63 C.1 General 63 C.2 Clamped base unstiffened cylindrical shells 64 C.3 Pinned base unstiffened cylindrical shells 66 C.4 Internal conditions in unstiffened cylindrical shells 68 C.5 Ring stiffener on cylindrical shell 69 C.6 Circular plates with axisymmetric boundary conditions 71 ANNEX D (normative) 73 Expressions for buckling stress! text deleted " 73 D.1 Unstiffened cylindrical shells of constant wall thickness 73 D.2 Unstiffened cylindrical shells of stepwise variable wall thickness 83 D.3 Unstiffened lap jointed cylindrical shells 88 D.4 Unstiffened complete and truncated conical shells 90 Foreword This European Standard EN 1993-1-6, Eurocode 3: Design of steel structures: Part 1-6 Strength and stability of shell structures, has been prepared by Technical Committee CEN/TC250 «Structural Eurocodes», the Secretariat of which is held by BSI. CEN/TC250 is responsible for all Structural Eurocodes. This European Standard shall be given the status of a National Standard, either by publication of an identical text or by endorsement, at the latest by August 2007, and conflicting National Standards shall be withdrawn at latest by March 2010. This Eurocode supersedes ENV 1993-1-6. According to the CEN-CENELEC Internal Regulations, the National Standard Organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, 3