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BS EN 1999-1-5:2023

BS EN 1999-1-5:2023

$215.11

Eurocode 9. Design of aluminium structures – Shell structures

Published By Publication Date Number of Pages
BSI 2023 80
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1.1 Scope of EN 1999-1-5 (1) EN 1999-1-5 applies to the structural design of aluminium structures, stiffened and unstiffened, that have the form of a shell of revolution or of a round panel in monocoque structures. (2) EN 1999-1-5 covers additional provisions to those given in the relevant parts of EN 1999 for design of aluminium structures. NOTE Supplementary information for certain types of shells is given in EN 1993-1-6 and the relevant application parts of EN 1993 which include: – Part 3-1 for towers and masts; – Part 3-2 for chimneys; – Part 4-1 for silos; – Part 4-2 for tanks; – Part 4-3 for pipelines. (4) The provisions in EN 1999-1-5 apply to axisymmetric shells (cylinders, cones, spheres) and associated circular or annular plates, beam section rings and stringer stiffeners, where they form part of the complete structure. (5) Single shell panels (cylindrical, conical or spherical) are not explicitly covered by EN 1999-1-5. However, the provisions can be applicable if the appropriate boundary conditions are duly taken into account. (6) Types of shell walls covered in EN 1999-1-5 can be (see Figure 1.1): – shell wall constructed from flat rolled sheet with adjacent plates connected with butt welds, termed ā€œisotropicā€; – shell wall with lap joints formed by connecting adjacent plates with overlapping sections, termed ā€œlap-jointedā€; – shell wall with stiffeners attached to the outside, termed ā€œexternally stiffenedā€ irrespective of the spacing of stiffeners; – shell wall with the corrugations running up the meridian, termed ā€œaxially corrugatedā€; – shell wall constructed from corrugated sheets with the corrugations running around the shell circumference, termed ā€œcircumferentially corrugatedā€. [Figure 1.1 – Illustration of cylindrical shell form] (7) The provisions of EN 1999-1-5 are intended to be applied within the temperature range defined in EN 1999-1-1. The maximum temperature is restricted so that the influence of creep can be neglected. For structures subject to elevated temperatures associated with fire, see EN 1999-1-2. (8) EN 1999-1-5 does not cover the aspect of leakage. 1.2 Assumptions (1) The general assumptions of EN 1990 apply. (2) The provisions of EN 1999-1-1 apply. (3) The design procedures are valid only when the requirements for execution in EN 1090-3 or other equivalent requirements are complied with. (4) For the design of new structures, EN 1999 is intended to be used, for direct application, together with EN 1990, EN 1991, EN 1992, EN 1993, EN 1994, EN 1995, EN 1997 and EN 1998. (5) EN 1999 is intended to be used in conjunction with: – European Standards for construction products relevant for aluminium structures; – EN 1090-1, Execution of steel structures and aluminium structures – Part 1: Requirements for conformity assessment of structural components; – EN 1090-3, Execution of steel structures and aluminium structures – Part 3: Technical requirements for aluminium structures.

PDF Catalog

PDF Pages PDF Title
2 undefined
12 1 Scope
14 2 Normative references
3 Terms, definitions and symbols
22 4 Basis of design
23 5 Materials and geometry
6 Durability
7 Structural analysis
27 8 Ultimate limit state
37 9 Serviceability limit states
38 Annex A (normative)Formulae for shell buckling analysis
A.1 Use of this annex
A.2 Scope and field of application
A.3 Unstiffened cylindrical shells of constant wall thickness
A.3.1 Notations and boundary conditions
39 A.3.2 Meridional (axial) compression
A.3.2.1 General
A.3.2.2 Critical meridional buckling stresses
40 A.3.2.3 Meridional buckling parameter
41 A.3.3 Circumferential (hoop) compression
A.3.3.1 General
A.3.3.2 Critical circumferential buckling stresses
43 A.3.3.3 Circumferential buckling parameter
44 A.3.4 Shear
A.3.4.1 General
A.3.4.2 Critical shear buckling stresses
45 A.3.4.3 Shear buckling parameters
A.3.5 Meridional (axial) compression with coexistent internal pressure
A.3.5.1 Pressurized critical meridional buckling stress
46 A.3.5.2 Pressurized meridional buckling parameters
A.3.6 Combinations of meridional (axial) compression, circumferential (hoop) compression and shear
48 A.4 Unstiffened cylindrical shells of stepwise wall thickness
A.4.1 General
A.4.1.1 Notations and boundary conditions
A.4.1.2 Geometry and joint offsets
49 A.4.2 Meridional (axial) compression
A.4.3 Circumferential (hoop) compression
A.4.3.1 Critical circumferential buckling stresses
53 A.4.3.2 Buckling strength verification for circumferential compression
A.4.4 Shear
A.4.4.1 Critical shear buckling stress
54 A.4.4.2 Buckling strength verification for shear
A.5 Unstiffened lap jointed cylindrical shells
A.5.1 Geometry and stress resultants
A.5.2 Meridional (axial) compression
A.5.3 Circumferential (hoop) compression
55 A.5.4 Shear
A.6 Unstiffened conical shells
A.6.1 General
A.6.1.1 Notation
A.6.1.2 Boundary conditions
56 A.6.1.3 Geometry
A.6.2 Design buckling stresses
A.6.2.1 Equivalent cylinder
A.6.3 Buckling strength verification
A.6.3.1 Meridional compression
57 A.6.3.2 Circumferential (hoop) compression
A.6.3.3 Shear and uniform torsion
A.7 Stiffened cylindrical shells of constant wall thickness
A.7.1 General
A.7.2 Isotropic walls with meridional stiffeners
A.7.2.1 General
58 A.7.2.2 Meridional (axial) compression
A.7.2.3 Circumferential (hoop) compression
A.7.2.4 Shear
59 A.7.3 Isotropic walls with circumferential stiffeners
A.7.4 Circumferentially corrugated walls with meridional stiffeners
A.7.4.1 General
60 A.7.4.2 Axial compression
61 A.7.4.3 Stiffened wall treated as carrying axial compression only in the stiffeners
62 A.7.4.4 Circumferential (hoop) compression
63 A.7.5 Axially corrugated walls with ring stiffeners
A.7.5.1 General
A.7.5.2 Axial compression
A.7.5.3 Circumferential (hoop) compression
64 A.7.6 Stiffened wall treated as an orthotropic shell
A.7.6.1 General
A.7.6.2 Axial compression
66 A.7.6.3 Circumferential (hoop) compression
A.7.6.4 Shear
67 A.7.7 Equivalent orthotropic properties of corrugated sheeting
68 A.8 Unstiffened spherical shells under uniform circumferential compression
A.8.1 Notations and boundary conditions
69 A.8.2 Critical buckling stresses
A.8.3 Circumferential buckling parameter
71 Annex B (informative)Formulae for buckling analysis of tori-conical and tori-spherical shells
B.1 Use of this Annex
B.2 Scope and field of application
B.3 Notations and boundary conditions
72 B.4 External pressure
B.4.1 Critical external pressure
73 B.4.2 Uniform squash limit external pressure
75 B.4.3 External pressure buckling parameter
B.5 Internal pressure
B.5.1 Critical internal pressure
76 B.5.2 Uniform squash limit internal pressure
77 B.5.3 Internal pressure buckling parameter

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BS EN 1999-1-5:2023
$215.11