EN 1993-4-1:2007/A1:2017
(Amendment)Eurocode 3 - Design of steel structures - Part 4-1: Silos
Eurocode 3 - Design of steel structures - Part 4-1: Silos
DOP of 12 months! * 2017-03-22 FJD - No xml version as mother version was not originally published as xml.
Eurocode 3 - Bemessung und Konstruktion von Stahlbauten - Teil 4-1: Silos
Eurocode 3 - Calcul des structures en acier - Partie 4-1 : Silos
Evrokod 3: Projektiranje jeklenih konstrukcij - 4-1. del: Silosi
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SLOVENSKI STANDARD
01-september-2017
Evrokod 3: Projektiranje jeklenih konstrukcij - 4-1. del: Silosi
Eurocode 3 - Design of steel structures - Part 4-1: Silos
Eurocode 3 - Bemessung und Konstruktion von Stahlbauten - Teil 4-1: Silos
Eurocode 3 - Calcul des structures en acier - Partie 4-1: Silos
Ta slovenski standard je istoveten z: EN 1993-4-1:2007/A1:2017
ICS:
65.040.20 3RVORSMDLQQDSUDYH]D Buildings and installations for
SUHGHODYRLQVNODGLãþHQMH processing and storage of
NPHWLMVNLKSULGHONRY agricultural produce
91.010.30 7HKQLþQLYLGLNL Technical aspects
91.080.13 Jeklene konstrukcije Steel structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1993-4-1:2007/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2017
EUROPÄISCHE NORM
ICS 65.040.20; 91.010.30; 91.080.13
English Version
Eurocode 3 - Design of steel structures - Part 4-1: Silos
Eurocode 3 - Calcul des structures en acier - Partie 4-1 : Eurocode 3 - Bemessung und Konstruktion von
Silos Stahlbauten - Teil 4-1: Silos
This amendment A1 modifies the European Standard EN 1993-4-1:2007; it was approved by CEN on 3 March 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment 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-CENELEC Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1993-4-1:2007/A1:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Modification to the Foreword . 4
2 Modifications to 1.2, Normative references . 4
3 Modification to 1.6.1, Roman upper case letters . 4
4 Modification to 1.6.2, Roman lower case letters . 4
5 Modification to 2.7, Modelling of the silo for determining action effects . 4
6 Modification to 2.9.1, General . 4
7 Modification to 2.9.2.2, Partial factors for resistances . 5
8 Modification to 2.10, Durability . 5
9 Modification to 4.2.2.1, General . 5
10 Modification to 4.2.2.3, Consequence Class 2 . 5
11 Modifications to 4.4, Equivalent orthotropic properties of corrugated sheeting . 6
12 Modifications to 5.3.2.4, Buckling under axial compression. 9
13 Modification to 5.3.2.5, Buckling under external pressure, internal partial vacuum
and wind . 10
14 Modification to 5.3.2.6, Membrane shear . 10
15 Modification to 5.3.3.3, Buckling under axial compression. 10
16 Modifications to 5.3.4.1, General . 13
17 Modifications to 5.3.4.2,Plastic limit state . 13
18 Modification to 5.3.4.3.1, General . 14
19 Modifications to 5.3.4.3.3, Stiffened wall treated as an orthotropic shell . 14
20 Modification to 5.3.4.3.4, Stiffened wall treated as carrying axial compression only in
the stiffeners . 15
21 Modification to 6.3.1,General . 20
22 Modifications to 6.3.2.5, Local flexure at the transition . 20
23 Modification to 6.3.2.7, Buckling in hoppers . 20
24 Modification to 6.4.1,Supporting structures . 21
25 Modification to 8.2.2,Uniformly supported transition junctions . 21
26 Modification to 8.3.4.3,Annular plate transition junction . 24
27 Modification to 8.5.3, Base ring . 24
28 Modification to 9.4.1, General . 25
29 Modification to 9.4.2, General bending from direct action of the stored material . 25
30 Modification to 9.5.1, Forces in internal ties due to solids pressure on them . 26
European foreword
This document (EN 1993-4-1:2007/A1:2017) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI.
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 June 2018, and conflicting national standards shall be
withdrawn at the latest by June 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Modification to the Foreword
In the Section "National Annex for EN1993-4-1", replace the following entry:
"
− 6.3.2.7 (3)"
with:
"
− 6.3.2.7 (4)".
2 Modifications to 1.2, Normative references
In the entry dedicated to EN 1990, replace "EN 1990" with "EN 1990:2002" and replace the title of this
reference with "Eurocode – Basis of structural design".
In the entry dedicated to EN 1993, in the list, replace "Part 1.6:" with "Part 1.6:2007:".
3 Modification to 1.6.1, Roman upper case letters
Replace:
"R local radius at the crest or trough of a corrugation."
ϕ
with:
"r local radius at the crest or trough of a corrugation.".
ϕ
4 Modification to 1.6.2, Roman lower case letters
Replace:
"ℓ wavelength of a corrugation in corrugated sheeting;"
with:
"l wavelength of a corrugation in corrugated sheeting;".
5 Modification to 2.7, Modelling of the silo for determining action effects
Replace Paragraph (1)P with:
"(1)P The general requirements set out in EN 1990 shall be followed.".
6 Modification to 2.9.1, General
Replace Paragraph (1)P with:
"(1)P The general requirements set out in EN 1990 shall be satisfied.".
7 Modification to 2.9.2.2, Partial factors for resistances
Add two new Paragraphs (4) and (5) after Paragraph (3)P:
"(4) Where hot rolled steel sections are used as part of a silo structure, the relevant partial factors for
resistance should be taken from EN 1993-1-1.
(5) Where cold-formed steel sections are used as part of a silo structure, the relevant partial factors for
resistance should be taken from EN 1993-1-3.".
8 Modification to 2.10, Durability
Replace Paragraph (1) with:
"(1) The general requirements set out in 2.4 of EN 1990:2002 should be followed.".
9 Modification to 4.2.2.1, General
After Paragraph (2), add the following new Paragraphs (3) to (6):
"(3) Where the silo is subject to any form of unsymmetrical bulk solids loading (patch loads, eccentric
discharge, unsymmetrical filling etc.), the structural model should be designed to capture the
membrane shear transmission within the silo wall and between the wall and rings.
NOTE The shear transmission between parts of the wall and rings has special importance in construction
using bolts or other discrete connectors (e.g. between the wall and hopper, between the cylinder wall and vertical
stiffeners or support, and between different strakes of the cylinder).
(4) Where a ring girder is used to redistribute silo wall forces into discrete supports, and where bolts or
discrete connectors are used to join the structural elements, the shear transmission between the parts
of the ring due to shell bending and ring girder bending phenomena should be determined.
(5) The stiffness of the stored bulk solid in resisting wall deformations or in increasing the buckling
resistance of the shell structure should only be considered where a rational analysis is used and there is
clear evidence that the solid against the wall is not in motion at the specified location during discharge.
In such situations, the relevant information on the flow pattern, the pressure in the solid and the
properties of the specific stored bulk solid should be determined from EN 1991-4.
(6) Where a corrugated silo exhibits mass flow, the solid held stationary within the corrugations should
not be considered as stationary in (5).".
10 Modification to 4.2.2.3, Consequence Class 2
Delete the following Paragraphs (10) to (12):
"(10) Where the silo is subject to any form of unsymmetrical bulk solids loading (patch loads, eccentric
discharge, unsymmetrical filling etc.), the structural model should be designed to capture the
membrane shear transmission within the silo wall and between the wall and rings.
NOTE The shear transmission between parts of the wall and rings has special importance in construction
using bolts or other discrete connectors (e.g. between the wall and hopper, between different strakes of the
barrel).
(11) Where a ring girder is used to redistribute silo wall forces into discrete supports, and where bolts
or discrete connectors are used to join the structural elements, the shear transmission between the
parts of the ring due to shell bending and ring girder bending phenomena should be determined.
(12) Except where a rational analysis is used and there is clear evidence that the solid against the wall is
not in motion during discharge, the stiffness of the bulk solid in resisting wall deformations or in
increasing the buckling resistance of the structure should not be considered.".
11 Modifications to 4.4, Equivalent orthotropic properties of corrugated sheeting
Replace Figure 4.2 with:
"
Key
1 effective middle surface
Figure 4.2 — Corrugation profile and geometric parameters
".
Replace the notation lines in Paragraph (3) with:
"where:
d is the crest to crest dimension;
l is the wavelength of the corrugation;
r is the local radius at the crest or trough.".
ϕ
Replace Paragraph (4):
"(4) All properties may be treated as one-dimensional, giving no Poisson effects between different
directions."
with:
"(4) The equivalent properties of the sheeting in each of the two principal directions may be treated as
independent, so that strains in one direction do not produce stresses in the orthogonal direction (i.e. no
Poisson effects).".
Replace Paragraph (5) with the following paragraph:
"(5) The equivalent membrane properties (stretching stiffnesses) may be taken as:
(4.2)
C = Et
xx
C = Et (4.3)
yy
C =Gt (4.4)
xy xy
where:
t is the equivalent thickness for the smeared membrane stiffness normal to t
...
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