1、BRITISH STANDARD BS EN 13084-8:2005 Free-standing industrial chimneys Part 8: Design and execution of mast construction with satellite components The European Standard EN 13084-8:2005 has the status of a British Standard ICS 91.060.40 BS EN 13084-8:2005 This British Standard was published under the
2、authority of the Standards Policy and Strategy Committee on 16 June 2005 BSI 16 June 2005 ISBN 0 580 46038 X National foreword This British Standard is the official English language version of EN 13084-8:2005. The UK participation in its preparation was entrusted by Technical Committee B/525, Buildi
3、ng And Civil Engineering Structures, to Subcommittee B/525/13, Structural Chimneys And Flues, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or
4、 European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to incl
5、ude all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enqui
6、ries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back c
7、over. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13084-8 April 2005 ICS 91.060.40 English version Free-standing industrial chimneys - P
8、art 8: Design and execution of mast construction with satellite components Chemines auto-portantes - Partie 8: Conception et mise en oeuvre des mts intgrant des conduits systmes mtalliques Freistehende Schornsteine - Teil 8: Planung und Ausfhrung von Tragmastkonstruktionen mit angehngten Abgasanlage
9、n This European Standard was approved by CEN on 1 March 2005. 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 refe
10、rences concerning such national standards may be obtained on application to the Central Secretariat 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 i
11、nto its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani
12、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rig
13、hts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13084-8:2005: EEN 13084-8:2005 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Requirements for components.6 4.1 Support mast6 4.2 Satellite pipes.6
14、 5 General design and structural design .6 5.1 General design.6 5.1.1 General6 5.1.2 Welded pipes6 5.1.3 Prefabricated metal chimney elements .6 5.2 Structural design .7 5.2.1 General7 5.2.2 Actions7 6 Installation requirements 7 Annex A (normative) Methods for calculating cross-wind vibrations8 A.1
15、 Examples for the definition of the enveloping diameter .8 A.2 Vortex excitation8 A.2.1 Critical wind velocity .8 A.2.2 Determination of maximum oscillation amplitude ratio.9 A.2.3 Verification .11 A.3 Classical galloping 12 A.3.1 Onset velocity for classical galloping .12 A.3.2 Verification .12 Bib
16、liography 13EN 13084-8:2005 (E) 3 Foreword This document (EN 13084-8:2005) has been prepared by Technical Committee CEN/TC 297 “Free-standing industrial chimneys”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication
17、of an identical text or by endorsement, at the latest by October 2005, and conflicting national standards shall be withdrawn at the latest by October 2005. This European Standard is part 8 of the package of standards listed below: EN 13084-1, Free-standing chimneys Part 1: General requirements EN 13
18、084-2, Free-standing chimneys Part 2: Concrete chimneys EN 13084-4, Free-standing chimneys Part 4: Brick liners Design and execution EN 13084-5, Free-standing chimneys Part 5: Material for brick liners - Product specifications EN 13084-6, Free-standing chimneys Part 6: Steel liners Design and execut
19、ion EN 13084-7, Free-standing chimneys Part 7: Product specifications of cylindrical steel fabrications for use in single wall steel chimneys and steel liners EN 13084-8, Free-standing chimneys Part 8: Design and execution of mast construction with satellite components Additionally applies: EN 1993-
20、3-2, Eurocode 3: Design of steel structures Part 3-2: towers, masts and chimneys Chimneys According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmar
21、k, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 13084-8:2005 (E) 4 1 Scope This document describes the method of specifyi
22、ng the design criteria and the installation method for a free-standing mast with satellite pipes using welded pipes in accordance with prEN 13084-7 or using prefabricated metal chimney elements in accordance with Table D.1 of EN 1856-1:2003. 2 Normative references The following referenced documents
23、are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1443:2003, Chimneys - General requirements EN 1856-1:2003, Chimneys - Requirement
24、s for metal chimneys - Part 1: System chimney products EN 1856-2, Chimneys - Requirements for metal chimneys - Part 2: Metal liners and connecting flue pipes EN 1859:2000, Chimneys - Metal chimneys - Test methods EN 1990, Eurocode: Basis of structural design ENV 1991-2-4, Eurocode 1: Basis of design
25、 and actions on structures - Part 2-4: Actions on structures - Wind actions ENV 1993-3-1, Eurocode 3: Design of steel structures - Part 3-1: Towers, masts and chimneys - Towers and masts ENV 1993-3-2:1997, Eurocode 3: Design of steel structures - Part 3.2: Towers, masts and chimneys - Chimneys EN 13
26、084-1:2000, Free-standing industrial chimneys - Part 1: General requirements EN 13084-6:2004, Free-standing chimneys - Part 6: Steel liners Design and execution prEN 13084-7, Free-standing chimneys - Part 7: Product specifications of cylindrical steel fabrications for use in single wall steel chimne
27、ys and steel liners 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1443:2003, EN 1856-1:2003, EN 1859:2000 EN 13084-1:2000, EN 13084-6:2004, and the following apply. 3.1 support mast construction free-standing steel construction of a support mast and
28、 one or more attached satellite pipes (see Figure 1) 3.2 support mast component manufactured from a hollow-section or profile-cross-section which is free-standing, supported by guy wires or a building to which are attached the satellite pipes (see Figure 1) 3.3 satellite pipe component attached to t
29、he outside of the support mast carrying the flue gases (see Figure 1) EN 13084-8:2005 (E) 5 3.4 fixing band fixed structural attachment between the support mast and satellite pipes to take the horizontal loads (see Figure 1) 3.5 guide structural attachment between the support mast and satellite pipe
30、s which provides lateral support but also allows vertical movement of the satellite pipe (see Figure 1) Dimensions in metres a) construction using welded pipes in accordance with prEN 13084-7 b) construction using prefabricated metal-chimneys elements in accordance with Table D.1 of EN 1856- 1:2003
31、Figure 1 Examples of support mast construction with attached satellite pipes EN 13084-8:2005 (E) 6 4 Requirements for components 4.1 Support mast Design, materials and construction of the support mast shall comply with ENV 1993-3-1 and ENV 1993-3-2. The steel construction shall be protected against
32、corrosion in accordance with ENV 1993-3-1 and ENV 1993-3-2. 4.2 Satellite pipes Welded pipes shall comply with prEN 13084-7. Prefabricated metal chimneys elements for satellite pipes shall comply with EN 1856-1. 5 General design and structural design 5.1 General design 5.1.1 General The inner diamet
33、er of satellite pipes shall be calculated in accordance with Annex A of EN 13084-1:2000. Up to a height of 20 m EN 13384-1 may be used. The satellite pipes shall be attached to the mast without any offset. Each satellite pipe shall be fitted with a cleaning door and drain point connection. Each sate
34、llite pipe shall have only elements of the same type of pipe and same inner diameter. The outer surface temperature shall conform with that stated in EN 13084-6. Construction shall inhibit contact corrosion between different materials. Bolted connections shall have a minimum bolt size of M 12. 5.1.2
35、 Welded pipes For welded satellite pipes the distance between the fixing bands/guides to the support mast and the length of free pipe above the last support/guide shall be defined by static calculation. 5.1.3 Prefabricated metal chimney elements The maximum height of the complete construction with p
36、refabricated metal chimney elements designed in accordance with EN 1856-1 shall not exceed 30 m above ground level. The connection of prefabricated elements to the mast should be placed close to the joints of the elements and close the connecting tee and inspection element. The fixing bands or guide
37、s designed by manufacturer of the satellite pipe shall be used. For prefabricated metal chimneys the distance between horizontal supports shall not exceed 75 % of the manufacturers declared value as defined in EN 1856-1 and EN 1856-2 with a maximum of 3,0 m (maximum 1,5 m if no wind load test result
38、s from tests according to EN 1859 are available). Their free unsupported height above the last support shall not exceed 66 % of the manufacturers declared value as defined in EN 1856-1 and EN 1856-2 with a maximum of 2,0 m (maximum 1,0 m if no wind load test results from tests according to EN 1859 a
39、re available). EN 13084-8:2005 (E) 7 The maximum vertical unsupported height shall be declared by the manufacturer of the prefabricated metal chimney elements. Where necessary additional intermediate support shall be installed. 5.2 Structural design 5.2.1 General The basic design principles of EN 19
40、90 shall apply. Calculation shall be undertaken for each assembly or design type. The mast with attached satellite pipes shall be designed in their final state as well during construction phases in accordance with ENV 1993-3-1 and ENV 1993-3-2. The attached satellite pipes shall be designed in accor
41、dance with EN 13084-6 and prEN 13084-7. Prefabricated metal chimney elements shall comply with the requirements of EN 1856-1 and be certified for the intended use. 5.2.2 Actions 5.2.2.1 General EN 13084-1 applies. The action of wind shall be calculated with the enveloping diameter D (see Figure 1 of
42、 Annex A.1). 5.2.2.2 Wind actions in the direction of the wind Wind actions on the support mast construction in the direction of the wind shall be calculated in accordance with ENV 1991-2-4. An aerodynamic force coefficient of c f= 1,2 shall be used if no other value can be proven. For attached sate
43、llite pipes the aerodynamic force coefficient c f= 1,5 shall be used. If for prefabricated metal chimney elements the 3-second-wind-speed at top of the construction is more than 30 m/s additional evidence is required for the use of elements according to EN 1856-1 as they are tested according to EN 1
44、859 with a maximum load of 1,5 kN/m 2 . The gust reaction factor Bshall be calculated using a logarithmic damping decrement of B =0,1. 5.2.2.3 Vortex excitation Wind induced vibrations due to vortex excitation shall be calculated in accordance with A.1 of Annex A. 5.2.2.4 Classical galloping The sta
45、bility of the support mast construction against classical galloping vibration has to be proved in accordance with A.2 of Annex A. 6 Installation requirements For site activities reference shall be made to ENV 1993-3-2 and EN 13084-1. Manufacturers installation instructions shall be taken into accoun
46、t when using prefabricated metal chimney elements. EN 13084-8:2005 (E) 8 Annex A (normative) Methods for calculating cross-wind vibrations A.1 Examples for the definition of the enveloping diameter a) two satellite pipes b) three satellite pipes c) four satellite pipes Key d satOuter diameter of sat
47、ellite pipes s Gap between support mast and satellite pipe d supOuter diameter of support mast D The enveloping diameter of the complete installation Figure A.1 Definition of the enveloping diameter (D) A.2 Vortex excitation A.2.1 Critical wind velocity The critical wind velocity v crit , at which t
48、he frequency of vortex excitation equals the natural frequency of the whole support mast construction is given by St D f v = e crit (A.1) where f e is the natural frequency of first bending mode of the whole support mast construction St is the Strouhal number according to Equation (A.8) Resonant cri
49、tical conditions cannot occur if: ) ( m crit z v v 1,25 where EN 13084-8:2005 (E) 9 v m (z) is the mean wind velocity as defined in ENV 1991-2-4, calculated at the height z of the centre of the effective correlation length, where the vortex excitation occurs. A.2.2 Determination of maximum oscillation amplitude ratio The maximum oscillation amplitude ratio, max y F /D, occurring at critical wind speed, shall be calculated as follows: W F K St K Sc
