NA to BS EN 1991-1-1-2002 UK National Annex to Eurocode 1 Actions on structures - Part 1-1 General actions - Densities self-weight imposed loads for buildings《欧洲法规1的英国国家附录 对建筑物的作用 .pdf

1、NATIONAL ANNEXNA to BS EN 1991-1-1:2002UK National Annex to Eurocode 1: Actions on structures Part 1-1: General actions Densities, self-weight, imposed loads for buildingsICS 91.010.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g

2、3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSINA to BS EN 1991-1-1:2002This National Annex was published under the authority of the Standards Policy and Strategy Committee on 30

3、 December 2005 BSI 30 December 2005First edition December 2005 The following BSI references relate to the work on this National Annex:Committee reference B/525/1Draft for comment 03/700514ISBN 0 580 47335 XCommittees responsible for this British StandardThe preparation of this National Annex was ent

4、rusted by Technical Committee B/525, Building and civil engineering structures, to Subcommittee B/525/1, Actions (loadings) and basis of design, upon which the following bodies were represented:Association of Consulting EngineersBritish Constructional Steelwork AssociationBritish Masonry SocietyBuil

5、ding Research EstablishmentConcrete SocietyHealth and Safety ExecutiveHighways AgencyInstitution of Civil EngineersInstitution of Structural EngineersNational House Building CouncilOffice of the Deputy Prime MinisterSteel Construction InstituteSummary of pagesThis document comprises a front cover, a

6、n inside front cover, page i, a blank page, pages 1 to 11 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled

7、Copy, (c) BSINA to BS EN 1991-1-1:2002 BSI 30 December 2005iContentsPageCommittees responsible Inside front coverIntroduction 1NA.1 Scope 1NA.2 Nationally Determined Parameters 1NA.3 Decisions on the status of informative annexes 10NA.4 References to non-contradictory complementary information 10Bib

8、liography 11Table NA.1 Characteristic values of self-weight UK guidance on additional provisions for bridges 3Table NA.2 Categories for residential, social, commercial and administration areas including additional sub-categories for the UK 4Table NA.3 Imposed loads on floors, balconies and stairs in

9、 buildings 6Table NA.4 Categories for storage and industrial areas including additional sub-categories for the UK 7Table NA.5 Imposed floor loads due to storage 7Table NA.6 Imposed loads on garages and vehicle traffic areas 8Table NA.7 Imposed loads on roofs not accessible except for normal maintena

10、nce and repair 8Table NA.8 Horizontal loads on partition walls and parapets 9Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSIblankLicensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSINA to BS EN 1991-1-1:2002 BSI 30 December 20051N

11、ational Annex (informative) to BS EN 1991-1-1:2002, Eurocode 1: Actions on structures Part 1-1: General actions Densities, self-weight, imposed loads for buildingsIntroduction This National Annex has been prepared by BSI Subcommittee B/525/1, Actions (loadings) and basis of design. In the UK it is t

12、o be used in conjunction with BS EN 1991-1-1:2002.NA.1 ScopeThis National Annex gives:a) the UK decisions for the Nationally Determined Parameters described in the following subclauses of BS EN 1991-1-1:2002: 2.2 (3) 5.2.3 (1) to 5.2.3 (5) 6.3.1.1 (Table 6.1) 6.3.1.2 (1)P (Table 6.2) 6.3.1.2 (10) 6.

13、3.1.2 (11) 6.3.2.2 (1)P (Table 6.4) 6.3.3.2 (1) (Table 6.8) 6.3.4.2 (Table 6.10) 6.4 (1) (Table 6.12)b) the UK decisions on the status of BS EN 1991-1-1:2002 informative annexes; andc) references to non-contradictory complementary information for the following subclauses of BS EN 1991-1-1:2002: 6.3.

14、2.2 6.3.4.2 (1)NA.2 Nationally Determined ParametersNA.2.1 Dynamically susceptible structures BS EN 1991-1-1:2002, 2.2(3)NA.2.1.1 GeneralThe procedure to be used for structures that are susceptible to dynamic excitation is outlined in NA.2.1.2, NA.2.1.3 and NA.2.1.4 for particular cases of dynamic l

15、oading conditions and structural types. In such cases, the design should take account of the load-structure interaction and dynamic characteristics of the structure, e.g. natural frequency, mass, damping and mode shapes. Furthermore, for structural design with oscillation or vibration as a serviceab

16、ility criterion, separate consideration of their influence is necessary, e.g. on the operation of equipment in the building and/or on the comfort of the users and occupiers of the building.In certain cases, e.g. structures intended primarily for providing spectator facilities, the relevant certifyin

17、g authority may refer to specific guidance documents that are considered appropriate and sufficient for compliance with their requirements.NA.2.1.2 Synchronized rhythmical movementsStructures with elements subject to dancing and jumping are liable to inadvertent or deliberate synchronized movement o

18、f occupants, sometimes accompanied by music with a strong beat, such as occurs at pop concerts and aerobics events. These activities generate dynamic effects that can result in enhanced vertical and horizontal loads. If a natural frequency of a structure matches the frequency of the synchronized mov

19、ement, or an integer multiple of it, then resonance can occur that greatly amplifies the dynamic response.Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSINA to BS EN 1991-1-1:20022 BSI 30 December 2005The following three alternative procedures are recommended for

20、 such design situations.a) In addition to design using the dead and static imposed loads given for category C4 uses in Table NA.3, resonance of the structure should be avoided by limiting its natural frequencies so that the vertical frequency is greater than 8,4 Hz and the horizontal frequency is gr

21、eater than 4,0 Hz. These frequencies should be evaluated for the appropriate mode of vibration of an empty structure.b) Structural elements subject to dancing and jumping should be designed to resist the anticipated dynamic loading. The deformation should not exceed limits appropriate to the structu

22、re type. Detailed design should be carried out accounting for dynamic response of the structure and a range of load frequencies and types, and with the help of specialist advice and specialist guidance documents, e.g. BRE Digest 426, The response of structures to dynamic crowd loads 1.c) Specific gu

23、idance, as required by the certifying authority for the type of structure under consideration, should be used.NA.2.1.3 Dynamic loads from machineryDynamic effects caused by the operation of machinery depend on the type of machinery and the structural form. Designers should seek specialist guidance a

24、nd consider dynamic loads and potential resonant excitation of such structures. Guidance on actions induced by cranes and machinery is given in BS EN 1991-31).NA.2.1.4 Lightweight structures and long-span structuresWhere these structures are used as concourses and public spaces, they are likely to b

25、e subject to inadvertent or deliberate synchronized movement by people, causing dynamic excitation. The design provisions should take account of the nature and intended use of the structure, the potential number of people and their possible behaviour. Structural design should be carried out with the

26、 help of specialist advice and specialist guidance documents.NA.2.2 Characteristic values of self-weight Additional provisions specific to bridges BS EN 1991-1-1:2002, 5.2.3Additional provisions for bridges are given in BS EN 1991-1-1:2002, 5.2.3. The UK guidance on these provisions is given in Tabl

27、e NA.1.NA.2.3 Categories for residential, social, commercial and administration areas BS EN 1991-1-1:2002, 6.3.1.1The categories for residential, social, commercial and administration areas are given in BS EN 1991-1-1:2002, Table 6.1. These categories have been expanded in Table NA.2 to include addi

28、tional sub-categories for the UK.NA.2.4 Imposed loads on floors, balconies and stairs in buildings BS EN 1991-1-1:2002, 6.3.1.2 (1)PValues for minimum imposed loads on floors, balconies and stairs in buildings should be taken from Table NA.3 (as a replacement for BS EN 1991-1-1:2002, Table 6.2) for

29、the categories of residential, social, commercial and administration areas described in Table NA.2.NA.2.5 Reduction factor for imposed loads for floors and accessible roofs BS EN 1991-1-1:2002, 6.3.1.2 (10)The reduction factor Ashould be determined using Equation (NA.1) instead of BS EN 1991-1-1:200

30、2, Equation (6.1):whereNOTE Loads that have been specifically determined from knowledge of the proposed use of the structure do not qualify for reduction.1)In preparation.A= 1,0 A/1 000 U 0,75 (NA.1)A is the area (m2) supported.Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled

31、Copy, (c) BSINA to BS EN 1991-1-1:2002 BSI 30 December 20053Table NA.1 Characteristic values of self-weight UK guidance on additionalprovisions for bridgesNA.2.6 Reduction factors for imposed loads from several storeys BS EN 1991-1-1:2002, 6.3.1.2 (11)The reduction factor nshould be determined using

32、 Equation (NA.2) instead of BS EN 1991-1-1:2002, Equation (6.2):wheren is the number of storeys with loads qualifying for reduction (see Note).Load reductions based on area in NA.2.5 may be applied if A10Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSINA to BS EN

33、 1991-1-1:20024 BSI 30 December 2005Table NA.2Categories forresidential,social,commercialand administration areas including additionalsub-categoriesfor the UKCategoryof loadedareaSpecific useSub-categoryExampleAAreasfor domesticand residential activitiesA1Allusageswithinself-containeddwellingunits (

34、aunit occupiedbyasingle familyor amodular student accommodation unitwith a secure door and comprising not more than six singlebedrooms and aninternalcorridor)Communal areas (includingkitchens) inblocks offlats with limited use (see Note 1). For communal areas inother blocks offlats,seeA5, A6andC3A2B

35、edrooms anddormitories exceptthose inself-containedsinglefamilydwellingunits andinhotelsand motelsA3Bedrooms inhotels andmotels; hospital wards; toilet areasA4Billiard/snooker roomsA5Balconies in singlefamilydwellingunits andcommunal areas inblocks offlats with limiteduse (seeNote 1)A6Balconies in h

36、ostels, guest houses, residential clubs and communalareas in blocks offlats except those covered by Note 1A7Balconies in hotels and motelsBOfficeareasB1General use other than in B2B2At or below groundfloor levelCAreas where people maycongregate (with the exception of areas definedunder category A, B

37、 andD)C1Areas with tables C11Public, institutional andcommunaldiningrooms and lounges, cafes and restaurants(seeNote2)C12Reading rooms with nobook storageC13ClassroomsC2Areas with fixed seatsC21Assembly areas with fixed seating (see Note 3)C22Places of worshipC3Areas without obstacles for moving peo

38、pleC31Corridors, hallways, aisles ininstitutional typebuildings not subjectedto crowds or wheeledvehicles, hostels, guest houses, residential clubs, and communalareas inblocksofflatsnot coveredbyNote 1Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSINA to BS EN 19

39、91-1-1:2002 BSI 30 December 20055Table NA.2Categories forresidential,social,commercialand administration areas including additionalsub-categoriesfor theUK (continued)Categoryof loadedareaSpecific useSub-categoryExampleC32Stairs, landingsininstitutional typebuildings not subjected to crowds or wheele

40、d vehicles, hostels, guest houses, residentialclubs, andcommunal areas inblocks of flats not covered byNote 1C33Corridors, hallways, aislesinall buildingsnot coveredbyC31and C32,including hotelsand motelsand institutional buildings subjected to crowdsC34Corridors, hallways, aislesinall buildingsnot

41、coveredbyC31and C32,including hotelsand motelsand institutional buildings subjected towheeledvehicles, includingtrolleysC35Stairs, landingsinall buildings not coveredbyC31 and C32, includinghotelsand motels andinstitutional buildingssubjectedto crowdsC36Walkways Light duty (access suitable for one p

42、erson, walkway widthapprox600mm)C37WalkwaysGeneral duty (regular two-way pedestriantraffic)C38Walkways Heavy duty (high density pedestrian traffic includingescape routes)C39Museumfloors and art galleries for exhibitionpurposesC4Areas with possible physicalactivitiesC41Dance halls and studios, gymnas

43、ia, stages (see Note 5)C42Drill halls and drillrooms (see Note 5)C5Areas susceptible to large crowdsC51Assembly areas without fixed seating,concert halls, bars andplaces of worship (see Note4 and Note 5)C52Stages in public assemblyareas (see Note5)DShoppingareasD1Areas in general retail shopsD2Areas

44、 indepartmentstoresNOTE 1 Communal areas inblocks offlats withlimited use are blocks offlats not more than threestoreys inheightand withnotmorethanfourself-contained dwelling units per flooraccessible from one staircase.NOTE 2 Where the areas described by C11 might besubjected toloadsdue tophysical

45、activitiesorovercrowding,e.g. a hotel dining roomusedas a dance floor, imposedloads shouldbebasedonC4 orC5 as appropriate.Reference should alsobe made to Note 5.NOTE 3 Fixed seating is seating where its removal and the use of the space for other purposes is improbable.NOTE 4 For grandstands and stad

46、ia,reference should be made totherequirementsofthe appropriate certifyingauthority.NOTE 5 For structures thatmight besusceptible toresonanceeffects,reference should bemadetoNA.2.1.Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSINA to BS EN 1991-1-1:20026 BSI 30 D

47、ecember 2005Table NA.3 Imposed loads on floors, balconies and stairs in buildingsCategory of loaded area qkkN/m2QkkNCategory A A1 1,5 2,0A2 1,5 2,0A3 2,0 2,0A4 2,0 2,7A5 2,5 2,0A6 Same as the rooms to which they give access but with a minimum of 3,02,0 (concentrated at the outer edge)A7 Same as the

48、rooms to which they give access but with a minimum of 4,02,0 (concentrated at the outer edge)Category B B1 2,5 2,7B2 3,0 2,7Category C C11 2,0 3,0C12 2,5 4,0C13 3,0 3,0C21 4,0 3,6C22 3,0 2,7C31 3,0 4,5C32 3,0 4,0C33 4,0 4,5C34 5,0 4,5C35 4,0 4,0C36 3,0 2,0 C37 5,0 3,6 C38 7,5 4,5C39 4,0 4,5C41 5,0 3

49、6C42 5,0 7,0C51 5,0 3,6C52 7,5 4,5Category D D1/D2 4,0 3,6Licensed Copy: Wang Bin, na, Fri Apr 14 02:00:39 BST 2006, Uncontrolled Copy, (c) BSINA to BS EN 1991-1-1:2002 BSI 30 December 20057NA.2.7 Categories for storage and industrial areas BS EN 1991-1-1:2002, 6.3.2.1 (1)PThe categories for storage and industrial areas are given in BS EN 1991-1-1:2002, Table 6.3. These categories have been expanded in Table NA.4 to include additional sub-categories for the UK.Table NA.4 Categories for storage and industri