NA-TO-BS-EN-1996-1-2-2005.pdf
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1、NA to BS EN 1996-1-2:2005 UK National Annex to Eurocode 6: Design of masonry structures Part 1-2: General rules Structural fire design ICS 13.220.50; 91.010.30; 91.080.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW NATIONAL ANNEX Licensed Copy: London South Bank University
2、, London South Bank University, Sun Jun 17 07:00:48 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2007 ISBN 978 0 580 49784 4 The following BSI references relate to
3、the work on this standard: Committee reference B/525/6 Draft for comment 06/30128382 DC Publication history First published May 2007 Amendments issued since publication Amd. no.DateText affected NA to BS EN 1996-1-2:2005 Licensed Copy: London South Bank University, London South Bank University, Sun
4、Jun 17 07:00:48 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20071 NA to BS EN 1996-1-2:2005 National Annex (informative) to BS EN 1996-1-2:2005, Eurocode 6: Design of masonry structures Part 1-2: General rules Structural fire design Introduction This National Annex has been prepared by BSI Subcom
5、mittee B/525/6, Use of masonry. It is to be used in conjunction with BS EN 1996-1-2:2005. NA.1 Scope This National Annex gives: a)decisions for the Nationally Determined Parameters described in the following subclauses of BS EN 1996-1-2:2005: 2.2(2)actions; 2.3(2)design value of material properties;
6、 2.4.2(3)member analysis; 3.3.3.1(1)thermal elongation; 3.3.3.2(1)specific heat capacity; 3.3.3.3thermal conductivity; 4.5(3)assessment by tabulated data; Annex Bvalues of tF and lF. b)decisions on the use of informative Annexes A, C, D and E; c)references to non-contradictory complementary informat
7、ion to assist the user to apply BS EN 1996-1-2:2005 (see NA.4). NA.2 Nationally Determined Parameters NOTE No values are given for the symbols in clauses NA.2.1 to NA.2.7, as the calculation methods given in Annexes C and D will not be used in the UK. In the event that a calculation method becomes a
8、vailable in a non-contradictory complementary publication, the recommended values for the symbols given in the relevant notes in BS EN 1996-1-2 may be considered to be acceptable for use. NA.2.1Actions see BS EN 1996-1-2:2005, 2.2(2) The value of m, the emissivity of a masonry surface: nvg NA.2.2Des
9、ign values for material properties see BS EN 1996-1-2:2005, 2.3(2) M,fi for thermal properties for the fire situation: nvg M,fi for mechanical properties for the fire situation: nvg Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:00:48 GMT+00:00 2007, Uncontr
10、olled Copy, (c) BSI NA to BS EN 1996-1-2:2005 2 BSI 2007 NA.2.3Member analysis see BS EN 1996-1-2:2005, 2.4.2(3) G, the partial factor for permanent actions: nvg Q,1, the partial factor for variable action 1: nvg NA.2.4Thermal elongation see BS EN 1996-1-2:2005, 3.3.3.1(1) The values for T (), the v
11、ariation of the thermal elongation with temperature: nvg NA.2.5Specific heat capacity see BS EN 1996-1-2:2005, 3.3.3.2(1) The values for ca, the specific heat capacity with temperature: nvg NA.2.6Thermal conductivity see BS EN 1996-1-2:2005, 3.3.3.3 The values for a, the thermal conductivity with te
12、mperature: nvg NA.2.7Assessment by tabulated data see BS EN 1996-1-2:2005, 4.5(3) The values for Glo: nvg NOTE No value of Glo is given, as it is only needed when fire tests are to be performed, or existing fire tests have to be interpreted. A value may be assessed from the NA to BS EN 1996-1-1:2005
13、, Tables NA.1 and NA.2 (M) and the NA to BS EN 1990:2002, Table NA.A1.2 (noting that F is given there in terms of G and Q, as applied to dead and imposed loads respectively). In arriving at the values of tF and lF in NA.3, account has been taken of the global safety factor applicable to the fire tes
14、t data that was used to formulate the tables. The tables applicable to = 0.6 may be used when the verification of vertical load capacity indicates that only up to 0.6 of the permitted design vertical load resistance is being used. = 1.0 should be used when more than 0.6 of the permitted capacity is
15、being used. NA.3 Annex B Tabulated values of fire resistance of masonry walls (values of tF and lF) see BS EN 1996-1-2:2005, Annex B, Note 4 NOTE The values chosen are presented in tabular form and, for ease of use, each table retains the numbering of its counterpart in BS EN 1996-1-2:2005, Annex B.
16、 Those tables in that document that are not relevant are not given in this National Annex. Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:00:48 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20073 NA to BS EN 1996-1-2:2005 NA.3.1Clay masonry see BS EN 1996-1
17、-2:2005, Table N.B.1.1 The values in respect of N.B.1.1 are as given in Table NA.1.1 Table NA.1.1Clay masonry minimum thickness of separating non-loadbearing walls (criteria EI) for fire resistance classifications Row No.Material properties: gross density, kg/m Minimum wall thickness, in mm, tF for
18、fire resistance classification EI for time (minutes) tfi,d 306090120180240 1.SGroup 1S units 1.S.1Mortar : general purpose, thin layer, lightweight W 1 200 1.S 1.1 1.S 1.2 65 (65) 65 (65) 90 (90) 100 (100) 170 (100) 170 (140) 1.Group 1 units 1.1Mortar : general purpose, thin layer, lightweight W 1 0
19、00 1.1.1 1.1.2 65 (65) 100 (65) 100 (90) 100 (100) 170 (140) 200 (170) 2Group 2 units 2.1Mortar : general purpose, thin layer, lightweight W 700 25% 700 25% perforation u 40% 2.1.1 2.1.2 u 1,0 100 (100) 130 (130) 215 (215) 215 (215) 240 (215) 240 (240) 2.1.3 2.1.4 u 0,6 100 (100) 130 (130) 215 (215)
20、 215 (215) 240 (215) 240 (240) Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:00:48 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20075 NA to BS EN 1996-1-2:2005 NA.3.3Clay masonry see BS EN 1996-1-2, Table N.B.1.6 The values in respect of N.B.1.6 are as gi
21、ven in Table NA.1.6. The tabulated thicknesses are for the loaded leaf of a cavity wall where the loaded leaf is subjected to fire. The non-loaded leaf may be of a dissimilar masonry material to the loaded leaf, but should otherwise conform to the relevant masonry materials specification. In such ca
22、ses, the respective thickness of each leaf of the cavity wall, relevant to masonry unit and mortar, should be that as specified in the appropriate materials specification table. Table NA.1.6Clay masonry minimum thickness of each leaf of separating loadbearing cavity walls with one leaf loaded (crite
23、ria REI) for fire resistance classifications Row no.Material properties: gross density, kg/m Minimum wall thickness, in mm, tF for fire resistance classification REI for time (minutes) tfi,d 306090120180240 1SGroup 1S and Group 1 units 1S.1Mortar: general purpose, thin layer W 1 000 1S.1.1 1S.1.2 u
24、1,0 90 (90) 90 (90) 100 (90) 100 (100) 170 (140) 170 (140) 1S.1.3 1S.1.4 u 0,6 90 (90) 90 (90) 100 (90) 100 (100) 170 (140) 170 (140) 2Group 2 units 2.1Mortar: general purpose, thin layer W 700 25% perforation u 40% 2.1.1 2.1.2 u 1,0 100 (100) 130 (130) 215 (215) 215 (215) 240 (240) 240 (240) 2.1.3
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