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1、AS/NZS 4284:2008 Australian/New Zealand Standard Testing of building facades AS/NZS 4284:2008 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 AS/NZS 4284:2008 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee BD-080, Curtain Walls. It was approved on behal
2、f of the Council of Standards Australia on 7 July 2007 and on behalf of the Council of Standards New Zealand on 11 March 2008. This Standard was published on 28 April 2008. The following are represented on Committee BD-080: Association of Consulting Engineers Australia Australian Aluminium Council A
3、ustralian Building Codes Board Australian Glass and Glazing Association Australian Steel Institute Building Research Association of New Zealand Engineers Australia NATSPEC National Association of Testing Authorities Australia National Precast Concrete Association Australia Plastics and Chemicals Ind
4、ustries Association Window Association of New Zealand Additonal Interests: Independent Chair Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions ar
5、e published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased. Detailed information about j
6、oint Australian/New Zealand Standards can be found by visiting the Standards Web Shop at .au or Standards New Zealand web site at www.standards.co.nz and looking up the relevant Standard in the on-line catalogue. Alternatively, both organizations publish an annual printed Catalogue with full details
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8、 We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Please address your comments to the Chief Executive of either Standards Australia or Standards New Zealand at the address shown on the
9、 back cover. This Standard was issued in draft form for comment as DR 07156. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 AS/NZS 4284:2008 Australian/New Zealand Standard Testing of building facades First published as AS/NZS 4284:1995. Second edition 2008. COPYRIGHT Standards Australia/S
10、tandards New Zealand All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Jointly published by Standards Australia, GPO Box 476, Sydney, NSW 2001 and S
11、tandards New Zealand, Private Bag 2439, Wellington 6020 ISBN 0 7337 8619 7 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 AS/NZS 4284:2008 2 PREFACE This Standard was prepared by the Joint Australia/New Zealand Standards Committee BD-080 on Curtain Walls to supersede AS/NZS 4284:1995. The
12、Standard is based on Specification for the performance testing of building facades by the SIROWET method published by CSIRO, Division of Building, Construction and Engineering now it is known as Manufacturing and Infrastructure Technology. This Standards is derived from publication by the CSIRO on t
13、he method of facade testing developed by the CSIRO and known as SIROWET. These publications are the following: (i) The SIROWET Rig, for testing weatherproofness of building facades by N.G. Brown and E.R. Ballantyne, CSIRO Division of Building Research 1975. (ii) Specification for the performance Tes
14、ting of Building Faade by the SIROWET Method, January 1990. Division of Building, Construction Specification for the Performance Testing of Building Facades by the SIROWET Method, June 1992 ISBN 0 643 050930. This specification (TR92/6) is effective from 30 June 1992 and supersedes (TR 90/2) dated F
15、ebruary 1990. Consideration has been given to maintaining compatibility with NZS 4211:1985, Specification for performance of windows and with Amendment No. 3 which converts the earlier working stress basis to limit state design requirements. It should be noted that the water test pressure calculated
16、 in NZS 4211 Amendment No 3 is based on an alternative serviceability wind pressure definition and not equivalent to serviceability pressure determined in AS/NZS 1170.2. The objective of this Standard is to provide those persons or organizations involved with the specification, design, purchasing an
17、d construction of building facades with a method for determining the performance of a building facade under wind and other optional loadings. This test method is applicable to complete facades and is intended to assess the overall system performance and interaction of the various facade components.
18、The Committee has made a number of significant changes and additions to the original SIROWET method and these include the following: (a) Change to limit state principles from working stress. (b) Addition of optional seal degradation, seismic and building maintenance unit (BMU) restraint tests. (c) A
19、ddition of several appendices, including a pro forma for test loads and limits. Test pressures nominated in the Standard represent minimum default values that should be applied to the test sample; however, selection of pressure values should be based on the proposed usage of the structure, its expos
20、ure conditions and of the expected performance of the facade. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 3 AS/NZS 4284:2008 For high rise residential and commercial building facades (buildings typically greater than 25 m) or at particularly exposed sites that incorporate curtain wall,
21、strip windows, opening window sashes, sliding doors, bifolding doors and the like, the methods of test described in this Standard are applicable to prove performance of the system. Facade elements in these situations can be subjected to the same environmental factors such as a continuous facade on a
22、n office buildingparticularly wind-driven rain. The non-uniform nature of wind- driven rain has led to the adoption in this Standard of the cyclic pressure water test and the SIROWET method before it. Appropriate additional testing parameters, such as those described in Table 2.2 of AS 20471999, Win
23、dows in buildingsSelection and installation and AS 4420.31996, WindowsMethods of test, Method 3: Operating force test as well as the torsional rigidity of building elements as covered in Clause 13 of NZS 4211:1985 Specification for performance of windows, should also be considered for relevant eleme
24、nts. The term informative has been used in this Standard to define the application of the appendix to which it applies. An informative appendix is only for information and guidance. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 AS/NZS 4284:2008 4 CONTENTS Page 1 SCOPE5 2 REFERENCED DOCUME
25、NTS5 3 DEFINITIONS5 4 NOTATIONS6 5 PRINCIPLE6 6 APPARATUS.6 7 SAMPLE PREPARATION.7 8 PROCEDURE.8 9 PERFORMANCE REQUIREMENTS 15 10 TEST REPORT. 16 APPENDICES A INFORMATION TO BE SUPPLIED BY SPECIFIER 18 B SAMPLE PREPARATION 21 C STRENGTH TEST AT ULTIMATE LIMIT STATE LOADING 25 D AIR INFILTRATION TEST
26、ING. 30 E WATER PENETRATION TESTING 32 F SEISMIC TESTING 34 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 5 AS/NZS 4284:2008 COPYRIGHT STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND Australian/New Zealand Standard Testing of building facades 1 SCOPE This Standard sets out a method for determin
27、ing the performance of a representative building facade under simulated conditions of loading. This Standard may be applied to all types of facades including low- and high-rise, commercial, industrial and residential buildings. Tests include displacement of the facade or prototype, water penetration
28、 and structural integrity at ultimate limit state as well as optional tests, including BMU restraint, seismic loading and seal degradation. This test method is applicable to prototype testing in a test facility and on-site testing. 2 REFERENCED DOCUMENTS The following documents are referred to in th
29、is Standard: AS 1170 Structural design actions 1170.4 Part 4: Earthquake loads AS/NZS 1170 Structural design actions 1170.0 Part 0: General principles 1170.1 Part 1: Permanent, imposed and other actions 1170.2 Part 2: Wind actions NZS 1170 Structural design actions 1170.5 Part 5: Earthquake actionsN
30、ew Zealand 4211 Specification for performance of windows ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories 3 DEFINITIONS For the purpose of this Standard, the definitions below apply. 3.1 BMU Building maintenance unit. 3.2 Framing members The elements, suc
31、h as mullions and transoms that support facade panels. 3.3 Specifier The person or party responsible for the facade Specification, nominating the use of this Standard, the test sample, sequence, pressures and performance criteria. 3.4 Test facility Either a laboratory or any other facility registere
32、d by an accredited-testing agency in accordance with ISO/IEC 17025. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 AS/NZS 4284:2008 6 COPYRIGHT 3.5 Uncontrolled water Any leakage that is not contained and drained away during the water spray operation and for 5 min after the water spray has
33、 stopped during which time there is zero air pressure differential on the facade. 4 NOTATION The following symbols are used in this Standard: De = average of net end displacements, in millimetres Dm = maximum displacement of member (generally at midspan), in millimetres ds= seismic test displacement
34、 amplitude at the serviceability limit state, in millimetres du= seismic test displacement amplitude at the ultimate limit state, in millimetres Kd= deflection amplification factor, in millimetres M= overturning moment, in kilonewton metres n= number of cycles in the seismic test Rf= structural resp
35、onse factor S= span of member between points of support (transducers), in millimetres T= period of the seismic cycle, in seconds Ws= positive serviceability test pressure, in millimetres 5 PRINCIPLE A sample of the building facade forms one face of an externally mounted chamber and is sealed at its
36、perimeter and then successively subjected to a structural test, a water penetration test and a strength test. NOTES: 1Additional tests requested by the Specifier may include an air infiltration test, seismic loading by in-plane displacements, a simulated seal degradation test and a BMU restraint loa
37、d test. 2For information on sample preparation, see Appendix B. 6 APPARATUS The following apparatus is required: (a)An externally mounted chamber of a size to fit to the test sample of the building facade. The fit shall be such as to seal the perimeter of the test sample against air and water penetr
38、ation. NOTE: The use of an internally mounted pressure box is suitable for all static pressure tests but may not adequately demonstrate water penetration in pressure-equalized systems in the cyclic pressure test. (b)A reversible air pump with controls to pressurize and depressurize the chamber. (c)W
39、ater sprays positioned so that when the sprays are in operation, the external face of the test sample is covered with water. (d)Displacement transducers capable of measuring deflections to an accuracy of 0.2 mm. (e)An orifice plate or laminar flow elements or other airflow measuring device calibrate
40、d to a traceable standard. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 7 AS/NZS 4284:2008 COPYRIGHT (f)A manometer capable of measuring air pressure to an accuracy of 2% of measuring range. The manometer used during the cyclic water test shall have a fast response time of at least 0.05
41、s. 7 SAMPLE PREPARATION 7.1 Test sample The sample, with components, shall be representative both in size and shape of the facade of the building. Vertical and horizontal movement joints shall be included in the test sample. The joints shall be set on the sample within the design joint width includi
42、ng tolerances. The materials of the test sample (glass, aluminium, stone, reinforced concrete, sealants, gaskets, etc.) shall be of the same type and size, have undergone the same method of construction, and have the same details, flashing and anchorage as the building facade. If not an actual on-si
43、te representative sample of the wall of the building, the test sample shall be mounted and sealed into a simulated building frame in the same manner and by the same fixings that are intended to attach the facade to the building structure. The support frame shall be of similar stiffness to the suppor
44、ting building structure. NOTE: For discussion of the supporting structure, refer to Appendix B. Simulated floor slabs and spandrel beams shall be to actual depth if, for example, in curtain walls, the air seal is connected to the slab. The internal finishes and linings shall be installed where they
45、contribute to the air seal. The air seal of the test sample shall be continued to the air seal of the test chamber. All framing members and other interconnected joints in the facade shall be sealed at the sample boundaries. NOTE: This is to minimize the effects that the surrounding construction will
46、 have on the test performance of the sample. All pressure equalization and drainage openings in the test sample shall be left open for the duration of testing. NOTE: Transparent viewing panels (or other means of observation, such as an optical fibre probe) should be provided so that the performance
47、of the test sample in areas that are not readily seen can be observed. They should be sized and sited to have a negligible minimal effect on the water and structural performance of the test sample. 7.2 Drawings Shop drawings shall be supplied to the test facility before installation of the test samp
48、le. These drawings shall include the following: (a)Test sample elevation and vertical and horizontal sections. (b)Typical details of framing members and facade panels (including intersections of members). (c)All fixing brackets and support details. (d)Extent and type of sealants. (e)Size, position a
49、nd number of pressure equalization and drainage openings. (f)Complete building in and blanking off details around the perimeter of the sample, including the chamber details where significant to sample performance. (g)Location of transparent viewing panels if used. (h)Method of installation. (i)Location of displacement transducers. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 24 Sep 2008 AS/NZS 4284:2008 8 COPYRIGHT 8 PROCEDURE 8.1 Test sequence 8.1.1 General The sample shall be subjected to the tests in Items (a), (b), (d) and (g). The
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