1、 ISO 2016 Glass in building Determination of the bending strength of glass Part 4: Testing of channel shaped glass Verre dans la construction Dtermination de la rsistance du verre la flexion Partie 4: Essais sur verre profil INTERNATIONAL STANDARD ISO 1288-4 First edition 2016-02-15 Reference number
2、 ISO 1288-4:2016(E) ISO 1288-4:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechan
3、ical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Sw
4、itzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 1288-4:2016(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Symbols 2 5 Apparatus . 2 5.1 Testing machine . 2 5.2 Measuring instruments . 3 6 Sample . 3 6.1 Number of specimens . 3
5、 6.2 Specimen dimensions . 3 6.3 Specimen condition 3 7 Procedure. 4 7.1 Determination of dimensions of each specimen 4 7.2 Bending test . 4 8 Evaluation 5 9 Test report . 5 Annex A (informative) Properties of channel shaped glass 7 Bibliography 8 ISO 2016 All rights reserved iii Contents Page ISO 1
6、288-4:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject
7、 for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC)
8、on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be not
9、ed. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying
10、 any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience o
11、f users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Suppl
12、ementary information The committee responsible for this document is ISO/TC 160, Glass in building, Subcommittee SC 2, Use considerations. ISO 1288 consists of the following parts, under the general title Glass in building Determination of the bending strength of glass: Part 1: Fundamentals of testin
13、g glass Part 2: Coaxial double ring test on flat specimens with large test surface areas Part 3: Test with specimen supported at two points (four point bending) Part 4: Testing of channel shaped glass Part 5: Coaxial double ring test on flat specimens with small test surface areasiv ISO 2016 All rig
14、hts reserved INTERNATIONAL ST ANDARD ISO 1288-4:2016(E) Glass in building Determination of the bending strength of glass Part 4: Testing of channel shaped glass 1 Scope This part of ISO 1288 specifies a method for determining the bending strength (defined as the profile bending strength) of wired or
15、 unwired channel shaped glass for use in buildings. The limitations of this part of ISO 1288 are described in ISO 1288-1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references,
16、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 1288-1, Glass in building Determination of the b
17、ending strength of glass Part 1: Fundamentals of testing glass NOTE ISO TC 160 SC1 is still not certain as to whether there is a need for a standard on the product “Wired or unwired channel shaped glass”. 3 T erms a nd definiti ons For the purposes of this document, the following terms and definitio
18、ns apply. 3.1 p r o f i l e b e n d i n g s t r e n g t h quotient of the maximum bending moment and the section modulus of a channel shaped glass Note 1 to entry: Due to sideways movement of the flanges of the channel shaped profile in the bending test, the specimens break almost exclusively at the
19、 transition from web to flange (i.e. not at the extreme edge of the flange or the face of the web). Consequently, the profile bending strength is not the glass strength, but rather a value representing the strength of the profile. ISO 2016 All rights reserved 1 ISO 1288-4:2016(E) 4 Symbols B width o
20、f web m F max maximum force NOTE Where the bending rollers are not firmly attached to the testing machine, but are laid on the specimen, the force resulting from their weight is added to the maximum measured force. N G specimens own weight N h F thickness of flange m h W thickness of web m H height
21、of flange m L s distance between supporting rollers m M bB maximum bending moment Nm P bB profile bending strength Pa Z section modulus m 3 Z F section modulus with flanges in tension m 3 Z W section modulus with web in tension m 3 5 Apparatus 5.1 Testing machine The bending test shall be carried ou
22、t using a suitable bending testing machine, which shall incorporate the following features. a) The stressing of the specimen shall be capable of being applied from zero up to a maximum value in a manner which minimizes shock and is stepless. b) The stressing device shall be capable of the specified
23、rate of stressing. c) The testing machine shall incorporate a load measuring device with a limit of error of 2,0 % within the measuring range. d) The supporting rollers and the bending rollers (see Figure 2) shall have a diameter of 50 mm and a length of not less than 550 mm. All the rollers shall b
24、e free to rotate. e) The air bags (see Figure 2) shall have an overall dimension of 310 mm 1 020 mm 200 mm and shall have a safe working pressure not less than 100 kPa. The air bags shall be pressurized to 70 kPa for channel shaped glass with a nominal width up to 300 mm and 50 kPa for channel shape
25、d glass with a nominal width over 300 mm. f) The spreader plates (see Figure 2) shall have dimensions of 300 mm 1 000 mm and be sufficiently robust to adequately transmit the force into the air bags.2 ISO 2016 All rights reserved ISO 1288-4:2016(E) 5.2 Measuring instruments The following measuring i
26、nstruments are required: a measuring instrument enabling the web width, B, of the specimen to be measured to the nearest 1 mm and the flange height, H, of the specimen to be measured to the nearest 0,5 mm; a measuring instrument allowing the thickness of the specimen flange, h F , and web, h W , to
27、be measured to the nearest 0,1 mm. 6 Sample 6.1 Number of specimens The number of specimens to be tested shall be determined depending on the confidence limits required, especially with regard to estimating the extremes of the strength distribution (see ISO 1288-1 for a discussion of numbers of spec
28、imens). 6.2 Specimen dimensions The dimensions of the specimen web, B, flange height, H, the web thickness, h W , the flange thickness, h F , and the angle between the web and the flanges shall be within the tolerances specified for the product to be tested. The length of the specimens shall be 2 10
29、0 mm 5 mm. 6.3 Specimen condition The specimens shall be stored in the testing environment (see 7.2) for at least 4 h before being tested. Key 1 flange 2 principal axis 3 web Figure 1 Cross section of specimen ISO 2016 All rights reserved 3 ISO 1288-4:2016(E) 7 Procedure 7.1 Determination of dimensi
30、ons of each specimen The width of the web, B, the height of the flange, H, and the thickness of the flanges, h F , shall be measured at the ends of the profiles and in the centre of the specimen. The web thickness, h W , shall be measured only at the ends (see Figure 1 and Figure 2). 7.2 Bending tes
31、t The specimens shall be mounted as shown in Figure 2. Key 1 specimen 5 air bag 2 bending roller 6 spreader plate 3 supporting roller 7 foam slab 4 rubber pad L s 2 000 mm 4 mm Figure 2 Arrangement of specimen in testing machine Rubber strips, 6 mm thick and of hardness of not less than (40 10) IRHD
32、, (in accordance with ISO 48), shall be placed between the specimen and the supporting rollers.4 ISO 2016 All rights reserved ISO 1288-4:2016(E) When testing with the web in tension, a foam slab (expanded polystyrene or similar), not less than 1 000 mm in length and of width 10 mm less than the inte
33、rnal space between the flanges, shall be placed under the air bag to prevent it from applying the load directly to the flanges. The bending test shall be carried out at (23 5) C with the relative humidity between 40 % and 70 %. During the test, the temperature shall be kept constant to 1 C in order
34、to avoid development of thermal stresses. The specimen shall be bent with a uniformly increasing bending stress at a rate of (2 0,4) MPa/s until failure occurs. The maximum force, F max , shall be measured and the time taken to reach this force shall be recorded. 8 Evaluation The profile bending str
35、ength, P bB , shall be calculated in accordance with Formula (1): (1) The appropriate value of section modulus, Z, used for the calculation, depends on whether the flange is in tension (Z F ) or the web is in tension (Z W ). The bending strength shall be calculated with the section modulus and weigh
36、t for the nominal dimensions of the profile, provided that the permissible dimensional tolerances for the profile are not exceeded. Values for G, Z Fand Z Ware given in Annex A for a non-exhaustive list of commonly available channel profiles. Where the permissible dimensional tolerances are exceeded
37、, the section modulus and weight shall be calculated separately for each specimen. 9 Test report The test report shall include the following information: a) a reference to this part of ISO 1288, i.e. ISO 1288-4; b) description of the profile, either by trade name or by specifying the nominal dimensi
38、ons of web width, flange height, web thickness and flange thickness; In the case of channels with wire, include a description of the wire; c) the angle of deviation from a right angle, if the apparent deviation of the flange from a right angle is visually apparent; d) number of specimens; e) for eac
39、h specimen: 1) measured thicknesses of flanges and web to the nearest 0,1 mm; 2) measured web width to the nearest 1 mm and flange height to the nearest 0,5 mm; 3) whether tested with flange or web in tension; 4) section modulus and weight used for calculation; 5) profile strength, P bB , in MPa to
40、the nearest 1 MPa; 6) time to breakage in seconds, to the nearest 1 s. No average for the measured results shall be given; f) the number of specimens not broken in accordance with Clause 8; ISO 2016 All rights reserved 5 ISO 1288-4:2016(E) g) any deviation from this part of ISO 1288 which may have a
41、ffected the results.6 ISO 2016 All rights reserved ISO 1288-4:2016(E) Annex A (informative) Properties of channel shaped glass Table A.1 gives values of the self weight and section modulus for some of the more commonly available channel shaped glass products. Table A.1 Values of G, Z Fand Z Wfor a n
42、on-exhaustive selection of commonly available channel sections Dimensions in millimetres Width of web Height of f l a n ge Glass thickness G N Z F mm 3 Z W mm 3 232 41 6 89 5 210 22 670 232 60 7 117 13 000 47 910 262 41 6 98 5 260 24 570 262 60 7 127 13 150 52 420 270 40 6 100 5 020 23 920 331 41 6
43、119 5 370 28 490 331 60 7 151 13 430 62 070 498 41 6 169 5 540 36 030 748 41 6 245 5 700 43 300 ISO 2016 All rights reserved 7 ISO 1288-4:2016(E) Bibliography 1 ISO 16293-1, Glass in building Basic soda lime silicate glass products Part 1: Definitions and general physical and mechanical properties8 ISO 2016 All rights reserved ISO 1288-4:2016(E) ISO 2016 All rights reserved IC S 81.040.20 Price based on 8 pages
