1、 Reference number ISO 22452:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 22452 First edition 2011-06-15 Timber structures Structural insulated panel walls Test methods Structures en bois Murs en panneaux isolants structurels Mthodes dessai ISO 22452:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All ri
2、ghts reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of t
3、he requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedISO 22452:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction .
4、 v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 1 4 Symbols 3 5 Product evaluation 4 5.1 Tests applicable to panel construction . 4 5.2 Tests applicable to wall panels 4 6 Structural testing . 4 6.1 Conditioning 4 6.2 Tensile test on core material and bonding between faces and core .
5、 4 6.3 Shear test on panel assembly (short-term loading) 7 6.4 Accelerated ageing tests 9 6.5 Vertical load capacity (stiffness and strength) 10 6.6 Bending properties for SIP headers (stiffness and strength) . 14 6.7 Horizontal in-plane monotonic load racking stiffness and strength test 16 6.8 Out-
6、of-plane bending (stiffness and strength) . 21 Annex A (informative) Testing for creep by means of ASTM C480 24 Bibliography 27 ISO 22452:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (I
7、SO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, gov
8、ernmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC
9、 Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the membe
10、r bodies casting a vote. 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 any or all such patent rights. ISO 22452 was prepared by Technical Committee ISO/TC 165, Timber structures.
11、 ISO 22452:2011(E) ISO 2011 All rights reserved vIntroduction The objective of this International Standard is to provide the means for the structural testing of structural insulated panel (SIP) walls. It includes tests for tensile bonding strength of the panels, ageing, shear, vertical load performa
12、nce, horizontal in-plane performance and out-of-plane bending performance. A creep test has been included in the annex for information (and trial). The tests applicable to panels for particular applications are presented, the test requirements, including laboratory conditions, are given and the numb
13、ers of samples to be tested and the reporting of results are specified. This International Standard is not intended for quality control testing or for conformity assessment. INTERNATIONAL STANDARD ISO 22452:2011(E) ISO 2011 All rights reserved 1Timber structures Structural insulated panel walls Test
14、 methods 1 Scope This International Standard specifies test methods for determining the structural properties of double-sided, wood-based, load-bearing structural insulated panels (SIPs) for use in walls. It is applicable to SIPs having two face layers, at least one of which is a wood-based structur
15、al panel, and a core made of a thermally insulating material having sufficient shear strength to cause the face layers to act together structurally. NOTE 1 Gypsum-based structural boards are commonly used as a face layer. NOTE 2 Panels can contain internal framing or bracing. 2 Normative references
16、The following referenced documents 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. ASTM C393/C393M-06, Standard Test Method for Core
17、 Shear Properties of Sandwich Constructions by Beam Flexure ASTM D7446-09, Standard Specification for Structural Insulated Panel (SIP) Adhesives for Laminating Oriented Strand Board (OSB) to Rigid Cellular Polystyrene Thermal Insulation Core Materials 3 Terms and definitions For the purposes of this
18、 document, the following terms and definitions apply. 3.1 structural insulated panel SIP panel with two load-bearing skins, one bonded to each face of a rigid, lightweight, homogenous core material with sufficient shear strength to cause the face layers to act together structurally See Figure 1. NOT
19、E The homogenous core is made of one material with no internal joints requiring bonding. ISO 22452:2011(E) 2 ISO 2011 All rights reservedKey 1 rigid core Figure 1 Cross-section of structural insulated panel 3.2 double-skin box with structural core-type structural insulated panel panel with a rigid c
20、ore surrounded by a structural frame, with or without internal ribs, and two skins mechanically fastened and/or bonded to the frame and core, forming a closed box See Figure 2. NOTE The skins, core and frame are all load-bearing. Key 1 core 2 internal structural frame Figure 2 Structural insulated p
21、anel with internal structural frame 3.3 slabstock core material which is pre-formed into slabs of thickness equal to the required depth of the core and then bonded with a suitable adhesive NOTE The length and width of a slab of core material are less than or equal to the length and width of the SIP.
22、 3.4 bonded condition of components of a structural insulated panel in which they are bonded to each other by adhesive or where foams used for cores are foamed in situ and become self-adhesive while expanding and curing so that they bond automatically to the enveloping components ISO 22452:2011(E) I
23、SO 2011 All rights reserved 34 Symbols a, b, c distances, in millimetres (mm) B width of full panel, in millimetres (mm) F load, in newtons (N) F maxmaximum load, in newtons (N) F uultimate load, in newtons (N) F max,estestimated maximum load, in newtons (N) F vvertical load, in newtons (N) D panel
24、thickness, in millimetres (mm) F gself load of loading element, in newtons (N) F g1self load of panel, in newtons (N) F g2applied permanent load, in newtons (N) F llever arm load, in newtons (N) F ploading plate and rod load, in newtons (N) F Qvariable load, in newtons (N) H height of full panel, in
25、 millimetres (mm) L span, in millimetres (mm) l length of panel sample, in millimetres (mm) R stiffness, in newtons per millimetre (N/mm); strength, in newtons per millimetre (N/mm) T loading time, in seconds (s) T rrecovery time, in seconds (s) b width of panel sample, in millimetres (mm) d cdepth
26、(thickness) of core, in millimetres (mm) e depth between the centroids of the faces, in millimetres (mm) f cttensile strength of core material, in newtons per square millimetre (N/mm 2 ) f cvshear strength of core material, in newtons per square millimetre (N/mm 2 ) t 1 , t 2overall thickness of the
27、 face in millimetres (mm) w deformations, in millimetres (mm) w ttotal deflection under constant load at time t, in millimetres (mm) w 0initial static deflection under constant load and temperature, in millimetres (mm) factor of less than unity modifying F max,est panel racking deformation, in milli
28、metres (mm) ISO 22452:2011(E) 4 ISO 2011 All rights reserved5 Product evaluation 5.1 Tests applicable to panel construction The following test regimes are applicable to the panel construction: a) tensile testing on the core and its bonding to faces; b) ageing test; c) shear strength of the solid cor
29、e and its bonding to faces. 5.2 Tests applicable to wall panels The following test regimes are applicable to the wall panel: a) vertical load (stiffness and strength); b) horizontal in-plane load (racking stiffness and strength); c) out-of-plane bending (stiffness and strength). 6 Structural testing
30、 6.1 Conditioning 6.1.1 Standard conditioning Where standard conditioning is required for the tests specified in 6.2 to 6.8, the test pieces used shall be conditioned to constant mass in an atmosphere of relative humidity of (65 5) % and temperature of (20 2) C. Constant mass is deemed to be attaine
31、d when the results of at least three successive weighings indicate that the moisture content has stabilized to within 0,5 % for at least a 48 h period. If the conditions of the testing room are not the same as those in the conditioning chamber, the test pieces shall remain in the conditioning chambe
32、r until testing. 6.1.2 Alternative conditionings Where test pieces are not conditioned or are conditioned differently from the procedure given in 6.1.1, the alternative shall be described in the test report. When required or appropriate, results may be corrected to reflect conditioning according to
33、6.1.1. The procedure for adjusting structural properties shall be technically sound and shall be recorded in the test report. 6.2 Tensile test on core material and bonding between faces and core 6.2.1 Specimen size and sampling The depth of the specimen shall be equal to the panel thickness, D. The
34、width, b, shall be 150 mm and the length, l, shall be 150 mm (see Figure 3). NOTE The purpose of this test is to determine the critical failure mechanism, in core or glue line of the SIP. ISO 22452:2011(E) ISO 2011 All rights reserved 5The test specimens should be sampled from a range of positions c
35、overing the width and length of the panel, including the centre and edge of the sampling area, shown in Figure 3. The outer 10 % of the panel perimeter is excluded from testing. Key 1 sampling area b panel width l panel length Figure 3 Specimen sampling from panel 6.2.2 Conditioning Specimens shall
36、be conditioned either in accordance with 6.1 or to a specified elevated temperature. Specimens shall be tested immediately after removal from the conditioning chamber when performing an elevated temperature test. Testing at an elevated temperature may be appropriate for certain applications, and per
37、formance of the panel unit should be verified at these conditions. If uncertain of in-service temperature levels, elevated temperature test specimens should be conditioned at 80 C for at least 4 h. No further temperature measurement is required after conditioning. 6.2.3 Loading method and test proce
38、dure Specimens shall be bonded, using a suitable adhesive, to platens of sufficient stiffness to ensure a uniform tensile stress over the area of specimen. When conditioned according to 6.1, platens shall be bonded to the specimen after conditioning. Specimens of square cross-section shall be prepar
39、ed in accordance with Figure 4. ISO 22452:2011(E) 6 ISO 2011 All rights reservedKey 1 core 2 panel face 3 load-distributing platen Figure 4 Test arrangements in core tension test The load, F, shall be applied in increments or continuously so as to reach maximum load in a period of 1 min to 5 min. Fo
40、r SIPs with OSB (oriented strand board) and polystyrene thermal insulation core materials, ASTM D7446-09, 13.2, should be referred to and considered for use, as appropriate. NOTE This test is not intended for paper-faced lining materials. ISO 22452:2011(E) ISO 2011 All rights reserved 76.2.4 Reporti
41、ng results The tensile strength, f ct , of the core material shall be calculated from the maximum load attained in a specimen failing in tension as follows: u ct F f bl where F uis the ultimate load carried by the specimen failing in tension. The test report shall include the following information:
42、a) sampling procedure; b) number of specimens tested; c) specification for the test panels; d) specification of the materials used in the manufacture of the test panels; e) detailed description of the test specimens, including any deviations from the specification; f) type of any failure, stating wh
43、ether failure was in adhesion, cohesion or another mode; failure of the bond between board face and loading platen should be recorded separately; g) any conditioning applied to the specimens, and the test laboratory conditions; h) the tensile strength, f ct , of each specimen and the mean of all tes
44、t results; i) any other appropriate information. NOTE If failure occurs at bond, then the f ctvalue is quoted as the default. 6.3 Shear test on panel assembly (short-term loading) 6.3.1 General This test shall be applied to SIPs with no additional internal frames. The behaviour of panels with intern
45、al frames or internal ribs shall be established from the out-of-plane bending test (see 6.8). Specimens shall be conditioned in accordance with 6.1. 6.3.2 Specimen size and sampling The specimen (1 000 mm 150mm) shall be cut from full-sized SIPs (single-panel units before assembly/jointing, often 1,
46、2 m 2,4 m). The test specimens should be sampled from a range of positions covering the width and length of the panel, including the centre and edge of the sampling area shown in Figure 3. The outer 10 % of the panel perimeter is excluded from testing. If the 1 000 mm span does not result in a shear
47、 failure in the first test, the span shall be reduced in increments of 100 mm in subsequent tests until shear failure is obtained. Subsequent tests shall then be carried out at the reduced span. NOTE The intent is to induce a shear failure in the specimen. 6.3.3 Loading method and test procedure The
48、 load, F, shall be applied equally at the 1/3 points of the span between the supports (see Figure 5). Apply the load until failure occurs. The loading rate shall be such as to result in failure between 1 min and 5 min after the start of the test. If the SIP has two dissimilar faces, the weaker of th
49、e two faces shall be placed in compression. ISO 22452:2011(E) 8 ISO 2011 All rights reservedFigure 5 Test arrangement in shear test on SIP (no internal frame) The metal strips or similar at the supports and load points shall equal the specimen width plus 50 mm in length, 50 mm in width and 15 mm in thickness. If local crushing of the core occurs in the first test, increase the width until crushing is prevented. See Figure 6. NOTE The radius of the ball bearings are typically in the range of 15 mm.
