Some standard content:
National Standard of the People's Republic of China
GB/T50329—2002
Standard for methods testing of tinber structures
Standard for methods testing of tinber structures2002-04-25Promulgated
Ministry of Construction of the People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
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Implemented on 2002-07-01
Jointly issued
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Standard for methods testing of tinber structures
Data number: GBT
50329-2002
National Standard of the People's Republic of China
Standard for methods testing of tinber structures
Standard for methods testing of tinber structuresGB/T50329—2002
Editing department: Ministry of Construction of the People's Republic of ChinaApproving department: Ministry of Construction of the People's Republic of ChinaEffective date: July 1, 2002
Zhulong.com
2002 Beijing
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Standard for test methods for wood structures
Data number:
50329-2002
Announcement on the release of the national standard
Standard for test methods for wood structuresJianbiao [2002] No. 106
According to the requirements of the "1992 Engineering Construction Standard Formulation and Revision Plan" (Annex 2 of Jizonghe [1992] No. 490) of the State Planning Commission, Chongqing University, together with relevant units, jointly formulated the "Standard for test methods for wood structures". Our department organized relevant departments to jointly review the standard and now approved it as a national standard with the number GBT50329-2002, which will be implemented on July 1, 2002.
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Ministry of Construction of the People's Republic of China
April 25, 2002
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"Standard for Timber Structure Test Methods"
Data number:
50329-2002
National Standard "Standard for Timber Structure Test Methods" was compiled by the School of Civil Engineering of Chongqing University and relevant units in accordance with the requirements of the State Planning Commission's Document No. 490 [1992]. During the compilation process, the compilation team conducted extensive and in-depth investigations and studies, carefully summarized the practical experience and theoretical research results of my country's timber structure engineering tests, and drew on the standards of the International Organization for Standardization and foreign timber application testing, and widely solicited opinions from relevant units, experts and actual workers across the country. The draft was finalized after expert review.
This standard is managed by the Ministry of Construction, and the specific interpretation work is the responsibility of the School of Civil Engineering of Chongqing University. In the field of wood structure engineering testing and inspection, the formulation of this type of standard is the first at home and abroad, and there will definitely be many shortcomings. In order to further improve the level of this standard, all units are requested to pay attention to summarizing experience and accumulating information during the implementation process, and send questions and opinions to the School of Civil Engineering of Chongqing University (Block B, Chongqing University, Shapingba, Chongqing, Postal Code 400045) at any time for reference during revision. List of editorial units, participating units and main drafters of this standard Editorial unit: School of Civil Engineering, Chongqing University Participating units: Sichuan Academy of Building Research School of Civil Engineering, Harbin Institute of Technology
Main drafters: Huang Shaoyin, Zhou Shizhen, Wang Yongwei, Liang Tan, Ni Shizhu, Fan Chengmou, Wang Zhenjia Page 4
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Standard for Test Methods for Timber Structures)
Material No.:
50329-2002
Purpose and design of the test||tt ||Test materials and test pieces
Test equipment and conditions
Test records and reports
Statistical methods for test data
General provisions
Judgment and treatment of abnormal values
Parameter estimation
Regression analysis
Beam bending test method
General provisions
Test pieces and production
Test equipment and devices
Test steps
Test results
Axial compression bar test method
General provisions．
Test pieces and production
Test equipment and devices
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“Standard for Test Methods of Timber Structures”
Data number:
50329-2002
Test steps
Test results and summary
6 Test method for eccentric compression bars
General provisions
Test specimens and production
Test instruments and equipment
Test steps
Collation of test data
Method for determining the proportional limit of transverse grain bearing pressure
General provisions
Selection of test materials and production of test specimens.
Requirements for test equipment
Test procedures
Collation and calculation of test results
Test methods for toothed connections
General provisions
Design and production of test pieces
Test equipment and devices
Test procedures
Recording and collation of test results
Test methods for round steel pin connections
General provisions
Design and production of test pieces
Test equipment and devices
Test procedures
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Data compilation
50329-2002
Test results and collation
Test method for adhesive strength
General provisions
Gluing of test strips and preparation of test pieces
Test requirements
Collation and calculation of test results
Rules for judging test results
Test method for glued finger joints
General provisions
Test piece design
Test steps
Test Calculation and determination of results
Methods for testing trusses
Appendix A
Appendix B
General provisions
Material selection and production of test trusses
Test equipment
Test preparation
Roof truss test
Collation and analysis of test results
Estimated equilibrium moisture content of wood in some cities in my country (%)Determination of stress-strain curve of wood in compression along the grainGeneral provisions
Test specimens and production
Test equipment and devices
Test Test steps
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"Standard for Test Methods for Wood Structures"
Data number:
50329-2002
Test results
Appendix C
Rapid determination method for adhesive durability
Appendix D
Measurement method for working activity of adhesive
Determination method for penetration and retention of wood protective agent Appendix E
Appendix F
Appendix G
General provisions
Selection and preparation of tested samples.
Determination of penetration of wood protective agents,
Determination of retention of protective agents containing copper, chromium and arsenic by X-ray fluorescence analysisDetermination of retention of protective agents containing copper, chromium and arsenic by chemical titrationDetermination of retention of pentachlorophenol protective agent by lime calcined silver titrationTest for debonding of adhesive joints of components
General provisions
Basic principles
Instruments and equipment
Preparation of test pieces
Test results
Component adhesive Seam shear test
General provisions
Basic principles
Instruments and equipment
Preparation of test specimens
Test procedures
Test results
Appendix H Bending test method for wood-based structural panels - concentrated static load and impact load test,
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"Standard for Test Methods for Wood Structures"
Data number:
50329-2002||tt ||Appendix I
Appendix J
General provisions
Basic principles
Instruments and equipment
Preparation of test pieces
Test procedures
Test results
Bending test method for wood-based structural panels
General provisions
Basic principles
Instruments and equipment
Test procedures
Test results
Explanation of terms used in this standard|| tt||Page 9
Uniformly distributed load test
Standard for test methods of wood structures
Data number:
50329-2002
1 General
1.0.1 This standard is formulated to correctly reflect the actual stress conditions of wood structures in the test of wood structures, to compare and reference the test data of different test institutions, and to provide a unified test method for testers to follow. 1.0.2 This standard applies to static tests of load-bearing wood structures and components and their connections in houses and general structures under short-term loads.
For wood treated with protective agents in wood structures, when it is necessary to determine the penetration and retention of chemical agents, the provisions of Appendix E should be followed.
1.0.3 In addition to complying with this standard, the test methods of wood structures should also comply with the provisions of current relevant national standards and specifications. 2 Basic provisions
2.1 Purpose and design of test
2.1.1 When conducting wood structure tests, the test design should be carried out first. The test design can be based on the purpose and requirements of the test, and the relevant test material selection, test piece design and production, test piece quantity, test equipment, test procedures and expected test results can be comprehensively analyzed, and a detailed plan and test preparation can be made. If necessary, a preliminary test should also be carried out. 2.1.2 This standard can divide wood structure tests into two types: verification and inspection tests. Research tests on special issues can be designed in accordance with this standard based on their research purposes. 2.1.3 When it is necessary to verify the correctness of a certain calculation method, the test design and test should be carried out in accordance with this standard based on the scope of application of the method and the items to be verified. 2.1.4 When it is necessary to inspect and accept batches of components, or when there is doubt about the quality of certain structures and components, or when the reliability of existing wood structures needs to be identified through testing, sampling should be carried out according to the requirements of the inspection, and the test should be carried out according to the methods specified in this standard.
2.2 Test materials and test piecesbzxZ.net
2.2.1 The selection and storage of test materials used in the verification test shall comply with the following provisions: 1 The same batch of test wood must be of the same tree species, with the exact tree species name and origin. When conditions permit, it is advisable to sample from the forest area.
2 When the test wood is sampled from the forest area, the ends of all raw wood should be painted with paint, asphalt or other coatings that can delay the drying of the ends and prevent the ends from cracking, and should be transported back in time. When the humidity of the environment where the test materials are temporarily stacked is high, the preservative should be applied to the sample.
3 When conditions are limited, commercial wood can be used as test wood, but each test wood should have the exact tree species name. Page 10
Standard for Test Methods of Timber Structures
Material No.:
50329-2002
4 The wood used for the test must be stored indoors where it is not exposed to the sun, rain, snow or damp ground. The test materials should be stacked sparsely off the ground, and gaps should be left above, below, left and right for air circulation for each test material. 2.2.2 The selection and storage of test materials and test pieces used for inspection tests shall comply with the following provisions: 1 When the inspection is carried out according to the original pieces sent, they should be properly preserved during storage to avoid damage and change in shape of the original pieces. Properties and moisture content of the wood.
2 When sampling is required for inspection in an existing building or a certain structure, the principle of reinforcing the structure first and then sampling should be followed.
2.2.3 The moisture content of the wood must be controlled before the test. Except for specific research contents, the wood used for the test must be naturally air-dried indoors.
During the air-dried storage period, the moisture content of the test material surface can be checked by electrical measurement. However, before making the test piece, 3 to 5 test pieces must be drawn in advance, and a 15mm thick test piece must be sawed at 400mm from the end to measure the moisture content by drying method. Only after confirming that the local equilibrium moisture content has been reached, can the test piece be made and the test be carried out. The equilibrium moisture content of wood shall comply with the provisions of Appendix A of this standard.
2.2.4 The material grade of the test wood shall be specified in advance in the test design, and the material grade shall not be changed arbitrarily during the implementation. The method for determining the material grade of wood shall be determined in accordance with the relevant requirements in Appendix 2 and Section 1 of Chapter 2 of the current national standard "Code for Design of Wood Structures" GBJ5-88. 2.2.5 The production and inspection of test pieces shall meet the following requirements: 1. The production quality and deviation of test pieces used for verification test purposes shall comply with the relevant provisions of the current national standard "Standard for Acceptance of Construction Quality of Unstructured Engineering" GB50206-2002: The test pieces used for inspection test purposes shall be measured as they are, and their production quality shall be evaluated in accordance with the current "Standard for Acceptance of Construction Quality of Timber Structure Engineering". 2. The design dimensions of the key parts of the test piece shall be measured at least three times, and the average value shall be taken. 2.2.6 Before the test, the relevant data of the basic material properties of the wood used in the test batch should be obtained. When making the test piece, the required standard small test pieces (including density) should be cut from the test material near the two ends of the test piece. The production requirements, moisture content determination and test methods of various standard small test pieces should comply with the relevant provisions of "Wood Physical and Mechanical Test Methods" (GB1927-1943). The number of various standard small test pieces, in addition to meeting the requirements of this test method in this standard, should also meet the statistical provisions of Chapter 3 of this standard on test data. 2.2.7 After the test is completed, the moisture content test piece should be cut immediately near the damaged part, and the moisture content should be determined by the drying method. The size of the sample should be 20mm×20mm×20mm. There should be no less than 3 samples, and the average value should be taken. If the moisture content is measured with a 15mm thick full-section test piece, only one sample can be taken. Page 11
Technical Structure Test Method Standard
50329-2002
2.3 Test Equipment and Conditions
2.3.1 Test equipment shall meet the following requirements: 1 Testing machines or other loading equipment must be inspected and calibrated before use. The accuracy of the testing machine shall comply with the provisions of the current standard "Tensile, Compression and Universal Testing Machines" JJG139-91, which stipulates that the accuracy level is Class 1. The indication error of other loading equipment shall be within ±3%. Instruments for measuring deformation shall be calibrated before use. 2 Loading devices, support devices, lateral support devices and devices for installing observation instruments shall be firm, and shall be separated and independent from each other without interfering with each other. The above devices shall not be connected to the scaffolding for people to climb on. 3 The self-weight of the force transmission device directly placed on the test piece in the loading device should not be greater than 10% of the maximum load applied.
2.3.2 Timber structures should be tested in a laboratory with normal temperature and humidity. When conditions permit, the test of timber structures should be carried out in an environment with an indoor temperature of 20 ± 2°C and a relative humidity of 65 ± 50%. Timber structure tests should not be carried out in the open air. Temporary facilities to shield against wind and rain should also be set up when conducting inspection tests on timber structures on site. 2.4 Test records and reports
2.4.1 The test records of timber structures should comply with the following provisions: 1 Detailed records (including test date, location, name of tester, etc.) should be made for any test and no alterations should be made. According to the different conditions of the measurement content and the instruments used, various forms of special record forms can be used. 2 The defects of the specimens (wood knots, diagonal lines, cracks, etc.) should be marked on the record paper before the test, and their positions and sizes should be indicated (Figure 2.4.1). D
Figure 2.4.1 Wood knot record
3 The damage of the specimens should be described in detail. The types of damage (shear, tension, compression, bending or diagonal tearing, etc.), the locations of damage, etc., should be marked with symbols on the sketch (including wood defects, etc.). Various signs of damage process Page 12
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《Standard for Test Methods of Timber Structures
Data No.:
50329-2002
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