GB/T 31291-2014Standard for evaluation of duration of load and creep effects of wood and wood-based products (English PDF)
木材和木基产品的荷载持续时间效应和蠕变性能评定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 5, 2014
Implementation date
March 11, 2015
Scope
GB/T 31291-2014 is the English-translated version of 木材和木基产品的荷载持续时间效应和蠕变性能评定.
GB/T 31291-2014 is the Chinese standard "Standard for evaluation of duration of load and creep effects of wood and wood-based products". Its scope clause reads: This standard specifies the test methods and evaluation of wood and wood-based products load duration effect and creep properties.
This standard applies to the assessment of sawn timber, structural composite lumber and structural wood-based panel products such as load duration effect and creep properties. this Standard is not used to evaluate the performance impact under load products, or for the duration of the effect of the product load and creep influence coefficient system Number quantify. Its clauses include terms and definitions.
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Document preview — GB/T 31291-2014
National Standard of the People's Republic of China
- ICS
- 91.080.20
- Classification
- B 60
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 3.1 Sample width breadth
- 3.2 Sample height depth
- 3.3 Span
- 3.4 Creep
- 3.5 Initial deflection
1 Scope
This standard specifies the test methods and evaluation of wood and wood-based products load duration effect and creep properties.
This standard applies to the assessment of sawn timber, structural composite lumber and structural wood-based panel products such as load duration effect and creep properties. this
Standard is not used to evaluate the performance impact under load products, or for the duration of the effect of the product load and creep influence coefficient system
Number quantify.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 1931 Method for determination of moisture content of wood
GB/T 50329 standard test methods for wood structures
ISO 16572 wooden structure detection method based panel structural features (Timberstructures-Wood-basedpanels-Test methodsforstructuralproperties)
3 Terms and Definitions
GB/T 1931 and GB/T 50329 and defined by the following terms and definitions apply to this document.
3.1 Sample width breadth
Vertical and perpendicular to the sample size to span the bending direction of the load applied.
3.2 Sample height depth
Perpendicular and parallel to the sample size to span the bending direction of the load applied. (See FIG. 1, t Representative sample height)
3.3 Span
Supported by two points curved horizontal distance between the specimen. (See FIG. 1, l is the span)
3.4 Creep
Test material under constant load increases with time deformation.
3.5 Initial deflection
Deflection of the sample after the applied load instantly generated, this standard takes 1min generated when the deflection.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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