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Journal of Wood Science

, Volume 64, Issue 5, pp 526–537 | Cite as

A determination method of compressive design value of dimensional lumber

  • Yong ZhongEmail author
  • Guofang Wu
  • Haiqing Ren
  • Zehui Jiang
Original Article
  • 81 Downloads

Abstract

The objective of this study was to develop a determination method of compressive design value of dimensional lumber for its safety design and rational application as a green building material. A total of 1049 full-size 2 × 4 samples of Chinese larch (Larix gmelinii) dimensional lumber, including visual grades Ic, IIc, IIIc, and IVc, were tested by static compressive tests. Compression strength parallel to grain (UCS) of different grades were summarized. By the least square method, the fitted parameters and results for UCS were obtained under different probability distribution models (normal, lognormal and 2-P-Weibull) and test data points (100, 75, 50, 25, and 15%). Based on reliability analysis method, relationships between the reliability index and partial factor were investigated under different probability distribution models, fitting data points, load combinations and load ratios. Finally, this study suggested that the lognormal distribution, 25% data points, load combination of dead load plus residential live load, and load ratio of 1.0 be selected for the determination of compressive design value of Chinese larch dimensional lumber. For Chinese larch dimensional lumber, the compressive design values of grade Ic, IIc, IIIc and IVc were 22.9, 18.3, 14.6 and 13.8 MPa, respectively.

Keywords

Compressive design value Dimensional lumber Full size Reliability analysis 

Notes

Acknowledgements

This project was financially supported by the National Key Technology Support Programs (2017YFC0703501 and 2015BAD14B0502). We are also honored to thank the Processing and Utilization Technology of High Strength Structural Materials team for providing technical support.

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Copyright information

© The Japan Wood Research Society 2018

Authors and Affiliations

  1. 1.Research Institute of Forestry New TechnologyChinese Academy of ForestryBeijingChina
  2. 2.Research Institute of Wood IndustryChinese Academy of ForestryBeijingChina
  3. 3.International center for bamboo and rattanBeijingChina

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