Abstract
In this study, the tensile mechanical properties of bolted laminated bamboo lumber (LBL) loaded parallel to the grain were investigated under the influence of end distance and bolt spacing according to ASTM D5652-95. A total of 32 specimens were tested and the bearing capacity was calculated based on the 5% D offset method. The test results showed that: end distance and bolt spacing both regularly affected the initial stiffness and bearing capacity of the specimens, while there was no significant effect on the yield stiffness; with the enlargement of end distance and bolt spacing, the ductility ratio gradually increased and tended to stabilize, and the failure mode shifted from brittle failure to ductile failure, resulting in the recommended minimum size requirements for bolted LBL as follows: 8 times the bolt diameter for the end distance and 7 times the bolt diameter for the bolt spacing. The bolted connection bearing capacity of different materials as well as that obtained by different calculation methods were compared with the experimental results, allowing the empirical equations for predicting the yield load of bolted LBL to be put forward.
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Data availability
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgments
The writers gratefully acknowledge Chen Chen, Bingyu Jan, Tingting Ling, Dong Yang, Wenjing Zhou and others from the Nanjing Forestry University for helping with the tests.
Funding
This work was supported by the National Natural Science Foundation of China (No. 51878354 & 51308301), the Natural Science Foundation of Jiangsu Province (No. BK20181402 & BK20130978), 333 talent high-level projects of Jiang-su Province, and Qinglan Project Fund of Jiangsu Higher Education Institutions. Any research results expressed in this paper are those of the writer(s) and do not necessarily reflect the views of the foundations.
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All authors contributed to the study conception and design. YC: Investigation, Formal analysis, Writing—original draft. HL: Conceptualization, Funding acquisition, Supervision, Investigation, Formal analysis, Writing—original draft. GC: Supervision, Investigation, Writing—review & editing. ZX: Supervision, Investigation. OC: Supervision, Writing—review & editing.
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Chen, Y., Li, H., Cheng, G. et al. Parallel-to-grain tensile mechanical behavior of laminated bamboo lumber for bolted connections. Cellulose 30, 9775–9791 (2023). https://doi.org/10.1007/s10570-023-05480-6
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DOI: https://doi.org/10.1007/s10570-023-05480-6