Open Access

ARTICLE

Theoretical Analysis on Deflection and Bearing Capacity of Prestressed Bamboo-Steel Composite Beams

Qifeng Shan^1,2, Ming Mao², Yushun Li^3,*

1 School of Civil Engineering, Zhejiang Industry Polytechnic College, Shaoxing, 312000, China
2 School of Civil & Environmental Engineering and Geography Science, Ningbo University, Ningbo, 315211, China
3 College of Civil Engineering and Architecture, Qingdao Agricultural University, Qingdao, 266109, China

* Corresponding Author: Yushun Li. Email:

Journal of Renewable Materials 2024, 12(1), 149-166. https://doi.org/10.32604/jrm.2023.029445

Received 19 February 2023; Accepted 16 March 2023; Issue published 23 January 2024

Abstract

A theoretical analysis of upward deflection and midspan deflection of prestressed bamboo-steel composite beams is presented in this study. The deflection analysis considers the influences of interface slippage and shear deformation. Furthermore, the calculation model for flexural capacity is proposed considering the two stages of loading. The theoretical results are verified with 8 specimens considering different prestressed load levels, load schemes, and prestress schemes. The results indicate that the proposed theoretical analysis provides a feasible prediction of the deflection and bearing capacity of bamboo-steel composite beams. For deflection analysis, the method considering the slippage and shear deformation provides better accuracy. The theoretical method for bearing capacity matches well with the test results, and the relative errors in the serviceability limit state and ultimate limit state are 4.95% and 5.85%, respectively, which meet the accuracy requirements of the engineered application.

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Keywords

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