Experimental study of bond behavior of laminated bamboo plate to concrete interfaces

Abstract

This research experimentally studied the bond behavior of laminated bamboo (LB) plate to concrete interface. Totally forty-five single shear pull-out specimens, which were categorized in nine groups, were prepared and tested to determine the bond characteristics. Plate thicknesses, plate widths and bond lengths were the three major parameters considered in the specimen preparations. It was found that debonding in concrete near the concrete-adhesive interface often occurred in the specimens with bond length less than 150 mm, and a mixed failure mode of debonding at the bamboo plate-adhesive interface and debonding in concrete was observed in most specimens with bond length equal to and over 150 mm. The coefficient of variation of the LB-concrete bond specimens was lower than such value of similar FRP-concrete bond specimens. This confirmed that the interfaces of LB plate to concrete can exhibit sufficient reliability for engineering applications. The models for predicting peak load, effective bond length and bond stress–slip curve, originally used for FRP bonded concrete specimens, were calibrated for LB bonded concrete specimens based on the test results. Compared with other models, the models proposed by Teng et al. and Zhou were more accurate for the prediction of the peak load and effective bond length of the LB bonded concrete specimens. Classical power function model with a linear descending branch was able to effectively describe the nonlinear bond stress–slip curves and achieved good agreement with test results.

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Acknowledgements

This research was supported financially by the National Natural Science Foundation of China (Grant No. 52008249) and the National Key R&D Program (Grant No. 2017YFC0702900). The authors gratefully acknowledge the support.

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Correspondence to Qingfeng Xu.

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Zhang, F., Wan, B., Xu, Q. et al. Experimental study of bond behavior of laminated bamboo plate to concrete interfaces. Mater Struct 54, 25 (2021). https://doi.org/10.1617/s11527-021-01616-x

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Keywords

  • Laminated bamboo plate
  • Concrete
  • Single shear pull-out test
  • Bond behavior
  • Bond stress–slip model