Numerical Analysis of Push-out Specimens of Bamboo Scrimber-concrete Composite Structural Connectors

Zhengkun Xiang

doi:10.54097/01dwc720

Authors

Zhengkun Xiang

DOI:

https://doi.org/10.54097/01dwc720

Keywords:

Bamboo Scrimber-concrete Composite Structures; Numerical Analysis; Notch-bolt joints; Push-out tests; Shear capacity; Load-slip Curves.

Abstract

As a kind of hot-pressed bamboo high-strength green biomass engineering material, the research and use of bamboo scrimber is in line with the mainstream development of civil engineering field. In order to investigate the damage pattern and force performance of bamboo scrimber-concrete composite structure and find the suitable shear connector type, this paper simulates and analyzes the force situation of the launched specimens of bamboo scrimber-concrete composite structure under three different connection modes of bolt connector, slot-bolt connector and notch-bolt connector with ABAQUS finite element software combined with the experimental situation, so as to determine the reasonable shear connector type; and further clarifies the use of connectors with comparative study of the force parameters of connectors. Comparative study of the force parameters of the connectors further clarifies the use of the connectors. The results show that: the use of notch-bolt type shear connectors is optimal, the damage mode of the bamboo scrimber-concrete composite structure is the crushing damage of concrete at the notch, and the force pattern is obvious during the loading process; the magnitude of notch-bolt connectors on the shear capacity and shear stiffness of the composite structure decreases with the increase of the embedding depth of the screw, and increases with the increase of the length of the notch, the diameter of the bolt, the length of the screw and the number of the bolts.

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