EXPERIMENTAL RESEARCH ON SHEAR RESISTANCE OF STEEL PLATE CONNECTORS FOR BAMBOO-CONCRETE COMPOSITE STRUCTURES

To investigate the mechanical properties of the perforated plate shear connections for bamboo-concrete composite structures, the push-out tests on the perforated plate connectors were conducted. The results showed that the typical failure modes of perforated plate shear connections of bamboo-concrete composite structures were the yield of the perforated plate, partial shearing crushing of the concrete, and the slipping of the perforated plate in the bamboo section. The yield of the perforated plate occurred mostly at the perforated plate shear connections of bamboo-concrete. The load-slip curves of perforated plate shear connections of bamboo-concrete structures maintained a high residual load value after reaching the peak load, and the load dropped slowly. The failure modes were ductile no matter whether setting perforated steel bar of not, and its interface slipped evenly along the height of the interface. The bearing capacity of perforated plate shear connections of bamboo-concrete structures were determined by three factors, which were the bearing capacity of the interface between the perforated plate and bamboo, the bearing capacity of the interface between the perforated plate and concrete, and the shear resistance of the weakest section of the perforated plate at the interface. Based on the test results, the analysis method of the bearing capacity was proposed for the perforated plate shear connections of bamboo-concrete structures.