Study on Shear Resistance of GFRP Connectors for Precast Concrete Sandwich Insulation Wall Panels
Fiber-reinforced material connectors are being used for sandwich insulation wall panels to prevent the occurrence of the "thermal bridge effect" between connectors and concrete. However, the shear resistance of fiber-reinforced material connectors is inferior to that of metal connectors. It is necessary to conduct a study on the shear performance of sandwich insulation wall panels using fiber-reinforced material connectors. In this paper, the finite element software ABAQUS is used to construct the appropriate constitutive models of concrete and connectors, and the numerical models of four different types of joints are established. The validity of the proposed models was confirmed by comparing them with experimental results. Subsequently, the influence of concrete grade, number of connectors, and the connector arrangement on the shear bearing capacity of sandwich insulation wall panels was investigated. The research findings indicate that increasing the concrete grade can enhance the bearing capacity of some sandwich insulation wall panels during the failure stage, but the improvement is limited. The bearing capacity of the sandwich insulation wall panels of the horizontally arranged connectors is slightly higher than that of the vertically arranged connectors. To enhance the shear resistance of sandwich insulation wall panels with rod-shaped or similar connectors, increasing the number of connectors is the most straightforward approach.
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维普
