Static and dynamic performances of concrete-filled braided cfrp tubular protective structures

Abstract

In this research, concrete-filled braided carbon fibre-reinforced polymer (CFRP) tubular beams and arches were constructed. CFRP tubes and concrete-filled CFRP tubular cylinders were compressed to investigate the constraint effect of the CFRP tube on the concrete. Long and short beams were bent to reveal the deformation styles and the failure modes controlled the flexure and the shear, respectively. All of these experiments on cylinders and beams supply basic data to judge the failure load of the concrete-filled tubular arch. Blast resistance of the concrete-filled tubular arch was investigated by explosion experiments and evaluated by the residual static load-carrying capacity of the exploded arches. Constrained by the CFRP tube, the protective arch has excellent blast resistance. A hybrid compression-bending failure criterion was proposed to estimate the static structural performance, and the prediction is consistent with the experiment.