FRP strip-shaped spiral stirrup and preparation method thereof

The invention discloses an FRP strip-shaped spiral stirrup and a preparation method thereof, and belongs to the field of building materials and fiber-reinforced composite materials. The FRP strip-shaped spiral stirrup comprises a stirrup body, the section shape of the stirrup body is in a rectangle shape, the width of the stirrup body is far greater than the thickness of the stirrup body, and thespatial shape of the stirrup body is a three-dimensional spiral line. The preparation method of the FRP strip-shaped spiral stirrup comprises the following steps that FRP unidirectional prepreg stripswith a specific number of layers and length are overlapped, wound from one end to the other end on a mold with the three-dimensional spiral line as a path, then solidified and demoulded. The FRP strip spiral stirrup prepared by the preparation method has the advantages of being small in bending secondary stress, less in fiber kink, high in tensile strength, high in production efficiency and low in production cost and the