FRP (fiber reinforced plastic)-steel bone reinforced composite column structure

Abstract

Disclosed is an FRP (fiber reinforced plastic)-steel bone reinforced composite column structure. The FRP-steel bone reinforced composite column structure is characterized by comprising an FRP layer (1), concrete (2), ribs (2) and a steel bone (4); the ribs (3) and the steel bone (4) are in the axial direction of the composite column structure and are coated with the concrete (2), the steel bone (4) is located in the center of the section, the ribs (3) are uniformly distributed along the inner side of the edge of the section, and the FRP layer (1) wraps the concrete (2) from the periphery. By the arrangement, shortcomings existing in the publicly known steel bone concrete structure and concrete-filled steel tube structure are overcome, the internal steel bone is bound more effectively by FRP layer constrained concrete, sufficient bearing capacity storage and stretchability of the structure are achieved, requirement on constructive scaffolds and formwork is reduced, the structure is convenient in construction and low in cost, good comprehensive benefits of the structure are realized, and the composite column structure is applicable to members of columns, piers and the like in the field of civil engineering.

Description

technical field [0001] The invention relates to an FRP-steel reinforcement composite column structure, which can be widely used in the technical field of civil engineering structures. Background technique [0002] In the traditional steel-concrete composite structure, two materials with different properties complement each other and have a series of advantages. Common steel-concrete composite columns in engineering include steel reinforced concrete (SRC for short) columns and concrete filled steel tube (CFT for short) columns. Steel-reinforced concrete structure refers to a structure in which steel frames and steel bars are arranged in concrete. The outsourcing of concrete can prevent local and overall buckling of steel members and increase the durability and fire resistance of the structure. However, the reinforcement structure of steel-reinforced concrete members is relatively complicated. , and formwork is required during pouring, especially under rare earthquakes, the e...

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Problems solved by technology

Another example is Chinese Patent No. "200910248425.3", which discloses a "circular section steel-concrete-FRP solid composite column". The outer layer of the structure is a steel pipe, and the inner layer is an FRP pipe. With concrete, the structure has poor corrosion resistance and fire resistance, and it is difficult to give full play to the good tensile properties of FRP

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