Full FRP (Fiber Reinforced Plastics) bar reinforced ECC-concrete combined beam component and preparation method thereof

Abstract

The invention provides a full FRP (Fiber Reinforced Plastics) bar reinforced ECC-concrete combined beam component and a preparation method thereof. FRP bars, high ductility cementitious composite materials ECC and concrete are combined. The full FRP bar reinforced ECC-concrete combined beam component comprises an ECC layer on the lower part, a concrete layer on the upper part and an FRP bar framework, wherein the FRP bar framework is formed by a longitudinal tensile FRP bar, an FRP bar hoop, an FRP bar web bar and a longitudinal erection FRP bar; the longitudinal tensile FRP bar is placed on the bottom part of the beam component and is located on the inner side of the FRP bar hoop; the FRP bar erection bar is placed on the top part of the beam component and is located on the inner side of the FRP bar hoop; the FRB bar web bar is placed in the middle of the beam component and is attached to the inner side of the FRP bar hoop; the longitudinal tensile FRP bar, the FRP bar erection bar and the FRP bar web bar are respectively bound with the FRP bar hoop. The full FRP bar reinforced ECC-concrete combined beam component provided by the invention has the advantages of good ductility, high energy-dissipating capacity, good durability, light weight and the like, and can be applied to beam components in buildings, bridges and port structures.

Description

technical field [0001] The invention belongs to the fields of buildings, bridges and port engineering, and in particular relates to an all-FRP reinforcement reinforced ECC-concrete composite beam member. Background technique [0002] At present, the durability of reinforced concrete structural members is a worldwide concern in the field of civil engineering. Among them, steel corrosion is one of the most important factors affecting the durability of structural members. Corrosion of steel bars can easily cause premature damage and performance degradation of structural components, reduce the bearing capacity of structural components, and in severe cases, affect the safety and service life of structural components, bringing huge losses to people's lives and property. [0003] FRP bars are composite bars formed with fibers or fiber fabrics as reinforcements and resin as a matrix. Compared with steel bars, FRP bars have the advantages of high tensile strength, good durability, ...

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the reinforced concrete structure with FRP bars, mainly in: (1) When the elastic and brittle FRP bars are combined with brittle concrete materials, they show poor ductility

(2) The elastic modulus of FRP bars is low, and the concrete members equipped with FRP bars are prone to excessive deformation and excessive crack width, which seriously affects their normal performance

Excessive cracking cracks expose FRP bars to harsh environments, causing new durability issues

(3) The deformation coordination ability between FRP bars and concrete is poor. After the concrete cracks, it is easy to cause interface bonding failure, cause cracks along the bars, further aggravate the spalling of surface concrete, and even cause the fracture of FRP bars.

Images