Fiber reinforced composite material rib and concrete composite beam

Abstract

The invention discloses a fiber reinforced composite material rib and concrete composite beam which comprises fiber reinforced composite material ribs and concrete wrapping the peripheries of the fiber reinforced composite material ribs. The concrete wrapping the peripheries of the fiber reinforced composite material ribs in a composite beam stress area is an engineering cement-based composite. According to the composite beam, the reinforcing steel bar consumption is lowered, and the structural durability is high.

Description

technical field [0001] The invention belongs to the technical field of building components, in particular to a fiber-reinforced composite reinforced concrete composite beam. Background technique [0002] The durability of reinforced concrete structures has always been an important research topic in the field of civil engineering. The problem of steel bar corrosion in reinforced concrete structures is very prominent. Many buildings and bridges are destroyed in advance due to steel bar corrosion, resulting in huge economic losses. [0003] Fiber Reinforced Polymer Tendon (FRP tendon for short) has good corrosion resistance and material mechanical properties. The corrosion problem of reinforced concrete has promoted the research on FRP bars and FRP bar concrete structures. In recent years, the research on FRP bars and their applications has been very active in the world. A lot of research has been carried out, and a series of corresponding technical regulations have been form...

AI Technical Summary

Problems solved by technology

More importantly, due to the lower elastic modulus of FRP tendons, compared with reinforced concrete beams configured with the same tensile longitudinal reinforcement area, FRP tendon beams exhibit larger deflection and wider crack width, so the members in normal use The performance requirements under the limit state often become the design control factor, and the strength of FRP bars cannot be fully exerted, which limits the popularization and application of FRP bar concrete structures

[0005] For ordinary concrete flexural beams, the cracking of the concrete in the tension zone accelerates the corrosion of the steel bars, which in turn causes further cracking and spalling of the concrete cover

[0006] Therefore, the problems existing in the prior art are: due to the large deflection deformation and large crack width of the fiber reinforced composite reinforced concrete, the fiber reinforced composite reinforced concrete beams are prone to brittle failure, poor ductility, weak structural durability, and large amount of steel bars

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