Lightweight fabricated reinforced box-groove-shaped fiber reinforced polymer (FRP) profile and sea sand concrete beam

Abstract

The invention discloses a lightweight fabricated reinforced box-groove-shaped fiber reinforced polymer (FRP) profile and sea sand concrete beam. The fabricated beam is jointly composed of a middle FRPhollow box-groove section beam section and a pre-poured concrete filled beam section at both ends. The middle FRP hollow box-groove section beam section comprises a lower FRP box chamber and an upperFRP groove, a box-groove partition plate between the lower hollow box chamber and the upper groove adopts an FRP corrugated plate, and corrugations on the plate are used as shear-resisting connectingkeys between an FRP and the concrete. According to the lightweight fabricated reinforced box-groove-shaped FRP profile and sea sand concrete beam, the beam weight is decreased through the two aspectsof materials and structure, transportation is convenient, fast and reliable connection can be achieved with the plate and the column, construction is convenient and fast, good adaptability to severeengineering environments with severe corrosion such as coastal ports is achieved, and the good social and economic benefits and engineering application prospects are achieved.

Description

technical field [0001] The invention relates to the field of engineering construction under severe corrosive environments such as general environments and coasts and ports, and specifically refers to a light-weight assembled stiffened box-groove FRP profile sea-sand concrete beam. Background technique [0002] As the most widely used structural form today, reinforced concrete is widely used in various construction projects such as houses, bridges, roads, and dams. However, in recent years, the deterioration of structural performance caused by steel bar corrosion has become more and more prominent, which not only causes safety hazards, but also consumes a lot of manpower and financial resources for the repair and reinforcement of corroded reinforced concrete structures. In 2013, CCTV exposed that sea sand was used illegally in many real estate projects in Shenzhen. A large amount of chloride ions in the sea sand caused serious corrosion to steel bars, which caused cracks in f...

AI Technical Summary

Problems solved by technology

However, in recent years, the deterioration of structural performance caused by steel corrosion has become more and more prominent, which not only causes safety hazards, but also consumes a lot of manpower and financial resources for the repair and reinforcement of corroded reinforced concrete structures.

In 2013, CCTV exposed that sea sand was used illegally in many real estate projects in Shenzhen. A large amount of chloride ions in sea sand caused serious corrosion to steel bars, which led to cracks in floors and walls, and a large number of cracks appeared, causing serious safety hazards.

However, the pure FRP structure also has the disadvantages of large initial investment, low stiffness and low strength utilization rate, so there is an urgent need for an optimal combination of FRP materials and concrete materials to make full use of the tensile properties of FRP materials and the compression resistance of concrete materials. A new structure of performance to meet the demand

Images