Loyalty FRP composite material, widely used

The application of FRP composites in civil engineering is growing rapidly, and can be used for aseismatic and reinforcement of columns, walls, beams, plates and panels. New reinforced components, structural forms and structural systems are also being researched, developed and applied.

1. Construction Engineering

The structural design is turning to the performance based design, and the requirements for the structure and material performance are also improved. The FRP material has been used in the construction of the new structure to improve its structure and performance, and is also widely used in the maintenance and reinforcement of the old civil buildings.

2. Geotechnical engineering

FRP fiber has good corrosion resistance of the composite materials in the long-term bad geological conditions, has been widely used in reinforced soil; FRP composite is the tunneling machine cut off, so that it can be used for concrete walls, soil nailing and temporary support for the composite anchor shield tunneling shaft, such as steel anchor will the cause of fracture of excavator head. Because GFRP composite material is cheap, easy to install and durable, it has been used for dry and wet retaining walls with tidal changes, foundation bolts and shotcrete tendons.

3. Bridge Engineering

The application of FRP composites to bridge engineering began in the late 70s and early in the early 80s. It can be used as a prestressed tendon in cables and prestressed concrete bridges of suspension bridges and cable-stayed bridges, and even for the whole bridge system. Besides, it can also be applied to bridge reinforcement and reinforcement.

4. Marine structure and offshore structure

The corrosion problem of offshore structure and offshore structure has been outstanding. For steel structure, the FRP with good corrosion resistance can solve this problem well, and has a good development prospect. Marine reinforced concrete structure in the construction, the concrete protective layer thickness (usually around 150mm, equivalent to 5 times the land protection of concrete structure layer above) and anticorrosion measures of internal reinforced anti chloride corrosion is only 15 years or so, and the marine structure durable permanent or semi permanent request far. Adopting FRP concrete or FRP- concrete composite structure can fundamentally solve the corrosion problem of steel bar (steel) in marine engineering, and its significance is self-evident.