by Precast building is a building assembled by precast parts on the construction site, which is called precast building.
According to the form and construction method of precast components, it is divided into five types: block building, plate building, box building, skeleton plate building and rising plate and rising floor building.
The precast building adopts the construction method of producing and prefabricating building components including beams, plates, columns and external walls in the factory, and transporting them to the site for installation and construction after maintenance and acceptance.
Precast buildings are divided into precast steel structure buildings and precast reinforced concrete buildings from building materials; Precast buildings are divided into precast industrial buildings and precast civil buildings from the use function.
Precast civil buildings are also divided into precast public buildings and precast residential buildings.
Precast structure precast concrete structure is the abbreviation of precast concrete structure.
It is a concrete structure composed of precast components as the main stressed components through assembly / connection.
Compared with the cast-in-situ construction method, the precast construction can better meet the requirements of land saving, energy saving, material saving, water saving and environmental protection of green construction, reduce the negative impact on the environment, including reducing noise, preventing dust, reducing environmental pollution, clean transportation, reducing site interference, saving water, electricity, materials and other resources and energy, and follow the principle of sustainable development.
Fabricated steel structure cast building with steel structure: the structural system of a building is a cast building composed of steel (members).
Basic concept of PC precast component: concrete precast component, English: precastconcrete, so it is also called PC component, which refers to the concrete products processed and produced in the factory through standard industrialization.
Such as precast reinforced concrete column foundation, precast steel structure steel column foundation, street lamp billboard column reinforced concrete foundation and precast floor slab.
Assembly rate (also known as PC rate) within the scope of single building, the ratio of concrete volume of precast components to all concrete volume used is called assembly rate.
It is usually calculated according to the part above plus or minus zero, and the state has no unified and clear regulations for the time being.
The assembly rate index reflects the degree of industrialization of buildings.
The higher the assembly rate, the higher the degree of industrialization.
The ratio of the area of single building with assembly rate meeting the requirements of assembly rate to the total area of the project.
There are no unified and clear provisions in the state, which are generally controlled by local governments or competent construction departments in the process of land transfer and project construction.
The assembled integral concrete structure is an integral structure formed by precast concrete members or components connected by reinforcement, connectors or prestressing and cast-in-situ concrete.
According to the current mature design and construction methods in the industry, the horizontal members are laminated members and the vertical members are cast-in-situ.
The structural system is regarded as an integral structural system, which can meet the seismic requirements.
Superimposed concrete flexural member is an integral flexural member formed by pouring upper concrete on precast concrete members.
It is divided into laminated concrete slab and laminated concrete beam.
The precast insulation wall is a sandwich wall composed of insulation layer, inner and outer concrete wall panels and FRP connectors.
The wall is cast and produced in the precast component factory, and then transported to the construction site for installation and use.
Fiber reinforced plastic (FRP) connectors are used to connect the inner and outer concrete wallboards of precast insulation walls and transfer the shear force of wallboards to form an integral connector.
The connector material is fiber reinforced composite plastic-.
