In recent years, the four design institutes have been widely recognized in the residential structure design, and have accumulated a certain amount of experience in the assembly design market.

Maximum applicable height of precast integrated structure house (m) common thermal insulation forms and characteristics PC special design contents and key points in each stage scheme stage: PC special design in the scheme stage mainly includes the following contents: (1) determine the area proportion and prefabrication rate of precast buildings according to local policies and owner requirements; (2) select precast structure system (3) determine the type and floor range of precast components.

The specification lists two calculation methods: calculation method 1: prefabrication rate = volume of precast concrete components / (volume of precast concrete components + volume of cast-in-situ concrete) calculation method 2: prefabrication rate = ∑ (component weight) × correction factor × Precast components (proportion) × Pay attention to the following points when calculating 100%: 1 The calculation range in Shanghai is above the outdoor floor, and each single building is taken as the calculation unit.

The characteristics of various thermal insulation forms and materials should be considered in the design.

According to the provisions of the existing specifications, the assembled integral houses with different structural systems have the maximum applicable height limit.

3.

The representative processes, advantages and disadvantages of each system are shown in the figure below.

One is the building height.

Assembly rate refers to the ratio of the quantity (or area) of precast components and building parts to the total quantity (or area) of similar components or parts in precast buildings.

However, there are differences in the scope of components included in the calculation of prefabrication rate (assembly rate) and the conversion proportion of prefabrication rate (assembly rate) of various components.

The precast house with concrete structure can be calculated by two methods.

The common forms of thermal insulation include sandwich thermal insulation, internal thermal insulation and external thermal insulation.

When determining the type of precast components, It should be noted that the reinforced area at the bottom of shear wall structure should not be precast, the transfer beam and frame pillar of frame supported structure should be cast-in-situ, and the elevator shaft of high-rise should be cast-in-situ structure.

Method 1 is only used for concrete structure, and method 2 can be used for concrete structure, steel structure and wood structure.

“Others” refers to the integration of structure and thermal insulation, the integration of wall and window frame, integrated wall, integrated floor and combined reinforced products.

The scope of precast components in Shanghai only includes the main structure and exterior wall enclosure structure.

Non concrete precast components such as curtain wall, stone and gypsum board are not included in the prefabrication rate, and the infilled wall of interior wall is not included in the prefabrication rate.

2.

The common cast structural systems include fully precast shear wall bearing system, precast shear wall exterior wall formwork system, precast double-sided superimposed shear wall system, etc.

Single building assembly rate = single building prefabrication rate + part assembly rate + other part assembly rate = ∑ (part weight) × Proportion of parts) × 100% of which, “part” refers to precast internal partition wall, unit curtain wall, integrated kitchen, integrated toilet, integrated pipe well and integrated smoke exhaust duct.

The second is the form of building thermal insulation.

Source: in case of infringement by Tongji No.4 Design Institute, please contact and delete that “made in China 2025” is the first ten-year action program for the Chinese government to implement the manufacturing power strategy.

Under the background of industrialized construction and a new round of scientific and technological revolution and industrial reform of “made in China 2025”, China’s construction industry has ushered in new changes and significant impact, especially precast housing, which has been widely practiced in various places.

In the selection of precast floors, the cast-in-situ floor structure should be adopted for the basement floor and roof floor of the house; For floors and structural transfer floors with large openings, cast-in-situ floor structure shall be adopted..

Taking the calculation rules of prefabrication rate and assembly rate in Shanghai as an example, prefabrication rate refers to the ratio of the material consumption of precast components in the main structure and enclosure structure of precast buildings of concrete structure, steel structure, steel-concrete mixed structure, wood structure and other structural types to the total material consumption of corresponding components.

Bend Loop

Prefabrication rate and assembly rate at present, in addition to the unified provisions on the assembly rate in the national standard evaluation standard for precast buildings, Shanghai, Jiangsu, Beijing, Chengdu, Shenzhen, Hunan, Hubei and other provinces and cities have also successively issued detailed rules for the calculation of local prefabrication rate and assembly rate.

Precast structural system and characteristics full precast shear wall load-bearing system precast shear wall external wall formwork system precast double-sided superimposed shear wall system there are two main factors restricting the precast structural system.