I. Basic Provisions
Buildings should be divided into four seismic defenses according to the importance of their use function: Category A, B, C, D. The seismic defenses of Category A, B, C, and D should be divided into four seismic defenses according to the importance of their use function.
Category A buildings should belong to major construction projects and earthquake may occur serious disaster buildings, category B buildings should belong to the earthquake function can not be interrupted or need to be restored as soon as possible, category C buildings should belong to buildings other than A, B, D buildings, category D buildings should belong to the seismic secondary buildings.
Category A buildings will have a great social impact or cause great economic losses after earthquake damage. Serious secondary disaster means flood, fire, explosion, massive leakage of highly toxic or strongly corrosive substances and other serious secondary disasters that may be triggered after earthquake damage.
Category B buildings belong to the earthquake damage will have a large social impact or cause considerable economic losses, including the city's important lifeline projects and crowded multi-storey large public **** building.
Category D buildings, the earthquake damage does not affect the A, B, C buildings, and the social impact and economic loss is slight. Generally low value for the storage of goods, personnel activities, no secondary disasters, such as single-story warehouses.
Second, earthquake-resistant and disaster-proof buildings
①The seismic protection category of medical buildings should be in line with the following provisions:
Three-level hospitals, inpatient departments, medical buildings, outpatient clinics, the seismic protection category should be divided into Category A.
The inpatient department, medical technology building and outpatient department of the tertiary hospitals in large and medium-sized cities, the inpatient department, medical technology building and outpatient department of the secondary hospitals in counties and county-level cities, the inpatient department and medical technology building of the main hospitals in the townships with the seismic intensity of 8 or 9 degrees, the important buildings of the command, communication and transportation systems of the emergency centers at or above the county level, and the buildings of the independent blood-collecting and supplying institutions at or above the county level, the seismic-resistant design category shall be classified into Category B.
The seismic protection category shall be classified as Category B.
Medical buildings of industrial and mining enterprises can be compared to the city's medical buildings to determine their seismic fortification category.
The level of hospitals, three hospitals means that the total number of beds in the hospital is not less than 500 and the floor area of each bed is not less than 60 m2, the second level of hospitals means that the number of beds is not less than 100 and the floor area of each bed is not less than 45 m2. three-level hospitals for the few third-level hospitals to undertake particularly important medical tasks.
② fire garage and its duty room, seismic defense category should be divided into Category B.
3 large and medium-sized cities and seismic intensity of 8, 9 degrees above the county-level earthquake disaster command center of the main building, seismic design category should be divided into Category B.
Industrial and mining enterprises of the earthquake and disaster prevention command system building, can be compared to the city earthquake and disaster prevention command system building to determine its seismic fortification category.
When a building has the function of a disaster prevention command center only in a certain section, the section can be classified as Category B.
④The seismic fortification category of a building of a disease prevention and control center shall be in accordance with the following provisions:
The seismic fortification category of a building of a disease prevention and control center that undertakes the tasks of research, pilot test and storage of highly toxic and high-risk infectious disease viruses, or its section, shall be classified as Category A.
The main buildings of disease prevention and control centers in counties and county-level cities or above shall be classified as Category B for their seismic fortification category, except for those stipulated in the preceding paragraph.
Three, public **** buildings and residential buildings
Category A: scientific experimental buildings, research, pilot production and storage of highly toxic biological products, natural and artificial bacteria, viruses (such as plague, cholera, typhoid fever and new high-risk infectious diseases, etc.) of the building.
Category B: ① sports buildings, the use of the requirements for the special class, class A and the scale classification for the extra-large, large stadiums and gymnasiums.
On the use of requirements and scale grading, the special class refers to the main stadium to host the Asian Games, the Olympic Games level World Championships; Grade A refers to the venue to host national and single international competitions; large stadiums refers to the spectator seating capacity of not less than 40,000 people, and large gymnasiums (including swimming pools) refers to the spectator seating capacity of not less than 6,000 people. The venues shall simultaneously meet the requirements of use level and scale.
② theater buildings, large movie theaters, theaters, entertainment center buildings.
Which, large theaters, movie theaters, refers to a seat of not less than 1200; large entertainment centers refers to a section of the upper and lower floors combined seating is significantly greater than 1200 at the same time at least one of the seats in the 500 or more (equivalent to the seating capacity of a medium-sized movie theaters) of the hall.
3 commercial buildings, large crowded multi-story shopping mall. When the commercial building and other buildings should be judged separately, and by section to determine its seismic protection category.
Large shopping malls refers to a section of the building area of 25000m2 or business area of 10000m2 or more commercial buildings, if the average per customer 1.35 m2 calculation, the flow of people up to 7500 people or more. This type of commercial buildings generally need to meet the same time, intensive, building area or business area in line with the large-scale provisions, multi-storey buildings and other conditions; all warehousing, single-storey shopping malls are not included.
When the commercial building and other buildings, including commercial and residential buildings or complexes, the division of zones determined by the principle of mutatis mutandis. For example, high-rise buildings in the multi-storey commercial podium section or the lower part of the commercial section for category B, while the upper part of the residential can be category C. It should also be noted that, when divided by section, if the upper section is category B, then its lower section should also be category B.
For the intensive securities trading hall, can be determined by the principle of comparable seismic protection category.
4 museums and archives, large museums, museums storing national-level cultural relics, special, Class A archives.
Which, large museums refers to building size greater than 10000m2, generally used in the central ministries and commissions directly under the museum and the provinces, autonomous regions and municipalities directly under the Central Government Museum. Special archives for the national archives, Class A archives for the provinces, autonomous regions, municipalities directly under the Central Government Archives, the two durability requirements in more than 100 years.
⑤ Exhibition buildings, large exhibition halls, convention and exhibition centers.
In the above exhibition halls, convention and exhibition centers, in a section of the design of the number of people generally more than 5,000. Science and technology museum can be compared to the exhibition hall to determine its seismic protection category.
6 education buildings, the number of kindergartens, elementary school, low-level teaching buildings. This type of housing using better seismic performance of the structure type, can still be in accordance with the requirements of the seismic intensity of the region to take anti-seismic measures.
The low-rise building refers to masonry houses with no more than three floors. A kindergarten with a large number of people means a single building with more than 200 young children; an elementary school with a large number of people means a single building with more than 600 schoolchildren. If the use of seismic performance of the concrete structure materials and reasonable structural type, seismic measures can still be used in accordance with the original intensity of defense.
For homes for the elderly, welfare homes, schools for the disabled and other earthquake self-help ability of the weaker groups of people use masonry houses, can be compared to the above kindergarten to correspondingly increase the seismic category.
7 high-rise buildings, when the number of regular users in the structural unit more than 10,000 people, the seismic defense category should be divided into Category B.
This kind of building according to the per capita area of 10m2 estimation, the building area is roughly more than 100000m2, in a structural unit to concentrate so many people belong to the high-rise building, its seismic measures generally need to be specially studied, that is, the degree of improvement is to improve one degree according to the overall increase in the overall increase in one degree, to improve the seismic grade or in the key parts of the building than the C category more stringent measures can be taken after a special study and The argumentation to determine.
Category C: houses, dormitories and apartments.
Four, warehouse buildings
Warehouse buildings, storage of radioactive substances and highly toxic, flammable, explosive substances and other hazardous materials with fire hazardous warehouse should be divided into Category B buildings; general storage of low value, low personnel activities, no secondary disaster of the single-story warehouses can be divided into Category D buildings.
In addition to the above category B buildings, warehouses do not all belong to category D buildings, according to the nature of the stored goods and the degree of impact to determine by the industry in the industry standards to be provided.
Fifth, explain
①This paper is based on the "seismic protection of building construction classification standards" GB50223-2004 development;
② Determine the seismic protection of the building category, you can refer to this article, if the design of the building according to Category B or A, there should be the approval of the relevant competent authorities.