GB 50223-1995 Classification standard for earthquake-resistant buildings
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Engineering Construction Standards Full-text Information System
National Standard of the People's Republic of China
50223—95
Standard for classification of seismic protection of buildings
Standard for classification of seismic protection of buildings
1995-04-19 Issued
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standards Full-text Information System
1995-11-01 Implementation
Jointly Issued
Engineering Construction Standards Full-text Information System
National Standard of the People's Republic of China
Standard for classification of seismic protection of buildings
Standard for classification of seismic protection of buildings buildings5022395
Editor department: Ministry of Construction of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: November 1, 1995
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Notice on the release of the national standard "Standard for Classification of Building Seismic Fortification"
Jianbiao [1995] No. 204
According to the requirements of the former Ministry of Urban and Rural Construction (88) Chengbiao No. 141 and the Ministry of Construction (91) Jianbiao Ji Zi No. 35, the "Standard for Classification of Building Seismic Fortification" jointly formulated by the Ministry of Construction and relevant departments has been reviewed by relevant departments. The "Standard for Classification of Building Seismic Fortification" GB50223-95 is now approved as a mandatory national standard and will be implemented on November 1, 1995.
This standard is managed by the Ministry of Construction, and its specific interpretation and other work are the responsibility of the China Academy of Building Research. The publication and distribution is organized by the Standard and Norms Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
April 19, 1995
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Basic Provisions
Broadcasting, television and post and telecommunications buildings
Transportation buildings
Energy buildings
Raw materials industrial buildings
Processing and manufacturing industrial buildings
Urban earthquake-resistant and disaster-proof buildings
Civil and other buildings
Warehouse buildings
Appendix A Explanation of terms used in this standard
Additional explanation
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1 General Provisions
1 This standard is formulated to make the earthquake-resistant design of buildings have clear fortification categories, reduce earthquake disasters, and use construction funds reasonably. 1.0.2
2 This standard is applicable to the classification of earthquake fortification categories of buildings in areas with a fortification intensity of 6 to 9 degrees.
3 The earthquake fortification categories of buildings with special requirements and industries not listed in this standard shall be implemented in accordance with the special regulations of the relevant departments. 1.0.4 The industry standards for earthquake fortification categories of buildings in various industries and departments shall comply with the principle requirements and regulations of this standard for earthquake fortification categories of buildings. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
2 Terminology
Classification of earthquake fortification categories Earthquake protection category for buildings
In the earthquake-resistant design of buildings, the fortification categories of buildings are classified according to the economic losses and social impact caused by earthquake damage to the buildings and their role in earthquake relief.
Direct economic lossbzxZ.net
Directeconomic lossduetoearthquake Economic losses caused by the destruction of buildings, equipment and facilities and the reduction of net output value due to suspension of production and business.
2.0.3 Indirect economic lossIndirecteconomiclossduetoearthquake The social output value reduced by the destruction of buildings, equipment and facilities, the cost of repair and insurance compensation, etc.
2.0.4 Social impactSocial effectduetoearthquake Mainly refers to the loss caused by personal injury and death, the decline of living conditions and welfare conditions, and ecological environment pollution caused by the destruction of buildings. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 Basic Provisions
3.0.1 The classification of building earthquake fortification should be determined comprehensively based on the following factors. 3.0.1.1 Social impact and the size of direct and indirect economic losses. 3.0.1.2
The size and status of the city, the characteristics of the industry, and the scale of industrial and mining enterprises. 3.0.1.3
The scope of the impact on the whole after the use function fails. 3.0.1.4
The seismic potential of the structure itself and the difficulty of restoring the use function.
When the importance of each unit of the building is significantly different, the classification can be based on the local unit.
3.0.1.6 The same building in different industries may have different seismic fortification categories due to its position and the consequences and impacts after earthquake damage. 3.0.2 The seismic fortification category of the building should be divided into four categories: Class A, Class B, Class C, and Class D according to the importance of its use function. The classification should meet the following requirements. 3.0.2.1 Class A buildings are buildings that have serious impacts on society after earthquake damage, huge losses to the national economy, or have special requirements. 3.0.2.2 Class B buildings mainly refer to buildings whose use functions cannot be interrupted or need to be restored as soon as possible, and whose earthquake damage will cause major social impacts and major losses to the national economy. 3.0.2.3 Class C buildings, which are generally affected by earthquake damage and other buildings that do not belong to Class A, B, or D.
3.0.2.4 Class D buildings, which are buildings whose damage or collapse by earthquake will not affect Class A, B, or C buildings, and whose social impact and economic losses are minor. Generally, they are single-story warehouses with low-value stored goods and few personnel activities. 3.0.3 The seismic fortification standards of various types of buildings shall meet the following requirements. 3.0.3.1 Class A buildings shall be designed according to the increased fortification intensity (including earthquake action and seismic measures).
3.0.3.2 Class B buildings, earthquake action shall be calculated according to the seismic fortification intensity of the region. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Seismic measures, when the fortification intensity is 6 to 8 degrees, the design shall be increased by one degree, and when it is 9 degrees, the seismic measures shall be strengthened. For smaller Class B buildings, a structural system with good earthquake resistance and economical rationality can be adopted, and earthquake resistance measures can be taken according to the earthquake fortification intensity of the local area. The foundation of Class B buildings does not need to improve earthquake resistance measures. 3.0.3.3 For Class C buildings, earthquake action and earthquake resistance measures should be designed according to the fortification intensity of the local area.
4 For Class D buildings, under normal circumstances, earthquake action may not be reduced. When the fortification intensity is 7 to 9 degrees, earthquake resistance measures can be designed according to the fortification intensity of the local area by one degree reduction. When it is 6 degrees, it may not be reduced.
5 This standard only lists Class A and Class B buildings in some industries and a few Class C buildings. Class D buildings shall be determined according to the provisions of Section 3.0.2.4 of this standard; except for Class A, B and D, those not listed in this standard should be classified as Class C buildings. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4 Radio, Television and Post and Telecommunications Buildings
1This chapter applies to the seismic fortification of radio, television and post and telecommunications buildings. 4.0.2
2 Radio, television and post and telecommunications buildings should be divided into seismic fortification categories based on their position in the entire information network and their role in ensuring the smooth flow of the information network. The seismic fortification level of the supporting power supply and water supply buildings should be the same as the seismic fortification category of the main building. When the power supply and water supply buildings are separate buildings, they can be classified as Class B buildings. 4.0.3
The seismic fortification category of radio and television buildings should comply with the provisions of Table 4.0.3. Seismic fortification categories for radio and television buildings
Table 4.0.3 for central and provincial FM radio transmission tower buildings
Seismic fortification categories for central radio transmission stations, program transmission stations, radio centers, TV centers, provincial radio centers, TV centers, and radio transmission post and telecommunications buildings with a transmission capacity of more than 200kW shall comply with Table 4.0.4. Earthquake fortification categories of postal and telecommunications buildings
International telecommunications buildings, international submarine cable landing stations, international satellite earth stations, central-level telecommunications hubs (including satellite earth stations)
Regional and provincial long-distance telecommunications hubs, postal hubs, submarine cable landing offices, important city telephone offices (tandem offices, offices that undertake important communication tasks and have terminal capacity exceeding 50,000 ports), satellite earth stations, main computer rooms and antenna supports of regional center long-distance telecommunications hub buildings
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Engineering Construction Standards Full Text Information System
Transportation buildings
This chapter applies to the main production buildings of railway, highway, water and air transportation systems 5.0.1
Earthquake fortification.
The production buildings of the transportation system should be divided into earthquake fortification categories according to their status in the transportation lines and their role in disaster relief and production recovery. 5.0.3
The seismic fortification categories of railway system buildings shall comply with the provisions of Table 5.0.3. Seismic fortification categories of railway buildings
Building name
Table 5·0·3
Train dispatching, operation, communication, signal, power supply, water supply buildings of Class I trunk hubs and corresponding industrial and mining enterprise railway hubs, and waiting rooms of super-large stations Seismic fortification categories of highway buildings shall comply with the provisions of Table 5.0.4. Seismic fortification categories of highway buildings
Table 5·0·4
, monitoring rooms of Class I highways, Class I bus stations, etc. Seismic fortification categories of expressways,
water transport buildings shall comply with the provisions of Table 5.0.5. Seismic fortification categories for water transport buildings
Buildings of important facilities such as water transport communications and navigation in cities with a population of more than 500,000, as well as important national passenger stations, and important buildings in departments such as maritime rescue and salvage The seismic fortification categories for air transport buildings,
should comply with the provisions of Table 5.0.6.
Seismic fortification categories for air transport buildings
Table 5·0·6
Airport buildings, air traffic control buildings, large hangars, communications and power supply, heating, water supply, and gas supply buildings in major international or domestic trunk airports Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Energy buildings
This chapter applies to the seismic fortification of buildings for the production of electricity, coal, oil and gas. 6.0.1
Energy system production buildings should be classified into seismic fortification categories based on the scope of production-related enterprises and the size of economic losses after earthquake damage. 6.0.3
The seismic fortification categories of various types of power plants shall comply with the provisions of Table 6.0.3. Seismic fortification categories of power plants
Thermal power plants with a single unit capacity of 300MW and above or a planned capacity of 800MW and above, 330kV and 500kV substations, important hub substations of 220kV and below, communication facilities that should not be interrupted and important power facilities that must maintain normal power supply during earthquakes, main plant buildings, electrical complex buildings, network control buildings, dispatching and communication buildings, distribution equipment buildings, smoke diagrams, flues, coal crusher rooms, coal transfer stations and coal handling trestle bridges, seismic fortification of petroleum and natural gas production buildings The seismic fortification categories shall comply with the regulations in Table 6.0.4. Seismic fortification categories for petroleum and natural gas production buildings
Joint stations, compressor rooms, pump rooms of pressurized gas stations, valve groups, heating furnace buildings of large oil and gas fields
Large computer rooms and tape libraries
Liquefied gas stations of oil storage and transportation systems, light oil pump rooms and nitrogen stations, first and last stations of long-distance pipelines, intermediate pressure pump stations
Main power supply and water supply buildings of oil and gas fields
6.0.5 The main factory buildings of the coal industry can be considered as Class C buildings. 6.0.6
Seismic fortification categories of production buildings in the coal industry shall comply with the regulations in Table 6.0.6 Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Seismic fortification categories of production buildings in the coal industry
Coal mines with an annual output of 900,000 tons or more and buildings with hoisting systems, water supply systems, drainage systems, power supply systems, ventilation systems, communication systems, and gas emission systems; Coal mine disaster relief systems, power supply systems, and water supply systems; Engineering Construction Standard Full-text Information System
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