Does seismic fortification intensity 6 calculate seismic force

1. 1、 When the seismic fortification intensity of
1 and 3.1.2 in the relevant provisions of the code for seismic design is 6 degrees, except for the specific provisions in this code, the seismic action calculation is not required for class B, C and D buildings
it is mentioned in the article that the code specifies that when fortification is 6 degrees, the seismic design can only carry out the design of seismic measures, but not the calculation of seismic action, except for the specific provisions
2, 5.1.6 the cross-section seismic checking calculation of the structure should comply with the following provisions:
1 6 degree buildings (except irregular buildings and high-rise buildings built on class IV site), as well as raw soil buildings and wooden buildings, should
meet the requirements of relevant seismic measures, but should not be allowed to carry out cross-section seismic checking calculation< For irregular buildings at 26 degrees, high-rise buildings built on class IV sites, and building structures at 7 degrees and above (except raw earth buildings and wooden buildings,
etc.), the cross-section seismic checking calculation under frequent earthquakes should be carried out
2. Conclusion the seismic action of class a buildings needs to be calculated at 1 and 6 degrees
2 and 6 degrees, irregular buildings need to calculate the earthquake action. For the definition of irregularity, please refer to 3.4.3

2. 1. It is clearly stipulated in the anti-seismic code that the buildings of grade 6 and above must be designed for earthquake resistance. 2. It is not necessary to calculate the seismic action of class B, C and D buildings in 6 degree area

3. 1、 According to the relevant provisions of the code for seismic design
1 and 3.1.2, when the seismic fortification intensity is 6 degrees, in addition to the specific provisions of this code, the calculation of seismic action may not be carried out for class B, C and D buildings.
it is mentioned in the description of the article that this code specifies that when the seismic fortification intensity is 6 degrees, unless there are specific provisions, The anti-seismic design can only carry out the design of anti-seismic measures, but not the calculation of seismic action.
2. The cross-section anti-seismic checking calculation of 5.1.6 structures should meet the following requirements:
the buildings at the degree of
16 (except irregular buildings and high-rise buildings built on class IV site), as well as raw soil buildings and wooden buildings, should
meet the requirements of relevant anti-seismic measures, However, it should not be allowed to carry out cross-section seismic checking calculation.
2. Irregular buildings with degree 6, high-rise buildings built on class IV sites, and building structures with degree 7 or above (except raw earth buildings and wooden buildings,
etc.) should be subject to cross-section seismic checking calculation under frequent earthquakes.
2. Conclusion 1. Class a buildings need to carry out seismic action calculation when degree 6 The seismic action of irregular buildings should be calculated at 6 degree. For the definition of irregularity, see 3.4.3 of the code for seismic resistance

4. It depends on the type of bridge. According to the level of seismic fortification measures for highway bridges, if the basic intensity is 6, the seismic fortification intensity is 6: for a and B bridges, the level of seismic fortification measures is 7. C. Class D bridge fortification measures are Grade 6

5.

1. Seismic grade

seismic grade refers to the specific design of different seismic grades adopted by the design department according to the relevant national regulations, according to the "building importance classification and fortification standard", according to the intensity, structural type and building height, etc. Taking the reinforced concrete frame structure as an example, the seismic grade is divided into four grades, which are very serious, serious, more serious and general. In China's construction instry, this grade standard has been strictly implemented

The seismic fortification intensity is the seismic intensity approved by the state as the basis of seismic fortification in a region

When the seismic fortification intensity is determined, the design basic seismic acceleration, design characteristic period and design ground motion parameters are determined

When determining the standard value of seismic action, the design basic seismic acceleration value is used, and the corresponding relationship between acceleration and fortification intensity is pointed out in 3.2.2 of seismic code

generally speaking, buildings need to resist the damage degree of seismic wave to buildings, which should be different from the earthquake magnitude

The value standard of fortification intensity is the basic intensity, which is the seismic intensity with a probability of exceeding 10% under the general site conditions in the next 50 years. The specific value is determined according to the seismic fortification zoning in the seismic code. For example, the seismic fortification intensity in Beijing is 8 degrees

3. The relationship between seismic grade and fortification intensity< br />

6. For ordinary instrial and civil buildings, according to the seismic code, the calculation of seismic action can not be carried out, but the seismic structural measures should be taken
so strictly speaking, the effect of horizontal earthquake is considered, but the calculation of earthquake effect is not carried out, but seismic measures, such as stirrup densification, still need to be done
you are 21m high, not high-rise. If it belongs to a high-rise building, according to the high-rise code, even in the area of 6 degrees, the seismic action should be calculated
other special buildings and structures shall comply with the provisions of the special specifications.

7. Unknown_Error

8.

Seismic fortification intensity and seismic grade are two concepts, which can not be converted. The former is that the state stipulates that a certain area must be fortified according to the specified fortification intensity, while the latter is that the designers determine the seismic grade according to the characteristics and importance of buildings according to the specifications. Sometimes the seismic grade is different in different locations of the same building

the seismic fortification intensity is approved as the seismic fortification basis of a region according to the authority of the state. At present, the seismic fortification of 6, 7, 8 and 9 degrees and no fortification are considered in the seismic code

according to the current code for seismic design of buildings (GB 50011-2001), the seismic performance of concrete structures is divided into four different levels: one, two, three and four. The first level seismic requirement is the highest, and the fourth level seismic requirement is relatively low. For example, article 6.1.2 of code for seismic design of buildings (GB 50011-2001) specifies the seismic grade of cast-in-place reinforced concrete buildings

{rrrrrrr}

extended data:

seismic requirements:

capital and municipalities directly under the central government

1 the seismic fortification intensity is 8 degrees, and the design basic seismic acceleration value is 0.20g:

group I: Beijing (Dongcheng District, Xicheng District, Chongwen District, Xuanwu District, Chaoyang District, Fengtai District, Shijingshan District, Haidian District, Fangshan District, Tongzhou District, Shunyi District, Daxing District Pinggu, Yanqing), Tianjin (Hangu, Ninghe)

The second group: Beijing (Changping District, Mentougou, Huairou and Miyun); Tianjin (Heping District, Hedong, Hexi, Nankai, Hebei, Hongqiao, Tanggu District, Dongli, Xiqing, Jinnan, Beichen, Wuqing, Baodi, Jizhou District, Jinghai)

Group 1: Shanghai (Huangpu District, Luwan District, Xuhui District, Changning District, Jing'an District, Putuo District, Zhabei District, Hongkou District, Yangpu District, Minhang District, Baoshan District, Jiading District, Pudong District, Songjiang District, Qingpu District, Nanhui District and Fengxian District)

The second group: Tianjin (Dagang)

Group 1: Shanghai (Jinshan) and Chongming district; Chongqing (Yuzhong, Dakou, Jiangbei, Shapingba, Jiulongpo, Nan'an, Beibei, Wansheng, Shuangqiao, Yubei, Banan, Wanzhou, Fuling, Qianjiang, Changshou, Jiangjin, Hechuan, Yongchuan, Nanchuan, Bishan, Tongliang, Dazu, Rongchang, Qijiang), Wushan, Fengjie, Yunyang, Zhongxian, Feng, Shizhu, Wuxi

note: the superscript indicates that the center of the town is located at the boundary between the fortified area and the lower fortified area, the same below