In the case of 7-degree seismic fortification, the maximum height-width ratio of frame structure is usually determined according to the specific building requirements and site conditions. According to China's building code, generally speaking, the maximum height-width ratio of frame structures should not exceed 5.
The aspect ratio refers to the ratio of the height to the width of a building. This ratio has an influence on the stability, earthquake action and wind resistance of the structure. If the height-width ratio of a building is too large, it may increase the influence of earthquake and wind load and pose a threat to structural safety.
Therefore, in the 7-degree seismic fortification, the maximum height-width ratio of the frame structure should be reasonably limited according to the specific building requirements and site conditions to ensure the safety and stability of the structure. If more accurate information is needed, it is recommended to consult professional structural engineers or experts in related fields.
What is the seven-degree seismic fortification level?
The seismic fortification level is 7 degrees, and its seismic level may be 1, 2, 3 or 4. It is impossible to determine the seismic grade of buildings only by the seismic fortification grade.
Seismic fortification level refers to the seismic intensity approved as the basis for seismic fortification in an area according to the authority prescribed by the state. The level of seismic fortification in a region is unique. Once the construction site is determined, the seismic fortification level is determined, regardless of other factors such as structural type.
Seismic grade refers to the specific design of different seismic grades adopted by the design department according to the relevant provisions of the state, the Classification and Fortification Standard of Building Importance, and factors such as intensity, structural type and building height. Taking the reinforced concrete frame structure as an example, the seismic grade is divided into four levels, that is, very serious, serious, serious and general.
The seismic grade reflects the requirements of calculation and structural measures for specific buildings under different seismic fortification categories, different intensities, different structural types and building heights. Seismic grade is not only related to seismic fortification intensity, but also related to several other factors.
Take the frame structure as an example. Also in the 7-degree fortification zone, the height is not more than 24m, and the seismic grade is level 3; More than 24m, for the second level; Long-span frames, no matter how high, are secondary.