The safety of the house is the first premise of buildin […]
The safety of the house is the first premise of building a house. The firmness of the house is the key issue that the residents are concerned about. If an earthquake strikes, can your house stand on that land after the disaster?
The following basic requirements are put forward for the seismic design of houses
1. Structure Type of prefab steel house
Common structural systems of steel structure housing include frame structure, frame-support structure, frame-seismic wallboard structure, simplified structure and mega-frame structure. The seismic performance of steel structure housing depends on the type selection of structure. In actual engineering design, various factors need to be comprehensively considered to optimize the scheme, and the appropriate structural system should be determined in the optimization process.
2. Principles of Structural Arrangement of steel structure housing
The choice of steel structure housing's structural system and structural arrangement is related to the safety, applicability and economy of the structure. Like other types of building structures, multi-storey and high-rise steel structure housing should try to adopt regular building schemes. When the structure is complicated and the plane elevation is especially irregular, shockproof continuation can be arranged at appropriate positions according to actual needs, thus forming a plurality of more regular lateral force resistant structural units. As the structural deformation that the steel structure can withstand is larger than that of the concrete structure, generally speaking, it is not appropriate to set up anti-seismic joints. When necessary, the width of the anti-seismic joints should not be less than 1.5 times of the corresponding reinforced concrete structure houses.
3. Maximum height and aspect ratio applicable to steel structure housing
According to the overall height of the structure and the seismic fortification intensity, the structure type and the maximum applicable height are determined. The aspect ratio of the structure is an important parameter that affects the overall stability and seismic performance of the structure. It has a direct impact on the stiffness, lateral displacement and vibration form of the structure. Height ratio refers to the ratio of the total height of the house to the smaller width of the plane. When the aspect ratio value is large, on the one hand, the structure will produce large horizontal displacement and P - A effect, and on the other hand, the overturning moment will produce large axial force on the column. Therefore, it is necessary to set a limit value for the maximum aspect ratio of steel structure housing, which should not be greater than a reasonable limit value. In case of exceeding the limit value, special research should be conducted and necessary anti-seismic measures should be taken.
With people's continuous understanding of earthquakes, in order to prevent the occurrence of serious earthquake disasters, causing property losses and casualties. People's seismic requirements for high-rise steel structure housing are constantly improving. In the seismic design of high-rise steel structure housing, we should first start with conceptual design and formulate a more reasonable design scheme to ensure the realization of the seismic fortification target of the building.
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