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EnglishHow to design fire-proof glass reasonably
Fireproof glass curtain wall shall have all the characteristics of curtain wall. Such as wind pressure, rain, air leakage, in-plane deformation and other characteristics. As a kind of glass curtain wall with fire prevention function, in addition to the above functions, fire prevention function is more important.
Smoke prevention planning
In order to achieve the smoke prevention effect of the curtain wall structure, it is necessary to have excellent sealing function, not only the sealing function mentioned in our curtain wall function, but also the fireproof sealing function, and have excellent sealing effect within a certain time of fire. Therefore, the open structure curtain wall and the unit curtain wall planned by the open system are not suitable for the structure of fireproof glass curtain wall. Compared with the sealing planning of ordinary curtain wall, two points should be paid attention to: the inner cavity of profile should be sealed. In the planning of ordinary curtain wall, the insertion and transmission of vertical materials may form a superposition effect. In the planning of fireproof glass curtain wall, the cavity shall be sealed with flame-retardant materials. On the other hand, the sealing failure caused by large thermal expansion and deformation of curtain wall in case of fire should be considered. Therefore, waist shaped holes shall be selected for the connection parts of the connection structure of fire-proof glass curtain wall, and the sealant with good elasticity and fire prevention function shall be selected for the selection of sealing materials.
Fire integrity planning
In case of fire, the selected curtain wall shall not collapse within the planned time limit. Therefore, the fire integrity planning should consider the connection between the curtain wall and the main body, and then the selection of materials.
1. The fireproof glass curtain wall shall be intact and independent.
As the peripheral structure of buildings, fireproof glass curtain wall is used to prevent the vertical spread of fire. It is generally only part of the curtain wall. In order to prevent it from collapsing in fire, the curtain wall of its connecting part shall be separated from the skeleton structure and fixed with the main structure. Assuming that the plug-in method of traditional curtain wall is selected, the fireproof part will fail due to the collapse of non fireproof part.
2. The structure of fireproof glass curtain wall shall have the ability to absorb heat deformation.
In case of fire, the metal structure of curtain wall or partition wall will swell and stretch due to heat. If not handled properly, the structure will be damaged due to swelling and kneading, and then prevent fire. Therefore, when planning, it is a key problem to consider the details of selecting long waist holes or other reserved deformation positions at the connection parts.
3. The materials of fireproof glass curtain wall shall have fire resistance
Within ten minutes after the fire, the uniform temperature of the flame is about 700 ℃. Within 20 minutes after the fire, the flame temperature is generally about 800 ℃. Within 30 minutes after the fire, the uniform flame temperature is about 840 ℃. It can reach 925 ℃ in one hour. According to the fire-proof time limit requirements for the construction of fire-proof curtain wall or partition wall, the selection of appropriate fire-proof materials is the basis for the unity of function and economy. The framework material of curtain wall is aluminum profile and steel profile, but the melting point of aluminum is about 400 ℃. Under the effect of high temperature fire, the yield strength, elastic modulus and other mechanical functions of steel will decrease with the increase of temperature. At about 550 ℃, the decrease is more significant, and the bearing capacity will be lost in about 15 minutes. It can be seen that if fire prevention measures are not adopted, the fire will be burned within 15 minutes. Therefore, as the structural material of fire-proof glass curtain wall, fire prevention treatment is required. Fireproof glass is selected as the main material of fireproof glass curtain wall and partition wall. Now there are many kinds of fire-proof glass, so the selection should be summarized and considered in terms of construction and decoration effect, strength, fire resistance and so on. The fire resistance of the connecting part is the foundation of the integrity of the whole system, and the embedded parts and connecting parts of the connecting part shall be provided with a fire-proof layer.
Article source: fireproof glass http://www.twqwq.cn/
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