The Steel Fireproof Door Requires That The Building Structure Cannot Collapse Under This End Condition

Before understanding its specific significance, it is necessary to introduce the basic concepts related to the reliability of housing structure. For example, if we want to buy a bed, of course, the basic requirement is that the bed should be strong, comfortable and durable. Therefore, firmness, comfort and durability are our three requirements for beds. The same is true for housing construction. We call these three requirements as serviceability, applicability and durability. When we comprehensively evaluate the three functional capabilities of the building structure, we take the structural reliability as the index: the steel fire door refers to the ability of the structure to withstand various possible actions under normal construction and service conditions, And the ability to maintain the necessary overall stability during and after the occurrence of accidental events. The definition includes the requirements of two stages in the life cycle of the house, that is, it is required to be able to withstand various possible functions during construction and use, and the possible functions refer to the requirements of the specification, The building may encounter a large combination of various loads and external actions during the design reference period, such as self weight, service load, wind and snow load, seismic load, foundation settlement, equipment load, etc.

At the same time, the definition of sex also stipulates the requirements of two levels. That is, normal construction, normal use and accidental events. Accidental events include environmental conditions such as large earthquake, strong typhoon and strong blasting, The steel fireproof door requires that the building structure can not collapse and lose the overall stability under this end condition, which endangers the applicability of people's lives: it refers to the ability of the structure to meet the predetermined function under normal use conditions. The applicability here requires a prerequisite for the building structure under normal use conditions, that is, the building structure is not overloaded Structural changes, changes in service conditions and changes in service environment. Under this condition, the document is required to meet the pre-designed functions, such as no excessive deformation, inclination, crack, etc., and no excessive vibration affecting the human body.

Durability: steel fireproof door refers to the ability of the structure to meet the predetermined function under normal maintenance conditions with time change. Durability is also based on normal maintenance and the time period of building design benchmark period. Under these two conditions, the structure is required to resist external effects with time change and still have the practical function given by the design. Structural reliability: refers to the ability of the structure to complete the predetermined function within the specified time and under the specified conditions, including the foregoing, applicability and durability. When this ability is measured by probability, the specified time of structural reliability "refers to the design reference period. As specified in the aforementioned unified standard for reliability design of building structures: temporary structure year, replaceable structure year, Ordinary houses and buildings are years, and memorial or important buildings are more than years. "Specified conditions" refer to the load, environment, action and other relevant conditions of the building specified by the designer in accordance with the design specifications and the service conditions of the building. "Ability to complete the intended function" refers to the aforementioned requirements of "suitability, applicability and durability". However, as we all know, everything is relative and the structure will not exist. Therefore, researchers and technicians measure this ability in combination with probability theory. In short, when the probability of structural failure is small to a certain extent, we think it is.