The steel structure has the following characteristics:
First, although the bulk weight of the light steel structure is larger, its strength is much higher than that of other building materials, so when the load and conditions are the same, the steel structure is lighter than other structures and is easy to transport and install. and can span a larger span.
Second, the plasticity and toughness of steel are good, so that the steel structure will not break suddenly because of accidental overloading or local overloading. If the toughness is good, the steel structure has strong adaptability to dynamic load. These properties of steel provide a full guarantee for the safety and reliability of steel structure.
Third, the internal structure of steel is closer to that of homogeneous and isotropic steel, very close to homogeneous and isotropic, and almost completely elastic within a certain stress range. These properties are in good agreement with the assumptions in the mechanical calculation, so the calculation results of the steel structure are more consistent with the actual stress.
Fourth, the steel structure is easy to manufacture and easy to adopt industrial production. The steel structure with short construction and installation period is composed of various profiles and is easy to make. A large number of steel structures are manufactured in specialized metal structure factories. The made components are transported to the site for assembly and are bolted, and the structure is light, so the construction is convenient and the construction period is short. In addition, the built steel structure is also easy to disassemble, strengthen or transform.
Fifth, the sealing of the steel structure is good. The air tightness and water tightness of the steel structure are good.
Sixth, the heat resistance of the steel structure is good, but the fireproof performance is poor. The steel is heat resistant and can not withstand high temperature. As the temperature increases, the strength decreases. When there is radiant heat around and the temperature is above 150 degrees, shielding measures should be taken. If there is a fire and the temperature of the structure reaches more than 500 degrees, all of them may collapse instantly. In order to improve the fire resistance of the steel structure, it is usually wrapped in concrete or brick.
Steel is easy to rust, protective measures should be taken, steel is easy to rust in wet environment, especially in the environment with corrosive medium, must be painted or galvanized, and should be maintained regularly during use.
