Disadvantages of steel structure workshop

Due to the characteristics of the steel structure itself will be the overall instability or local instability, is related to the whole process of foundation and bolt, both are interrelated, most steel structure instability is caused by steel, once pressed parts and bending parts of the long

Fine ratio exceeds the standard value, it will lose stability. The objective factors that lead to instability are more effective, such as the load change, the initial defect of steel, the different support conditions will lead to instability. The foundation problem is divided into the foundation strength problem, the foundation deformation

Three kinds of problems and basic damage.

1, the strength of the foundation is generally manifested in the foundation, the foundation bearing capacity is insufficient, the foundation or slope stability.

2, the problem of foundation deformation is concentrated in the soft soil, wet and unfamiliar loess, expansive soil and seasonal frozen soil and other regions, these regions due to the load of foundation deformation and uneven settlement.

3, the foundation of the destruction of the form to live there are three forms of presentation, local shear failure, the overall shear failure and punching shear failure.

1, the majority of steel roof reconstruction is composed of thin wall C steel and slender rods, the shape of the cross section is complex, and the stress concentration of the joints also has eccentric gravity.

In 2, steel roof design, load calculation and the calculation model is correct and the calculation is close to the limit state, the structure bearing capacity of the minimum safety, humidity, overload and corrosion is very sensitive, it is easy to cause the loss of chance factors

Effect, if the manufacturing, installation and use of a variety of negative effects in the process of adding into the steel roof is the most serious damage to the steel structure of the plant parts.

3, the occurrence of failure of the main rod bending, roof collapse, the joint plate bending or cracking, frame member rupture, roof flexure roof support buckling, internal sink leakage and so on.

Steel structure workshop is exposed to the outside, not strong corrosion resistance of ordinary steel, especially humidity, a corrosive medium under the external environment, the steel structure is easy to rust corrosion, the bearing capacity greatly weakened. A large number of statistical data show that Because of the corrosion of steel roof truss, and lack of maintenance caused the collapse accident than in the total accounts for a large proportion.