1。Material characteristics of steel structure

1.1The material has high strength, good plasticity and toughness.In general, Guizhou steel structure will not be brittle fracture due to overload, and has strong dynamic load resistance.Good energy absorption capacity and ductility also make steel structure have superior seismic performance.Practice has proved that steel structure is especially suitable for long-span, large load components and structures, with high safety and reliability.

1.2The quality of steel structure material is even and light.The internal structure of the steel is nearly homogeneous and isotropic, and almost completely elastic in a certain stress range.At the same time, the lightweight of steel structure provides convenience for construction and favorable conditions for projects requiring long-distance transportation.

1.3Accurate component size.A large number of steel structure components are produced by professional processing plants.The whole process from materials to components has high precision and is easy to carry out strict quality control.

The steel structure material is a single finished product, which is easy to process and highly mechanized.Most of the parts are transported to the site after production in the processing plant, and assembled on the site: ordinary bolts and high-strength bolts with simple operation are generally used for assembly, and large units can be assembled and welded on the ground for hoisting, thus shortening the construction period.

The materials used in the steel structure can be used many times.At the same time, the steel structure building has good variability, such as strengthening and improving, expanding the floor, internal separation and easy replacement, flexibility, reducing the construction site of sand and stone cement stacking, reducing the noise and dust pollution of the formwork warehouse and the wet operation of the concrete construction site.It is an environmental protection building material.

2。Good comprehensive benefit of steel structure

2.1The size of steel structure members is small, which enlarges the scope of use.Due to the mechanical properties of steel, the cross-sectional area of steel structure members is smaller, so the structural area is far smaller than that of reinforced concrete structure.Statistical data show that the area of economical structure is larger than that of reinforced concrete structure of the same scale.

2.2It is very convenient to set up pipes to increase the height of the net floor.According to the functional requirements of the building, small truss beams, lattice beams or hollow beams are used in the section area of beams and columns to make the pipeline directly pass through the beam web. Under the design conditions of the same floor height, the net height can be increased by 10%.There are many vertical pipes in modern architecture.The wiring of automatic sprinkler system and automatic control system in strong and weak electrical buildings is also complex.The steel structure system is easy to fix, cross and maintain.

2.3The steel structure is light in weight.Compared with reinforced concrete structure, the weight of steel structure can be reduced by 1 / 3-1 / 2.The reduction of structure weight can greatly reduce the cost of foundation construction.More importantly, when an earthquake occurs, the seismic effect will decrease significantly with the decrease of self weight.

2.4The plane layout of large span and large space can be obtained.The characteristics of light weight and high strength make the steel structure obtain larger span and depth, thus forming a more open column free space, which is convenient for the flexible layout of the internal plane.