日本欧美一区二区三区不卡视频_亚洲欧美日韩中文字幕一区二区_日韩免费视频一区二区_欧美黑人粗大猛烈18p

To ensure the safety of construction steel structure with a characteristic Han

To ensure the safety of construction steel structure with a characteristic Han

1, good airtight performance

Due to be able to do a thorough seal welded structure, some requests airtight and watertight good pressure vessels, large oil depots, gas cabinets, pipelines are constructed of steel plate and shell structure. Guangzhou Steel

2, has a heat resistance

Temperature within 250 ℃, the changing nature of the steel is very small, the temperature reaches above 300 ℃, the strength decreased, reaching 450 ℃ ~ 650 ℃, the strength is reduced to zero. Therefore, the steel structure can be used for a temperature of not higher than 250 ℃ occasions. In itself, there is a special request to build the fire, the steel structure must be maintained with refractories.

3, poor corrosion resistance of steel structure

The biggest drawback of the steel structure is easy to rust. New construction of steel structure generally takes careful rust, galvanized or paint brush. After a certain time interval, again, paint brush, high maintenance costs.

4, elastic, plastic, and strong seismic performance

Under the same conditions as the bearing capacity, steel construction and reinforced concrete construction, compared to wood structure, components smaller, lighter, easy to transport and install. Due to homogeneity and toughness of the steel material, may have large deformation, it can be an excellent withstand dynamic loads, with excellent shock resistance. Meanwhile, the yield ratio is an important parameter to measure the hardening capacity of steel. The lower the yield ratio, ability to resist strong earthquakes steel structure stronger. Request the European construction steel yield ratio is less than 0.91, while Japan requested the construction of steel yield ratio of less than 0.80. Meanwhile, the steel structure with good elastic, plastic and impact resistance, in general, the steel structure of the ability to adapt to dynamic loads, its good ductility and energy dissipation capacity to ensure that it does not because of the sudden changes in the external load fracture, seismic steel structure which is very advantageous.

In addition, these features steel construction, not only can effectively reduce the cost of construction projects, but also makes it in dealing with special foundation and other significant advantages. Guangzhou Steel