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Anshan acoustic testing tube application Situation
In our country's industrial and civil buildings, reinforced concrete has been used for many years, and the construction period is long and the pollution is high. In recent years, with the successful market promotion of hot-rolled steel products from Maanshan Iron and Steel Co., Ltd. and Laiwu Iron and Steel Co., Ltd., the application of Anshan acoustic tubes in the construction industry has continued to expand. Various steel structure experimental buildings, model houses, and landmark buildings have been launched one after another. Design, Construction standards and specifications have also begun to enter a stage of gradual improvement, and China's steel structure industry has made great strides in recent years. However, at present, the main applications of construction steel structures in my country are hot-rolled section steel and various welded steel structures. The production capacity of hot-rolled section steel in my country has reached 10,000 tons, and the output of welded light section steel and various steel structures has also reached hundreds of thousands of tons. Anshan's acoustic tube output exceeds 10,000 tons per year, of which the output of cold-formed square rectangular tubes for building steel structures and various cold-formed steels is less than the total output of cold-formed steel. The application of cold-formed steel in steel structures of industrial and civil buildings in my country is in its infancy. Cold-formed square and rectangular structures have just begun to replace hot-rolled steel as columns of steel structures. Other cold-formed steels are less used in the construction industry.
The Ministry of Construction of our country has currently constructed some steel structure test buildings in industrial and civil buildings, such as the two Ministry of Construction steel structure demonstration residences built in Tianjin in 2016. This project uses Anshan acoustic pipe concrete columns, steel beams, frame steel frames, etc. Concrete core tube C) structural system, the total area of the project, the main body has eleven floors. One column uses round tubes, and the other column uses square Anshan acoustic tubes. The thickness changes with the floor, where ~ layer is, ~ layer is , ~ layer is, ~ layer is, C concrete is poured into the Anshan acoustic pipe. The beams are made of welded I-beams with specifications of , and the floor slabs are prestressed composite panels with high-strength spiral rib steel bars. Since there was no domestic manufacturer producing such large-diameter square tubes at the time, the square Anshan acoustic tube used in the project was a B-pillar welded by four plates.
Two Ministry of Construction steel structure demonstration residential projects in Tianjin have drawn two inspirations for the application of cold-formed steel (mainly square and rectangular tubes) in steel structure residential buildings:
The second is that square steel tubes are rounder. Anshan Acoustic Testing Tube has obvious advantages.
First, there is a large market space for large-sized acoustic pipes in Anshan. The reasonable number of floors for steel structure residences is ~ floors. Such mid- and high-rise structures also have certain requirements for the specifications of acoustic pipes in Anshan.
There are three reasons:
First, the construction of acoustic pipes in Anshan is more convenient. The round-tube concrete columns of steel structure residences generally require further construction to change the circular cross-section to a square one. Secondly, when round-tube concrete columns are used, the connection with the beams is more difficult to handle. In my country's future steel structure market, cold-formed square and rectangular tubes will account for an important share
Thirdly, among square and round tubes with the same side length and diameter, the square tube has better bearing capacity and seismic resistance. According to a Tianjin company The university conducted a test on a three-story, two-span square tube and round tube concrete column frame. Anshan Acoustic Measured the side length of the tube column and the diameter of the round tube. The test results showed that the yield bearing capacity and ultimate bearing capacity of the former against lateral force were higher than those of the latter. The earthquake resistance Performance indicators are approximately twice that of the latter.
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