浅谈我国建筑钢结构的前景与差距发布时间：2016/8/29 10:19:24 浏览次数:629
From the United States, Japan, Europe, some developed countries experience, the construction industry will become the primary market for the use of steel. And now there is a gap between China and the comparison. Therefore, China's high-rise building steel so far have been imported from abroad, especially more than 50mm; thick steel plate, domestic products of the Z to the function is still not up to the request. Abroad not only larger thickness, and can be satisfied with a variety of functional requirements. Such as Japan now can produce 100mm thick steel plate, with the following types:
High strength low preheating type (before the preheat 75 C, 50 C now preheat C) thick steel plate 590N/mm2 grade (grade HT590);
II for earthquake resistance of thick steel plate, first and foremost a low yield ratio, high strength steel (HT590 ~ HT780 level) and low yield point steel, the Japanese steel key production, for non essential structure, when the earthquake this data to submit to ensure primary structure cut earthquake loss;
Fire thick steel plate. There are 400N/mm2 and 490N/mm2, when the yield strength at 600 degrees Celsius can reach the normal temperature of 2/3;
The austenitic stainless steel plate used in the decoration and ferritic stainless steel plate (Binhai, better than the former).
Now, the domestic high-rise steel structure made of steel almost imported from abroad project to always contract by foreign to bear, made and installed by the domestic cheap labor contract, this situation should change quickly. Due to this and made in China steel big country position is not equal. Large span steel structure made of steel as high rise steel made that outstanding, but design scheme (including building and construction) often foreign bid, this kind of situation and central emphatically set up we call the system of innovation of science and technology of far apart, we should arouse the concern of China construction industry, is other reason is still at a low level, it is worth our meditation.