改革开放以来,随着经济的发展,工业及城市规模不断扩大,在对钢材的需求量不断上升的同时,我国的钢产量在几年中也名列世界第一。由于钢结构具有建造周期短、设计制造方便、使用寿命长、造价低等特点不但在大型建筑及工业厂房中大量使用,而且在生产生活等各个领域也广泛应用。为 Since the reform and opening up, with the development of economy and the continuous expansion of industry and city size, while the demand for steel has been on the rise, China's steel output also ranked first in the world in a few years. Due to its short construction period, convenient design and manufacture, long service life and low cost, the steel structure is widely used not only in large buildings and industrial plants, but also in various fields such as production and living. for