日本近十几年来,H型钢的生产迅速增加,1973年H型钢生产量为564.3万吨,占钢结构用型钢总生产量的51.1%,1975年H型钢生产量增加到795.5万吨。H型钢结构也因此得到很快发展和广泛使用。主要用于高层和超高层建筑以及单层和多层工业厂房,还有大型公共建筑物和构筑物,如展览馆、会议厅、剧院、停车场、体育馆、桥梁、基础桩、隧道支护工程、海洋构筑物、管道支架、铁 In the past ten years in Japan, the production of H-beams has rapidly increased. In 1973, the production of H-beams was 5.643 million tons, accounting for 51.1% of the total steel production for steel structures. In 1975, the production of H-beams increased to 7.955 million tons. H-shaped steel structures have therefore also been rapidly developed and widely used. Mainly used for high-rise and super high-rise buildings, single-storey and multi-storey industrial plants, as well as large-scale public buildings and structures such as exhibition halls, conference halls, theaters, parking lots, stadiums, bridges, foundation piles, and tunnel support works. Marine structures, pipe supports, iron