The steel structure has the characteristics of light weight, high strength, good plasticity and toughness, and short construction period, so it has been widely used and developed in construction engineering. According to incomplete statistics, from 1964 to 1977, there were about 8,000 buildings of different sizes in China, which used a steel grid structure with a total coverage of 900 square meters. The high-rise steel structure projects that have been built and under construction in China have...