Analysis and improvement of steel structure welding technology and quality are of great significance_News_My website

The development of my country's steel structure industry has already reached a certain scale. The key technology and production quality of steel structures such as welding technology play a very important role in construction projects. From the perspective of the development scale of steel structures, my country has become a major steel producer in the world. In 2005, China's production of steel has exceeded 300 million tons, of which the output of steel structures is as high as 140 million tons. pillar. With the rapid development of my country's construction industry, the role of building steel structures in the development of the national economy is becoming more and more important. In 2005, about 11.55 million tons of steel were used in construction steel structures nationwide, an increase of 38% from 8.36 million tons in 2002. High-rise steel structure, space steel structure, bridge steel structure, light steel structure, residential steel structure and steel structure workshop and other industrial and civil buildings are widely used in many parts of the country. Large-span space steel structures have been applied in various gymnasiums, exhibition centers, grand theaters, terminal buildings, hangars and some industrial plants. There are more than 60 high-rise and super-high-rise steel structure buildings that have been built. In the Yangtze River section from Yibin to Shanghai alone, more than 50 bridges have been built or are under construction, more than half of which are steel bridges, some of which can be called world-class bridges. my country's steel structure housing will also enter a new stage of rapid development. Under the vigorous promotion of the construction department, a number of demonstration, pilot projects and key technology research projects have been completed one after another. Judging from the engineering application characteristics of building steel structures in my country, many steel structure buildings have novel and unique shapes, numerous structural systems, complex node structures, and many forms of welded joints. As a result, the requirements for welding technology in component fabrication and on-site installation are also increasing. high. National Sport Stadium"bird's nest"The technical difficulty of steel structure engineering is a typical example. The high building height, large structural span and strong seismic performance also increase the welding quality requirements of main steel structures. The main parts of the structure, such as the connection weld between the frame beam and the column, the connection weld between the shear plate and the column, the connection weld between the beam web and the column, and the splicing weld of the column, are generally required to be groove penetration level 1. Welds, 100% ultrasonic flaw detection. The welding quality and fabrication quality must be guaranteed in order to play the due role of the steel structure.