Rational Design of Steel Structure Portal Frame

The steel structure of light-weight buildings with portal frame has the following features: the column net is not limited by the building modulus, and the layout is relatively flexible; it is convenient for prefabrication, installation and construction, and disassembly; the explosion relief area is large, and it is easy to meet the explosion relief requirements of petrochemical units; The advantages of green environmental protection and resource recycling have been widely used in petrochemical project construction, but its design is not reasonable and waste often occurs. The reasonable design and optimization of light-weight buildings with gabled frames is a systematic and complex whole project; This paper analyzes and discusses the rationality and the possibility of optimization of a certain design from the aspects of the determination of the structural type, the importance grade, the load value, the span and the column distance, the purlin calculation, the longitudinal support arrangement, the connection node and so on, so as to make the structural design of the house more reasonable and save the investment.