Technical And Economic Analysis Of Multi-story Steel Frame Structure With Different Floor Systems

With the development of market economy,the requirement of building engineering is higher and higher.The basic principles are: advanced technology and reasonable cost.Advanced technology is mainly in the use of new materials,structural design methods and construction technology conditions,and economic rationality is in the life cycle of the economic rationality of the cost.On the way of deepening the reform,the research on the combination of technology and economy is more suitable for the long-term development of China's construction industry.As the horizontal structure system of building,the floor is an important part of the high-rise building.The choice of floor system not only affects the structure of the force,but also has a great impact on the cost of the construction.There are many kinds of floor of steel structure,generally more commonly used are cast-in-place reinforced concrete slabs combined floor,prefabricated reinforced concrete composite panels,pressure plate-concrete composite floor,prefabricated panels-laminated floor,combined flat beam floor and so on.At present,the study of steel structure,mainly concentrated on the mechanical properties or a single floor of the technical and economic analysis,the lack of commonly used floor for technical and economic analysis.This paper through the PKPM software to establish cast-in-place reinforced concrete composite floor,pressure plate combination floor,the combination of flat beam floor in a variety of column size model,using SATWE software to analyze the internal force of the structure,to get the different forms of floor in different columns under the amount of various materials,the analysis of different floors to give the optimal design.According to the amount of material calculated,combined with the cost of materials,different floor in different columns under the unilateral cost,so as to obtain the optimal choice of floor form under different column net.Through the comprehensive analysis of the whole life cycle of the three kinds of floor forms,it is concluded that the steel plate-concrete composite floor and the composite flat beam floor are more technologically advanced and environmentally friendly in line with the sustainable development and circular economy trend.When the cast-in-place reinforced concrete slab composite floor is used in multi-story steel frame structure,the steel consumption is the least.When the size of columns is large enough,the consumption of the composite flat beams of steel is the largest.The amount of reinforcement,the composite flat beams,reinforced the least dosage,profiled steel sheet concrete composite floor,cast-in-place reinforced concrete slab composite slabs reinforced the maximum amount.From the aspects of cost comparison,using cast-in-place reinforced concrete composite floor board,the minimum comprehensive cost;when the column size larger than 7.5m?7.5m,compared with the composite flat beams,the profiled steel sheet concrete composite floor cost is low.