Design Study And Technical Economy Analysis Of Medium High-Rise Steel Structural Residence

Steel structural residence with light weight, good seismic performance, short construction period, a high degree of industrialization, good effect of environmental protection and other features, is developed with China's national economic sustainable increment. The construction of steel structural residence in China should accord with the conditions of the nation as well, not copying the western countries. With the urbanization process and the sustained and stable economic development, the contradiction between the scarcity of land resource and the needs of improving the quality of living become more and more evident. Medium high-rise steel structural residence (MHSSR) may be a good way to solve the problem.In this thesis, 10 to 16-storey MHSSR is evaluated by using the methods of theoretical analysis, numerical simulation and engineering examples, based on the finite element analysis and the comparison analysis. The design parameters of the MHSSR in areas where seismic fortification intensity is 6 to 8 degrees, the changes of technical and economic status in different systems and their sensitivity to relative factors, and the indicators of comprehensive evaluation are explored. According to the results, more quantitative theoretical evidences can be acquired for the development, design, construction and promotion of MHSSR, and can reduce blindness.The main conclusions of this thesis are as follows:(1) The steel frame structure can fulfill the need of the medium high-rise residence in the areas with 6-7-degree seismic fortification intensity and may be more economical than the steel frame-brace structure.(2) The steel frame-shearwall structure is the most economical system and is more suited to be applied in high seismic fortification intensity areas. It also performs better than other systems in price, ratio of steel and usable area.(3) Ratio of steel, price of steel and price of wallboard are the main factors which affect the cost of MHSSR. Therefore, in order to reduce the cost of steel structural residence, the most important is to reduce the ratio of steel, followed by paying attention to the risk of the steel price fluctuations and controlling the price of wallboard. The sensitivity of steel ratio and steel price is raised along with the improvement of seismic fortification intensity, but the wallboard price is on the contrary. The steel frame-shearwall structure is less sensitive to the steel ratio and steel price than the steel frame structure and the steel frame-brace structure. There is no significant difference between the compound sensitivity to steel-cement price of the steel frame-shearwall structure and which of R.C. frame-shearwall structure.