Research Of Anti-seismic Performance Of Multi Story Steel Structure Buildings In High Intensity Area

By 2015 China's per capita living area of 10 square meters of urban households more than 7000 households, urban households housing area of less than 20 square meters accounted for 7.8%, 20-40 square meters accounted for 32.7%, while the housing conditions of urban migrants even worse. At the same time, compared with developed countries, China's high prices, the high price in terms of low-income families is tremendous pressure. As the housing industry in the field of emerging forces, academic research and discussion steel housing market is also more and more attention.The main material for steel steel housing, its excellent material strength and ductility, as well as convenient construction demand(construction progress fast) and excellent seismic performance. Coupled to sustainably use its features, while his high utilization of space(small component size), and other advantages. This paper selects a certain representative 6 floor plate steel frame homes, the main structure of a height of 20.1m, as an engineering instance, which is 9 degrees fortification area, a high intensity areas. Using finite element analysis program using seismic response of steel framework program of the dwelling, and under the same conditions with concrete programs of technical and economic comparison. The main contents are as follows:1. Adoption of the finite element analysis software SAP2000 first instance the engineering model and define material properties related to the boundary conditions, load, etc. Select the appropriate loading conditions. Seismic performance of a variety of modes of analysis, to discuss its operating performance in the earthquake nine high intensity regions, failure mechanism, energy-intensive way.2. Based on the above analysis, the program of pure steel frame, steel frame-supported program, steel frame- shear wall program to compare the seismic performance parameters. Analysis of the force structure features three kinds of programs, as well as evaluation of the advantages and disadvantages of its scope and structure.3. Pure Steel framework based on the finite element calculation results, the corresponding member-sectional dimension of concrete solutions and optimized size. Further comparative analysis of economic performance of steel frame and concrete frame, in terms of the base portion, the main structure of cost, construction schedule, the intrinsic value and so on were analyzed, and ultimately concluded.The above research, through appropriate data processing, obtained conclusions are as follows:1. For the three types of structures in terms of pure frame structure for lateral control capability to be significantly weaker than the steel frame- supporting structure and steel frame- shear wall system, the reason is that the latter two systems were increased support and shear measures such member. Therefore, in the intensity and total building height too large area, it should not be used pure frame structure.2. The calculation and analysis, frame- support and frame- shear wall system in the control layer between displacement curve is relatively flat capability, significantly better than the pure form of a frame. But the maximum story displacement position often appears near the top, suggesting that we should pay more attention to the top displacement control, rather than carrying capacity, can be said that under the influence of strong earthquakes on structures play a decisive role is generally stiffness and stability.3. The steel frame- support system due to the addition of the support member, so that increases the overall stiffness of the structure, At the same time, the support member section should not be set too large, it is energy-intensive process in order to ensure that the support member is preferentially consumed yielding, after preservation beams consumption.4, Due to the shear walls arranged so that steel frame- shear wall system capable of displacement under earthquake overall control structure and role-sharing column base shear strongest. With the increase of the floor, the cylinder force and other parameters indicators changed little overall smooth curve, which makes the optimization of the design of the cylinder during the design process can reduce the cross-sectional area and do not adopt variable cross-section. But it needs to point out that the need for the construction of shear walls wet operations, with the aforementioned two kinds of different structures are completely dry operation, the need for further construction and installation of innovation in order to achieve industrial purposes.5, In contrast to the technical advantages of reinforced concrete structures comprising: light total weight of the steel program, since a long period vibration, axial compression better than the control. Meanwhile, the steel good seismic performance also greatly improve the safety performance of the building. Due to the high strength steel itself, stiffness, so that the cross-sectional area compared with the same conditions for a concrete system, thus increasing the usable floor area of the room from the objective to enhance the headroom.6, In the comparative economic advantages Ganghunjiegou program are: project and more generally for steel processing plant, on-site installation, objectively shorter construction cycle, thus greatly reducing the pressure on their liquidity, while labor costs may be generating savings, which in particular about the economic benefits of today, the advantage is much better than concrete solutions.