The Performance Design Method Of Steel Reinforced Concrete Structure

The steel reinforced concrete is a structural style of disposing section steel equipped with certain longitudinal and lateral reinforcement in the concrete, it is one of the main form of steel and concrete composite structure. Steel reinforced concrete structure possesses better stiffness, capacity, ductility, seismic performance and shorter construction period compared with reinforced concrete, while compared with steel structure, it exists better fire and corrosion resistance ability and economic efficiency. With the development of economy and the progress of the society, Steel reinforced concrete structure with its high performance is more and more widely applied in high and ultra-high buildings.This paper reviews the research status of steel reinforced concrete development in both at home and abroad. Based on the example of one high-rise building in Beijing, this paper calculates and analyses the steel reinforced concrete structure and steel reinforced concrete structure respectively with the application of the SATWE software, mainly focuses on the basis of structure scheme selection. Through the calculation of parameters such as maximum lateral displacement and drift, period ratio, stiffness ratio, shear-weight ratio, stiffness weight ratio, maximum base shear and maximum overturning moment, the comparative analysis of the results of the two structural forms is conducted. Corresponding with the design code, it is found that steel reinforced concrete structure exhibits the advantages of relatively lighter weight, better anti-seismic performance, and the bottom column section size decreases nearly25%compared with the reinforced concrete structure which greatly improves the effectively building space, which demonstrates the advantages of steel reinforced concrete structure.The seismic fortification intensity of this project is8degrees, the site classification is III, the building height is135m, on the basis of technical specification for concrete structures of tall buildings, elastic time history analysis under frequent earthquake and elastic-plastic static analysis under rarely earthquake are needed as structural added calculation.Combined with the safety assessment report and the SATWE software, this paper chooses seven seismic waves to conduct the elastic time history analysis under frequent earthquake. The analysis results show that under the seven seismic waves, the average displacement angle, average base shear, average displacement can satisfy the criterion completely, and are less than the calculation results of mode decomposition response spectrum method, so the structure can be on the basis of the calculation results of mode decomposition response spectrum method for structure design.The elastic-plastic static analysis method is used under rarely earthquakes. This paper use the PUSH to analysis the structural response under frequent earthquakes. It is found that structure deformation capacity spectrum can be crossed the demand spectrum, the seismic behavior of the structure satisfies the deformation requirements under the elastic-plastic state, and the displacement angle on the performance point is1/125, which can satisfy the threshold of the criterion, which testifies the rationality of the structural deformation and the feasibility of the scheme.