Analysis Of Seismic Performance Of High-rise Building With Cast-in-situ Concrete Hollow Floor Structure

Over the recent years, earthquakes happened frequently everywhere in China,which has brought serious disasters to people ’ s lives and made people pay much attention to the safety of the building structure of their living and working environment. As a new type of structure system,the cast-in-situ concrete hollow floor structure is widely used in high-rise buildings. It not only can meet the needs of many aspects of contemporary people in the room using function,but also has the advantages of light weight, large span, high clearance, cost saving, fast construction etc. But the current research on seismic performance of cast-in-situ concrete hollow floor in high-rise buildings is not perfect, especially in the influence on the seismic behavior of the approximate calculation of hollow floor, lacking of comprehensive and systematic understanding. In order to understand the seismic performance of high-rise hollow floor structure under seismic action, to improve the ability of high-rise hollow floor structure resisting the earthquake disaster, the paper analyzes and studies the seismic performance of cast-in-situ concrete hollow floor in high-rise structure.Main research work and achievements are as follows:Establish finite element analysis model. According to a high-rise structure with cast-in-situ concrete hollow floor, establish finite element analysis model by the finite element analysis software of Strat.Response spectrum analysis on the cast-in-situ concrete hollow floor structure. Compared with the equal- stiffness plate-column structure with hollow floor structure and ordinary floor structure in the aspects of the storey drift, the storey drift angle, the self vibration period and the base shear force, etc. Find that in the same conditions, the seismic performance of hollow floor structure is better than the other two types of structure.Elastic time history analysis and elastic-plastic time history analysis on the cast-in-situ concrete hollow floor structure.Comparing the result of time history analysis under earthquake and CQC,the result reveal that the structural base shear come out by time-history method larger than CQC method,which means it must adjust the internal force and reinforcement components in the design.in addition,according to the result,it comfirmed the accuracy of structual modeling and compuyational analysis,at the same time,it also comfirmed the plastic interlayer displacement angle of stucture fit the specification requirement of the related national standards and norms, and found same weak link in the substructure.Finally, based on the analysis of the results of the above calculation, summarize the stress characteristics and the seismic key parts of the hollow floor structure, and put forward the seismic measures, and then lists and analyzes the specific seismic measures of hollow floor structure in the specification and Atlas.