Study On Calculation Method Of Seismic Action Of Concrete Frame Structure

With the development of science and technology innovation, concrete frame structur es seismic has attracted more and more attention, through the analysis of earthquake actio n of concrete frame structure calculation method research to understand development of e arthquake, damage to the structure, focus on three common seismic calculation method, t o provide better seismic design theory.This article is divided into six chapters, chapter 1 mainly illuminates the research background, significance and content, this paper introduces the development of concrete frame structures and the application of the existing building, which leads to the seismic action for the influence of modern life, and for the destruction of concrete frame structures, the purpose of this study are put forward. The second chapter mainly introduces three kinds of seismic action calculation method, the bottom shear method, response spectrum method and time history analysis method, introducing the conditions, scope and means of the three methods, this paper makes a further research, from the source of the method, analysis is derived. The use of the several methods makes a theoretical support for the following chapters. The third chapter is mainly established a ten layer frame model, the real modal analysis model, understanding the basic dynamic characteristics of structure, and through the theoretical calculation of the bottom shear method to calculate results. Then use the SAP2000 analysis software, by using response spectrum analysis the concrete data of the model.The fourth chapter mainly works the time history analysis method based on the mode settled, inputting the five kinds of different waveforms, focus on the comparative analysis of different models under the circumstance of displacement, velocity, acceleration and internal force of the change of the data, by curve, intuitive, in the form of table. The fifth chapter is mainly in the first few results based on the comparison between the pros and cons of three kinds of calculation method of seismic action, as well as application scope, the corresponding conclusions. Sixth chapter mainly elaborated in this paper, a general conclusion, further put forward the need to study the problem.Analyses in this paper, we study, the results show that the frame structure of three kinds of method to compute the seismic action, the bottom shear method is the most simple but old-fashioned, Only used for manual calculation. Clarity of response spectrum method, which has been widely applied, but with the maximum acceleration response not considering other factors, only depending on the response spectrum statistical mode, so the results is inaccurate. The most accurate practical should be too routine analysis, but the computation results of different seismic wave has certain regularity, namely when the natural vibration period of buildings and ground soil predominant period approaches, its seismic response is big, the calculation results is big, when the natural vibration period of buildings and ground soil area is different from that of predominant period, its seismic response is small, the calculation results is small. Therefore, in the structural design should fully consider the site predominant period and when natural vibration period, the relationship between avoiding resonance phenomenon.