Study On Method Of Seismic Damage Control Design Based On Displacement & Energy Of RC Frame Buildings

The philosophy and methodology of performance-based seismic design (PBSD) has been an extensive topic discussed by earthquake engineering experts at home and abroad. With the development of the PBSD, more and more researcher think that if displacement and energy be taken for the seismic performance index together, the performance of frame structure can be evaluated more completely and accurately.In this paper, displacement-based seismic design, energy-based seismic design and damage performance-based design are analyzed, and the merit and fault of three methods are discussed by taking into account the methods of seismic design in current code. On the basis of these analysis, a method of seismic damage performance control design is proposed in terms of current code. According to this method, the influence of displacement and energy are considered by using the two-parameter seismic damage model. A 4-stories frame structure is designed by this method to test the method would be reasonable or not, and compared to which designed by ways of current code. The example shows that the structure which designed according to current code not always meet seismic damage performance, so it is necessary to analyze seismic damage performance of structures especially when the buildings are seated in high earthquake intensity area.Calculation procedure using time history analysis method to study nonlinear structural earthquake reaction is introduced in details in this paper. Applying ETABS finite element analysis program, the elastic-plastic time history analysis of the frame buildings are completed and some displacement reaction curve are obtained, which shown that the design method presented in the paper is feasible.