Asismic Analysis On Frame-bent And End Shear Wall Structure Of Large Scale Power Plant In High Earthquake Intensity Zone

The damage caused by earthquakes at home and abroad indicates that R.C. structures will suffer failure and even collapse under medium or strong earthquakes, caused by great loss of economy and casualty. With the development of economy, one hand, the single pc capacity of power plants are increasing; the other hand, the main buildings in large-scale thermal power plants are a sort of important engineering, and should have better seismic behavior. Investigate on seismic behaviors of this kind of structures is of importance on practical and theoretical values. The purpose of this paper as follow: clear the basic stress properties and rules of large capacity units of major powerhouse structural systems of thermal power plants; know the structure design problems of frame-bent structure; point out the suitability of traditional frame- bent structure in higher intensity area.A number of technical parameters wer refered to 1000 MW unit in this paper,for example, Column layout Network, Process and the load location, size. With the structure character, SAP2000 finite element software was used to analysis the frame-bent and end shearwall structure of large scale power plants.First, know the stress performance and weakness location etc of traditional frame-bent structure according to investigate on it. Second, with the structure character, the structural modal is analyzed by the finite element program SAP2000; Internal Force Calculation for frame-bent structure under dead load,live load,wind load and snow load; Response spectrum analysis; structure mechanical properties: Bearing Capacity,stress characteristics,deformation characteristics and weakness location; Time-history analysis, including transfer mechanism, frame and bent,cooperative working condition between shearwall, the time-history analysis results were compared with response spectrum analysis results, whether the conclusions of response spectrum analysis are reasonable or not. Set up the plane model of main powerhouse frame-bent hybrid structure to calculate, compared with the results of space model and then give a reasonable design method; The paper analyze the main powerhouse frame-bent mixed structure under dead live wind load, then do load Effect Combination according to standard. Finally, conclude the conclusion of computation, it is indicate that the applicability of this kind of structure in highly seismic region.