Pushover Analysis And Optimization Design Of Large Thermal Power Plant Frame Structure

Because of the special requirements for technology arrangement and using features, the deaeration coal-bunker bays of large thermal power plant is imposed on heavy vertical loads. The transversal spans of the plant is very large, components in ground floor are the weak components, the comparison of linear stiffness between bean and column is usually high, seismic performance is not good. This article base on a deaeration coal-bunker bays of large thermal power prestress plant, use Push-Over Method to analyze the seismic performance, combined with others Pseudo-static test result, give out some optimization design suggestions for structure design and the possible of different kinds of structures used in large thermal power plant. The main research work of this article includes:(1) Based on Pseudo-static test of a large thermal power prestress plant, use Push-Over Method to build the computer Pseudo-static test model. Compared the result of Pseudo-static test and Push-Over analyze. The two results have high similarity in seismic performance evaluation indexes, such as:lateral displacement, the position and formation process of plastic hinges.Proved that the Push-Over analyze is a workable analyze Method.(2) combined with the results of high strength concrete thermal power plant column Pseudo-static test, use the form and distribution ratio of stirrup which have been tested for high strength concrete column. Give out an improvement scheme to decreased axial compression ratio of the column. Build another computer Push-Over analysis model with high strength concrete column, compared result with the Pseudo-static test Push-Over analysis model. Demonstration the possibility of the high strength concrete used in thermal power plant.(3) Build the computer analysis model of the thermal power Prestress plant. Calculate the control load for each component and the elastic deformation. Use Push-Over Method to analyze lateral displacement, the position and formation process of plastic hinges, and the final failure model.(4) Combined with the results of steel reinforced concrete analysis results, based on related design code to design a new steel reinforced concrete thermal power plant. Improved the deformation capacity, decrease the section and dead weight. Build computer Push-Over analysis model with steel reinforced concrete, compared result with the thermal power Prestress plant. Demonstration the possibility of the steel reinforced concrete used in thermal power plant.Compared the Push-Over analysis result of different kinds of thermal power plant, earthquake resistant feature, points out the weak link of the thermal power plant, and give some results which is valuable for structure design...