Study On Numerical Stimulation Of Mechanics Behavior Of Prestressed Concrete-Filled Steel Tubular Beam-Column

The prestressed concrete-filled steel tubulars (PCFST) structure, which is to set prestressing force in CFST members, can develop fully advantages of the steel structure, restricted core concrete, prestressed technique and the space structure etc, enhance the bearing capacity of the structure obviously and enlarge its application scope effectively. On the basis of analysis of the developments of actuality on concrete-filled steel tubulars and prestressed structure both domestic and abroad, this paper develops systemic theory analysis and research on the static behavior of prestressed concrete-filled square steel tubular beam-column by means of the numerical stimulate method.Some works below are carried out:1.In this paper, the writing background, the writing basis and the general situation on the historical study in correlative domain are introduced, the relationship between the study here and the historical study, the actual investigative characteristic, the existent problem and the meaning of the work of the author are showed, the subject of this paper is educed.2.The basal theory of the method of the finite element numerical analysis is expounded by the numbers and its application in the nonlinear analysis of prestressed concrete-filled steel tubular beam-column is achieved.3. Four different types of cable wires are presented, which include centric cable wire, the cable wire in four cornal side, inside cable wire and outside cable wire. The mechanics behavior of prestressed concrete-filled square steel tubular beam-column in four different cable wires are analyzed. The most reasonable type of cable wire is put forward relatively.4. Effects of influence of parameters such as prestressed coefficient, slenderness ratio, sectional steel ratio, load eccentricity ratio, steel yield limit and concrete compressive strength on the limit bearing capacity of prestressed concrete-filled square steel tubular beam-column in the most reasonable type of cable wire are discussed. Then find out the important influencing factor, which lays a theory foundation for the further engineering application.