The Research Of Stress Performance Of Prestressed Concrete Lfexural Members After High Temperature

The The unbonded prestressed concrete beam as the object, this paper studiedunbonded prestressed concrete structure on fire characteristics and fire after thestress properties, and made the numerical simulation analysis based on ANSYS. atthe same time respectively in the test and numerical simulation on the basis ofanalysis of the effects of prestressed concrete beam stress performance factors.The main contents of this paper include:(1)Take15unbonded prestressed concrete beam under load under hightemperature, and take static loading test after high temperature, until the memberfailure, so as to obtain the residual bearing capacity after fire(2) The test component based on ANSYS numerical simulation, to supplementthe discreteness of the data.(3) Through the test on the high temperature loading different constant load:with different comprehensive reinforcement index: different concrete net protectivelayer thickness effect of high endurance performance factors.(4) Through the numerical simulation of different comprehensive reinforcementindex: different concrete net thickness of protective layer component and withdifferent ratio of height to span members after high temperature mechanicalperformance are analyzed and compared, and the heat capacity decrease degreeanalysis and comparison.(5) Made of prestressed concrete flexural members after high temperatureresidual bearing capacity calculation method.