Study Of The Sesmic Response Of Steel-Fiber Prestressed Concrete Flat-Beam Frame Structure By Pseudo-Dynamic Test

Recently, the unbonded partially prestressed concrete flat-beam structures are widely beingused due to reducing the floor height and total height efficiently, cutting down the internalforce of structures caused by wind load and seismic effect and economizing the costs.But the aseismatic study of this kind of structure is not perfect at present and study ontheory is lagged behind the demand of engineering apply. It has important theoreticmeaning and applied value to go deep into the study about this kind of structures andmake it secure when encountering the earthquake. This thesis sums up the study of the reinforced concrete flat-beam framestructures, pseudo-dynamic test, the steel-fiber concrete and generalizes theperformance of the steel-fiber concrete and its influence to the seismic resistance ofthe frame. Based on the previous research results, the test study on pseudo-dynamictest of three monolayer and single-stride prestressed concrete flat-beam framestructures are mostly carried through. The pseudo-dynamic test of three frames withthe same size and the same intension grade are conducted. One frame is made ofordinaryconcrete and the other two are made of steel-fiber concrete. The difference ofthe aseismatic behaviors of the three frames is analyzed and compared, with emphaseson the development and variety of crack, stiffness degeneration, the difference ofacceleration, displacement and energy-dissipation capacity, to find the influence ofsteel-fiber concrete to the aseismatic behaviors of the prestressed concrete flat-beamframe structures.　　 After the pseudo-dynamic test, the low-cyclic reversed loading tests of the threeframes are carried out. The emphases of study are on failure mechanism, hystereticproperty, displacement ductility, energy-dissipation capacity and stiffnessdegenerationof the three damaged frames. The results show, when steel-fiber concrete is used in the flat-beam framestructures, the prestressed concrete flat-beam frames can have the more satisfiableaseismatic behaviors. When designed rationally, the frames can form beam hingeenergy-dissipation machine and total destroy mechanism. The structural system has IIconsiderable energy-dissipation capacity and the strong seismic resistance behavior,so can be generalized and used in medium seismic zones. This fruit of the study canprovides new methods to the supplement of concerned criterion and the design aboutthe flat-beam frame structure...