Experimental Study And Analysis Of Prestressed Subassemblage Concrete Frame On Moment Modification

Prestressed Subassemblage concrete frame is assembled by precast prestressed beams and columns with tendons in the joints of the frames. These beams and columns are hoisted in site and the tendons are passed through the moire' pipes. So prestressing force is brought to the joints of the frame. These tendons also can assume the moments at the end of the beams in ordinary condition. By way of these tendons, precast beams and columns can be assembled conveniently, and the joints and frame are monolithic and continuous. Consequently, compared with common reinforced concrete frames, this kind of frame systems possess higher reliability and solved the problems in the process of assembling Prestressed Concrete frames. Also it forms the framework of Prestressed Subassemblage concrete frame, and explores a new way for industrial production of prestressed structures.Two specimens of prestressed fabricated frames subassembly were tested under reversed cyclic load. Experimental studies were carried out to investigate the frame's ductility; redistribution of internal force, as well as the influence of secondary internal force's produced by pretressed force. Based on experimental data and research literatures at home and abroad, obtains a function of moment modification coefficient about Subassemblage and Prestessed concrete frames. Finally, based on the conclusion of this paper, some reasonable and applicable advises are brought forward.