Analysis Of The Behaviour Of Subassemblage And Prestressed Concrete Frames Under Vertical Loads

Subassemblage and Prestressed concrete frames are 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 are 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,precest beams and columns can be assembled conveniently,and the joints and frame are monolithic and continuous.Consequently,compared with common reinforced concrete frams,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 Subassemblage and Prestressed Concrete Frames,and explores a new way for industrial production of prestressed structures.By analyzing this system,a series of conclusion are provided,incluing modulation of bending moment produced by vertical loads within beam end,secondary internal forces produced by pretress force,shear resistance of the end of beams,the influence of lateral restrains.Theresearch results of this paper are proved to be practical.Some advices are also brought forward on the design process.