The Experimental Study And Three-dimension Finite Element Analysis Of The Behavior Of Subassemblage And Prestressed Frame Joints Under Loads

Subassemblage and prestressed concrete frames are assembled by precast prestressed beams and columns, which are made in the factories, with tendons in the joints of the frames. So the joints and frame are monolithic and continuous, Consequently, this kind of frame systems possess higher reliability and solve the problems in the process of assembling, exploring a new way for industrial production of prestressed structures. Based on comprehensive literature research, this dissertation carried out the experimental study and three-dimension finite element analysis of the behavior of subassemblage and prestressed frame joints under loads. The main contents are as follows. By the experiments of two joints under low-reversed cyclic loading, the paper analyzes the failure pattern, energy dissipation, ductility and cracking in the joint cores, evaluates the seismic performances and anti-crack behaviors of the joints, and deduces the anti-crack formula of the subassemblage and prestressed frame joint. Through the finite element analysis software Ansys , the paper analyzes the specimens nonlinearly, and the theoretical analysis results are well consistent with those of the experiment. The research indicates that the subassemblage and prestressed frame joint has good seismic performances and anti-crack behaviors, providing theoretical support and test data for the spreading and appling the subassemblage and prestressed concrete frames in our country.