Experimental Study On Presressed Assembling Frame Node Additional Angle Steel

The prestressed concrete frame is a prefabricated beam and column in the construction site after hoisting.The prestressed tendons are set aside in the beam column,and the whole assembly type concrete frame is formed after the tensioning of the prestressing tendons. However, the seismic damage of the prefabricated frame is mostly concentrated in the frame column and frame beam, and the security and seismic performance of the whole structure are the most vulnerable part of the frame structure. As a result, it is very important to study the seismic performance of the frame structure for the structural seismic resistance.In this paper, the experimental research on the structure joints of prestressed concrete frame structures is based on the traditional assembly structure system, which is based on the addition of non bonded prestressed assembly unit and auxiliary parts.Through the test of the joints of the reinforced concrete frame and the prestressed concrete frame with the angle steel, the crack distribution, hysteretic curve, skelet on curve, stiffness degradation curve and energy dissipation capacity and ductility coefficient of the prestressed concrete frame joints are studied.The test results show that the occurrence and development of cracks in the prestressed concrete frame structure with angle steel plate are relatively late, and the residual deformation is small, and has good deformation recovery ability. The hysteretic characteristic curve of the assembled joints is full, and has good deformation capacity.The prestressed concrete frame structure with additional angle steel has good seismic performance, and can improve the seismic performance of joints in a certain degree. This kind of node is used in the area of seismic fortification, and it is convenient for the factory to manufacture, and the construction is convenient, and has a broad application prospect.