The Investigation On The Characteristic Of Energy Dissipation And Damaged Accumulation For The Prestressed Concrete Frame Beams

With the technology development of the prestressed concrete, the prestressed concrete(PC) frame structures are widely used in large-spanned multi-storey buildings due to its excellent crack resistance and durability. However, there is a lot controversy for its application in the earthquake area for the short application history of the prestressed frame structure, the less experience in the engineering seismic calamity, and the relatively less systemic research on its seismic behaviour even though the specialists in world wide make a graet deal study on it. Therefore, to investigate the seismic behaviour of the prestressed concrete frame, it exists the significant academic meaning and application value for our country where seism happens a lot.This article based on the research of other specialists, combining the project Seismic Analysis Optimizer of the Prestressed Concrete Frame of the fund for the scholars who study and return form abroad, choosing the normal prestressed beam in which the single side prestressed tendon is deployed as the research objects, making the low-cyclic reversed loading tests for the precast concrete members, investing the character of the energy dissipation, stiffness degeneration, and the curve of failure load, provides the restoring force model for the engineers programming the prestressed concrete structures.Based on the seismic behaviour of the prestressed concrete frame beam, it explores the parts below:1. The research of the seismic behaviour of the normal beams where the single side prestressed tendon is deployed, says the ability of energy dissipation for the distinct members under the different earthquake models and the impact of the energy dissipation, bearing capacity, rigidity, and ultimate bearing capacity of members forthe spacing of stirrups under the different earthquake models. 2.By designing the loading history(procedure), it simulates not only the generalprogress of the growing earthquake action, but the different declining progressafter the peak earthquake action so as to learn about the hysteretic behavior on thedifferent seismic action, especially the failure character. 3.Not only obtaining the general character number of the restoring force model ofthe members, but ascertaining the declining coefficient of bearing capacity, thestiffness degenerate of unloading curve, and the failure curve on the differentductility factors.The research shows that the seismic behavior of the prestressed concrete beam of the appropriate spacing of stirrups and the degree of prestress is closed to that of the common reinforced concrete beams and it can be applied in the seismic area of middling intensity. Meanwhile, the restoring force model in this article can reflect the energy dissipation and bearing capacity decline of the members on the distinct earthquake model and put forward the failure load curve of the prestressed concrete beams.