Experimental Study On Seismic Performance Of Precast Concrete Frame Edge Node

The general precast frame structure has many advantages, such as, fast construction,less pollution, strong durability, convenient transportation and so on. While except for the advantages which have been mentioned above, unbonded assembled concrete structure also has the following advantages. It has advantages in its strong power of recovery and the small deformation in the residual part, which contribute to the restoration after an earthquake. So this system has a very bright prospect. However, the precast structure system has not been applied widely, and there are still some problems which have not reached in certain conclusions. Hence, it is of great necessity to make a deep research.The experimental research about the seismic performance mainly targeting the boundary node prestressed frame assembly. The experimental designed three edge node frame specimens: one cast-in-place edge node specimen, one boundary node specimen of assembly Angle and one cross boundary node specimen of damper assembly. The experimental tested the three frame specimens with pseudo static method, adopting load-displacement loading system under low cycle cyclic load. After the test, the destruction process of component, hysteresis curves, skeleton curves, displacement ductility, rigidity degeneration and the change of the prestress increment about the anti-seismic property are analyzed. The test results show that the edge nodes of three specimen structure have experienced four stages: elasticity, submission, strengthen and decline.The result of the experiment is consistent with the principles of "strong column weak beam" which was designed at the very beginning. The three common assembly specimens belong to the beam hinge mechanism, in which the final damage of assembly frame specimen mostly focuses in the beam-column joint. After assembling the specimen with a damper, the power of energy dissipation become strong, and the bearing capacity of the specimen is increased. Thus, adding appropriate damping energy dissipation device can improve the seismic performance’s quality of test specimen, and it will has a great application prospect in the high seismic intensity areas.