| Compared with the cast-in-place concrete frame structures, Precast Prestressed Concrete Frame structures have the advantages of efficient constructon. Prestressed Concrete Structures use components with high precision and good quality concrete pouring. Currently in Europe, the USA, Japan, New Zealand and other countries, Precast Concrete Frame structures are widely used. Due to the bad seismic performance of precast concrete structures in Tangshan earthquake and the lack of appropriate design guidelines, precast concrete frame structures develops slow in China. In order to promote the use of precast concrete structures in seismic zones, tests of precast Prestressed Concrete frame joints were performed under the financial support provided by Beijing Municipal Science&Technology Commission.This paper two full-scale frame joints were tested under cyclic loading. One is the precast prestressed concrete frame joint, one is the cast-in-place prestressed concrete frame joint. By experiment, seismic performance of two kind of joint was compared. A FEM model also be established in ABAQUS. By changing the axial compression ratio, an ideal axial compression ratio was found to improve the bearing capacity of prestressed concrete frame joint.By testing and finite element analysis, the following conclusions can be obtained:(1) Precast prestressed concrete frame joint have the same bearing capacity and seismic performance with the cast-in-place prestressed concrete frame joint.(2) Precast prestressed concrete frame joint have the same failure mode with the cast-in-place prestressed concrete frame joint.(3) The FEA results are different from the experimental results. The difference of the results are mainly because of the concrete material data.(4) The ideal axial compression ratio is0.35.(5) Precast frame joint can be designed by the cast-in-place prestressed concrete code, the beam stiffness reduction should be taken into account when calculate the joint bearing force. |
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