Tests for aseismic behavior of prestressed fabricated precast concrete beam-column joints subjected to cyclic loading
HAN Chun1,2,LI Qingning1, JIANG Weishan1,JIAN Haotian1
1. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, China
Here, a new type of fully fabricated prestressed concrete beam and high-strength reinforced concrete column joints with end plate bolting was presented. Tests for selected beam-column joints under cyclic loading were performed. Six prefabricated prestressed fabricated intermediate connection specimens and a cast-in-situ connection specimen were tested comparatively. Performances of the tested specimens were evaluated in terms of failure mode, load- displacement hysteresis curves, skeleton curve, ductility factor, stiffness degradation, and energy dissipation capacity, etc. The results showed that the tested specimens exhibit a strong column-weak beam failure mechanism; the load- displacement hysteresis curves of the prefabricated prestressed fabricated intermediate joints under low cyclic loading are plump, the specimens ductility, energy dissipation capacity and aseismic performance are better, their stiffness degradation rules are similar to each other. The results provided a theoretical basis and a technical support for extending the application of prestressed reinforced concrete frame structures in seismic zones.
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