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• PRC 보- 기둥 접합부의 내진성능

– 저자 :  송진아, 박홍근, 이창남, 엄태성

Prefabricated reinforced concrete (PRC) uses prefabricated re-bars for fast construction and cost-saving. In the present study, prefabricated re-bar details for beam-column connection were developed. Cyclic loading tests were performed to evaluate the earthquake resistance of interior and exterior beam-column connections. The beam-column connections were designed in full scale to satisfy the requirements of the special moment frame specified in KCI 2007 and ACI 318-08. For the PRC method, re-bar welding, coupler splice, headed bar anchorage, and high strength steel (SD500W) were used in the specimens. Test results showed that the PRC connections showed deformation capacity greater than the minimum story drift ratio of the special moment frame, 3.5 %, specified in ACI 374.1-05. The load-carrying capacity, yield stiffness, and energy dissipation capacity of the PRC connections were comparable to those of conventional reinforced concrete connection. The major failure modes of the PRC connections were flexural crushing of concrete and re-bar fracture at the beam plastic hinge region. The re-bar welding and coupler splice did not significantly affect the performance of the specimens.