Study on Seismic Performance of RPC Shear Walls with Hybrid Reinforcement
Abstract
In order to create a reinforced concrete shear wall structure with good energy dissipation and resilience，a kind of ultra-high performance concrete RPC （Reactive Powder Concrete） shear wall structure composed of ordinary reinforcement and CFRP （Carbon Fiber Reinforced Polymers） was presented. A nonlinear finite element model using nonlinear finite element software DIANA was established to analyze the seismic performance of reinforced concrete shear walls. The applicability of the model was verified by the test results in this paper and other references. Based on the constructed model，the seismic behavior of normal concrete and RPC shear walls with different reinforcement types was analyzed. The results showed that，in terms of the analyzed situation，the ductility coefficient of reinforced RPC shear wall was increased by 42% when compared with that of reinforced concrete shear wall due to the better ductility of RPC material. Compared with reinforced concrete shear wall，the energy dissipation capacity of RPC shear wall reinforced with CFRP bars for wall and ordinary reinforcement for side columns was increased by 51%，the ductility coefficient was increased by 30%，and the self-resetting capacity coefficient was increased by 25%. It is verified that the proposed hybrid reinforced RPC shear wall structure system has good comprehensive seismic performance. The reinforcement ratio of CFRP longitudinal reinforcement in shear walls with mixed reinforcement should be between 0.5 and 1.0 of ordinary longitudinal reinforcement in side columns.
Keywords: reactive powder concrete (RPC), carbon fiber reinforced polymer (CFRP), shearwall finite element analysis, seismic performance
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