Seismic Behaviour of Cast-In-Situ Phosphogypsum-Reinforced Concrete Grid Frame Composite Walls

Abstract

This paper mainly studies the effect of cast-in-situ phosphogypsum on seismic behaviour of reinforced concrete grid frame. The mechanical behaviour of three reinforced concrete grid frames and four cast-in-situ phosphogypsum-reinforced concrete grid framecompositewallsunderlowcyclealternatingloadwasdesignedandtested.Thetestresultsshowthatthereinforcedconcrete grid frame has less bearing capacity and poor energy consumption. The addition of cast-in-situ phosphogypsum can effectively improve the seismic behaviour of the reinforced concrete grid frame. Compared with the reinforced concrete grid frame, the bearingcapacityofthecast-in-situphosphogypsum-reinforcedconcretegridframecompositewallisincreasedby2-3times,the displacementductilitycoefficientisincreasedby0.95∼1.2times,andtherelativeaccumulativeenergyconsumptionisincreasedby 86%∼216%. This shows that the composite wall has better bearing capacity, ductility, and energy dissipation capacity.