Study On Sesimic Behavior Of Recycled Aggregate Concrete Filled Square Steel Tube Column

The recycled aggregate concrete filled steel tubular (RACFT) columns is a new type steel-concrete structure with good mechanical properties and decreased building rubbish.The study on the seismic performance of RACFT is not enough, but our country is prone to earthquake, so it have great reality significance to study the seismic performance of RACFT.The main contents includes:Study the influence of reinforcement ratio, strength, slenderness ratio and construction measures on seismic performance by analysis the destruction process of RACFT, hysteresis curves, ductility, energy dissipation, stiffness and strength; Simulate the specimen with finite element software ABAQUS, analysis the effect of reinforcement ratio on seismic performance in different strengths and steel ratios.Research indicates that:The RACFT have good seismic performance and reinforcement ratio make no difference on seismic performance. Reduce slenderness ratio can improve its seismic performance. Increase strength can improve bearing capacity but it also can weaken ductility and energy dissipation. Spiral stirrup in zocle can improve its seismic performance. There is no effect on the seismic performance The effect of reinforcement ratio on seismic performance have nothing to do with strength and steel ratio.