Seismic Behavior Analysis of Recycled Aggregate Concrete-filled Steel Tube Column

Abstract

To investigate the seismic behavior of recycled aggregate concrete-filled circular steel tube (C-RACFST), twenty-three full-scale specimens were tested by changing the design parameters. Seismic behavior indices, such as hysteresis curve, skeleton curve, ductility coefficient, and energy dissipation capacity were analyzed and the influence rules of design parameters on seismic behavior index were revealed. Results show that it is feasible to apply C-RACFST to the actual load-bearing structure based on the seismic behavior index requirements. With the increase of the steel ratio, the hysteresis curve become plumper, and the peak-bearing capacity and displacement ductility coefficient increase. With the increase of the axial compression ratio, the peak-bearing capacity and ductility decrease and the energy dissipation coefficient of each specimen increases gradually under the same cycle displacement. The conclusions obtained in the study are of reference value to direct the similar engineering.

D‐Shaped Concrete‐Filled Steel Tube Structure in Bridge Engineering

“…After calculating the axial force and bending moment of each unit, the entire section is integrated to obtain the internal force of the section. On the basis of satisfying the balance of internal and external forces, the ultimate stability bearing capacity of the component is finally obtained by the iterative method [22,23]. is study first introduced the structural models of steel and concrete used and then explained the calculation principle and calculation process of the fiber model method.…”