Experiment on seismic performance of concrete filled steel tubular arch-rib under multi-shaking-tables

In addition, the testing indicates that the CFST arch-rib structure has performed the nonlinear and plastic behavior especially under intensive excitations of El-centro wave and Hanshin wave. However, the natural frequencies or stiffness of the CFST arch-rib model don't have significant decrease and there is no distinct crack or damage on the steel surface because of the hooping effect on the core concrete. This indicates that the CFST arch-rib structure has a favorable seismic behavior and ductility.