Seismic Analysis of CFST Through Arch Bridge: A Review

Abstract

Concrete filled steel tubular arch bridges are being constructed in developed countries mainly for roads and railway lines. The CFST arch bridges use steel tubular arches in-filled with self consolidating concrete. The steel tube provides confinement as well as serves as formwork to the concrete infill. Extensive studies have shown that these concrete filled steel tubes have improved ductility, good performance under seismic loads, reduction in materials and self weight, speedy construction and small vibrations. The steel tube delays local buckling of arch and reduces the ingress of moisture into the concrete when exposed to harsh environmental conditions. The effect of seismic loading on the CFST bridge is to be investigated in terms of deflection and stress so as to implement the same in earthquake prone regions without significant damage. This paper aims to compare the seismic resistance of CFST bridges when compared to conventional RCC and steel bridges.