Research on seismic isolation control of long-span mid-supported CFST arch bridge

Abstract

The seismic problem of long-span arch bridges has attracted great attention at home and abroad in recent years and the technology of seismic isolation provides an effective way for seismic protection of long-span arch bridges. In this article, a practical arch bridge is taken as the object of research. The parameters of the friction pendulum support and buckling-restrained brace are analyzed, and the damping effect of friction pendulum support, buckling-restrained brace and friction pendulum support combined with buckling-restrained brace are compared and analyzed. It turns out that the friction pendulum support and the buckling-restrained brace have a good damping effect on the seismic response of the transverse bridge, and the damping effect on the inward force and displacement response of the arch bridge which applies both friction pendulum support and the buckling-restrained brace is better than that of the bridge which applies the friction pendulum support or buckling-restrained brace alone.