Seismic Design of Nanchang Chao-yang Bridge

Based on the Chao-yang bridge seismic risk studies, the seismic standards and performance targets were analyzed, and the ground motion input was determined. A full-bridge finite element model was established and nonlinear seismic response of the bridge was analyzed by time history analysis method. Key sections of the main tower and transition piers were checked. Based on the above results, a seismic isolation measure with the cable-sliding friction aseismic bearing (CSFAB) was putted forward, and the results show that this measure can significantly reduce the seismic forces demand of key components and ensure the seismic safety of the structure. Meanwhile, the relative displacement between piers and decks can be controlled by using cables. Furthermore, a 1/20 scale model was tested on shaking table to certify the safety of the bridge seismic isolation design.