Structural Seismic Analysis of Nanning Bridge

Nanning Bridge has its own particularity in seismic analysis. In order to improve the seismic performance of the vulnerable parts of the Bridge, initial research of the Bridge's seismic response was carried out for this project, and for three design methods of expansion joints, different seismic response of the bridge's main span were discussed in this article. It's the conclusion that two additional expansion joints should be set up between the main bridge and the approach bridge so as to separate the seismic response of main bridge from that of the approach bridge in longitudinal direction, and finally reduce the longitudinal seismic response of the main bridge. This conclusion can be referred in the following design of the Bridge.