Abstract
In recent years, several large rigid frame bridges with piers over 100 meters have been built in mountain regions in China. However, few studies are focused on the influence of the height of piers on the seismic performance of these bridges. Based on the sizes of piers of the existing large continuous rigid frame bridge in the world, finite element models with different pier heights of the bridges are established and dynamic analysis are conducted subjected to three-dimensional multi-support excitation. The seismic response of the structures is studied with the change of pier heights and natural periods. The results show that in actual engineering designs, it is strongly recommended that the adjacent piers with similar heights or very different heights should be avoided. The conclusion also provides suggestion to the design of large rigid frame bridges afterwards.
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