Abstract
This study investigates the seismic performance of a balanced arch bridge using artificial lightweight aggregate (LWA) concrete. Dynamic analysis has been carried out for the bridge using stress-strain model, and properties of LWA concrete obtained from our previous study. In order to compare the use of LWA with normal concrete, different cases were considered. Results showed that a bridge with LWA concrete had seismic performance level 2, while the same bridge with normal concrete failed to perform even level 4. There was a 10% reduction in the number of piles when LWA concrete was used for the whole structure than when used only for arch and piers. It is also possible to reduce the size of bridge members by using the concrete.
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