Highly seismic-resistant new type bridge taking advantage ofgeosynthetic-reinoforced soil

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The conventional type bridge, which comprises a girder supported with a pair of cantilever-type abutments via shoes and unreinforced backfill, tends to be massive while the seismic stability is relative low and the long-term maintenance cost is relatively high. To alleviate these problems, a new type bridge (called GRS integral bridge) is proposed. The new type bridge comprises a continuous girder integrated to a pair of abutments without using shoes while the backfill is reinforced with a geosynthetic reinforcement connected to the abutment. By performing a series of model static and dynamic loading tests and numerical analysis, it is confirmed that this new type bridge is much more cost-effective exhibiting substantially higher seismic stability, long-term higher performance and higher constructability than the conventional type bridge.