Development of Deck System for Two-Girder Bridges

합리화 2주형교용 바닥판의 개발을 위한 실험 연구

The two-girder composite bridge has the girder space of more than 5m, for special case, over than 15m. Therefor, the design and construction of this bridge system require new approaches. To ensure the structural safety, the deck depth should be increased. Therefore, the economically designed deck system is necessary for th two-girder bridge. This study is the first step to develop the deck system for two-girder bridges. In this study, a literatute survey is performed to develop a new deck system for two-girder type of bridges. By considering the characteristics of two-girder bridge system, a cast-in-place PSC deck is proposed for the two-girder bridges. To examine structural behavior and safety of the proposed PSC deck, three real scale partition deck(3m$\times$5m) are tested under the static loading. In the test, the failure mode and behavior of each specimen, and ultimate load carrying capacity of the two-girder-bridge deck are identified.