Deck-pier connection detail for the simple for dead load and continuous for live load bridge system in seismic regions

The steel bridge system referred to as Simple for Dead Load and Continuous for Live Load (SDCL) has gained popularity in non-seismic regions of the United States of America. The system provides enhanced service life and lower inspection and maintenance costs as compared to conventional steel systems. To-date, no research studies have been carried out to evaluate the behavior of the SDCL steel bridge system in high seismic regions. The SDCL concept for seismic regions requires a suitable connection between the girder and pier. The research presented in this paper investigates an integral pier SDCL steel bridge system. The structural behavior and force resistance mechanism of a proposed seismic detail was evaluated through an analytical study. An equation was developed to predict the ultimate connection capacity under seismic loading. This paper presents the results of Phase I of an ongoing, three-phase effort, that will culminate in the development of a set of details and associated design provisions to develop a version of the SDCL steel bridge system suitable for use in high seismic regions.