ABSTRACT
Curved rigid-frame bridges used in interchanges and junctions play important roles in urban highway networks. Seismic safety of curved bridges is important as these networks are often used for transportation of relief materials and evacuation after earthquakes. The objective bridge of this study is the Ohashi Junction connection viaducts, which is a two layer rigid frame curved bridge which has large curvature. A three dimensional nonlinear frame model is constructed based on the design and calibrated with traffic vibration measurement. Dynamic analysis of the model is then conducted to clarify the response dependency on input direction, effect of pounding, and safety of attachments.
