Abstract
Response of curved rigid-frame bridges changes depending on the input direction of ground motion. Curved bridges need one directional ground motion to be applied multiple times assuming variety of input directions. In design practice, however, the number of input directions is often limited. Thus maximum response can be underestimated. and pounding can be occurred. In addition, even if main structure does not damage, transportation function can be lost because of the collapse of non-structural components.
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 directions, effect of pounding, and safety of attachments.
