2015 Volume 15 Issue 7 Pages 7_275-7_283
Most seismic damage of steel railway bridges tends to occur in their bearings, particularly that of skewed bridges. From this fact, it is considered that the acting force to the bearing of the skewed bridge is relatively larger than that of the straight bridge. However, only a few studies focusing on the acting force of the skewed bridge are available. In this paper, static and dynamic analysis of real structures with different structural type, skew angle and span length were conducted in order to clarify the behavior and acting force of bearing. As a result, it was found that the acting force concentrated on the bearing at obtuse corner because of the supplemental acting force caused by the difference of deflection between the two main girders. It was also clarified that the bias of the acting force became larger as the out-of-plane stiffness decreased.
