ROTATIONAL RESPONSE OF SKEWED BRIDGE UNDER STRONG SEISMIC EXCITATIONS

Abstract

 It is well known that skewed bridges tend to rotate and collapse under the strong seismic excitation. This paper clarified the requirement for rotation of skewed bridges including straight bridges considering the gap between a deck and an abutment. Then, deck rotation response of skewed bridges in which the deck can uplift from its bearings is studied. It is shown that the skewed bridges are likely to rotate more extensively, if uplift of the deck from bearings is allowed to occur.