In this study, shake table tests were performed on a bridge-abutment system consisting of a straight, $30^$ bridge was about 2.6 times the longitudinal displacement of the straight, which was greatly over the limit suggested by the NZTA of 1.25 times. To date, not many experimental works have been done on this topic, especially those including pounding between adjacent structures. Researchers have found that the in-plane rotation of the girders was one of the main reasons for the vulnerability of these types of bridges.
The seismic vulnerability of skewed bridges had been observed in many past earthquakes.
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