Earthquake damage Ⅱ

[2165] Evaluation on the Failure Mechanism of a Skew Bridge Damaged in Wenchuan Earthquake

Heng GAO¹, Kenji KOSA¹, Tatsuo SASAKI², Zhongqi SHI¹ (1.九州工業大学 2.大日本コンサルタント)

Keywords:dynamic analysis, failure mechanism, pounding stress, skew bridge

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Maweihe Bridge is a skew bridge damaged in Wenchuan earthquake. The superstructure suffered great residual displacement. Abutments and side blocks were damaged due to the pounding. In order to make clear seismic response and failure mechanism of superstructure, dynamic analysis for the superstructure was conducted. The damage of abutment has been evaluated with the pounding stress as the damage degree is strongly related to it. Besides, it is found that velocity before poundings has a positive correlation with the pounding stress.