A rigid-frame arch bridge named Xiaoyudong Bridge received great damage in Wenchuan Earthquake, China, 2:28 p.m. (Beijing time) on May 12
th, 2008. Based on the detailed field survey, the damage condition and the possible mechanisms of failure have been summarized. It has been found that the surface fault had an enormous influence on the damage of A1 and Span 1, while the seismic force made Span 3, Span 4 and Pier 3 failed. Further, pushover analysis has been performed to preliminarily judge the bearing capacity of it. From the result of pushover analysis, the middle span and the bottoms of both inclined legs have been found to be the crucial points of the bridge that the tensile reinforcement might yield from 0.40g horizontal load for them.
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