近年来我国地震频发,自2008年汶川地震至今,六级以上地震多达11次,平均每年近两次。地震对国民经济和人民的生命财产造成了非常大的威胁,多次地震均造成了地面交通瘫痪,桥梁大面积被地震破坏,其中大中桥的落梁是比较常见的震害形式,是应该重点研究和克服的问题。 In recent years, there are frequent earthquakes in our country. Since the Wenchuan earthquake in 2008 up to now, there have been as many as 11 earthquakes of magnitude 6 or above, averaging nearly twice a year. The earthquake posed a very big threat to the national economy and the lives and property of the people. Many earthquakes caused paralysis of traffic on the ground and the large area of ​​the bridge was damaged by earthquakes. The falling of the bridge was the most common form of earthquake damage and should be Focus on research and overcome problems.