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Typical Bridge Damage Analysis in “5·12” Wenchuan Earthquake(PDF)


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Typical Bridge Damage Analysis in “5·12” Wenchuan Earthquake
LIU Jian-xin ZHAO Guo-hui
Key Laboratory of Bridge and Tunnel of Shaanxi Province, Chang'an University, Xi'an 710064, Shaanxi, China
bridge engineering “5·12” Wenchuan Earthquake bridge damage earthquake source mechanism seismic fortification
According to the highway bridges severely damaged in “5·12” Wenchuan Earthquake, there was significant difference in damage style between south and north part of the Yingxiu-Beichuan fault, Sichuan Province. The reason was analyzed from several aspects, such as earthquake source mechanism, movement style of the fault and characteristic of the bridge structure. Some suggestions in seismic fortification for girder bridges and arch bridges were given on the basis of the typical bridge damage analysis in “5·12” Wenchuan Earthquake of Sichuan Province. The results show that because of the huge energy and faults thrust in south part, structures sustain huge vertical and horizontal seismic forces at the same time, the damage style of the highway bridges is strength failure, such as collapse caused by rupture of piers or arch rib. While in the north part of the fault, because of the huge right lateral strike slip and the weak thrust, the damage style is displacement failure, such as collapse of the superstructures or the two-way curved arch bridges.


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Last Update: 2009-06-20