Analysis on Earthquake Damage of Daxinglu Ramp Bridge in Wenchuan Earthquake

Abstract:

Although located in the very low intensity area, the superstructure of Daxinglu Ramp Bridge sustained huge damage in Wenchuan earthquake. The longitudinal displacement of superstructure at the joint was about 400mm, which outdistanced the average displacement of all the other bridges in this area. In this paper, finite element model of the ramp bridge is made by general FEA software and the damage of the ramp bridge is analyzed by using nonlinear dynamic time history method. The results are obtained as follow: (1) the displacements restriction capacity of bearing system is reduced greatly by setting too many movable pot rubber bearings in the bridge. (2) The earthquake record near the bridge site is a typical long period ground motion. The extended natural period of the damaged bridge absorbed more but not less energy from the long period ground motion, which aggravated the damage.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 1003-1006
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.1003
• Online since: May 2011
• Authors: Guo Hui Zhao, Yu Min Zhang
• Keywords: Bearing System, Long Period Ground Motion, Nonlinear Dynamic Time History Method, Ramp Bridge, Wenchuan Earthquake

References

[1] Hou Guangwei, Ning Heping. Railway Construction. Vol. 49 (2009), p.33.

[2] Chongqing Communications Research &Design Institute. Guidelines for Resistant Design for highway Bridges (JTG/T B02-01-2008). (China Communications Press, Beijing 2008).

[3] Xu Yang, Luo Cijian, Li Xiaojun, et al. Technology for Earthquake Disaster Prevention. Vol. 4(2009), p.363.

[4] Zhao Guohui, Liu Jianxin, Chen Changhai, et al. Bridge Construction. Vol. 39 (2009), p.50.

[5] Wu Di, Lup Qifeng, Luo Yongfeng. Journal of Seismological Research. Vol. 30 (2007), p.296.