Dynamic reliability assessment for long-span bridges under vehicle load

被引：0
作者：
Lu N.-W. [1 ]
Luo Y. [2 ]
Wang Q.-Y. [2 ]
Mohammad N. [1 ]
机构：
[1] School of Civil Engineering, Southeast University, Nanjing
[2] School of Civil and Architecture Engineering, Changsha University of Science and Technology, Changsha
来源：
Zhejiang Daxue Xuebao (Gongxue Ban) | / 12卷 / 2328-2335期
关键词：
Dynamic reliability; Root-mean-square; Stochastic traffic flow; Suspension bridge; Vehicle-bridge couple vibration; Weigh-in-motion first-passage;
D O I：
10.3785/j-.issn.1008-973X.2016.12.012
中图分类号：
学科分类号：
摘要：
The dynamic reliability of a suspension bridge under three types of stochastic traffic flow loads were analyzed in order to evaluate the serviceability of long-span bridges under traffic flow loads. The stochastic traffic flows were ebtabilished based on the site-specific traffic measurements of a highway. The bridge dynamic responses were calculated by utilizing vehicle-bridge couple vibration approach. In addition, the failure proability was estimated by the first-passage criterition. Finally, the influence of busy traffic flow occupacy ratio on the reliability of the bridge was investigated. Numerical results indicate that the maximum mean value of the dynamic response of girder is in the mid-span point of the suspension bridge, while that of the root-mean square is in the quarter-span point; the serviceability reliability of the long-span bridge in service, Which is caused by up-crossing failure of displacement, is associated with the occupancy ratio of busy traffic flows. The stochastic traffic flow load model is appropriate for probabilistic modeling of the dynamic responses of long-span bridges, since the statistics of traffic flows are involved in the load model. Furthermore, the stochastic traffic flow load model has a potential feasibility for dynamic reliability assessment for long-span bridges. © 2016, Zhejiang University Press. All right reserved.
引用
收藏
页码：2328 / 2335
页数：7
相关论文
共 19 条
  • [1] Deng L., Wang W., Yu Y., State-of-the-art review on the causes and mechanisms of bridge collapse, Journal of Performance of Constructed Facilities, 30, 2, (2016)
  • [2] Bu J., Law S., Zhu X., Innovative bridge condition assessment from dynamic response of a passing vehicle, Journal of Engineering Mechanics, 132, 12, pp. 1372-1379, (2006)
  • [3] Chen S., Wu J., Dynamic performance simulation of long-span bridge under combined loads of stochastic traffic and wind, Journal of Bridge Engineering, 15, 3, pp. 219-230, (2009)
  • [4] Han W.-S., Yan J.-Y., Wu J., Et al., Extra-heavy truck load features and bridge dynamic response based on long-term traffic monitoring record, China Journal of Highway and Transport, 27, 2, pp. 54-61, (2014)
  • [5] Camara A., Nguyen K., Ruiz-Teran A., Et al., Serviceability limit state of vibrations in under-deck cable-stayed bridges accounting for vehicle-structure interaction, Engineering Structures, 61, pp. 61-72, (2014)
  • [6] Xiang T., Zhao R., Xu T., Reliability evaluation of vehicle-bridge dynamic interaction, Journal of Structural Engineering, 133, 8, pp. 1092-1099, (2007)
  • [7] Ettefagh M., Behkamkia D., Pedrammehr S., Et al., Reliability analysis of the bridge dynamicresponse in a stochastic vehicle-bridge interaction, KSCE Journal of Civil Engineering, 19, 1, pp. 220-232, (2015)
  • [8] Meng Y.-J., Zhou X.-Y., A long-span old bridge's dynamic reliability under vehicular load, Journal of Vibration and Shock, 32, 11, pp. 155-160, (2013)
  • [9] Jia B.-Y., Yu X.-L., Yan Q.-S., Et al., Bridge seismic reliability analysis based on improved Kriging response surface method, Journal of Vibration and Shock, 32, 16, pp. 82-87, (2013)
  • [10] Han W., Yuan S., Ma L., Vibration of vehicle-bridge coupling system with measured correlated road surface roughness, Structural Engineering and Mechanics, 51, 2, pp. 315-331, (2014)
12