NUMERICAL DERIVATION OF IMPACT FORCE ON BRIDGE PIERS FROM A BARGE IMPACT
Vessel collision with bridge pier is one of the most frequent accidents that may lead to bridge failure. The serious consequences with respect to financial losses and casualties necessitate the study of vessel-pier collision. To reliably assess bridge response and damage due to barge impact,and design the bridge piers to resist such impact,the impact force should be accurately defined. In some of the previous works of barge impact on bridge piers,the pier was assumed to be rigid to reduce the computation effort. The interaction between the barge and the pier,as well as the bridge structure was neglected. In this paper,a detailed numerical model of barge-pier impact is developed using the software package LS-DYNA. The bridge pier is modelled with nonlinear concrete and steel materials to generate the more realistic bridge pier characteristics. The model is calibrated with some results available in the literature. Then a series of simulations are carried out with different barge and bridge properties to calculate the impact forces. The derived impact forces are compared with those specified in bridge design code. The adequacy of the code values is discussed. Parametric studies are carried out to investigate the influence of the bridge-pier mass ratio on three parameters:Pm (the maximum impact force),tm (rise time of the maximum impact force) and td (the impact force duration).
barge-pier collision impact force mass ratio time duration
Yan-Yan Sha Hong Hao
School of Civil and Resource Engineering,the University of Western Australia,35 Stirling Highway,Crawley WA 6009,Australia
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
1625-1630
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）