NONLINEAR FINITE ELEMENT ANALYSIS OF BARGE IMPACT WITH BRIDGE PIERS
Bridges across navigable waterways must be designed to resist potential vessel impacts. However,researches on the vessel-bridge collision force and bridge pier dynamic response are quite limited. Current practice in generating the impact force time history is primarily based on the empirical formulae from limited experiments or the finite element simulation results. In the previous studies,in order to simplify the complicity of material and geometrical nonlinearities,bridge piers were mainly modelled with rigid or elastic materials,which ignored the nonlinearity of the concrete and steel reinforcements and might lead to inaccurate results. In this paper,material nonlinearity is considered during the barge-pier impact. The barge and reinforced concrete bridge pier are modelled with the dynamic finite element code LSDYNA. Concrete is modelled using the material model 72Rel3 which is widely employed to model the dynamic behaviours of concrete and can model plasticity and damage softening after failure. Barge crush depth is also investigated through the deformation of the shell element in the area of barge bow. The simulation results are compared with those obtained with the rigid and elastic pier assumptions. Parametric study is also carried out to investigate the effects of barge velocity and mass on the impact force. The finite element simulation results are compared with the current AASHTO specifications. The adequacy of the code specification is discussed.
Barge-pier Impact Impact force Crush depth
Yan-Yan Sha Hong Hao
School of Civil and Resource Engineering,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
1619-1624
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）