Author(s): Li Feng; Yue Qianjin; Bi Xiangjum
Linked Author(s):
Keywords: Ice load; Conical structures; Velocity effect; Qualitative analysis
Abstract: This paper first reviews different patterns of velocity effect observed from full-scale tests as well as model tests. A supposition of failure mode domination is induced according to the interrelation of amplitude vs. period of ice force, because of increment of ice force always related with alteration of breaking length. Secondly, by means of static ice force analysis, it is proved that failure load of ice sheet gets great or less under two different bending mode respectively along with decreasing breaking length. Finally, a numerical test is made by FEM which shows breaking length of ice beam monotonous decrease along with increasing impact velocity at the front end of the beam. Sum up above aspects, it conclude that velocity effect of ice force on narrow conical structures reflects transition of failure mode to a great extent.
Year: 2004