SEVERAL SPECIAL ISSUES REGARDING THE ICE FORCE ON CONICAL STRUCTURES

摘要

The effect of the cone spacing of a conical structure on the ice force is studied by model tests The ice force reduction coefficient presented in this paper expresses the relationship between the ice force and the arrangement of cones. The tests prove that the mode of the ice failure before the boundary of upward-downward bending cone (UDBC) is crushing. A conclusion can also be drawn from the experiments that the ice force on the boundary of UDBC is by far less than that on a vertical pile with the same diameter. Moreover, the ice force frequencies on upright and inverted cones are obtained under the field condition of the platform JZ20-2, respectively. The results show that the alternation of the ice force on UDBC can hardly induce resonance of platform JZ20-2.