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论文类型： 期刊论文

发表时间： 2009-05-01

发表刊物： COLD REGIONS SCIENCE AND TECHNOLOGY

收录刊物： SCIE、EI、Scopus

卷号： 56

期号： 2-3

页面范围： 77-83

ISSN号： 0165-232X

关键字： Dynamic ice force; Vertical structure; Physical mechanism; Ice crushing; Ice-structure interaction

摘要： The dynamic ice forces and structure vibrations generated by crushing failure of ice sheet were investigated by full-scale tests conducted on a cylindrical compliant monopod platform in Bohai Bay, China. The load panels recorded three ice force modes distinguished by ice speed, which cause structure quasi-static, steady-state and random vibrations respectively. Based on the tests data, the physical process of dynamic ice forces in crushing failure was probed, by analysis of mechanical behaviour of ice under compressive loading related to relative loading speed of ice-structure interaction. It is proved that the three ice force modes takes place in loading speeds which make ice fail in ductile, ductile-brittle transition and brittle range respectively. In addition, the key problem from the structure design point of view involved in each ice force mode is discussed. (C) 2008 Elsevier B.V. All rights reserved.