Cable Surface for the Reduction of Risk Associated with Bridge Cable Ice Accretions

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Cable-supported bridges can suffer from ice and snow accretions that develop in specific weather conditions, predominantly in cold climate regions. As shedding pieces of ice and snow can be of considerable size and weight, they may pose a significant hazard for the traffic below. Numerous anti-icing and de-icing technologies have been tested in laboratories as well as on bridges, but none have proven able to effectively mitigate the risk. Solution durability has also often proven to be lacking. In this paper, a recently developed cable surface that can effectively reduce the risk associated with ice and snow shedding is presented. Experimental results and statistical comparisons between two different cable surfaces in ice shedding tests performed in a climatic wind tunnel are shown. The performance of a conventional, helically-filleted, HDPE stay pipe is compared to that of the innovative stay pipe with a concave-filleted surface. Based on the tests, it is shown that the concave-filleted surface significantly outperforms the contemporary cable surface in terms of the duration for which ice is retained on its surface. This reduces the size and mass of shed ice fragments through prolonged melting, thus reducing the risk associated with it.

TidsskriftStructural Engineering International
Sider (fra-til)425-432
Antal sider8
StatusUdgivet - 2019

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