Abstract
Ice load is a major design criterion of tall towers.
International Standard ISO 12494 gives a method to assess
ice loads and combined ice and wind loads on complex
structures by Ice Classes. The method has not been
directly verified, however. Here, we present an analysis
of the applicability of the ISO method based on field
data on rime icing. The data include ice amounts
simultaneously measured on the ISO Standard ice
collector, a 7.5. m tall self-supported lattice structure
and a 127. m tall guyed lattice TV-tower. We compare ice
masses on these objects within specific Ice Classes and
calculate the ice masses calculated for the structures
based on the ISO method. The results show that ISO Ice
Classes are a useful tool in assessing rime ice loads on
structures, but that systematic errors arise. These
errors tend to be on the safe side in regard to
structural design and are, at least partly, related to
poorly known ice shedding mechanisms
Original language | English |
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Pages (from-to) | 229-232 |
Journal | Engineering Structures |
Volume | 74 |
DOIs | |
Publication status | Published - 2014 |
MoE publication type | A1 Journal article-refereed |
Keywords
- structural design
- towers
- lattice structures
- ice loads
- ice class