Observations on the movement of ice at a bridge pier

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Pages135141; # of pages: 7
Subjectpiers (bridges); crackings (breaking); strain; water flow; ice loads; Bridges
AbstractPhotogrammetric observations on the movement of an ice cover about a bridge pier are presented. Most of the movement was across river rather than up or downstream, and appeared to be related to the crack pattern that developed about the pier due to changes in water level. It is suggested that when cracks form on the under side of the cover they fill with water which subsequently freezes. Because of the resulting increase in area, a thrust is developed in the cover when the water returns to its original level. Flooding of the cover about the pier had a major influence on the characteristics of the ice adjacent to the pier. Observations on the vertical deflection of the cover and the location of cracks gave for E/(1-sigma[2]) a value of about 3.5 X 10[5] psi where E and sigma are the effective Young's modulus and Poisson's ratio. It is suggested that observations on the deflection of ice covers adjacent to long straight walls can give useful information on the vertical forces that ice can exert on structures.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number10481
NPARC number20375018
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Record identifier088c35be-9344-4c98-98f5-7dd6a3861a3a
Record created2012-07-23
Record modified2016-05-09
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