Thermal Calculations for Bridge Design

by Bruce Hunt, Sr. Lect.; Dept. of Civ. Engrg., Univ. of Canterbury, Christchurch, New Zealand,
Nigel Cooke, Sr. Lect.; Dept. of Civ. Engrg., Univ. of Canterbury, Christchurch, New Zealand,


Serial Information: Journal of the Structural Division, 1975, Vol. 101, Issue 9, Pg. 1763-1781


Document Type: Journal Paper

Abstract:

A straightforward method is shown for calculating thermal stresses in bridges. Unsteady temperature distributions are obtained from numerical solutions of the one-dimensional unsteady heat equation, and comparison with experiment seems to validate the simplifying assumption that horizontal heat movements are small enough to be ignored. Stresses are calculated by solving a two-dimensional thermoelastic problem, and a design example shows that stresses calculated in this way can be significantly larger than stresses calculated by ignoring the coupling effect between longitudinal and lateral stresses.



Subject Headings: Lateral stress | Thermal effects | Thermal loads | Temperature distribution | Bridge design | Numerical methods | Comparative studies | Validation

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