Bridges expand and contract
due to temperature changes. Actual
Bridge temperatures may be quite different
from idealisation used in design. Recent analytical studies have shown that
existing procedures are often irrational. Sometimes predicted
movements are too
small and this
leads to damage and deterioration in the bridge. These will
significantly shorten the bridge life. In other cases, the movements are too
large and this leads to the
selection of inappropriate expansion joints and
bearings. In case of integral structures, it leads for over-dimensioning. The
paper presents preliminary results of ongoing research in Poland. Preparation
of new design guidelines for selection of bridge temperatures and
thermal movements is the aim of this effort. It will result in better long-term
performance of
Bridges and decrease initial and longterm maintenance cost. In
general, it will increase durability of bridges.
More abstracts about the Natural Thermal Behaviour of Polish Bridges