Report 165 Measurement of thermal cyclic movements on two portal frame bridges on the M1

Publication Year

1995

Document Status

Current

Abstract

Seasonal expansion and contraction of rigid frame bridges causes cyclic movements of the abutments which lead to variations in the earth pressures acting upon the abutment walls in service. In turn these lead to considerable uncertainties in design. The behaviour of two existing portal frame bridges spanning the M1was studied over 14 months, instrumented to monitor the longitudinal thermal movements of the bridge deck and associated change in vertical level at various points along the deck.

Publisher Information