Abstract
The article presents a description and analysis of the causes of damage to a road viaduct, made of prefabricated compressed beams of the WBS type in the 1970s. Both the design and damage are typical for objects made in those years. Damage results from the deck slab being too thin, low quality waterproof membrane, easily deformable deck surface, leaking bridge deck expansion joints, linear-contact bearings at excessively long spans, undurable drainage system elements. On the basis of the static and strength analysis, proposals for a way of repairing the viaduct were given, which, taking into account the occurrence of similar structural solutions in existing facilities, can be used as a guide when designing renovation and modernization.
Highlights
The development of motorization and road transport in Poland in the 1970’s demanded the construction of many kilometres of roads and new bridge structures
The damage was mainly caused by the use of too thin (12 cm) deck slab, low quality waterproof membrane, deformable deck surface, leaking bridge deck expansion joints, linearcontact bearings at excessively long spans, concrete kerbs, short-lived drainage system elements
The continuation of the spans above the piers was done via the deck slab only
Summary
The development of motorization and road transport in Poland in the 1970’s demanded the construction of many kilometres of roads and new bridge structures. The damage was mainly caused by the use of too thin (12 cm) deck slab, low quality waterproof membrane, deformable deck surface, leaking bridge deck expansion joints, linearcontact bearings at excessively long spans, concrete kerbs, short-lived drainage system elements. All these factors were found in the structure under consideration. In this case the damage was strongly affected by the poor quality of work resulting from time pressure, among other things. The paper presents the results of this analysis together with recommended modifications of construction solutions as well as expected effects of the proposed activities
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