Atypical example of the reduction of the safety and durability of a typical motorway overbridge

Henryk Ciurej,

Piotr Gwoździewicz,

Antoni Mazera

Abstrakt

The present paper is related to the motorway overbridge, the technical state of which has been showing deficiencies related mainly to the presence of cracks. Verification of the design and construction documents was carried out prior to advanced analysis which covered the construction process with phases, loads acting in various periods of time as well as the progressing ground deformations. Conclusions drawn on the basis of the analysis results are not typical because the emergency situation is resulting from many simultaneously acting factors. The level of the reduction of the safety margin of the bridge has been estimated.

Słowa kluczowe: prestressed concrete, emergency state, analysis, finite elements method, prestressing technology, settlement, safety, durability
References

[1] Bruce S.M., McCarten P.S., Freitag S.A., Hasson L.M., Deterioration of Prestressed, Concrete Bridge Beams, Land Transport New Zealand Research Report 337, Wellington, New Zealand 2008.

[2] PN-91/S-10042 Obiekty mostowe. Konstrukcje betonowe, żelbetowe i sprężone. Projektowanie.

[3] Drobiec Ł., Jasiński R., Piekarczyk A., Diagnostyka konstrukcji żelbetowych, Tom 1, PWN, Warszawa 2015.

[4] EN 1992-2:2005 Design of concrete structures. Concrete bridges. Design and detailing rules.

[5] Destrebecq J.-F., Gwoździewicz P., Midro M., Assesment of bridge structure durability – analysis and experimental verification, Architecture Civil Engineering Environment, Vol. 1/2015, 69–75.