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Durability of flexible steel corrugated shell structures - theory and practice

Wysokowski A.

Archiwum Instytutu Inżynierii Lądowej

2017

Nr 23

347--361

The technical issues described in this paper concern the durability aspects of buried flexible steel structures. It is well known that due to the nature of the bridge loads including buried flexible steel structures, they are particularly exposed to fatigue. Fatigue of steel structures - in this case corrugated steel plates - is closely related to such important parameters as safety and durability, and has direct impact on the service life of these structures. As these issues are very important, they are often analyzed by many research centers, with the present author contributing to the work of many of them. Fatigue reveals itself in the critical phase as fatigue cracks in structural steel, or in the joints. In such critical cases this leads to the exclusion of objects from the service. The fatigue of soil structure around the steel corrugated shell in the structures under analysis should also be taken into account. Fatigue in steel structures intensified by the occurrence of corrosion due to the operating conditions of the structures (negative environmental impact of water) is widespread. According to the author, proper construction of buried flexible steel structures and their maintenance undoubtedly increase the safety of users and extend the service life. At the end on the paper the author describes one of the methods of increasing the durability of shell structures by reinforcing the soil using a geotextile geomembrane.

Influence of results of testing on manner of constructing culverts and animals passage made as buried flexible steel structures

Wysokowski A., Howis J.

Archiwum Instytutu Inżynierii Lądowej

2012

Nr 12

275-288

A large number of tests of modern flexible soil-steel structures with corrugated steel plates made, among others,with the participation of the author of this paper leads to a better understanding of their behavior under static, dynamic and fatigue loads. On this basis, methods of calculation and building of these structures are still being improved. These aspects contribute to increasing the efficiency of flexible soil-steel structures with corrugated plates in terms of capacity, durability, and economics of these solutions. Too little attention, however, is given to taking into account the results of this type of research and testing in constructing and equipping suitable animal crossings. This is important for these objects in terms of their stiffness, dynamics - vibration, noise, etc. These issues are discussed by the authors in this paper.

Duża liczba testów nowoczesnych podatnych konstrukcji gruntowo-stalowych z falistej blachy stalowej przeprowadzona, między innymi, z udziałem autora tej pracy, prowadzi do lepszego zrozumienia ich zachowania pod obciążeniem statycznym, dynamicznym i zmęczeniowym. Metody przeprowadzania obliczeń i budowy tych konstrukcji są ciągle ulepszane na tej podstawie. Te czynniki przyczyniają się do zwiększania osiągów podatnych konstrukcji gruntowo-stalowych z blach falistych pod względem wytrzymałości, trwałości i opłacalności. Zbyt mało uwagi, jednakże, poświęca się uwzględnianiu rezultatów badań i testów tego typu podczas budowania i wyposażania odpowiednich przejść dla zwierząt. Te czynniki są istotne dla takich obiektów z punktu widzenia ich sztywności, dynamiki, drgań, hałasu etc. Te kwestie zostały omówione w tej pracy przez autorów.