Analysis of Existing Steel Railway Bridges

Vičan, Josef; Gocál, Jozef; Odrobiňák, Jaroslav; Koteš, Peter

doi:10.1016/j.proeng.2016.08.328

Cited by 19 publications

(12 citation statements)

References 4 publications

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“…The paper presents the possibility of using fibre reinforced concrete to strengthen columns taking into account the effect of contact between old concrete and new fibre reinforced concrete on the load-carrying capacity of the cross-section. The practical use of the work can be to strengthen the columns of frame structures or piers of the substructure of bridges with insufficient load-carrying capacity of the cross-section [28][29][30]. It is possible to solve the mentioned problems also using probabilistic analysis [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Strengthening of Concrete Column by Using the Wrapper Layer of Fibre Reinforced Concrete

et al. 2020

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Structures and bridges are being designed on the proposed and requested design lifetime of 50 to 100 years. In practice, one can see that the real lifetime of structures and bridges is shorter in many cases, in some special cases extremely shorter. The reasons for the lifetime shortening can be increased of the load cases (e.g., due to traffic on bridges, or due to other uses of a structure), using the material of lower quality, implementation of new standards and codes according to Eurocode replacing older ones. During the whole lifetime the structures must be maintained to fulfil the code requests. If the constructions are not able to fulfil the Ultimate Limit States (ULS) and the Serviceability Limit State (SLS), the structures or bridges have to be strengthened (whole or its elements). The purpose of the paper is the presentation of using a layer of the fibre concrete for a columns’ strengthening. Using the fibre reinforced concrete (FRC) of higher tensile strength makes it possible to increase the load-bearing capacity of the cross-section the column. The contact between the old concrete (core of column) and newly added layer (around column) is very important for using that method of strengthening. In the article, there is also a comparison of the surface modification methods.

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Section: Introductionmentioning

confidence: 99%

Strengthening of Concrete Column by Using the Wrapper Layer of Fibre Reinforced Concrete

et al. 2020

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“…Apart from e.g., change of loads or intensity of loads in time, which can induce a loss or growth of the reliability depending on the increase or decrease of loads, the degradation of materials significantly influences the cross-sectional reliability [1]. Therefore, it is possible to say that this factor explicitly causes the reduction of reliability of steel bridge members [2,3].…”

Section: Introductionmentioning

confidence: 99%

Influence of Fatigue Crack Formation and Propagation on Reliability of Steel Members

Koteš

Vičan

2021

Applied Sciences

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During the years of bridge exploitation, many degradation processes and external influences attack its structure. Therefore, bridge reliability and durability is decreasing in time. On the other hand, the traffic load remains almost the same or even higher than in the past. However, bridges should not to become the limiting component of communication capacity and traffic reliability. Regarding to reliability, bridges should be assessed from the viewpoint of the Ultimate Limit States (ULS) and Serviceability Limit States (SLS). Within the ULS, cross-sections and members are verified for various types of stressing and their combinations, and also for fatigue at the same time. The cross-sectional verification, e.g., for bending stresses and fatigue, is done independently according to corresponding criteria of the ULS determined for strength verification a fatigue assessment separately. The presented article deals with the steel railway plate girder bridge with bottom member deck, in which there is an effort to prove the effect of the crack in tension bottom flange due to fatigue stressing on the change of bending resistance over time. The analytical calculation was derived and at the same time, the probabilistic approach of the influence of the fatigue crack size on the change of the cross-sectional resistance and reliability over time was used.

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“…In many ways, steel bridges exhibit very similar problems like structures (in our case crane) in industrial facilities [1]. The fatigue assessment guideline for the estimation of the remaining fatigue life of steel bridges [2] is a useful tool commonly applied for condition assessment that complements bridge management systems.…”

Section: Introductionmentioning

confidence: 99%

Comparison of fatigue crack propagation behaviour in two steel grades S235, S355 and a steel from old crane way

et al. 2020

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Utilization of various steel grades in civil engineering allows designing bridges, bridge elements or simple structures according to their fracture mechanical properties. The service intervals of structures, which are going to be in use for a long time, cannot be calculated only on the basis of tensile and brittle fracture properties but also on the knowledge of the resistance to the fatigue crack growth. This contribution presents a comparison of the fatigue behaviour of two modern steel grades S235 J2, S355 J2 and a steel extracted from an old crane way. The comparison of these steel grades is done by fatigue crack propagation tests (the results of the experimental tests are described using concept of the stress intensity factor range ΔK). The fatigue properties are discussed and recommendations for the use of the steels are stated.

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Analysis of Existing Steel Railway Bridges

Cited by 19 publications

References 4 publications

Strengthening of Concrete Column by Using the Wrapper Layer of Fibre Reinforced Concrete

Strengthening of Concrete Column by Using the Wrapper Layer of Fibre Reinforced Concrete

Influence of Fatigue Crack Formation and Propagation on Reliability of Steel Members

Comparison of fatigue crack propagation behaviour in two steel grades S235, S355 and a steel from old crane way

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