Fatigue monitoring systems Great Belt Bridge

Bitsch, Niels; Jensen, Jesper; Andersen, Johann

doi:10.1201/b10430-252

Cited by 2 publications

(2 citation statements)

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“…Fig. Great Belt Bridge, reduced fatigue life factor as function of asphalt temperature [4] It can be seen that the fatigue life is reduced by almost a factor 10 if temperature is increased from 10 ºC to 40 ºC. Great Belt Bridge, reduced fatigue life factor as function of asphalt temperature [4] It can be seen that the fatigue life is reduced by almost a factor 10 if temperature is increased from 10 ºC to 40 ºC.…”

Section: Great Belt Bridge Denmark (1998)mentioning

confidence: 99%

“…As for the Second Bosporus Bridge, the orthotropic deck on the Great Belt Bridge follows modern standards and has 12 mm deck plate with 60 mm surfacing and 7 mm troughs in the heavy lane, cut-outs for continuous troughs at diaphragms, which have a spacing of 4.0 m. The bridge is located in a climate with a yearly mean air temperature of approximately 10 ºC. Great Belt Bridge, stress amplification factor as function of asphalt temperature [4] It can be seen that the stress will be amplified by a factor 1.6 on a hot summer day with an asphalt temperature of 40 ºC compared to 10 ºC as a reference. Figure 14 shows the stress amplification factor as function of the asphalt temperature.…”

Section: Great Belt Bridge Denmark (1998)mentioning

confidence: 99%

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00.06: Advances and development needs in the structural design of steel box girders for major bridges

Polk

Walker

2017

ce papers

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Major cable-supported bridges with a span exceeding 600m would not normally be feasible without a steel box girder to carry the traffic load. These box girders generally comprise a structural steel deck plate stiffened longitudinally by open or closed ribs and transversely by diaphragms. The stiffened deck plate supports the local wheel load and distributes it to the diaphragms from where it is transferred into the box girder. The stiffening ribs also increase the total cross-sectional steel area and thereby contribute to the overall bending capacity of the box girder and finally, the stiffeners increase the resistance of the plate to buckling. This type of deck structure is generally called an "orthotropic bridge deck" due to the orthogonal nature of the stiffened deck plate and was first developed and utilised in 1950. The orthotropic steel deck is considerably lighter than a concrete slab in a composite girder and therefore makes longer span bridges possible, by reducing the self-weight forces that would otherwise dominate. The selfweight of the girder is a key driver in major bridge designs since it must be carried by all other bridge components, such as cables, towers, anchorages and foundations. The orthotropic steel girder is usually a fully closed box girder with all stiffening ribs placed inside the girder giving a smooth outer surface that is easy to paint and maintain. The interior of the closed box is often dehumidified without being painted giving an environmentally-friendly fabrication that is safe to operate and maintain. However, the orthotropic steel deck is highly prone to fatigue meaning that the number of passing lorries, their axle/wheel configuration and total vehicle weight have a significant impact on the bridge deck design and fatigue life. The orthotropic deck therefore has higher fabrication costs when compared to conventional steel structures due to the high-quality steel manufacturing and welding procedures that are necessary to achieve the required fatigue performance. The overall layout of an orthotropic bridge deck is basically unchanged since the 1960s, however the detailing has been refined considerably to a level where it is now seems difficult to improve it much further. However, the introduction of new materials e.g. sandwich steel deck structures in combination with new welding or gluing techniques could push box girder designs to new heights.

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Section: Great Belt Bridge Denmark (1998)mentioning

confidence: 99%

Section: Great Belt Bridge Denmark (1998)mentioning

confidence: 99%