Alternatives for bridge surfacings with orthotropic plated deck: a fatigue point of view

• Autorzy: De Backer H. , Outtier A. , Van Bogaert P.
• Języki publikacji: EN

Abstrakty

EN

Steel orthotropic decks are sensitive to stiffener-to-deckplate fatigue. Larger traffic volumes and concentrated wheel loads contribute to this phenomenon. Traditionally, the effect of the wearing courses is taken into account through load dispersal under 45° reducing the stress at the deck plate surface. However for asphalt surfacings this effect is small. A more reliable solution could be present if a structural cooperation were present between the deck and the surfacing. In this paper, the results are presented from a study of various alternatives for a lightweight bridge surfacing contributing to fatigue reduction at the stiffener-to-deckplate intersection. Asphalt, neoprene and composite layers are considered as well as honeycomb sandwich panels. The effect of the solutions is measured by strain gauges on an orthotropic bridge prior to the final surfacing installation. The results are compared with conclusions derived from a finite element model and indicate that depending on the type of layer, a 20 to 30 % reduction of stresses is possible, resulting in a 3 to 5 times longer fatigue life, without increasing the deck weight.

Słowa kluczowe

EN

orthotropic bridge deck; fatigue; surfacing; asphalt; stiffener-to-deckplate detail; honeycomb pannel

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Foundations of Civil and Environmental Engineering
• Rocznik: 2008
• Tom: No. 11
• Strony: 5--16
• Opis fizyczny: Bibliogr. 6 poz.

Twórcy

autor

De Backer H.

autor

Outtier A.

autor

Van Bogaert P.

• Civil Engineering Department, Ghent University, Technologiepark 904, 9052 Ghent, Belgium Tel.: [phone]; fax: [phone],

Bibliografia

• 1.De Corte W.: An improved detail category for trapezoidal stiffener to deck plate welds, based on full scale stress data and fatigue tests, in: 3rd International Conference on New Dimensions in Bridges, Kuala Lumpur, Malaysia, 2003, 139-149.
• 2.ENV 1991-3: „Eurocode 1 - Basis of design and actions on structures – Part 3:Traffic loads on bridges”, CEN Brussels, 1995.
• 3. ENV 1993-3: “Eurocode 3 - Design of Steel Structures - Part 3: Steel Bridges”, CEN Brussels, 1997
• 4. De Backer H., De Corte W., De Pauw B., Van Bogaert Ph.: The use of dispersion layers to reduce the fatigue damage in orthotropic steel bridge decks, in: 10th Nordic Steel Construction Conference, Copenhagen, Denmark, 2004, 413-424.
• 5.Taerwe L., Thomas P., Poppe A.-M., Methodologie voor ontwerp en evaluatie van het draagvermogen van wegbruggen onderhevig aan werkelijke verkeerstoestanden - Experimenteel Onderzoek, Laboratorium Magnel, Ghent 1999
• 6.ENV 1992-2: “Eurocode 2 - Design of Concrete Structures - Part 2: Concrete bridges”, CEN Brussels, 1996