Lateral-Torsional Instability of Box Girder Bridges at Erection
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Bibliographic Details
| Author(s): |
Per-O Thomasson
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008 | ||||
| Published in: | IABSE Congress Chicago 2008 | ||||
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| Page(s): | 414-415 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2008 | ||||
| DOI: | 10.2749/222137908796293181 | ||||
| Abstract: |
Open top trapezoidal box sections of steel are widely used as a part of composite bridges. Before the rigidifying effect of the slab has developed, they usually have extremely low torsional rigidity. The collapse of Bridge Y1504 in Sweden 2002 during its construction raised a number of questions concerning the design and erection of box girder bridges. Based on this case, various aspects on the stability and behaviour of box girder bridges during construction will be addressed. Particularly prone to lateral-torsional instability at erection are single span bridges with no warping restraint at the ends. A method for a second order analysis of the lateral-torsional behaviour is presented together with some results. |
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| Keywords: |
box girder bridges imperfections wind load second order analysis monitoring bridge collapse lateral-torsional instability thin walled beams formwork of profiled steel sheeting
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