Yunoyama Serow Bridge Superstructure Construction

The Angus L. Macdonald Bridge, a major suspension bridge that crosses Halifax Harbour in Halifax, Nova Scotia, opened to traffic in 1955. The bridge deck has reached the end of its service life, and the design of the new bridge superstructure and its replacement sequence were completed in 2014. The entire suspended structure and hangers are now being replaced sequentially during night and weekend closures while the bridge is opened for traffic during the daytime. The erection sequence is supported by sophisticated automated erection analysis models which take into account the geometry of the existing bridge, positioning of the erection equipment on the deck, and hanger and strand jack adjustments that are required during construction. Significant wind tunnel testing and analysis have been performed to ensure aerodynamic stability of the bridge during erection and in its final condition.

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Final Report of the Special Committee on Specifications for Bridge Design and Construction on Specifications for Design and Construction of Steel Railway Bridge Superstructure

Transactions of the American Society of Civil Engineers ◽

10.1061/taceat.0003366 ◽

1923 ◽

Vol LXXXVI (1) ◽

pp. 471-531

Author(s):

Keyword(s):

Final Report ◽

Special Committee ◽

Railway Bridge ◽

Bridge Design ◽

Bridge Superstructure ◽

Steel Railway Bridge ◽

Design And Construction

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Existing Steel Railway Bridges Evaluation

Civil and Environmental Engineering ◽

10.1515/cee-2016-0014 ◽

2016 ◽

Vol 12 (2) ◽

pp. 103-110 ◽

Cited By ~ 6

Author(s):

Josef Vičan ◽

Jozef Gocál ◽

Jaroslav Odrobiňák ◽

Peter Koteš

Keyword(s):

Carrying Capacity ◽

Global Analysis ◽

Evaluation Process ◽

Steel Bridge ◽

Load Carrying Capacity ◽

Railway Bridges ◽

Load Carrying ◽

Bridge Superstructure ◽

Existing Bridges ◽

Capacity Determination

Abstract The article describes general principles and basis of evaluation of existing railway bridges based on the concept of load-carrying capacity determination. Compared to the design of a new bridge, the modified reliability level for existing bridges evaluation should be considered due to implementation of the additional data related to bridge condition and behaviour obtained from regular inspections. Based on those data respecting the bridge remaining lifetime, a modification of partial safety factors for actions and materials could be respected in the bridge evaluation process. A great attention is also paid to the specific problems of determination of load-caring capacity of steel railway bridges in service. Recommendation for global analysis and methodology for existing steel bridge superstructure load-carrying capacity determination are described too.

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