Analytic Model of Long-Span Self-Shored Arch Bridge
Publication: Journal of Bridge Engineering
Volume 7, Issue 1
Abstract
An innovative self-shoring staged construction method was developed to build the world’s longest reinforced composite concrete arch bridge across the Yangtze River at Wanxian, in Chongqing, China. The method uses a steel tube truss frame constructed by the conventional cantilever launching technique. This steel frame with concrete-filled tubes performs the dual role of arch falsework and arch main reinforcement for the final reinforced concrete arch bridge. An optimized schedule for concrete placement was proposed to control the stresses, deflections, and stability of the arch rib during construction. The time dependent effects of concrete, the nonlinear stress-strain relationship of steel and concrete, as well as the geometric nonlinearility were considered. Control information at various stages of construction can be provided using the model developed. A program was developed to conduct parametric studies for selection of the final construction scheme and to direct the construction progress by monitoring and comparing actual and predicted stress and deflection.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 7 • Issue 1 • January 2002
Pages: 14 - 21
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Aug 4, 1998
Accepted: Mar 12, 2001
Published online: Jan 1, 2002
Published in print: Jan 2002
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