Incremental Launching Construction Control of Long Multispan Composite Bridges
Publication: Journal of Bridge Engineering
Volume 20, Issue 11
Abstract
The low stiffness of steel U-shaped girders during incremental launching construction has led to the development of an innovative incremental launching construction method that addresses the special requirements of long, multispan composite bridges. A local stress control strategy is utilized to avoid local yielding of the bottom plate. Analysis of the geometric shape control characteristics of composite bridges located on vertical curves allows a control strategy for launching to be established and validated. The concept of state vector is introduced for geometric shape control and prediction. Field results reveal that most of the elevation errors fall into the range of . This paper demonstrates that highly precise control of geometric shapes can be achieved via the proposed methodology. Through accurate analysis of the geometric shapes of composite bridges, errors can be detected and corrected in a timely manner.
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Acknowledgments
The authors would like to express their sincere gratitude to the Hangzhou Urban Infrastructure Development Corporation, which provided the engineering background and supported this study. The authors also gratefully acknowledge the support of the Zhejiang Provincial Natural Science Foundation (Grant No. Y1110181) and the National Natural Science Foundation Projects of China (Grant Nos. 51108411 and 11172266).
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 20 • Issue 11 • November 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jan 24, 2014
Accepted: Oct 22, 2014
Published online: Mar 24, 2015
Discussion open until: Aug 24, 2015
Published in print: Nov 1, 2015
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