Temperature Effects on Strain Influence Lines and Dynamic Load Factors in a Steel-Truss Arch Railway Bridge Using Adaptive FIR Filtering
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 4
Abstract
The dynamic strain response due to the passing trains is one of the most important indexes in the design and maintenance of long-span steel-truss arch railway bridges. The strain influence line (IL) and dynamic load factor (DLF) are used to characterize the vehicle-induced strain response of bridge members. Temperature effects on ILs and DLFs of strain response due to high-speed trains in various bridge structural members are investigated. An adaptive finite impulse response (FIR) filter is implemented to obtain the strain IL and DLF for the response of various structural members of the Dashengguan Yangtze River Bridge using data from strain sensors that are part of the bridge structural health monitoring (SHM) system. Relationships between the strain ILs and DLFs and temperature are obtained for various members. The analysis reveals that (1) the DLFs for the short hangers require further study; (2) the effect of temperature on the ILs of each member in the subject bridge can be described by polynomials; and (3) the DLFs of the majority of the structural members are not related to temperature. Recommendations to improve the design, maintenance, and long-term monitoring of steel-truss arch bridges are provided.
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Acknowledgments
The authors gratefully acknowledge the support of the National Basic Research Program of China (973 Program) (No. 2015CB060000), the National Science and Technology Support Program of China (No. 2014BAG07B01), the National Natural Science Foundation of China (Nos. 51438002 and 51578138), the Scientific Research Foundation of the Graduate School of Southeast University (YBJJ1657), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). The authors gratefully acknowledge the support of the China Railway Major Bridge (Nanjing) Bridge and Tunnel Inspect & Retrofit Co., Ltd.
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Information & Authors
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jun 26, 2016
Accepted: Dec 6, 2016
Published ahead of print: Feb 15, 2017
Published online: Feb 16, 2017
Discussion open until: Jul 16, 2017
Published in print: Aug 1, 2017
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