Investigation of Temperature Effects on Steel-Truss Bridge Based on Long-Term Monitoring Data: Case Study
Publication: Journal of Bridge Engineering
Volume 25, Issue 9
Abstract
The time-varying average and differential temperatures may significantly change the performance of steel truss bridges, which may increase the difficulties for bridge design, construction, and maintenance. Because hundreds of steel members usually have different geometric dimensions, the temperature effect on the steel truss bridge is extremely complicated, and no general formula is available for predicting temperature-induced responses. In this study, the 2-year field monitoring data collected from a 108-m-long steel truss bridge are utilized to investigate the temperature effects on strain responses. In particular, the relationships between temperature-induced stress and standard temperature actions are investigated using correlation analysis and numerical simulation. Accordingly, the simple general formula is provided to capture the relationships between temperature distributions and temperature-induced strains. The accuracy of the proposed formula is verified using the field monitoring data of the box-shaped members and the H-shaped members. The notable vertical temperature gradients are usually observed in box-shaped members, which can generate larger thermal strain responses than H-shaped members. The results of this study could provide a simple and relatively general solution to predict the temperature-induced strain of steel truss bridges. Meanwhile, this conclusion drawn may provide references for the design and maintenance of steel truss bridges.
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Acknowledgments
The authors would like to gratefully acknowledge the supports from the National Basic Research Program of China (973 Program) (Grant No. 2015CB060000), the National Natural Science Foundation of China (Grant No. 51722804), the National Natural Science Foundation of China (Grant No. 51978155), the National Ten Thousand Talent Program for Young Top-notch Talents (Grant No. W03070080), the Jiangsu Transportation Scientific Research Project (Grant No. 8505001498), the Jiangsu Key R & D Plan (Grant No. BE2018120), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX19_0095), and the China Scholarship Council (Grant No. 201906090075). The authors also thank the help from Highway Administration of Jiangsu Communications Department and Changzhou Highway Administration Department for providing long-term monitoring data of the Benniu Bridge.
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Published In
Journal of Bridge Engineering
Volume 25 • Issue 9 • September 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Jul 10, 2019
Accepted: Apr 3, 2020
Published online: Jun 18, 2020
Published in print: Sep 1, 2020
Discussion open until: Nov 18, 2020
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