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Volume 12
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10.3390/coatings12091233
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Article

Assessing Dynamic Load Allowance of the Negative Bending Moment in Continuous Girder Bridges by Weighted Average Method

by
Yelu Wang
1,2,
Jun Tian
3,*,
Yongjun Zhou
1,*,
Yu Zhao
1,
Wei Feng
4 and
Keqiang Mao
5
1
School of Highway, Chang’an University, Xi’an 710064, China
2
Key Laboratory of Bridge Detection Reinforcement Technology Ministry of Communications, Xi’an 710064, China
3
Department of Civil Engineering, Ordos Institute of Technology, Ordos 017000, China
4
Xi’an Municipal Engineering Design & Research Institute Co., Ltd., Xi’an 710064, China
5
Shan Dong Hi-Speed Yanwei Expressway Co., Ltd., Yantai 264043, China
*
Authors to whom correspondence should be addressed.
Coatings 2022, 12(9), 1233; https://doi.org/10.3390/coatings12091233
Submission received: 20 July 2022 / Revised: 17 August 2022 / Accepted: 19 August 2022 / Published: 24 August 2022
(This article belongs to the Special Issue Recent Progress in Reinforced Concrete and Building Materials)
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Abstract

Accurate acquisition of dynamic load allowance (DLA) based on measurement data is essential to the safety assessment of a bridge. When static load tests cannot be achieved, and filtering fails, the estimated DLAs from the experimental method vary widely due to the choice of a left or right band. In this paper, the proposed weighted average method (WAM) is used to possibly solve the above problem in continuous gird bridges. Two-span and three-span precast concrete box-gird bridges were selected to optimize intercepted segments of WAM for the first time with the assistance of standard deviation and coefficient of variation in statistics. Then, a DLA measurement case of the negative bending moment was utilized to verify the validity of the WAM. The results show that the intercepted segments of 10/16 to 1 times the span length were suitable for the WAM to calculate the DLA of the negative bending moment due to small offset moments and stable variation coefficients. The WAM had a strong anti-interference ability of outliers filtering in “bad data,” which differed significantly from the experimental method. In three measurements of a field bridge, DLAs obtained by the WAM had less dispersion than the experimental and low-pass filtering methods.
Keywords: bridge engineering; dynamic load allowance; weighted average method; vehicle-bridge coupled; negative bending moment bridge engineering; dynamic load allowance; weighted average method; vehicle-bridge coupled; negative bending moment

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MDPI and ACS Style

Wang, Y.; Tian, J.; Zhou, Y.; Zhao, Y.; Feng, W.; Mao, K. Assessing Dynamic Load Allowance of the Negative Bending Moment in Continuous Girder Bridges by Weighted Average Method. Coatings 2022, 12, 1233. https://doi.org/10.3390/coatings12091233

AMA Style

Wang Y, Tian J, Zhou Y, Zhao Y, Feng W, Mao K. Assessing Dynamic Load Allowance of the Negative Bending Moment in Continuous Girder Bridges by Weighted Average Method. Coatings. 2022; 12(9):1233. https://doi.org/10.3390/coatings12091233

Chicago/Turabian Style

Wang, Yelu, Jun Tian, Yongjun Zhou, Yu Zhao, Wei Feng, and Keqiang Mao. 2022. "Assessing Dynamic Load Allowance of the Negative Bending Moment in Continuous Girder Bridges by Weighted Average Method" Coatings 12, no. 9: 1233. https://doi.org/10.3390/coatings12091233

APA Style

Wang, Y., Tian, J., Zhou, Y., Zhao, Y., Feng, W., & Mao, K. (2022). Assessing Dynamic Load Allowance of the Negative Bending Moment in Continuous Girder Bridges by Weighted Average Method. Coatings, 12(9), 1233. https://doi.org/10.3390/coatings12091233

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