Dynamic Impact of Heavy Traffic Load on Typical T-Beam Bridges Based on WIM Data
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 3
Abstract
In recent years, many bridge collapse accidents have been attributed to the passage of extra heavy trucks (EHTs, gross weight ) in numerous countries. Compared with the standard traffic loads in design specifications, the actual characteristics of EHTs are very difficult to predict because they may be specific to the management, charge policy, or other properties of the route. In a previous publication, the authors researched the characteristics and dynamic impact of EHTs on Chinese expressways. In the current study, long-term traffic monitoring data were statistically analyzed to identify the key characteristics of EHTs on Chinese first-class highways. Based on the EHT scenarios extracted from the weigh-in-motion (WIM) data, which can be used to record the traffic information of moving vehicles, a comprehensive simulation analysis was conducted by an in-house advanced dynamic bridge–traffic interaction model on five typical simply supported T-beam bridges. The bridge response and dynamic impact factors (DIFs) of EHTs were numerically investigated, and reasonable expressions for calculating the DIFs were proposed. Finally, the load effect calibration under EHTs was performed when the road surface condition was average. These findings can be used as additional references for bridge codes and safety assessment by practicing engineers.
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Information & Authors
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 3 • June 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Mar 30, 2016
Accepted: Sep 30, 2016
Published online: Jan 23, 2017
Published in print: Jun 1, 2017
Discussion open until: Jun 23, 2017
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