In-Situ Test and Dynamic Response of a Double-Deck Tied-Arch Bridge


In this study, in-situ dynamic tests of the world's longest steel box tied-arch bridge over the Yangtze River, China, are reported. The double deck bridge supports highway and monorail systems at upper and lower levels, respectively. Strain, displacement, and acceleration responses were measured and used to investigate the vibration characteristics of the bridge when excited by running trains and/or trucks at a speed of 5-60 km/h, train braking, and truck bouncing. Impact factors were correlated with the running speed of trains and trucks. A three-dimensional finite element model of the coupled monorail-train-bridge vibration system accounting for track irregularities was established to understand the system behavior and validated by the experimental results. Truck bouncing was the dominant impact factor on bridge responses. The running speed of vehicles determined the riding comfort of traveling trains.


Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

INSPIRE - University Transportation Center

Keywords and Phrases

Arches; Automobiles; Finite element method; Railroad bridges; Trucks; Vibration analysis; Dynamic tests; Impact; Riding comfort; Straddle type monorail; Tied arch bridges; Vibration; Arch bridges; Double-deck tied-arch bridge; Finite element analysis; In-situ dynamic test; Straddle-type monorail

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


File Type





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Publication Date

01 Apr 2018