Modeling vehicle load for a long-span bridge based on weigh in motion data. (October 2021)

• Record Type: Journal Article
• Authors: Hou, Ning; Sun, Limin; Chen, Lin
• Is Part Of: Measurement. Volume 183(2021)
• Publication Date: 2021-10
• Subjects: Vehicle load -- Long-span bridges -- Peaks over threshold -- Generalized Pareto distribution -- Structural safety assessment; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2021.109727
• Languages: English
• ISSNs: 0263-2241

Abstract

Abstract: Vehicle load is critical for safety assessment of bridge structures in operational condition. This study focuses on modeling vehicle load based on long-term weigh-in-motion (WIM) data from a long-span cable-stayed bridge. Two key issues in the modeling, i.e., vehicle selection and transformation of data statistics to a deterministic load model, are addressed. In the established model, the concentrated load is found to be much greater than the value used in the design stage. The result suggests the importance of vehicle load model from WIM data and it should be used for safety assessment of operational bridges. Highlights: One-year WIM data including 2, 137, 875 vehicles on a long-span cable-stayed bridge. Four different methods to select the threshold of the tail data are compared. An assessment load model is established in the same form as the design load. Vehicle concentrated loads are found to be greater than the design value.