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This paper presents the dynamic assessment of a footbridge located in Kraków, southern Poland. The structure is a steel-concrete composite bridge, with the steel section designed as a spatially variable truss. While the footbridge is not classified as a slender and lightweight type, several interesting aspects were identified during in-field tests. For this study, a set of dynamic identification techniques was employed. As a reference solution, a modal model obtained using the Least Squares Complex Exponential (LSCE) method was selected, against which various solutions were compared. Subsequently, numerical analysis was conducted using the ABAQUS/Standard software, leading to the development of an experimentally validated FE model of the footbridge. In the final stage, the bridge’s response and sensitivity to different types of pedestrian-induced loadings were examined. Based on the step-by-step investigations, a set of key conclusions was formulated.

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Dynamic Performance Analysis of a Single-Span Footbridge Supported by a Spatially Variable Truss

  • 会议论文

  • 发表日期：

    2025年

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  • Izabela Drygala,
  • Joanna Dulińska,
  • Dorota Jasińska,
  • Tadeusz Tatara,
  • Mikołaj Małecki,
  • Sebastian Grabon,
  • Rok Mesar

摘要

This paper presents the dynamic assessment of a footbridge located in Kraków, southern Poland. The structure is a steel-concrete composite bridge, with the steel section designed as a spatially variable truss. While the footbridge is not classified as a slender and lightweight type, several interesting aspects were identified during in-field tests. For this study, a set of dynamic identification techniques was employed. As a reference solution, a modal model obtained using the Least Squares Complex Exponential (LSCE) method was selected, against which various solutions were compared. Subsequently, numerical analysis was conducted using the ABAQUS/Standard software, leading to the development of an experimentally validated FE model of the footbridge. In the final stage, the bridge’s response and sensitivity to different types of pedestrian-induced loadings were examined. Based on the step-by-step investigations, a set of key conclusions was formulated.