Finite Element Models of a Benchmark Footbridge

Applied Sciences

卷:11

Fiammetta Venuti¹  Marc Lizana²  Branko Glisic³  Marco Domaneschi⁴ 

[1] Department of Architecture and Design, Politecnico di Torino, 10125 Turin, Italy;

[2] Department of Civil and Environmental Engineering, Politecnico di Milano, 20133 Milan, Italy;

[3] Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, USA;

[4] Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, 10129 Turin, Italy;

关键词: benchmark footbridge;    running pedestrians;    vibration serviceability;    SHM;    FE model;   

DOI  :  10.3390/app11199024

来源: DOAJ

【 摘 要 】

Modern footbridges are often lively structures, characterized by natural frequencies that fall in the range of pedestrian activities, such as walking, running, and jumping. Therefore, serviceability assessment under human-induced excitation is crucial both at the design stage and during the footbridge lifetime. This paper presents and validates two different FE models of an existing footbridge with very complex geometry: the Streicker Footbridge at the Princeton University Campus. It represents a benchmark in the field as a testbed for vibration serviceability assessments under pedestrian excitation. The real structure is equipped with strain and temperature sensors that are currently used to collect measurements in both static and dynamic modes for research and educational purposes in Structural Health Monitoring (SHM). Based on detailed drawings of the Streicker Footbridge, a three-dimensional beam-based model was developed to represent the complex behavior of the full-scale benchmark bridge. Subsequently, a more refined discretization of the bridge deck adopting shell elements was inserted. The bridge Finite Element models were validated against available SHM data concerning static and dynamic tests. The relevant ANSYS APDL script files along with an example of pedestrian jumping application are available upon request for further research developments on the relationship between pedestrians and the benchmark footbridge.

【 授权许可】

Unknown