A simplified method to account for vertical human-structure interaction
نویسندگان
چکیده
To account for vertical human-structure interaction (HSI) in the vibration serviceability analysis, contact force between pedestrian and structure can be modelled as superposition of induced by on a rigid surface resulting from mechanical human body. For case large crowds, this approach leads to (time-variant) models with very high number degrees freedom (DOFs). simplify paper investigates performance an equivalent single-degree-of-freedom whereby effect HSI is translated into effective natural frequency modal damping ratio each mode supporting structure. First, numerical study considers footbridge that simply-supported beam which only fundamental bending taken account. relevant range crowd parameters, comparison made structural response predicted simplified model more accurate reference accounts all DOFs coupled crowd-structure model. Where found underestimate response, although limited extent, compensated introducing correction factor ratio. Second, method evaluated through application real footbridge. The results show allows good mildly conservative estimate acceleration within 10–20% predictions
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ژورنال
عنوان ژورنال: Structures
سال: 2021
ISSN: ['2352-0124']
DOI: https://doi.org/10.1016/j.istruc.2021.03.090