Detail publikace

Application of a simple biomechanical model of a pedestrian in the solution of the dynamic response of a light bridge structure

HANZLÍK, T. SALAJKA, V. KALA, J.

Originální název

Application of a simple biomechanical model of a pedestrian in the solution of the dynamic response of a light bridge structure

Anglický název

Application of a simple biomechanical model of a pedestrian in the solution of the dynamic response of a light bridge structure

Jazyk

en

Originální abstrakt

The evaluation of the slender constructions of pedestrian footbridges includes the assessment of comfort when crossing the bridge. Aside from the effects of wind, comfort is connected with the prescribed values for the amplitude of the displacements and acceleration of the deck of a bridge structure excited by the movement of pedestrians. When designing such a structure it is necessary to determine the values for the oscillation of the bridge deck in the perpendicular and transverse directions. Basically, these calculations are carried out in a simplified manner as if there were a harmonic response at a location oscillated by selected oscillation wave shapes within a range from 0.5 to 3.5 Hz. Dynamic excitation is often considered to be the 1st harmonic from the spectrum of excitation forces triggered by a pedestrian as they walk. A more precise calculation involves the application of this force at a varying position. In this way, the movement of a pedestrian along the bridge deck can be simulated. This loading model does not, however, take into account the interaction between the pedestrian and the structure, i.e. the amplitude of the force is constant. The present contribution introduces the option of applying a simple biomechanical model in the solution of the dynamic response of a structure to pedestrian behaviour. The composition of a person is analysed, with subsequent simplification. The resultant model is single-stage only, but it allows the inertial force of a moving pedestrian to be included in the calculations alongside damping and the variable forces involved in the human-bridge dynamic interaction. The conducted numerical study concerns the monitoring of interactive forces between a pedestrian and a structure in connection with the mass and ductility of the structure.

Anglický abstrakt

The evaluation of the slender constructions of pedestrian footbridges includes the assessment of comfort when crossing the bridge. Aside from the effects of wind, comfort is connected with the prescribed values for the amplitude of the displacements and acceleration of the deck of a bridge structure excited by the movement of pedestrians. When designing such a structure it is necessary to determine the values for the oscillation of the bridge deck in the perpendicular and transverse directions. Basically, these calculations are carried out in a simplified manner as if there were a harmonic response at a location oscillated by selected oscillation wave shapes within a range from 0.5 to 3.5 Hz. Dynamic excitation is often considered to be the 1st harmonic from the spectrum of excitation forces triggered by a pedestrian as they walk. A more precise calculation involves the application of this force at a varying position. In this way, the movement of a pedestrian along the bridge deck can be simulated. This loading model does not, however, take into account the interaction between the pedestrian and the structure, i.e. the amplitude of the force is constant. The present contribution introduces the option of applying a simple biomechanical model in the solution of the dynamic response of a structure to pedestrian behaviour. The composition of a person is analysed, with subsequent simplification. The resultant model is single-stage only, but it allows the inertial force of a moving pedestrian to be included in the calculations alongside damping and the variable forces involved in the human-bridge dynamic interaction. The conducted numerical study concerns the monitoring of interactive forces between a pedestrian and a structure in connection with the mass and ductility of the structure.

Dokumenty

BibTex


@inproceedings{BUT122086,
  author="Tomáš {Hanzlík} and Vlastislav {Salajka} and Jiří {Kala}",
  title="Application of a simple biomechanical model of a pedestrian in the solution of the dynamic response of a light bridge structure",
  annote="The evaluation of the slender constructions of pedestrian footbridges includes the assessment of comfort when crossing the bridge. Aside from the effects of wind, comfort is connected with the prescribed values for the amplitude of the displacements and acceleration of the deck of a bridge structure excited by the movement of pedestrians. When designing such a structure it is necessary to determine the values for the oscillation of the bridge deck in the perpendicular and transverse directions. Basically, these calculations are carried out in a simplified manner as if there were a harmonic response at a location oscillated by selected oscillation wave shapes within a range from 0.5 to 3.5 Hz. Dynamic excitation is often considered to be the 1st harmonic from the spectrum of excitation forces triggered by a pedestrian as they walk. A more precise calculation involves the application of this force at a varying position. In this way, the movement of a pedestrian along the bridge deck can be simulated. This loading model does not, however, take into account the interaction between the pedestrian and the structure, i.e. the amplitude of the force is constant. The present contribution introduces the option of applying a simple biomechanical model in the solution of the dynamic response of a structure to pedestrian behaviour. The composition of a person is analysed, with subsequent simplification. The resultant model is single-stage only, but it allows the inertial force of a moving pedestrian to be included in the calculations alongside damping and the variable forces involved in the human-bridge dynamic interaction. The conducted numerical study concerns the monitoring of interactive forces between a pedestrian and a structure in connection with the mass and ductility of the structure.",
  booktitle="European Safety and Reliability conference",
  chapter="122086",
  howpublished="electronic, physical medium",
  year="2015",
  month="september",
  pages="2919--2928",
  type="conference paper"
}