Vertical footbridge vibrations: Towards an improved and codifiable response evaluation

Einar Thór Ingólfsson; Christos Georgakis; Jeppe Jönsson; Fransesco Ricciardelli

Vertical footbridge vibrations: Towards an improved and codifiable response evaluation

Einar Thór Ingólfsson, Christos Georgakis, Jeppe Jönsson, Fransesco Ricciardelli

Mediterranea University of Reggio Calabria

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

An improved and codifiable footbridge response evaluation is presented herewith, in which peak vertical accelerations are provided as a function of load return period in the form of response spectra. To achieve this, a series of Monte Carlo simulations are employed to generate vertical loads induced by a "random" crowd that are subsequently used in linear timehistory analyses of the response of bridges with varying fundamental frequencies. The peak accelerations are presented as a function of return period and it is shown that the acceleration response due to a crowd is lower than $\sqrt{N}$ times the response of a single pedestrian, which is often referred to as a conservative estimate for crowds.

Original language	English
Title of host publication	Proceedings of the Third International Conference on Structural Engineering, Mechanics and Computation
Place of Publication	Rotterdam, Netherlands
Publisher	Millpress
Publication date	2007
Publication status	Published - 2007
Event	Third International Conference on Structural Engineering, Mechanics and Computation - Cape Town, South Africa Duration: 10 Sept 2007 → 12 Sept 2007 Conference number: 3

Conference

Conference	Third International Conference on Structural Engineering, Mechanics and Computation
Number	3
Country/Territory	South Africa
City	Cape Town
Period	10/09/2007 → 12/09/2007

Keywords

Footbridge, dynamics, pedestrian, vertical vibrations, load model, response spectrum, return period.

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title = "Vertical footbridge vibrations: Towards an improved and codifiable response evaluation",

abstract = "An improved and codifiable footbridge response evaluation is presented herewith, in which peak vertical accelerations are provided as a function of load return period in the form of response spectra. To achieve this, a series of Monte Carlo simulations are employed to generate vertical loads induced by a {"}random{"} crowd that are subsequently used in linear timehistory analyses of the response of bridges with varying fundamental frequencies. The peak accelerations are presented as a function of return period and it is shown that the acceleration response due to a crowd is lower than $\sqrt{N}$ times the response of a single pedestrian, which is often referred to as a conservative estimate for crowds.",

keywords = "Footbridge, dynamics, pedestrian, vertical vibrations, load model, response spectrum, return period.",

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year = "2007",

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booktitle = "Proceedings of the Third International Conference on Structural Engineering, Mechanics and Computation",

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Ingólfsson, ET, Georgakis, C, Jönsson, J & Ricciardelli, F 2007, Vertical footbridge vibrations: Towards an improved and codifiable response evaluation. in Proceedings of the Third International Conference on Structural Engineering, Mechanics and Computation. Millpress, Rotterdam, Netherlands, Third International Conference on Structural Engineering, Mechanics and Computation, Cape Town, South Africa, 10/09/2007.

Vertical footbridge vibrations: Towards an improved and codifiable response evaluation. / Ingólfsson, Einar Thór; Georgakis, Christos; Jönsson, Jeppe et al.
Proceedings of the Third International Conference on Structural Engineering, Mechanics and Computation. Rotterdam, Netherlands: Millpress, 2007.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Vertical footbridge vibrations: Towards an improved and codifiable response evaluation

AU - Ingólfsson, Einar Thór

AU - Georgakis, Christos

AU - Jönsson, Jeppe

AU - Ricciardelli, Fransesco

N1 - Conference code: 3

PY - 2007

Y1 - 2007

N2 - An improved and codifiable footbridge response evaluation is presented herewith, in which peak vertical accelerations are provided as a function of load return period in the form of response spectra. To achieve this, a series of Monte Carlo simulations are employed to generate vertical loads induced by a "random" crowd that are subsequently used in linear timehistory analyses of the response of bridges with varying fundamental frequencies. The peak accelerations are presented as a function of return period and it is shown that the acceleration response due to a crowd is lower than $\sqrt{N}$ times the response of a single pedestrian, which is often referred to as a conservative estimate for crowds.

AB - An improved and codifiable footbridge response evaluation is presented herewith, in which peak vertical accelerations are provided as a function of load return period in the form of response spectra. To achieve this, a series of Monte Carlo simulations are employed to generate vertical loads induced by a "random" crowd that are subsequently used in linear timehistory analyses of the response of bridges with varying fundamental frequencies. The peak accelerations are presented as a function of return period and it is shown that the acceleration response due to a crowd is lower than $\sqrt{N}$ times the response of a single pedestrian, which is often referred to as a conservative estimate for crowds.

KW - Footbridge, dynamics, pedestrian, vertical vibrations, load model, response spectrum, return period.

M3 - Article in proceedings

BT - Proceedings of the Third International Conference on Structural Engineering, Mechanics and Computation

PB - Millpress

CY - Rotterdam, Netherlands

T2 - Third International Conference on Structural Engineering, Mechanics and Computation

Y2 - 10 September 2007 through 12 September 2007

ER -

Vertical footbridge vibrations: Towards an improved and codifiable response evaluation

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Keywords

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