Modelling crowd–bridge dynamic interaction with a discretely defined crowd

Carroll, S.P.; Owen, J.S.; Hussein, M.F.M.

doi:10.1016/j.jsv.2012.01.025

Cited by 50 publications

(71 citation statements)

References 13 publications

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“…Both modelling approaches have been used to simulate pedestrian crowd traffic only on footbridges that vibrate in the lateral direction (e.g. [34][35][36][37]). Despite a large number of proposed models and their comparisons in the literature [29,38], strong arguments in favour of one modelling approach and its outstanding performance in the context of vibration engineering still cannot be found.…”

Section: Introductionmentioning

confidence: 99%

Modelling framework for dynamic interaction between multiple pedestrians and vertical vibrations of footbridges

Venuti

Racić

Corbetta

2016

Journal of Sound and Vibration

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After 15 years of active research on the interaction between moving people and civil engineering structures, there is still a lack of reliable models and adequate design guidelines pertinent to vibration serviceability of footbridges due to multiple pedestrians. There are three key issues that a new generation of models should urgently address: pedestrian “intelligent” interaction with the surrounding people and environment, effect of human bodies on dynamic properties of unoccupied structure and inter-subject and intra-subject variability of pedestrian walking loads. This paper presents a modelling framework of human–structure interaction in the vertical direction which addresses all three issues. The framework comprises two main models: (1) a microscopic model of multiple pedestrian traffic that simulates time varying position and velocity of each individual pedestrian on the footbridge deck, and (2) a coupled dynamic model of a footbridge and multiple walking pedestrians. The footbridge is modelled as a SDOF system having the dynamic properties of the unoccupied structure. Each walking pedestrian in a group or crowd is modelled as a SDOF system with an adjacent stochastic vertical force that moves along the footbridge following the trajectory and the gait pattern simulated by the microscopic model of pedestrian traffic. Performance of the suggested modelling framework is illustrated by a series of simulated vibration responses of a virtual footbridge due to light, medium and dense pedestrian traffic. Moreover, the Weibull distribution is shown to fit well the probability density function of the local peaks in the acceleration response. Considering the inherent randomness of the crowd, this makes it possible to determine the probability of exceeding any given acceleration value of the occupied bridge

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Section: Introductionmentioning

confidence: 99%

Modelling framework for dynamic interaction between multiple pedestrians and vertical vibrations of footbridges

Venuti

Racić

Corbetta

2016

Journal of Sound and Vibration

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“…This approach could lead to estimate of probability of exceedance of a particular vibration level over given return period [19,20]. The drawback of this approach is that it could only be applied to stationary ergodic processes.…”

Section: Challenge 1: Randomnessmentioning

confidence: 99%

“…For example, while peak force and contact ratio exhibit jump-by-jump variations, they are also correlated as shown in Figure 6. There is currently no simple guidance aimed at the structural engineers about incorporating this type of relationship in the probabilistic models; however there are a number of modelling proposals available in literature concerned with both walking [20,[24][25][26][27][28] and jumping/bobbing activities [29,30]. ( ) a Figure 5.…”

Section: Challenge 1: Randomnessmentioning

confidence: 99%

“…A way to observe emerging crowd behaviour based on microscopic model of pedestrians is to utilise discrete element theory [20]. This theory makes use of individual characteristics of pedestrians as well as empirically observed behavioural rules to simulate movement of pedestrians in their natural environments.…”

Section: Challenge 3: Hhimentioning

confidence: 99%

“…The factors of interest are, for example, the motivation of pedestrian to reach the intended location in planned time, and need to avoid collisions with other pedestrians and physical obstacles encountered en route. Carroll et al [20] proposed integrating this model into simulations of the pedestrian traffic for evaluation of the vibration serviceability state of the structure and pointed out that this approach could be a powerful and cost effective tool for the design of new structures and implementation of the traffic calming measures (e.g. temporary potted threes) during exceptional, rarely occurring, events.…”

Section: Challenge 3: Hhimentioning

confidence: 99%

See 2 more Smart Citations

Modelling human actions on lightweight structures: experimental and numerical developments

Živanović

2015

MATEC Web of Conferences

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Abstract. This paper presents recent, numerical and experimental, developments in modelling dynamic loading generated by humans. As modern structures with exposure to human-induced loading, such as footbridges, building floors and grandstands, are becoming ever lighter and more slender, they are increasingly susceptible to vibration under human-induced dynamic excitation, such as walking, jumping, running and bobbing, and their vibration serviceability assessment is often a deciding factor in the design process. While simplified modelling of the human using a harmonic force was sufficient for assessment of vibration performance of more robust structures a few decades ago, the higher fidelity models are required in the contemporary design. These models are expected not only to describe both temporal and spectral features of the force signal more accurately, but also to capture the influence, psychological and physiological, of human-structure and human-human interaction mechanisms on the human kinematics, and consequently on the force generated and the resulting vibration response. Significant advances have been made in both the research studies and design guidance. This paper reports the key developments and identifies the scope for further research.

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Mitigation of human-induced vertical vibrations of footbridges through crowd flow control

Venuti

Reggio

2018

Struct Control Health Monit

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Modelling crowd–bridge dynamic interaction with a discretely defined crowd

Cited by 50 publications

References 13 publications

Modelling framework for dynamic interaction between multiple pedestrians and vertical vibrations of footbridges

Modelling framework for dynamic interaction between multiple pedestrians and vertical vibrations of footbridges

Modelling human actions on lightweight structures: experimental and numerical developments

Mitigation of human-induced vertical vibrations of footbridges through crowd flow control

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