Evaluation of the dynamic behaviour of steel staircases damped by the presence of people

Cappellini, Anna Maria Chiara; Manzoni, Stefano; Vanali, Marcello; Cigada, Alfredo

doi:10.1016/j.engstruct.2016.02.028

Cited by 21 publications

(41 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, an excitation DOF where at least one mode cannot be properly excited is necessary to prove the efficiency of the approach. Cappellini et al analysed the same staircase [35] and showed that the second mode is characterized by a torsion. This means that the DOFs in the middle of the staircase have low eigenvector components (not perfectly null because the mode is not perfectly symmetric with respect to the longitudinal axis of the staircase).…”

Section: Validation Of the Multi-reference Approachmentioning

confidence: 99%

Global scaling of operational modal analysis modes with the OMAH method

Brandt

Berardengo

Manzoni

et al. 2019

Mechanical Systems and Signal Processing

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Validation Of the Multi-reference Approachmentioning

confidence: 99%

Global scaling of operational modal analysis modes with the OMAH method

Brandt

Berardengo

Manzoni

et al. 2019

Mechanical Systems and Signal Processing

Self Cite

View full text Add to dashboard Cite

show abstract

“…The GRF is the total force exchanged between the person and the structure. The GRF can be split into passive GRF (PGRF) and active GRF (AGRF) [7]. The PGRF is a force generated by structural movement; when an external force acts on the structure, it vibrates and excites the person.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…As for the AGRFs, it is possible to build a database of forces for the considered kind of movement (e.g., as in [7] for people ascending and descending staircases). Figure 2 shows some examples of the collected AGRF time-histories for people ascending and descending staircases.…”

Section: The Case Of Active Peoplementioning

confidence: 99%

Numerical Model for Human Induced Vibrations

Vanali

Berardengo

Manzoni

2017

Conference Proceedings of the Society for Experimental Mechanics Series

View full text Add to dashboard Cite

This paper proposes a new model for describing the effect of people on the dynamic behaviour of slender structures. The influence of people is described by using the so-called ground reaction forces. These are split into two types: passive ground reaction forces and active ground reaction forces. This enables to model the influence of both passive and active people occupying the structure. The experimental tests carried out on two different test-case structures allowed to validate the proposed approach, proving its reliability as well as its accuracy.

show abstract

“…Since the "wobbly" London Millennium Bridge brought this very problem in the limelight nearly two decades ago (Dallard et al 2001), an extensive amount of research has been carried out on dynamic walking excitation. Significant progress has been made on the characterization of the intrinsic variability in the load pattern of an individual (Živanovićet al 2007;Racićand Brownjohn 2011) and the population (Sahnaci and Kasperski 2005;Piccardo and Tubino 2012), and the related human-structure interaction (HSI) (Agu and Kasperski 2011;Ingólfsson et al 2012;Caprani and Ahmadi 2016;Shahabpoor et al 2016b;Cappellini et al 2016;Van Nimmen et al 2017) and human-human interaction (HHI) (Bruno et al 2011(Bruno et al , 2016 phenomena. Furthermore, although the procedures presented by current guidelines focus on the resonant footbridge response (AFGC 2006;Heinemeyer et al 2009a), recent observations indicate that also nonresonant contributions can be of significant importance to the overall dynamic performance (Dey et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Pedestrian-Induced Vibrations of Footbridges: An Extended Spectral Approach

et al. 2020

View full text Add to dashboard Cite

The vibration serviceability assessment of footbridges under pedestrian traffic requires a probabilistic approach considering the uncertainty in the dynamic behavior of the structure and the variability of multiple load parameters, such as the pedestrians' arrival time and step frequency. In view of engineering applications, a major challenge lies in the development, verification, and validation of efficient prediction models. With this challenge in mind, this paper uses a spectral approach to predict the dynamic response induced by unrestricted pedestrian traffic. A spectral load model available in the literature is extended to account for multiple harmonics of the vertical walking load and for application to arbitrary mode shapes. Furthermore, a closed-form expression is proposed to estimate the variance of the multimode structural response taking into account both resonant and nonresonant contributions. The performance of the proposed approach is evaluated for a simply supported beam as well as a real footbridge where multiple modes considerably contribute to the overall structural response. The results show that the proposed approach allows a good and mildly conservative estimate of the structural response to be obtained.

show abstract

Evaluation of the dynamic behaviour of steel staircases damped by the presence of people

Cited by 21 publications

References 24 publications

Global scaling of operational modal analysis modes with the OMAH method

Global scaling of operational modal analysis modes with the OMAH method

Numerical Model for Human Induced Vibrations

Pedestrian-Induced Vibrations of Footbridges: An Extended Spectral Approach

Contact Info

Product

Resources

About