Abstracts Archive

Vibration serviceability under human-induced loading has become a key design criterion when determining the structural shape and dimension of footbridges. Over the last two decades, the vibration serviceability of footbridges under walking excitation has been widely investigated. However, little to ...

Authors: Laura Purpura, Hüseyin Güner, Sébastien Hoffait & Vincent Denoël. Nowadays, improvements in design and manufacturing methods and a more efficient use of structural materials make it possible to design slender and lighter structures such as footbridges. However, these lightweight structu...

Suspended footbridges are more vulnerable to flutter than suspension road bridges due to their lightweight, flexible, and slender structural features. To ensure proper flutter stability, it is necessary to precisely investigate the flutter characteristics of the flexible suspended footbridge. This s...

Slender footbridges are predominantly sensitive to human-induced vibrations. While in the past two decades the main focus was on pedestrian-induced vibrations, topical research questions investigate the dynamic impact of running actions. In comparison to the walking load, these running actions invol...

Human-induced vibrations in slender lightweight footbridges have been extensively investigated in the last 30 years. In existing guidelines, such as SETRA or HIVOSS, the dynamic response of a footbridge can be assessed considering the pedestrians as external non-interacting loads acting on the struc...

Despite extensive research in the last twenty years, there is still lack of reliable models for human-induced excitation, especially with reference to crowded conditions. Guidelines provide equivalent resonant uniformly-distributed loading with an increased loading amplitude for high density in orde...

Tibetan footbridges are very slender, light and flexible structures, and are used in mountainous terrains, often to overcome deep valleys. Consequently, these structures are very sensitive to the dynamic wind action, not only in terms of stability and ultimate resistance but also serviceability limi...

This paper presents a general approach for modelling human–structure interaction in the case of slender strctures. Vertical vibrations are addressed in the paper. The approach is based on a model of the complete system and on a solution procedure that is able to account for the most complex dynami...

The evolution of pedestrian bridge design is tending towards increasingly slender and flexible structures. As a result, these footbridges are more sensitive to vibrations caused by pedestrians. When designing them, it is needed to check their vibratory behaviour. For the comfort of pedestrians, meas...

Vibration serviceability (VS) under human-induced loading has become a key design criterion for footbridges, in particular involving crowded conditions. Decisive parameters in the VS assessment are the probability distribution function (PDF) of the step frequencies in the crowd and human-structure i...

Following a previous work [1], the paper describes the serviceability assessment of a footbridge over the Lambro River near Milano (Italy), based on the comparative analysis of on-field tests and of the outcome of the Hyvoss guidelines. The 3-span footbridge, for a bicycle-pedestrian mixed use, is 1...

The Author considers the dynamic analysis of the pedestrian crowd on the bridge. The key assumptions in this project are random values of the walking velocities, no interaction between pedestrians, and no traffic effects. The recurrent neural networks superimpose the weighted responses generated by ...

As part of the ‘Smart Circular Bridge for a circular built environment’, Interreg NWE project, three pedestrian and bicycle bridges are currently being developed. Built from an innovative bio-composite material the bridges promise to be fully recyclable. The bridge also innovates by incorporatin...

Human-induced loads may produce resonance when the forcing frequency coincides with the natural frequency of the system. In this work, the dynamic measurements performed on a pedestrian cable-stayed bridge in Uppsala, Sweden are presented. The dynamic properties of the system have been identified an...

Among the load scenarios considered for the serviceability assessment of human-induced footbridge vibrations, is that of the transient action of a single pedestrian or a small group of pedestrians. Although such action is stochastic due to the variability of gait parameters, Standards and Guidelines...

The hangers are the important element on suspension bridges that transfer the forces from the deck to the main cable. To verify their capacity and identify possible risks, the forces transferred by the hangers and the corresponding tension must be determined. However, this is often done using standa...

The further development and improvement of prediction models for crowd-induced vibrations of footbridges requires detailed information on representative operational loading data. This paper uses an inverse method to estimate the parameters that govern human-structure interaction from the resulting s...

The progressive incursion of increasingly resistant and lightweight materials in the construction industry added to the hypothesis of a global regeneration of urban structures based on new architectural and engineering requirements of greater technical and aesthetic demands, has generated that civil...

The increasing slenderness and lightness of modern footbridges make the vibration serviceability assessment a key aspect for their design and maintenance. Vibration assessment of footbridges relies on an in-depth knowledge of the footbridge dynamic behavior as well as on reliable models of human-ind...