In the last decades, numerous footbridges experienced excessive displacements in the lateral direction of passage, cases such as Millennium, Solferino and Toda among the most known, which caused that the pedestrian have difficulties in using these structures and often requiring expensive repairs. This research studies the problem of the lateral vibrations produced by the pedestrian crossing in footbridges known as the phenomenon of synchronous lateral excitation through the lateral vibration analysis of the walkway adjacent to the “Rayitos de Sol” footbridge, which crosses the Rímac river, near the center of Lima. This particular footbridge had presented excessive lateral vibrations from its construction in 2006, until 2016 when this research was developed. This particular situation constituted an ideal state for the development of experimental work. Particular details of the phenom...

En las últimas décadas del siglo XX e inicios del siglo XXI numerosos puentes peatonales experimentaron desplazamientos excesivos en la dirección lateral, causando en los peatones dificultades para cruzar el puente y muy frecuentemente requiriendo caras reparaciones. Esta investigación estudia el problema de las vibraciones laterales producidas por el cruce de peatones en puentes peatonales a través de modelos matemáticos representativos usados en la literatura técnica, y su comparación con resultados reales de mediciones y análisis de vibración lateral de la pasarela adyacente al puente peatonal “Rayitos de Sol” que cruza en rio Rímac cerca al centro de Lima. Este puente en particular presentaba excesivas vibraciones laterales desde su construcción en 2006 hasta el momento que fue desarrollada esta tesis en 2016. Esta situación particular constituyó un estado ideal par...

Accurate estimation of modal parameters of cable-stayed bridges plays a key role in evaluating the safety of these structures under dynamic loads such as traffic, wind and earthquakes. Furthermore, the difficulty in exciting this type of structure makes ambient vibration measurements a significant source of information to validate the developed full three-dimensional finite element models that are used to evaluate the dynamic response of this type of bridges. In this work, the Rayitos de Sol cable-stayed bridge was selected as a case study. To evaluate the modal parameters of the bridge, environmental vibration data were collected from strategic points on the platform. Using data recorded in the field, a series of system identification methods were carried out and then compared in the time and frequency domain. The collected data were analyzed based on only-output identification methods:...

In the last decades, numerous footbridges experienced excessive displacements in the lateral direction of passage, cases such as Millennium, Solferino and Toda among the most known, which caused that the pedestrian have difficulties in using these structures and often requiring expensive repairs. This research studies the problem of the lateral vibrations produced by the pedestrian crossing in footbridges known as the phenomenon of synchronous lateral excitation through the lateral vibration analysis of the walkway adjacent to the “Rayitos de Sol” footbridge, which crosses the Rímac river, near the center of Lima. This particular footbridge had presented excessive lateral vibrations from its construction in 2006, until 2016 when this research was developed. This particular situation constituted an ideal state for the development of experimental work. Particular details of the phenom...