Search Results - "Macdonald, John H.G"

Lateral excitation of bridges by balancing pedestrians by Macdonald, John H.G

“…On its opening day, the London Millennium Bridge (LMB) experienced unexpected large amplitude lateral vibrations due to crowd loading. This form of…”
Get full text

Closed form solution of Eigen frequency of monopile supported offshore wind turbines in deeper waters incorporating stiffness of substructure and SSI by Arany, Laszlo, Bhattacharya, S., Macdonald, John H.G., Hogan, S. John

“…Offshore wind turbines (OWTs) are dynamically loaded structures and therefore the estimation of the natural frequency is an important design calculation to…”
Get full text

Separation of the contributions of aerodynamic and structural damping in vibrations of inclined cables by Macdonald, John H.G

“…Large amplitude cable vibrations have occurred on several major cable-stayed bridges. Complex mechanisms including rain-wind excitation and possibly cable–deck…”
Get full text

Identification of flutter derivatives from full-scale ambient vibration measurements of the Clifton Suspension Bridge by Nikitas, Nikolaos, Macdonald, John H.G, Jakobsen, Jasna B

“…The estimated response of large-scale engineering structures to severe wind loads is prone to modelling uncertainties that can only ultimately be assessed by…”
Get full text

Identification of flutter derivatives from full-scale ambient vibration measurements of the Clifton Suspension Bridge by Nikitas, Nikolaos, Macdonald, John H.G., Jakobsen, Jasna B.

“…The estimated response of large-scale engineering structures to severe wind loads is prone to modelling uncertainties that can only ultimately be assessed by…”
Get full text

Calibration of inverted pendulum pedestrian model for laterally oscillating bridges based on stepping behaviour by Czaplewski, Bronisław, Bocian, Mateusz, Macdonald, John H.G.

Get full text

Determinants of pedestrian mediolateral foot placement in walking on laterally-oscillating structures and their consequences for structural stability by Bocian, Mateusz, Wdowicka, Hanna, Burn, Jeremy F., Macdonald, John H.G.

“…An active control of foot placement in the frontal plane is required to maintain balance during walking. It has been previously shown that, for walking on…”
Get full text

Modelling a uniaxial inerter in a 2D or 3D environment: Implications of centripetal acceleration by Zhu, Ming, Macdonald, John H.G., Jiang, Jason Zheng, Neild, Simon A.

Get full text

Structural damage detection based on multivariate probability density functions of vibration data of offshore wind foundations with comparison studies by Zhang, Yulong, Pan, Zuxing, Macdonald, John H.G., Liu, Song, Harper, Paul

“…A multivariate probability density function (PDF) is developed based on the stochastic process of vibration responses from a single sensor on a structure, and…”
Get full text

Identification of optimum cable vibration absorbers using fixed-sized-inerter layouts by Luo, Jiannan, Macdonald, John H.G., Jiang, Jason Zheng

“…•Using network synthesis, two forms of fixed-size-inerter absorbers are introduced.•The approach covers a wide range of candidate layouts with specified…”
Get full text

Cable Vibration Suppression with Inerter-Based Absorbers by Luo, Jiannan, Jiang, Jason Zheng, Macdonald, John H. G

“…AbstractStay cables are prone to vibrations due to their low inherent damping. This paper presents an approach for systematic identification of beneficial…”
Get full text

Unsteady aerodynamic force modelling for 3-DoF-galloping of four-bundled conductors by Matsumiya, Hisato, Yagi, Tomomi, Macdonald, John H.G.

“…Galloping of overhead transmission lines is characterised by large-amplitude, low-frequency, vertical–horizontal–torsional three degree-of-freedom (DoF)…”
Get full text

Effects of aerodynamic coupling and non-linear behaviour on galloping of ice-accreted conductors by Matsumiya, Hisato, Yagi, Tomomi, Macdonald, John H.G.

“…Wind action on ice-covered transmission lines causes galloping, which is a problem because it can introduce interphase short circuits and cause fatigue of the…”
Get full text

Nonlinear dynamics of deep water subsea lifting operations considering KC-dependent hydrodynamic coefficients by Tommasini, Rodrigo Batista, Hill, Thomas L., Macdonald, John H.G., Pavanello, Renato, Carvalho, Leonardo de Oliveira

“…The dynamics of deep water subsea lifting operations considering hydrodynamic coefficients that depend on the Keulegan-Carpenter (KC) number are analysed in…”
Get full text

An analytical solution for the galloping stability of a 3 degree-of-freedom system based on quasi-steady theory by He, Mingzhe, Macdonald, John H.G.

“…The aerodynamic forces on a two-dimensional three-degree-of-freedom (3DOF-heave, sway and torsion) body of arbitrary cross-section are considered, for…”
Get full text

Galloping of an elliptical cylinder at the critical Reynolds number and its quasi-steady prediction by Ma, Wenyong, Macdonald, John H.G., Liu, Qingkuan, Nguyen, Cung H., Liu, Xiaobing

“…Dry galloping of inclined cables has been shown to have a strong relation to the critical Reynolds number. This study considers the occurrence of galloping of…”
Get full text

Emergence of the London Millennium Bridge instability without synchronisation by Belykh, Igor, Bocian, Mateusz, Champneys, Alan R., Daley, Kevin, Jeter, Russell, Macdonald, John H. G., McRobie, Allan

“…The pedestrian-induced instability of the London Millennium Bridge is a widely used example of Kuramoto synchronisation. Yet, reviewing observational,…”
Get full text

Damage detection of nonlinear structures using probability density ratio estimation by Zhang, Yulong, Macdonald, John H.G., Liu, Song, Harper, Paul W.

“…This study focuses on vibration‐based damage detection for a structure that has nonlinear behavior even in the undamaged state. Based on the vibration…”
Get full text

Identification of varying modal parameters of a tall building from the full-scale wind-induced responses by Gonzalez-Fernandez, Daniel, De Risi, Raffaele, Rezgui, Djamel, Macdonald, John H.G., Margnelli, Alessandro, Titurus, Branislav

“…The dynamic behaviour of a tall building can change notably during the construction phases, under the varying degree of occupation, loading patterns, wind…”
Get full text

Experimental identification of the behaviour of and lateral forces from freely-walking pedestrians on laterally oscillating structures in a virtual reality environment by Bocian, Mateusz, Macdonald, John H.G., Burn, Jeremy F., Redmill, David

“…•A novel setup for investigating pedestrian–structure interaction is presented.•Foot-placement is the main balance control mechanism on laterally vibrating…”
Get full text