Evidence map›Paper›PMID 34893627›Full record

ArticleNature communications2021

Emergence of the London Millennium Bridge instability without synchronisation.

Igor Belykh, Mateusz Bocian, Alan R Champneys, Kevin Daley, Russell Jeter, John H G Macdonald, Allan McRobie

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
3.4field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed, 42 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 4 countries.

Igor BelykhDepartment of Mathematics and Statistics, Georgia State University, Atlanta, GA, USA. ibelykh@gsu.edu.ORCID http://orcid.org/0000-0002-5683-0754
Mateusz BocianDepartment of Roads, Bridges, Railways and Airports, Wrocław University of Science and Technology, Wrocław, Poland.ORCID http://orcid.org/0000-0002-3539-5474
Alan R ChampneysDepartment of Engineering Mathematics, University of Bristol, Bristol, UK.
Kevin DaleyDepartment of Mathematics and Statistics, Georgia State University, Atlanta, GA, USA.ORCID http://orcid.org/0000-0003-2652-1675
Russell JeterDepartment of Mathematics and Statistics, Georgia State University, Atlanta, GA, USA.
John H G MacdonaldDepartment of Civil Engineering, University of Bristol, Bristol, UK.ORCID http://orcid.org/0000-0002-8950-6678
Allan McRobieDepartment of Engineering, University of Cambridge, Cambridge, UK.
Georgia State University · USUniversity of Bristol · GBUniversity of Cambridge · GBWrocław University of Science and Technology · PL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The pedestrian-induced instability of the London Millennium Bridge is a widely used example of Kuramoto synchronisation. Yet, reviewing observational, experimental, and modelling evidence, we argue that increased coherence of pedestrians' foot placement is a consequence of, not a cause of the instability. Instead, uncorrelated pedestrians produce positive feedback, through negative damping on average, that can initiate significant lateral bridge vibration over a wide range of natural frequencies. We present a simple general formula that quantifies this effect, and illustrate it through simulation of three mathematical models, including one with strong propensity for synchronisation. Despite subtle effects of gait strategies in determining precise instability thresholds, our results show that average negative damping is always the trigger. More broadly, we describe an alternative to Kuramoto theory for emergence of coherent oscillations in nature; collective contributions from incoherent agents need not cancel, but can provide positive feedback on average, leading to global limit-cycle motion.

Identifiers

PMID34893627
PMCPMC8664840
OpenAlexW4200022287

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.