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000128157 020__ $$a978-3-89336-825-9
000128157 037__ $$aFZJ-2012-01052
000128157 041__ $$aEnglish
000128157 1001_ $$0P:(DE-Juel1)156196$$aZhang, Jun$$b0$$eCorresponding author$$ufzj
000128157 245__ $$aPedestrian fundamental diagrams: Comparative analysis of experiments in different geometries$$f2012-10-31
000128157 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbiliothek, Verlag$$c2012
000128157 300__ $$a103 S.
000128157 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s128157
000128157 3367_ $$02$$2EndNote$$aThesis
000128157 3367_ $$2DRIVER$$adoctoralThesis
000128157 3367_ $$2BibTeX$$aPHDTHESIS
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000128157 3367_ $$2ORCID$$aDISSERTATION
000128157 4900_ $$0PERI:(DE-600)2525100-4$$aSchriften des Forschungszentrums Jülich. IAS Series$$v14
000128157 502__ $$aUniversität Wuppertal, Diss., 2012$$bDr.$$cUniversität Wuppertal$$d2012
000128157 520__ $$aOver the last few decades, several approaches for modeling of pedestrian traffic have been proposed and developed. However, the existing empirical data are insufficient and have large discrepancies, which makes difficult for the quantitative validation of models, design and safety assessment of facilities. This thesis mainly analyze the pedestrian fundamental diagram describing the relation between crowd density, velocity and flow based on series of well-controlled laboratory experiments. The second chapter reviews the commonly used fundamental diagrams in handbooks. The differences and influence of them on facility designs are compared. Then the existing empirical studies on pedestrian fundamental diagrams are discussed especially for uni- and bidirectional pedestrian streams. In the third chapter, the experiment setup and the extraction of the pedestrian trajectories from video recordings are described. Four different measurement methods are taken to calculate the crowd density, velocity and specific flow. Their influences on the fundamental diagram are tested with the data obtained from the experiment of unidirectional flow. For the density ranges achieved in the experiment, minor effects are observed but the Voronoi method is able to resolve a finer structure of the diagram and to reveal a discontinuity. The fourth chapter deals with the analysis of experiments of uni-, bi-directional and merging flow based on the Voronoi method. The first two experiments were carried out in a straight corridor, whereas the third one were performed in a T-junction. The topographical information for density, velocity and specific flow, from which the boundary effect are observed, are extracted with Voronoi method. The specific concept is applicable to all types of flows in the density ranges observed in the experiments. Surprisingly, no difference is found for the fundamental diagrams of bidirectional flow with different modes of order. However, there is a sharp distinction between the fundamental diagrams of uni- and bidirectional flow. For the merging flow in a T-junction, the fundamental diagrams measured in front and behind the merging show also significant differences.
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