Vibration Excitation and Control of a Pedestrian Walkway by Individuals and Crowds
As part of a continuing study on effects of humans on loading and dynamic response of footbridges, a steel frame walkway has been the subject of studies on the effects of multiple pedestrians with respect to loading and response mitigation. Following finite element modeling and experimental modal an...
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| Format: | Article |
| Language: | English |
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Wiley
2005-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2005/857247 |
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| author | James Mark William Brownjohn Tao Neng Fu |
| author_facet | James Mark William Brownjohn Tao Neng Fu |
| author_sort | James Mark William Brownjohn |
| collection | DOAJ |
| description | As part of a continuing study on effects of humans on loading and dynamic response of footbridges, a steel frame walkway has been the subject of studies on the effects of multiple pedestrians with respect to loading and response mitigation. Following finite element modeling and experimental modal analysis to identify the low frequency vibration modes likely to be excited by normal walking, the variation of response with pedestrian density and of system damping and natural frequency with occupancy by stationary pedestrians were both studied. The potentially mitigating effect of stationary occupants is still not well understood and the study included direct measurement of damping forces and absorbed energy using a force plate. The various tests showed that energy dissipation measured directly was consistent with the observed change in damping, that vertical and lateral response both varied approximately with square root of number of pedestrians, and that the simple model of a human as a single mass-spring-damper system may need to be refined to fit observed changes in modal parameters with a crowd of humans present. Modal parameter changes with moving pedestrians were small compared to those with stationary pedestrians indicating that within limits, modal parameters for the empty structure could be used in analysis. |
| format | Article |
| id | doaj-art-cbcdea51fd244386be30501886bfe43b |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2005-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-cbcdea51fd244386be30501886bfe43b2025-02-03T05:48:26ZengWileyShock and Vibration1070-96221875-92032005-01-0112533334710.1155/2005/857247Vibration Excitation and Control of a Pedestrian Walkway by Individuals and CrowdsJames Mark William Brownjohn0Tao Neng Fu1School of Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, UKCivil Engineering and Building Department, Singapore Polytechnic, 500 Dover Road, 139651, SingaporeAs part of a continuing study on effects of humans on loading and dynamic response of footbridges, a steel frame walkway has been the subject of studies on the effects of multiple pedestrians with respect to loading and response mitigation. Following finite element modeling and experimental modal analysis to identify the low frequency vibration modes likely to be excited by normal walking, the variation of response with pedestrian density and of system damping and natural frequency with occupancy by stationary pedestrians were both studied. The potentially mitigating effect of stationary occupants is still not well understood and the study included direct measurement of damping forces and absorbed energy using a force plate. The various tests showed that energy dissipation measured directly was consistent with the observed change in damping, that vertical and lateral response both varied approximately with square root of number of pedestrians, and that the simple model of a human as a single mass-spring-damper system may need to be refined to fit observed changes in modal parameters with a crowd of humans present. Modal parameter changes with moving pedestrians were small compared to those with stationary pedestrians indicating that within limits, modal parameters for the empty structure could be used in analysis.http://dx.doi.org/10.1155/2005/857247 |
| spellingShingle | James Mark William Brownjohn Tao Neng Fu Vibration Excitation and Control of a Pedestrian Walkway by Individuals and Crowds Shock and Vibration |
| title | Vibration Excitation and Control of a Pedestrian Walkway by Individuals and Crowds |
| title_full | Vibration Excitation and Control of a Pedestrian Walkway by Individuals and Crowds |
| title_fullStr | Vibration Excitation and Control of a Pedestrian Walkway by Individuals and Crowds |
| title_full_unstemmed | Vibration Excitation and Control of a Pedestrian Walkway by Individuals and Crowds |
| title_short | Vibration Excitation and Control of a Pedestrian Walkway by Individuals and Crowds |
| title_sort | vibration excitation and control of a pedestrian walkway by individuals and crowds |
| url | http://dx.doi.org/10.1155/2005/857247 |
| work_keys_str_mv | AT jamesmarkwilliambrownjohn vibrationexcitationandcontrolofapedestrianwalkwaybyindividualsandcrowds AT taonengfu vibrationexcitationandcontrolofapedestrianwalkwaybyindividualsandcrowds |