Studies for controlling human-induced vibration of the Pedro e Ines footbridge, Portugal. Part 1: Assessment of dynamic behaviour

被引：117

作者：

Caetano, Elsa ^{[1
]}

Cunha, Alvaro ^{[1
]}

Magalhaes, Filipe ^{[1
]}

Moutinho, Carlos ^{[1
]}

机构：

[1] Univ Porto, Fac Engn, P-4200465 Oporto, Portugal

来源：

ENGINEERING STRUCTURES | 2010年 / 32卷 / 04期

关键词：

Human induced loads; Footbridge vibrations; Experimental tests; Lock-in; Ambient vibration tests; Free vibration tests; Damping; Control of vibrations; Tuned mass dampers;

D O I：

10.1016/j.engstruct.2009.12.034

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The construction in Portugal of a relatively long and slender footbridge prone to vertical and lateral vibrations induced by the action of pedestrians motivated the full assessment of the corresponding dynamic behaviour with the purpose of installing a control system. The current paper describes the studies undertaken at a design stage and the results of a thorough experimental assessment of the constructed bridge properties This experimental test allowed in particular the identification of modal parameters and the observation of the lateral "lock-in" effect under the crossing of the footbridge by pedestrian streams prior to installation of control devices The number of pedestrians to trigger lock-in was found to verify the formula developed within the Millennium bridge studies. Furthermore, the full characterisation of the bridge behaviour was of utmost importance in the design of a control system based on tuned mass dampers that is discussed in a companion paper. (C) 2009 Elsevier Ltd All rights reserved.

引用

页码：1069 / 1081

页数：13

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