Investigation of the Dynamic Properties of the Brooklyn Bridge

Ye, Qi; Fanjiang, Guang-Nan; Yanev, Bojidar

doi:10.1007/1-4020-3661-2_7

Cited by 3 publications

(2 citation statements)

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“…The results assisted the seismic evaluation of the bridge and its likely retrofit. Similar studies were conducted by Ye et al (2005) on the Brooklyn Bridge and Harik et al (1997) on a double-deck cantilever throughtruss bridge. Ermopoulos and Spyrakos (2006) and Spyrakos et al (2004) have tested historic railway steel truss bridges still in service, 1 Ph.D.…”

Section: Dynamic Testing In the Assessment Of Old Steel Bridgesmentioning

confidence: 66%

Modal Analysis for the Rehabilitation Assessment of the Luiz I Bridge

et al. 2014

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Dynamic testing in the condition assessment of existing bridges to support their rehabilitation and strengthening designs is becoming a common procedure, yet additional dynamic testing after rehabilitation is rare. Nevertheless, combining the results of dynamic testing before and after bridge rehabilitation produces unique and valuable information regarding changes occurred in a bridge's dynamic properties. Such dual testing would allow researchers to verify the behavior predicted at the design stage and to assess the stiffness variation, which would eliminate the need for mandatory field static testing. This article reports the modal analysis of a unique centenary steel-arch bridge that was recently rehabilitated and strengthened. The ambient vibration test conducted after the construction works is described, and the data are compared with those collected before the rehabilitation. Structural identification is completed by means of experimentally validated threedimensional (3D) finite-element (FE) models simulating both phases. The results bring to light important findings concerning variation in bridge stiffness, changes in the modal parameters, and the impact of support conditions and structure of decks in bridge dynamic properties.

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Section: Dynamic Testing In the Assessment Of Old Steel Bridgesmentioning

confidence: 66%

Modal Analysis for the Rehabilitation Assessment of the Luiz I Bridge

et al. 2014

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“…The oldest case for which there is technical reference was the collapse of the Broughton Bridge in the UK due to the dynamic loads induced by the harmonic march of 60 infantry soldiers crossing the structure [18]. Additionally, more recent incidents have been reported in this type of structure caused by anthropic solicitations, such as the cases of: The Wuhan Yangtze bridge, China [19]; Toda-Park bridge, Japan [17]; Pedro and Inês bridge, Coimbra-Portugal [19], [20]; Long Span steel bridge, Changi Airport-Singapore [13], [16]; Le Ponte del Mare, Pescara-Italy [20]; Goodwill bridge, Brisbane-Australia [21]; and Eeklo pedestrian bridge, Belgium [22], [23], among others [24].…”

Section: Introductionmentioning

confidence: 99%

A Multiaxial Test Framework for the Evaluation of Human Gait-Induced Loads on Lateral Harmonic Surfaces

Castillo,

Thomson,

Marulanda

2024

J. Phys.: Conf. Ser.

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The introduction of increasingly resistant and light-weight materials in the construction industry, coupled with the hypothesis of a global regeneration of urban structures with higher technical and aesthetic requirements, has resulted in civil structures such as bleachers, stairs, slabs, and foot-bridge being vulnerable to excessive vibrations due to dynamic loads, especially human-induced loads. These loads present adaptive phenomena due to structural vibrations generated by the coupling effects of Human-Structure Interaction (HSI). Two main aspects are considered in the effects of HSI: the change in dynamic properties of the structure due to the additional presence of non-stationary mass, and the degree of coupling between people in transit, as well as between them and the structure. Therefore, this paper focuses on the study of the last aspect considered through the development of a Dynamic Platform, the Human-Structure Interaction Multiaxial Test Framework (HSI-MTF), to acquire three-dimensional loads induced by human gait under the effects of lateral harmonic motions. An experimental campaign was conducted with a test subject to evaluate gait loads under lateral sinusoidal movements and on rigid surface. The lateral loads, and frequency content induced by the human gait during the HSI-MTF lateral surface displacement protocols were analyzed.

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