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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.2019.tde-08032019-084745
Document
Author
Full name
Deryon Lloyd de Souza Leite
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2018
Supervisor
Committee
Motta, Rosângela dos Santos (President)
Motta, Laura Maria Goretti da
Carrazedo, Ricardo
Title in Portuguese
Estudo de alternativas para atenuação de vibração e ruído em via permanente metroferroviária de base rígida em área urbana.
Keywords in Portuguese
Dinâmica das estruturas
Ferrovias subterrâneas
Metrô
Vias permanentes
Vibrações
Abstract in Portuguese
A preocupação com o impacto ambiental decorrente da implantação e operação de novas linhas metroferroviárias faz com que seja necessário o uso de sistemas que amorteçam as vibrações e atenuem os ruídos secundários oriundos deste modo de transporte. Uma solução de atenuação largamente empregada é o sistema massa-mola, composto por lajes de concreto armado, apoiadas sobre materiais resilientes. Este trabalho tem como objetivo o estudo de alternativas para mitigação da vibração da via permanente por meio do conhecimento da variabilidade das respostas dinâmicas e frequências naturais de sistemas massa-mola criados computacionalmente. Entre as soluções propostas tem-se o uso de concreto pesado na construção da laje flutuante. A avaliação foi realizada utilizando modelos numéricos calibrados com dados experimentais presentes nas revisões bibliográficas. Os resultados do estudo indicaram que as soluções propostas podem ser consideradas nos projetos de atenuação de vibração de via permanente.
Title in English
Study of alternatives for vibration and noise attenuation in permanent subway with slab track in urban area.
Keywords in English
Dynamics of structures
Permanent ways
Subway
Underground railways
Vibrations
Abstract in English
The concern with the environmental impact resulting from the implementation and operation of new subway lines makes it necessary to use systems that cushion the vibrations and attenuate the secondary noises from this mode of transportation. A widely used attenuation solution is the mass-spring system, composed of reinforced concrete slabs resting on resilient materials. The objective of this work is to study the alternatives for permanent vibration attenuation through the knowledge of the variability of the dynamic responses and natural frequencies of computationally created mass-spring systems. Among the proposed solutions is the use of heavy concrete for construction of the floating slab. The evaluation was performed using numerical models calibrated with experimental data from bibliographic reviews. The results of the study indicated that the proposed solutions can be considered in permanent vibration attenuation projects.
 
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Publishing Date
2019-03-11
 
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