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Advisor(s)
Abstract(s)
O presente trabalho pretende avaliar as diferenças de efeitos que os modelos de sobrecarga rodoviária
de dez regulamentos (RSA, EC1-2, NBR, AASHTO, SATCC, CSA, IRC:6, SNiP, Manual de Hong
Kong, NCP) provocam em pontes rodoviárias de pequeno a médio vão.
Numa primeira parte são cobertas questões relacionadas com os efeitos dinâmicos em pontes
referenciando-se diversos estudos. Em seguida são apresentados os principais fatores que influenciam
os efeitos das sobrecargas rodoviárias.
Os modelos de sobrecarga rodoviária, definidos nos diversos regulamentos, são descritos
pormenorizadamente com o objetivo de clarificar e facilitar a sua aplicação. No que se refere à
componente numérica do trabalho, a quantificação dos efeitos que cada modelo origina foi realizada
através da modelação em elementos finitos de tabuleiros de comprimento variável entre 10 e 40 metros.
Longitudinalmente analisaram-se os valores máximos do momento fletor e do esforço transverso, e
numa análise transversal estudaram-se os valores máximos de momentos fletores positivos e negativos
originados em cada tabuleiro. No capítulo 7 é realizada uma análise comparativa dos efeitos causados
pelos modelos de sobrecarga rodoviária definidos em cada regulamento tomando como referência os
valores obtidos pelo RSA.
The present work intends to evaluate the differences between the effects produced by the roadway live load models prescribed in ten design codes (RSA, EC1-2, NBR, AASHTO, SATCC, CSA, IRC: 6, SNiP, Hong Kong Manual, NCP) on short to medium span road bridges. The first part deals with the issues related with dynamic effects on bridges, referencing various studies. Then, the mains factors influencing road traffic loads are presented. The roadway live models defined in the various codes were described in detail in order to work it noticeable and easy to apply. In relation to the numerical component, several decks with a variable span length between 10 and 40 meters were modelled using finite elements models for the quantification of the effects. Longitudinally the maximum values of bending moment and shear force were analyzed, and the maximum positive and negative bending moment originated in each deck were studied in a crosssectional analysis. The results for each live load model, presented in the seventh chapter, were compared to the effects created by the Portuguese live load model.
The present work intends to evaluate the differences between the effects produced by the roadway live load models prescribed in ten design codes (RSA, EC1-2, NBR, AASHTO, SATCC, CSA, IRC: 6, SNiP, Hong Kong Manual, NCP) on short to medium span road bridges. The first part deals with the issues related with dynamic effects on bridges, referencing various studies. Then, the mains factors influencing road traffic loads are presented. The roadway live models defined in the various codes were described in detail in order to work it noticeable and easy to apply. In relation to the numerical component, several decks with a variable span length between 10 and 40 meters were modelled using finite elements models for the quantification of the effects. Longitudinally the maximum values of bending moment and shear force were analyzed, and the maximum positive and negative bending moment originated in each deck were studied in a crosssectional analysis. The results for each live load model, presented in the seventh chapter, were compared to the effects created by the Portuguese live load model.
Description
Keywords
Modelo de sobrecarga rodoviária Regulamentos de estruturas Ponte rodoviária Esforço máximo Tabuleiro Comparação de resultados Roadway live load model Structural regulamentations Road bridge Maximum effects Deck Comparison results