Reavaliação do trem-tipo à luz das cargas reais nas rodovias brasileiras. / Re-assessment of bridge load model based on traffic data of Brazilian highways.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This work presents a model to verify the design traffic load model of the Brazilian code, based on real traffic at road bridges. First, it compares Brazilian load model with Eurocode 1 and AASHTO Standard and LRFD Specifications. Then, recent development and research on bridge traffic load models are presented, in Brazil and other countries. A verification model of the traffic load is proposed, based on quantity and weight vehicle simulations, using Monte Carlo method. Real traffic data of trucks, used in this work, have been collected at highways of Sao Paulo state. Box-girder bridges from 30 to 200 m spans are investigated, studying the bending moment at midspan and the shear forces near the supports, on simply supported bridges, and the bending moment at center support, on two-span continuous bridges. Traffic jam situations on the bridge are emphasyzed, and statistical extrapolations to the load effects carachteristic values are done. Finally, it presents an extension of this study to multi-beam cross sections, using transverse influence lines, in a 30 m span bridge, without transverse beams.

ASSUNTO(S)

trucks veículos de carga normas técnicas standardization carregamentos nas estruturas highway bridges loads on structures pontes rodoviárias

ACESSO AO ARTIGO

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