Análise numérica da influência do comprimento de placa em pavimentos de concreto simples
Carregando...
Tipo
TCC
Data de publicação
2021-06-21
Periódico
Citações (Scopus)
Autores
Abreu, Anna Paula Rodrigues de
Orientador
Silva, Eric Ribeiro da
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Programa
Resumo
A fim de investigar a influência de parâmetros construtivos no comportamento mecânico do pavimento de concreto simples, o programa de elementos finitos EverFE foi empregado na análise numérica de tensões nas placas de concreto e na base cimentada. As simulações numéricas envolveram a análise de três fatores principais: comprimento de placa; diferenciais térmicos característicos de clima tropical; e aderência entre a placa e a base cimentada. Os resultados obtidos foram comparados com estudos que buscaram investigar as tensões em pavimentos de concreto simples sujeitos ao clima tropical, reforçando a afirmação de que a magnitude de diferencial térmico característica de clima tropical ocasiona incrementos significativos nas tensões críticas nas placas de concreto. Para diferenciais térmicos mais elevados (como 20 a 25°C), a aderência entre as placas de concreto, de comprimento superior a 4 m e a base cimentada ocasiona um efeito significativo na redução das tensões críticas nas placas, embora cause incremento nas tensões na base cimentada. No caso das placas de concreto de 4 m de comprimento, os resultados mostraram que para diferenciais térmicos de maior magnitude a contribuição da aderência entre as placas e a base cimentada na redução de tensões nas placas de concreto é pouco significativa, mas causam incrementos expressivos de tensão na camada de base.
In order to investigate the influence of construction parameters on the mechanical behaviour of the jointed plain concrete pavement, the finite element program EverFE was used to generate numerical analysis of stresses in the concrete slabs and cement-treated base. The numerical simulations involved the analysis of three main factors: slab length; thermal differentials accordingly to a tropical climate; and slab/base interface bond conditions. The obtained results were compared with studies that sought to investigate the stresses in jointed plain concrete pavements subject to tropical climate, reinforcing the assertion that the magnitude of thermal differential characteristic of tropical climate causes significant increase in critical stresses in the concrete slabs. For higher thermal differentials (such as 20 to 25°C), the adhesion between the concrete slabs longer than 4 m and the cement-treated base causes a significant effect in reducing the critical stresses in the concrete slabs, although it causes an increase in the stresses in the cement-treated base. In the case of concrete slabs of 4 m in length, the results showed that for thermal differentials of greater magnitude the contribution of the adhesion between the slabs and the cement-treated base in the reduction of stresses in the concrete slabs is not significant, but they cause significant increases in tension in the base layer.
In order to investigate the influence of construction parameters on the mechanical behaviour of the jointed plain concrete pavement, the finite element program EverFE was used to generate numerical analysis of stresses in the concrete slabs and cement-treated base. The numerical simulations involved the analysis of three main factors: slab length; thermal differentials accordingly to a tropical climate; and slab/base interface bond conditions. The obtained results were compared with studies that sought to investigate the stresses in jointed plain concrete pavements subject to tropical climate, reinforcing the assertion that the magnitude of thermal differential characteristic of tropical climate causes significant increase in critical stresses in the concrete slabs. For higher thermal differentials (such as 20 to 25°C), the adhesion between the concrete slabs longer than 4 m and the cement-treated base causes a significant effect in reducing the critical stresses in the concrete slabs, although it causes an increase in the stresses in the cement-treated base. In the case of concrete slabs of 4 m in length, the results showed that for thermal differentials of greater magnitude the contribution of the adhesion between the slabs and the cement-treated base in the reduction of stresses in the concrete slabs is not significant, but they cause significant increases in tension in the base layer.
Descrição
Palavras-chave
pavimento de concreto simples , análise numérica , comprimento de placa , simple jointed concrete pavement , numerical analysis , plate length