Concepção e dimensionamento de pontes em madeira roliça para estradas vicinais na região sudoeste do Paraná

Abstract

This research aims to present recommendations for project design and construction’s provisions for the superstructure of bridges in roundwood, derived from reforestation wood with different spans, in order to provide engineers, architects, builders and designers, guidelines for design and construction of low cost bridges, with appropriate technology, safety, durability and sustentability. Technical knowledge in suitable timber structures is of fundamental importance for the design and construction of wooden bridges, in order to improve their performance and reduce costs. To do so, native species of eucalyptus were identified, as well as the treatment methods used. Furthermore, the study considered the farm machinery and vehicles used for transporting the agricultural products - usually grains - that need to cross those bridges, to obtain the loads for the design of the bridges. Thereby it was possible to determine the most appropriate structural model, and to make the necessary calculations for the design of these bridges. This structural system provides the economy and benefits the environment sustainably. It was observed that the width of the wooden bridges do not meet the dimensions of agricultural machinery from farmers in the region, nor the existing structural model is dimensioned to withstand the loads that are imposed on them.