SOBRE O COMPORTAMENTO ESTRUTURAL E O DIMENSIONAMENTO DE CANTONEIRAS PULTRUDADAS PRFV SUBMETIDAS À COMPRESSÃO

Resumo

With high values of strength-weight ratio, non-corrosivity and low levels of electrical
conductivity, glass fiber reinforced polymer (GFRP) pultruded profiles have been attracting interest in
the civil construction market. Although promising as structural elements, further research is needed,
especially on the design approach. Given the singularities of the angle profiles – widely discussed in the
context of steel structures – this paper presents a brief review of the mechanical behavior of GFRP
pultruded angles columns and a theorical analysis of predicted strengths from design standards. Almost
90 experimental results of angles subjected to compression were summarized and compared to the
predicted strengths from pre-standard for pultruded GFRP structures, design standard for steel members,
variations of normative approaches and proposed procedures in literature. A total of 14 procedures were
compared using the model error parameter. The results allowed to conclude that, among the available
procedures for pultruded profiles, the consideration of the shear effect and the use of the classical
flexural-torsional equation guarantee greater accuracy of the theoretical prediction. Although steel
procedures do not present clear advantages, the similarity observed between the mechanical behavior of
steel and pultruded angles leads to believe that, from adjustments to the resistance curves due to the
material characteristics, more sophisticated procedures than the current ones for pultruded columns can
be proposed.