Experimental and numerical analysis of cold-formed steel angles under tension and connected with bolts / Análise experimental e numérica de cantoneiras de aço formadas a frio, sob tração e conectadas por parafusos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This work is an experimental and numerical study of cold-formed steel angles connected with bolts and under tension loading. Due to the non-uniform straining of the tension- member when connected to the gusset plate, a debilitating phenomenon, known as the shear lag, takes place. This phenomenon is also investigated in this research. For the calculation of the ultimate capacity of a tension member, the failure of the net-section is verified, and shear lag taken into account through the efficiency factor (C ). In this study, a t total of 158 specimens were experimentally tested in the laboratory. The examination of the experimental data suggests that new parameters, other than those considered by the Brazilian and the AISC Standards, can be taken into account for the determination of the ultimate strength of cold-formed steel angles under tension. From the statistical treatment of the experimental data a new equation is proposed for the efficiency factor of the net section. The evaluation of the proposed equation is done using other experimental tests on cold-formed steel angles and performed by different researchers. The performance of the equation prescribed in the Brazilian and the AISC Standards is evaluated and compared C t with the lab tests carried out in this work. Finite element models are employed to simulate the numerical behavior of cold-formed steel angles under tension. The FE models take into consideration geometric and material non-linearity in a sequence of load steps until collapse of the steel angle takes place. The numerical results are compared with the experimental test giving good agreement

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estruturas estruturas estruturas metálicas

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