Behavior analysis of bar gaps in welded YT-joints for rolled-steel circular hollow sections

AUTOR(ES)

Vieira, R.F., Requena, J.A.V., Freitas, A. M. S., Arcaro, V. F.

FONTE

Latin American Journal of Solids and Structures

DATA DE PUBLICAÇÃO

2010

RESUMO

We present a parametric analysis of gap variation between the lap brace and through brace of YT welded joints for rolled-steel circular hollow sections on plane steel structures. Our aim is to investigate the collapse behavior of YT-joints under lap brace axial compression. In particular, we focus on e/d0 ratios above 0.25 so bending moments can be taken into account during the design. We find that joint failure is primarily due to chord wall plastification (Mode A) and cross-sectional chord buckling (Mode F) in the region underneath the lap brace. Our joint design followed the Limit States Method, and our results were based on a comparative analysis of three different methods: an analytical solution derived from a set of international technical norms, an experimental analysis, and numerical modeling using Ansys as calibrated by our experimental results.

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