| Title |
Study on the Evaluation of Design Strength for Branch-rotated joints in Cold-formed Square Hollow Sections governed by Web failure mode of main Chord |
| Authors |
Park Keum-Sung ; Bae Kyu-Woong ; Moon Tae-Sup |
| Keywords |
the branch-rotated ; web failure mode ; deformation limit ; T-joint ; design strength ; finite element method |
| Abstract |
The object of this paper is to evaluate the design strength T-joints made of cold-formed square hollow steel sections. The T-joint had the configuration that a branch member was oriented at 45 degrees to the main chord in the plane. This study focused on the branch-rotated T-joints governed by main chord web failure mode among the test result. ??Based on the test results of the branch-rotated T-joint in square hollow sections, the deformation limit was modified that it revaluated to be ultimate strength on the joints for 16.7 2γ(B/T) 33.3 and 0.63 β(b1/B) 0.7. Existing strength formulae for traditional T-joint were investigated to be main chord web failure for the branch-rotated T-joint, and this proposed design formula was based on column buckling theory considering the rounded corners of cold-formed square hollow sections. Finally, confidence in design strength in joints secured from comparison value of finite element method with value of test and theory. |