Static Tests of Axially Loaded CHS KTKT-Joints

摘要

This paper reports the results of three static tests on tubular multi-planar KTKT-joints. The relevant geometry parameters investigated are: the diameter ratio beta, the chord thinness ratio gamma, and the out-of-plane angle PHI. The aim of the tests is to investigate the static behavior of the joints and to propose an ultimate capacity equation. From the test observations, it was found that failure of the specimens was due to plastification of the chord wall under the compressive braces. The behavior shows that compressive loads redistributed from the diagonal braces to the vertical braces after failure of the diagonal compressive braces. The interaction between the diagonal and vertical compressive braces is used to propose the ultimate capacity equation.