Fatigue Performance of Cracked Tubular T Joints under Combined Loads. I: Experimental

Experiment investigation of stress concentration factor of concrete-filled tubular T joints

“…Those members are constantly subjected to the combined action of dynamic forces from waves, wind, current, and even seismic activity. When tubular structures are subjected under severe cyclic loading conditions in practice, fatigue cracks may develop resulting in fatigue damage [2]. This fatigue crack is always initiated at the weld toe of the brace to chord intersection areas in the tubular joints where high lever stress concentration is induced by the structural discontinuity.…”

Advanced Numerical Modeling of Cracked Tubular K Joints: BEM and FEM Comparison

“…From full scale test results on the T, Y and K-joints (Lie et al, 2003, Chiew et al 2004, Lie et al2005b, it is known that the crack front shape resembles a semi-ellipse on a normalized ' ' v -u plane. Hence, the crack front equation is first defined on a normalized space and then map onto the crack surface ( Figure 10, Lee et al 2005).…”

Stress Analysis and Fatigue Test on Partially Overlapped CHS K-Joints

“…The alternating current potential drop (ACPD) technique [7][8][9][10][11] was used to monitor the growth of surface crack at expected crack growth location. Based on the peak HSS locations detected during the static test, 32 ACPD probes were placed at equal intervals of 10mm along the weld toe of the through brace around curve C for Specimen S1 and around curve A for Specimen S2 ( Figure 5).…”