Numerical Models Validation of Cracked Square Hollow Section (SHS) Y- and /f-Joints

摘要

to validate the accuracy of finite-element models of cracked square hollow section (shs) y- and a"-joints; two full-scale precracked specimens were tested under static incremental loads up to failure. the load-displacement curves were plotted during the tests; and a set of linear variable displacement transducers (lvdts) were used to record the crack mouth opening displacements (cmod) at the deepest points; whereas the crack extension was captured using the standard alternating current potential drop (acpd) technique. the experimental results are compared with the corresponding numerical results obtained using the nonlinear finite-element method. both sets of results show good agreement with maximum percentage differences of 7.15 and 7.96% for the plastic collapse loads and crack mouth opening displacements; respectively. hence; the numerical model adopted previously for the cracked shs 7-joints is robust and can also be used to estimate the plastic collapse load pc and crack driving force jep of any uniplanar tubular cracked y- and a"-joints.