Pullout behavior of headed steel studs embedded in engineered cementitious composites: Experiment, simulation, and design

Le résumé fourni par la source

In steel-engineered cementitious composites (ECC) composite structures, headed steel studs commonly serve as shear connectors and anchors, and are subjected to tensile stresses . The pullout behavior of studs embedded in ECC significantly influences the mechanical performance of such composite systems . This study investigated the pullout behavior of headed steel studs in ECC by a combination of pullout tests and finite element (FE) simulations. Nine specimens with three different stud embedment lengths experienced pullout testing and primarily exhibited ECC cone breakout failure. The deformation and tensile load-bearing capacity of the specimens enhanced as the stud embedment length increased. The impacts of stud embedment length, ECC compressive strength , and stud diameter on the failure mode and tensile load-bearing capacity were examined by FE simulations. The increased ECC compressive strength led to an improved tensile load-bearing capacity in cases of ECC cone failure, while the stud diameter exhibited a negligible impact. Based on the test and simulation results, three calculation methods were proposed for predicting the tensile load-bearing capacity of studs in ECC. Among these, the traditional concrete capacity design (CCD) model and the influence factor model displayed superior fitting and prediction accuracy.

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