Numerical Assessment of Cast-in-Place Anchor Pullout Strength Regarding CCD Methodology

Reliable anchorage of cast-in-place headed bolts in unreinforced concrete is vital in structural
and industrial applications, where inaccurate strength predictions can compromise
safety and efficiency. This study develops and validates an elastic&ndashplastic concrete model
within LS-DYNA to assess the tensile performance of headed anchors with varying embedment
depth-to-diameter ratios. A parametric analysis is conducted, considering different
concrete strengths, anchor sizes, and steel yield strengths. The results show notable deviations
from the Concrete Capacity Design (CCD) method, particularly under high-strength
concrete and reduced embedment ratios. The CCD method underestimates capacity at
30&ndash40 MPa and overestimates it at 20 MPa. A correction coefficient is proposed to improve
embedment depth estimation. The findings offer practical guidance for safer and more
accurate anchor design.