An Analytical Study on the Pull-Out Strength of Anchor Bolts Embedded in Concrete Members by SPH Method

Abstract

As an important method for connecting structural members, anchor bolts have been installed in many situations. Therefore, accurate evaluation of the pull-out strength of anchor bolts has always been an important issue, considering the complicated actual installation conditions and the problem of aging deterioration of the structural members. In general, the patterns of pull-out failure of anchor bolts can be classified into three types: adhesion failure, cone failure, and bolt break. However, it sometimes shows a mixed fracture pattern, and it is not always easy to predict the accurate pull-out strength. In this study, we attempted to evaluate the pull-out strength of anchor bolts under various installation conditions using SPH, which can analyze the crack growth process in the concrete. In particular, the anchor bolt-concrete interface model was introduced to SPH analysis in order to consider the bond failure, and it was confirmed that various failure patterns and the load capacity could be predicted by proposed SPH method. After that, the influence of several parameters, such as bond stress limit, anchor bolt diameter, and the anchor bolt embedment depth on the failure patterns and the load capacity, were investigated by numerical calculation. Furthermore, several useful suggestions on the pull-out strength of anchor bolts under improper installation conditions, such as the ends of members for the purpose of seismic retrofitting, are presented.

A parametric finite element study of concrete cone failure in headed bars under tensile loading

“…However, due to the tiny space between the anchors, there was a superposition of the concrete cone failures, resulting in a complex double cone failure surface (Figures 13d, e, and f). Studies by Lu and Sonoda (2021) observed similar behavior. Additionally, the ultimate load values of the numerical models of the parametric study with edge and group effects were verified against the calculation model of the ACI 318 (2019) normative prescription.…”

Simulation of compound anchor intrusion in dry sand by a hybrid FEM+SPH method

“…There has been a growing interest in modeling the local interaction between anchors and soil with mesh-free techniques combined with a continuum mechanics approach, such as the Material Point Method (MPM) (Liang et al, 2021) and the Smoothed Particle Hydrodynamics (SPH) method (Woo et al, 2015;Wu et al, 2019;Lu and Sonoda, 2021). Other MPM applications include the simulation of avalanches (Vriend et al, 2013), the modeling of cone penetration in soils (Ceccato et al, 2017) and the design of locomotion systems in granular media (Ortiz et al, 2019).…”

Strengthening of RC Beams with CFC Panels for Improving Impact Resistance

“…In addition, the smoothed particle hydrodynamics (SPH) method developed by Gingold and Monaghan, and Lucy in 1977 [24,25], is a numerical technique and belongs to the category of mesh-free discretization techniques that could be used in continuum mechanics to simulate solid dynamics, including elasticity and plasticity [26]. Considering the advantage of SPH over FEM that it is easy to analyze the final fracture conditions accurately and realistically by taking advantage of the mesh-free method [27], SPH is often employed to analyze the impact behavior of structures [26,28].…”