Finite Element Modelling of Anchorage to Concrete Systems at Different Strain Rates

Abstract

Demand for flexibility in design and faster construction times has resulted in the increasing use of fasteners in a variety of concrete structures. These structures are exposed to static and dynamic loading conditions. Furthermore, these structures can be exposed to high strain rate loading such as encountered in impact and blast loads. Thus, anchorage systems used to fasten elements to concrete structures are also exposed to the high strain rates of loading which can be tensile and shear loads. If not adequately designed and constructed, anchorages can fail in a catastrophic manner and pose significant threat to building safety and the life of building occupants.Behaviour of anchors embedded into concrete and subjected to static load has been widely investigated experimentally. However, despite the fact that many structures that contain anchorage systems are exposed to dynamic loads, the research in this vital area is limited.

Influence of Anchor Depth and Friction Coefficient Between Anchor and Rock on the Trajectory of Rock Masses Detachment

“…The issue of the influence of the depth of anchoring on the formation of the angle of the cone of destruction a and the shape of the fracture trajectory (which affects the potential volume Simulations showed a weak effect of anchorage depth (in the considered range of values of this parameter) on the extent of the fracture (failure surface) which slightly deviates from the signaled relationships found in concretes, especially for much larger anchorage depths than realized by studies [49,50] and realized by the presented numerical studies. However, the presented results of the study are consistent with the results of extensive research [51], where the dependence of the failure cone angle but on the anchor pull-out rate (the rate of inflicted deformation of the rock) was demonstrated, while no such dependence on the depth of anchorage was found.…”