A simple element with an embedded strong discontinuity for modeling cohesive cracking of concrete is presented. The element differs from previous elements of the embedded type, in that a consistent stress field is obtained by direct enforcement of stress continuity…
A simple element with an embedded strong discontinuity for modeling cohesive cracking of concrete is presented. The element differs from previous elements of the embedded type, in that a consistent stress field is obtained by direct enforcement of stress continuity across the crack. The displacement disconti- nuity is modeled in an XFEM fashion; however, the discontinuous displacement field is special, allowing for the direct enforcement of stress continuity. This in turn allows for elimination of extra degrees of freedom necessary for describing the crack deformations, thus the element has the same number of freedoms as its continuous basis: CST. The good performance of the element is demonstrated by its ability to simulate three- point bending of a notched concrete beam. The advantage of the element is its simplicity and the straightfor- ward implementation of it. Handling situations with multiple cracks will not require further developments, al- though this is not demonstrated here.