Computer Simulation of Pull-Out Tests of Headed Anchors in a State of Plane-Stress


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Title: Computer Simulation of Pull-Out Tests of Headed Anchors in a State of Plane-Stress

Author(s): Radomir Pukl, Rolf Eligehausen, and Vladimir Cervenka

Publication: Special Publication

Volume: 134


Appears on pages(s): 79-100

Keywords: anchors (fasteners); computer programs; cracking (fracturing); fracture properties; models; modulus of elasticity; pullout tests; stresses; tests; Design

Date: 9/1/1992

Computer analyses of the pullout tests of anchors embedded in concrete were performed for the Round Robin Analysis of the RILEM Committee on Fracture Mechanics of Concrete. The test specimens were concrete plates with steel anchors in the plane stress state. The geometry of the specimen was varied in order to study the size effect and the shape effect. The investigation was performed by means of the computer simulation of the tests. Only limited comparison with the real laboratory experiments was used to verify the results. The computer simulation was made by means of the program SBETA, which was developed by the authors and is based on the smeared crack approach and the nonlinear elasticity. Two crack models were used to analyze each specimen: the rotated crack model and the fixed crack model. In total, 36 computer simulations were made. Each simulation provided the load-displacement diagram of the anchor and a sequence of crack patterns, deformed states, and stress states. A size effect law in the exponential form was derived from the computer experiments.