Nonlinear Finite Element Analysis of Pull-Out Test

by Niels Saabye Ottosen, Research Engr.; Riso National Lab., Engrg. Dept., Postbox 49, DK-4000, Roskilde, Denmark,

Serial Information: Journal of the Structural Division, 1981, Vol. 107, Issue 4, Pg. 591-603

Document Type: Journal Paper

Abstract: A specific pull-out test used to determine in-situ concrete compressive strength is analyzed. This test consists of a steel disc that is extracted from the structure. The finite element analysis considers cracking as well as strain hardening and softening in the pre- and post-failure region, respectively. The aim is to attain a clear insight into structural behavior. Special attention is given to the failure mode. Severe cracking occurs and the stress distribution is very inhomogeneous. However, large compressive forces run from the disc in a rather narrow band towards the support and this constitutes the load-carrying mechanism. The failure is caused by the crushing of the concrete in this region, and not by cracking.

Subject Headings: Finite element method | Cracking | Failure modes | Pullout behavior | Field tests | Compressive strength | Steel structures | Structural behavior

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