PSI - Issue 68

Lucie Malíková et al. / Procedia Structural Integrity 68 (2025) 225–230 L. Malíková et al. / Structural Integrity Procedia 00 (2025) 000–000

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parameters (such as the anchor embedment depth etc.) of the anchor/concrete structure can have a significant influence on the load-bearing capacity of the system. Thus, it is important to analyze how different parameters influences anchor/concrete failures and/or to propose suitable prediction models. Several current results can be found for instance in Stone and Carino (1983), Krenchel and Shah (1985), Eligehausen and Sawade (1989), Fuchs et al. (1995) or Elfgren et al. (2001) etc.

Nomenclature L air

length of the steel anchor outside the concrete substrate depth of the steel anchor embedded in the concrete substrate

L em L tot

total height of the concrete substrate inner radius of the steel anchor outer radius of the steel anchor radius of the concrete substrate

R 1 R 2 R 3 R C

radial distance for investigation of the tangential stress

thickness of the anchor’s basement

t

angle where the maximum tangential stress occurs

q max s qq

tangential stress s qq ,max maximum tangential stress

2. Geometry, materials, FE model For the numerical simulations, a cylindrical specimen was suggested with a cast-in anchor in its centre, see Fig. 1a together with Tab. 1, where the geometry together with the dimensions considered is presented. Due to the axial symmetry, only one cut of the specimen could be modelled by means of finite elements.

(a)

(b)

Fig. 1. A scheme of (a) one cut of the cylindrical concrete specimen with a cast-in steel anchor under tension with indicated radial distance for tangential stress investigations; (b) the polar coordinate system used for tangential stress investigations.

Tab. 1 shows which parameters were considered constant and which ones were varied. The goal of this study was to analyse how the thickness of the anchor’s basement affects the stress distribution in the specimen which is closely related to the concrete cone failure features. Thus, these values were considered in the range from 5 to 15 mm. Moreover, various radial distances (1, 2, 3 and 4 mm) for the tangential stress investigations were assumed.