Pull-Out Tests and Numerical
Simulations of Bonded Threaded
Anchors in Concrete Blocks
with Thermal Insulation Layer
D. Tomaszewicz, A. Jablonska-Krysiewicz, and M. Gryniewicz
Abstract The article presents the results of pull-out tests and computer simulations
of three-layer concrete block elements with an internal insulation layer made of
foamed polystyrene. The concrete block elements are fragments of an external layer
of a wall of traditional large-panel buildings. The purpose of the tests was to obtain the
ultimate destructive force of a connection. It is not desirable to check the carrying
capacity of such anchorages in a residential building. E.g., pull-out tests are the
destructive ones and can cause permanent damage to a wall. The durability of a
connection surface between the textured layer and other ones strictly depends on
the durability of near anchoring. The concrete block elements were designed using
C 12/15 class concrete in accordance with Eurocode 2. The connection of a threaded
steel anchor with concrete was made using “R-KER vinyl ester bonded anchor”
resin with an adhesion stress value of 7 N/mm2. The steel anchor is a threaded rod
with a diameter of Ø 12 mm made of steel grade 5.8. The computer simulations are a
conceptual proposal for modeling layered block elements in systems and connections
not used so far. A primary aim of them was a validation of the experimental tests and
a first attempt to the theoretical assessment of the single adhesive anchor strength.
In the numerical modeling, it was necessary to accurately model contact in joints,
like resin with concrete or resin with steel anchor. The assumed thickness of the
connection area is 2 mm in the computer simulations (theoretical space between a
concrete and an anchor outer surface in a connection). The threaded part of rods is
taken into account in FEM calculations.
Keywords Bonded anchors · Numerical simulation · Concrete block elements
D. Tomaszewicz (B)
Higher School of Agribusiness in Lomza, Studencka 19, 18-402 Lomza, Poland
e-mail: Dariusz.Tomaszewicz@poczta.wsa.edu.pl
A. Jablonska-Krysiewicz · M. Gryniewicz
Faculty of Civil and Environmental Sciences, Bialystok University of Technology, Wiejska 45E,
15-351 Bialystok, Poland
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
Z. Zembaty et al. (eds.), Environmental Challenges in Civil
Engineering, Lecture Notes in Civil Engineering 122,
https://doi.org/10.1007/978-3-030-63879-5_4
45
Simulations of Bonded Threaded
Anchors in Concrete Blocks
with Thermal Insulation Layer
D. Tomaszewicz, A. Jablonska-Krysiewicz, and M. Gryniewicz
Abstract The article presents the results of pull-out tests and computer simulations
of three-layer concrete block elements with an internal insulation layer made of
foamed polystyrene. The concrete block elements are fragments of an external layer
of a wall of traditional large-panel buildings. The purpose of the tests was to obtain the
ultimate destructive force of a connection. It is not desirable to check the carrying
capacity of such anchorages in a residential building. E.g., pull-out tests are the
destructive ones and can cause permanent damage to a wall. The durability of a
connection surface between the textured layer and other ones strictly depends on
the durability of near anchoring. The concrete block elements were designed using
C 12/15 class concrete in accordance with Eurocode 2. The connection of a threaded
steel anchor with concrete was made using “R-KER vinyl ester bonded anchor”
resin with an adhesion stress value of 7 N/mm2. The steel anchor is a threaded rod
with a diameter of Ø 12 mm made of steel grade 5.8. The computer simulations are a
conceptual proposal for modeling layered block elements in systems and connections
not used so far. A primary aim of them was a validation of the experimental tests and
a first attempt to the theoretical assessment of the single adhesive anchor strength.
In the numerical modeling, it was necessary to accurately model contact in joints,
like resin with concrete or resin with steel anchor. The assumed thickness of the
connection area is 2 mm in the computer simulations (theoretical space between a
concrete and an anchor outer surface in a connection). The threaded part of rods is
taken into account in FEM calculations.
Keywords Bonded anchors · Numerical simulation · Concrete block elements
D. Tomaszewicz (B)
Higher School of Agribusiness in Lomza, Studencka 19, 18-402 Lomza, Poland
e-mail: Dariusz.Tomaszewicz@poczta.wsa.edu.pl
A. Jablonska-Krysiewicz · M. Gryniewicz
Faculty of Civil and Environmental Sciences, Bialystok University of Technology, Wiejska 45E,
15-351 Bialystok, Poland
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
Z. Zembaty et al. (eds.), Environmental Challenges in Civil
Engineering, Lecture Notes in Civil Engineering 122,
https://doi.org/10.1007/978-3-030-63879-5_4
45