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Advances in Concrete Construction
  Volume 1, Number 3, October 2013 , pages 253-272

Simulation of experiments on RC frames strengthened with dissipative steel links
Kyriaki Georgiadi-Stefanidi, Euripidis Mistakidis and Kosmas Athanasios Stylianidis

    The use of steel bracing systems is a popular method for the strengthening of existing reinforced concrete (RC) frames and may lead to a substantial increase of both strength and stiffness. However, in most retrofitting cases, the main target is the increase of the energy dissipation capacity. This paper studies numerically the efficiency of a specific strengthening methodology which utilizes a steel link element having a cross-section of various shapes, connected to the RC frame through bracing elements. The energy is dissipated through the yielding of the steel link element. The case studied is a typical one bay, single-storey RC frame, constructed according to older code provisions, which is strengthened through two different types of link elements. The presented numerical models are based on tests which are simulated in order to gain a better insight of the behaviour of the strengthened structures, but also in order to study the effects of different configurations for the link element. The behaviour of the strengthened frames is studied with respect to the one of the original bare frame. Moreover, the numerically obtained results are compared to the experimentally obtained ones, in order to verify the effectiveness of the applied simulation methodology.
Key Words
    strengthening; non-linear analysis; concrete structures; earthquake engineering; finite elements method
Kyriaki Georgiadi-Stefanidi and Euripidis Mistakidis: Laboratorty of Structural Analysis and Design, Department of Civil Engineering, University of Thessaly, Pedion Areos, GR-38334 Volos, Greece
Kosmas Athanasios Stylianidis: Laboratory of Reinforced Concrete and Masonry Structures, Department of Civil Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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