Conference Presentations by Elpida Georgiou
16th European Conference on Earthquake Engineering, 2018
An experimental campaign that studied the effectiveness of seismic retrofitting of existing struc... more An experimental campaign that studied the effectiveness of seismic retrofitting of existing structures was simulated and analyzed in DIANA finite element analysis (FEA) software. The retrofitting method that was studied is the conversion of selected bays into new infilled RC walls for the retrofitting of a multi-storey multi-bay RC frame building. The building was tested at the ELSA facility of the Joint Research Centre (JRC) in Ispra (Italy). It was a full-scale four-storey model tested with the pseudo-dynamic (PsD) method. The frames were designed and detailed for gravity loads only using different connection details between the walls and the bounding frame. The purpose of the experiments was the study of the effectiveness of the proposed retrofitting method, including the design of new infill walls and the contribution of dowels that connect the new infill wall to the existing RC frame. In DIANA FEA, 2D frames were modeled and nonlinear transient analyses were performed in order to simulate the experimental results. In this paper, the finite element models of the test specimen are described and presented along with a comparison of the numerical results to the experimental ones. The capabilities of the finite element models that simulated the experimental nonlinear cyclic behavior of the tested RC building are illustrated. Finally, conclusions are drawn regarding the effectiveness of the numerical models to capture the behavior of the proposed structural system.
Papers by Elpida Georgiou
HAL (Le Centre pour la Communication Scientifique Directe), Aug 25, 2014
The effectiveness of seismic retrofitting of multi-storey multi-bay RC-frame buildings by convert... more The effectiveness of seismic retrofitting of multi-storey multi-bay RC-frame buildings by converting selected bays into new walls through infilling with reinforced concrete (RC) was studied experimentally at the ELSA facility of the Joint Research Centre (JRC) in Ispra (Italy). A full-scale model was tested with the pseudo-dynamic (PsD) method and consisted of two four-storey (12m tall) three-bay (8.5m long) parallel frames linked through 0.15m slabs with the central bay (2.5m) infilled with a RC wall. The frames were designed and detailed for gravity loads only and are typical of similar frames built in Cyprus in the 1970´s. Different connection details and reinforcement percentages for the two infilled frames were used in order to study their effects in determining structural response. In order to analytically simulate the experimental response, two mathematical models were formulated differing at the level of modelling. The first model is a micromodel based on 2D finite elements while the second is a 3-D macro-model with line elements to model the bounding frame and shear wall elements to model the walls. In this paper the experimental model is described and experimental results are presented along with conclusions for the behaviour of the frame. Then, the two analytical models described above are presented along with comparison of the analytical results to the experimental ones. Finally, conclusions are drawn regarding the effectiveness of the analytical models to capture the behaviour of the proposed structural system.
Lecture notes in civil engineering, 2023
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Conference Presentations by Elpida Georgiou
Papers by Elpida Georgiou