Institute of Earthquake Engineering and Engineering Seismology

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Harmonized methodology for cross-border hazard and risk assessment of earthquake-induced landslides at regional scale
(Springer Science and Business Media LLC, 2025-03-25)
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Fotopoulou, Stavroula
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Bozzoni, Francesca
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Nonlinear analysis of an RC frame structure considering the effects of embedment on soil–structure interaction
(Faculty of Civil Engineering and Architecture Osijek, 2025-12-03)
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Bojadjiev, Jordan
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Experimental Verification of Innovative, Low-Cost Method for Upgrading of Seismic Resistance of Masonry Infilled Rc Frames
(MDPI AG, 2025-07-31)
Bojadjiev, Jordan
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Necevska Cvetanovska, Golubka
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Varevac, Damir
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Bojadjieva, Julijana
<jats:p>For the past few decades, during each disastrous earthquake, severe damage and poor seismic performance of masonry infilled RC frames, including many newly designed ones, have been reported extensively. Inherent problems related to analysis and design methods for tight-fit infilled frame structures have not yet been solved and are recognized as being far from satisfactory in terms of completeness and reliability. The primary objective of this research was to propose and test an innovative method that can effectively mitigate undesirable interaction damage to masonry infilled RC frame structures. This proposed technical solution consists of connection of the infill panel to the bounding columns with steel reinforcement connections deployed in mortar layers and anchored to the columns. This is practical, cheap and easy to implement without any specific technology, which is especially important for developing countries. A three story, two bay RC building model with the proposed connection implemented on the infill walls was designed and tested on the shake table at IZIIS in Skopje, N. Macedonia. The test results and design guidelines/recommendations from the proposed research are also expected to benefit the infrastructural development in other countries threatened by earthquakes, preferably in the Balkan and the Mediterranean region.</jats:p>
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Kinematic SSI effects on seismic performance of RC structures
(Croatian Association of Civil Engineers, 2024-09)
Petrov, Nikola
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Bojadjieva, Julijana
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Bojadjiev, Jordan
<jats:p>In seismic regions, understanding soil–structure interaction (SSI) is crucial. This study examines the SSI effects on a six-storey RC-frame building using American guidelines for soil types B and C as per Eurocode 8. Structural responses of a constant structural system under various soil types and embedment conditions are compared, revealing significant influences on seismic behaviour. The study employs linear-elastic analysis to demonstrate that local soil and embedment conditions decrease base shear forces but increase total horizontal displacements and inter-storey drifts. This study highlights the importance of considering local soil conditions and embedment configurations to ensure structural resilience in earthquake-prone areas.</jats:p>
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Решенија за ограничување од облогата и хидродинамичка стабилност на јаловишна брана
(Сплит- ХрватскФакултет за Градежништво Архитектура и Геодезија; Матице Хрватске 15, HR-21000 Сплит, 2023-12-12)
Mircevska Violeta
The study investigates the impact of reservoir lining on the hydrodynamic stability of a tailings dam. A 3D coupled fluid-solid finite element model was used for detailed seepage analyses based on conventional flow-net and steady seepage conditions. Pore pressure, stationary seepage velocities, static liquefaction and the ratio between manifested and critical hydraulic gradients were predicted under three different lining conditions. The highest potential for internal erosion and heave was observed in the lined reservoir and starter dam scenario. Although there are environmental benefits, the incorporation of liners in dam design requires a comprehensive engineering assessment of the negative hydrodynamic effects.
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Experimental dynamic damage assessment of PUFJ protected brick infilled RC building during successive shake table tests
(Polish Academy of Sciences Chancellery, 2023-03-02)
Chełmecki, Jarosław
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Rakicevic, Zoran
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Kwiecień, Arkadiusz
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Halici, Omer Faruk
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Vanian, Vachan
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Rehabilitation of SDOF systems under air blast loading with a modified negative stiffness amplifying damper
(Springer Science and Business Media LLC, 2022-04-08)
Kiran, K. K.
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Noroozinejad Farsangi, Ehsan
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Gharehbaghi, Vahidreza
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Bogdanovic, Aleksandra
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Shake table test of RC walls' coupling provided by slabs
(Centre for Evaluation in Education and Science (CEON/CEES), 2021)
Isaković, Tatiana
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Gams, M.
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Janevski, A.
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Rakićević, Z.
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Bogdanović, A.
<jats:p>When designed to the seismic load effects, reinforced concrete walls connected by slabs without coupling beams are usually considered cantilever walls. Several recent studies indicated that slabs themselves could provide strong coupling in some cases, and the walls could respond differently from cantilever walls. To study the slab-to-wall piers interaction, a shake table test of the half-scale three-story specimen was conducted within HORIZON 2020 SERA-TA project. The specimen consisted of four rectangular walls linked by three slabs. It was subjected to a series of seismic excitations of increasing intensity. In the last three tests, the nonlinear response of the slabs and wall piers was observed. At the strong seismic excitations, one pier was subjected to strong tensile, while the adjacent pier was subjected to strong compression forces. The crack pattern of piers was asymmetric and different from the cross-shaped damage pattern, typical for cantilever walls. The coupling of wall piers provided by slabs was considerably stronger than it was expected. The share of the overturning moment resisted by the frame action induced by the slabs was more than 50%. All slabs were fully activated and significantly damaged. Their damage was primarily flexural. The effective width of slabs was equal to their total width.</jats:p>
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Shake Table Testing of Self‐Centring Concentrically Braced Frames
(Wiley, 2021-09)
Goggins, Jamie
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Jiang, Yadong
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Broderick, Brian M.
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Salawdeh, Suhaib
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O'Reilly, Gerard J.
<jats:title>Abstract</jats:title><jats:p>The self‐centring system presented in this paper is a novel damage control technique designed to improve the resilience of concentrically braced frames (CBF) under seismic action. Namely, traditional CBFs can undergo large residual drifts following an earthquake event which can limit the opportunity for cost‐effective repair of the structure. Additionally, the gusset plates connecting the brace members to beams and/or columns can experience substantial rotations as a result of the compression buckling of the bracing members. Through the utilisation of post‐tensioning strands placed between flanges of beams, the novel self‐centring concentrically braced frame (SC‐CBF) system can return the frame to its original position after significant inelastic deformations experienced during large earthquakes, resulting in minimum residual drifts.</jats:p><jats:p>In this paper, shake table testing of the aforementioned SC‐CBF system subjected to realistic earthquake loading is presented. The research is carried out as part of the H2020 “Seismology and earthquake engineering research infrastructure alliance for Europe” SERA project. Four sets of bracing configurations, incorporating varying square hollow section (SHS) braces and gusset plates were utilised in the shake table testing. Uniaxial loading with varying shake table accelerations was executed and the structural response evaluated using data from strain gauges (SG), load cells (LC), displacement transducers and accelerometers. The measured results provide information on the important parameters such as the tensile and compressive strength of the braces, post‐buckling capacity, gusset plate strains and post‐tensioning force. These findings are then presented and the crucial local and global response performance emphasised.</jats:p>
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A new approach in simulation of soil-structure interaction problems including damper effects
(Inderscience Publishers, 2020)
Edip, Kemal
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Bogdanovic, Aleksandra
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Stojmanovska, Marta
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Poposka, Angela
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Farsangi, Ehsan Noroozinejad

Institute of Earthquake Engineering and Engineering Seismology

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