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A review on the shear performance of reinforced concrete (RC) beams strengthened with externally bonded mortar-based composites (2023)
Journal Article
Liu, X., & Thermou, G. E. (2023). A review on the shear performance of reinforced concrete (RC) beams strengthened with externally bonded mortar-based composites. Structures, 58, Article 105474. https://doi.org/10.1016/j.istruc.2023.105474

This paper reviews the performance of shear strengthened reinforced concrete (RC) beams with the use of externally bonded mortar-based composite jackets (e.g. FRCM, ECC, UHPFRC). An experimental database was compiled gathering all the known studies i... Read More about A review on the shear performance of reinforced concrete (RC) beams strengthened with externally bonded mortar-based composites.

BIM-based building circularity assessment: conceptual framework (2023)
Conference Proceeding
Al-Qazzaz, I., Osorio-Sandoval, C., Tokbolat, S., & Thermou, G. (2023). BIM-based building circularity assessment: conceptual framework. In Proceedings of the 20th International Conference on Sustainable Energy Technologies (130-137)

The construction sector contributes substantially to the consumption of raw materials and the production of waste. Traditional building design strategies are based on an unsustainable economic linear model. Transition to the circular economy (CE) par... Read More about BIM-based building circularity assessment: conceptual framework.

A BIM-based framework for designing sustainable structures through the reuse of precast concrete components (2023)
Conference Proceeding
Al-Jawhar, H., Thermou, G., Osorio-Sandoval, C., & Tokbolat, S. (2023). A BIM-based framework for designing sustainable structures through the reuse of precast concrete components. In Proceedings of the 20th International Conference on Sustainable Energy Technologies (201-210)

The widespread use of concrete within the global construction sector is primarily attributed to its inherent qualities of resilience, versatility, longevity, and facilitation of economic growth. Nevertheless, it is noteworthy that this popular materi... Read More about A BIM-based framework for designing sustainable structures through the reuse of precast concrete components.

Bond behaviour of light and heavy carbon fibre TRM to masonry interfaces (2023)
Journal Article
Makashev, K., Triantafyllou, S. P., Thermou, G. E., & Tizani, W. (2023). Bond behaviour of light and heavy carbon fibre TRM to masonry interfaces. Construction and Building Materials, 400, Article 132508. https://doi.org/10.1016/j.conbuildmat.2023.132508

We present the results of an experimental campaign on the bond behaviour between carbon fibre textile reinforced mortars and masonry substrate. The campaign involved 54 single lap direct shear tests on masonry wallettes reinforced with a single TRM l... Read More about Bond behaviour of light and heavy carbon fibre TRM to masonry interfaces.

Impact resistance of concrete and fibre-reinforced concrete: a review (2023)
Journal Article
Esaker, M., Thermou, G., & Neves, L. (2023). Impact resistance of concrete and fibre-reinforced concrete: a review. International Journal of Impact Engineering, 180, Article 104722. https://doi.org/10.1016/j.ijimpeng.2023.104722

This paper summarises the research carried out to date on the impact resistance of concrete subjected to different impact load regimes, with a focus on high-velocity projectile impact load. An experimental database is compiled on the response of conc... Read More about Impact resistance of concrete and fibre-reinforced concrete: a review.

Delaying the Occurrence of Bar Buckling in RC Columns Confined with SRG Jacketing (2023)
Journal Article
Thermou, G. E., & Tastani, S. (2023). Delaying the Occurrence of Bar Buckling in RC Columns Confined with SRG Jacketing. Applied Sciences, 13(12), Article 7232. https://doi.org/10.3390/app13127232

This paper investigates experimentally the structural performance of substandard reinforced concrete (RC) short columns confined with steel-reinforced grout (SRG) jackets under monotonically increasing uniaxial compression. The study comprised 24 squ... Read More about Delaying the Occurrence of Bar Buckling in RC Columns Confined with SRG Jacketing.

An Example-Guide for Rapid Seismic Assessment and FRP Strengthening of Substandard RC Buildings (2022)
Journal Article
Tastani, S., & Thermou, G. (2022). An Example-Guide for Rapid Seismic Assessment and FRP Strengthening of Substandard RC Buildings. Applied Sciences, 12(24), Article 12950. https://doi.org/10.3390/app122412950

This paper presents a rapid seismic assessment and Fibre Reinforced Polymer (FRP) retrofit design methodology which relies on the European design guidelines recently published in Chapter 8 of fib Bulletin 90 on the use of externally applied FRP reinf... Read More about An Example-Guide for Rapid Seismic Assessment and FRP Strengthening of Substandard RC Buildings.

Experimental and numerical investigation of the uniaxial compression behavior of SRG-Jacketed R/C columns (2022)
Journal Article
Katsamakas, A. A., Papanikolaou, V. K., Thermou, G. E., & Katakalos, K. (2022). Experimental and numerical investigation of the uniaxial compression behavior of SRG-Jacketed R/C columns. Structures, 44, 603-617. https://doi.org/10.1016/j.istruc.2022.07.089

This paper presents an experimental and numerical investigation of Reinforced Concrete (R/C) short columns strengthened with Steel Reinforced Grout (SRG) jackets. Nine specimens were constructed and tested under concentric monotonic uniaxial compress... Read More about Experimental and numerical investigation of the uniaxial compression behavior of SRG-Jacketed R/C columns.

Micromechanical homogenisation of steel bars in reinforced concrete for damage analysis (2022)
Journal Article
Drougkas, A., Sarhosis, V., & Thermou, G. (2022). Micromechanical homogenisation of steel bars in reinforced concrete for damage analysis. Materials Today Communications, 31, Article 103235. https://doi.org/10.1016/j.mtcomm.2022.103235

A homogenisation scheme based on inclusion modelling is coupled with constitutive laws for damage and implemented in a finite element model for the simulation of concrete and reinforcement bar damage in reinforced concrete structures. The scheme is e... Read More about Micromechanical homogenisation of steel bars in reinforced concrete for damage analysis.

Background to the Monolithicity Factors for the Assessment of Jacketed Reinforced Concrete Columns (2022)
Journal Article
Thermou, G. E., & Kappos, A. J. (2022). Background to the Monolithicity Factors for the Assessment of Jacketed Reinforced Concrete Columns. Buildings, 12(1), Article 55. https://doi.org/10.3390/buildings12010055

The paper presents the background to the expressions adopted in the new Eurocode 8—3 for jacketed reinforced concrete columns. These are based on the commonly adopted concept of monolithicity factors (ratios of resistance of the jacketed section to t... Read More about Background to the Monolithicity Factors for the Assessment of Jacketed Reinforced Concrete Columns.

Bond behaviour of multi-ply steel reinforced grout composites (2021)
Journal Article
Thermou, G. E., De Santis, S., de Felice, G., Alotaibi, S., Roscini, F., Hajirasouliha, I., & Guadagnini, M. (2021). Bond behaviour of multi-ply steel reinforced grout composites. Construction and Building Materials, 305, Article 124750. https://doi.org/10.1016/j.conbuildmat.2021.124750

This paper presents an experimental investigation on Steel Reinforced Grout (SRG) systems comprising multiple layers of galvanized UHTSS textiles, with either 4 or 8 cords/in density, embedded within a geopolymer mortar. Lap-splice tests and single-l... Read More about Bond behaviour of multi-ply steel reinforced grout composites.

Deep Neural Networks for visual bridge inspections and defect visualisation in Civil Engineering (2021)
Conference Proceeding
Bush, J., Corradi, T., Ninić, J., Thermou, G., & Bennetts, J. (2021). Deep Neural Networks for visual bridge inspections and defect visualisation in Civil Engineering. In J. Abualdenien, A. Borrmann, L. Ungureanu, & T. Hartmann (Eds.), EG-ICE 2021 Workshop on Intelligent Computing in Engineering (421-431)

Ageing infrastructure is a global concern, and current structural health monitoring practices are coming under review. With a view to streamline the visual bridge inspection process, we assess the classification performance of two Deep Neural Network... Read More about Deep Neural Networks for visual bridge inspections and defect visualisation in Civil Engineering.

Structural performance of RC columns retrofitted with steel-reinforced grout jackets under combined axial and lateral loading (2021)
Journal Article
Thermou, G. E., Papanikolaou, V. K., & Hajirasouliha, I. (2021). Structural performance of RC columns retrofitted with steel-reinforced grout jackets under combined axial and lateral loading. Engineering Structures, 245, Article 112946. https://doi.org/10.1016/j.engstruct.2021.112946

The effectiveness of steel-reinforced grout (SRG) jacketing in improving the structural performance of deficient reinforced concrete (RC) columns is experimentally investigated in this study. Four full-scale cantilever columns were designed following... Read More about Structural performance of RC columns retrofitted with steel-reinforced grout jackets under combined axial and lateral loading.

A FEM-based model to study the behavior of SRG-strengthened R/C beams (2021)
Journal Article
Katsamakas, A. A., Papanikolaou, V. K., & Thermou, G. E. (2021). A FEM-based model to study the behavior of SRG-strengthened R/C beams. Composite Structures, 266, 113796. https://doi.org/10.1016/j.compstruct.2021.113796

In this paper, a new time‐effective modeling approach is proposed for predicting the response of shear‐deficient reinforced concrete (R/C) beams strengthened with steel‐reinforced grout (SRG) jackets. Solid finite elements are utilized for concrete... Read More about A FEM-based model to study the behavior of SRG-strengthened R/C beams.

Steel-Reinforced Grout (SRG) Strengthening of Shear-Critical RC Beams (2019)
Journal Article
Thermou, G., Papanikolaou, V., Lioupis, C., & Hajirasouliha, I. (2019). Steel-Reinforced Grout (SRG) Strengthening of Shear-Critical RC Beams. Construction and Building Materials, 216, 68-83. https://doi.org/10.1016/j.conbuildmat.2019.04.259

This paper investigates the effectiveness of Steel-Reinforced Grout (SRG) jackets to strengthen shear critical reinforced concrete (RC) beams. Eleven RC beams were tested in three-point bending. Key parameters of investigation were the strengthening... Read More about Steel-Reinforced Grout (SRG) Strengthening of Shear-Critical RC Beams.

Design-oriented models for concrete columns confined by steel-reinforced grout jackets (2018)
Journal Article
Thermou, G. E., & Hajirasouliha, I. (2018). Design-oriented models for concrete columns confined by steel-reinforced grout jackets. Construction and Building Materials, 178, 313-326. https://doi.org/10.1016/j.conbuildmat.2018.05.088

© 2018 Elsevier Ltd This paper investigates the axial stress–strain response of concrete confined with Steel-Reinforced Grout (SRG) jackets comprising of Ultra High Tensile Strength Steel (UHTSS) textiles embedded in an inorganic binder. Brittle, sem... Read More about Design-oriented models for concrete columns confined by steel-reinforced grout jackets.

Seismic rehabilitation of substandard R.C. buildings with masonry infills (2018)
Journal Article
Pardalopoulos, S. I., Pantazopoulou, S. J., & Thermou, G. E. (2018). Seismic rehabilitation of substandard R.C. buildings with masonry infills. Journal of Earthquake Engineering, 24(2), 298-327. https://doi.org/10.1080/13632469.2018.1453397

Seismic deformation demands are localized in areas of stiffness discontinuity, such as in the soft storys of frame structures, where disproportionate damage is often reported in post-earthquake reconnaissance. In many parts of the world, this damage... Read More about Seismic rehabilitation of substandard R.C. buildings with masonry infills.

Compressive behaviour of concrete columns confined with steel-reinforced grout jackets (2017)
Journal Article
Thermou, G. E., & Hajirasouliha, I. (2018). Compressive behaviour of concrete columns confined with steel-reinforced grout jackets. Composites Part B: Engineering, 138, 222-231. https://doi.org/10.1016/j.compositesb.2017.11.041

This paper investigates the compressive strength of concrete columns confined with a new jacketing system using high strength steel reinforced fabrics embedded in an inorganic matrix (SRG). A comprehensive experimental programme was conducted on 52 c... Read More about Compressive behaviour of concrete columns confined with steel-reinforced grout jackets.

Experimental investigation of substandard RC columns confined with SRG jackets under compression (2017)
Journal Article
Thermou, G. E., Katakalos, K., & Manos, G. (2018). Experimental investigation of substandard RC columns confined with SRG jackets under compression. Composite Structures, 184, 56-65. https://doi.org/10.1016/j.compstruct.2017.09.082

This paper aims to explore the behaviour of substandard reinforced concrete (RC) columns confined with Steel-Reinforced Grout (SRG) jackets under monotonically increasing uniaxial compression. A total of 24 specimens of short RC columns of square cro... Read More about Experimental investigation of substandard RC columns confined with SRG jackets under compression.

Retrofit Design Methodology for Substandard R.C. Buildings with Torsional Sensitivity (2017)
Journal Article
Thermou, G. E., & Psaltakis, M. (2018). Retrofit Design Methodology for Substandard R.C. Buildings with Torsional Sensitivity. Journal of Earthquake Engineering, 22(7), 1233-1258. doi:10.1080/13632469.2016.1277569

Recent earthquakes have revealed the susceptibility of non-ductile reinforced concrete (R.C.) buildings with deficiencies related to stiffness and/or mass irregularities in plan and elevation. This paper proposes a design methodology for the seismic... Read More about Retrofit Design Methodology for Substandard R.C. Buildings with Torsional Sensitivity.

Background to the European seismic design provisions for retrofitting RC elements using FRP materials (2015)
Journal Article
Pantazopoulou, S. J., Tastani, S. P., Thermou, G. E., Triantafillou, T., Monti, G., Bournas, D., & Guadagnini, M. (2016). Background to the European seismic design provisions for retrofitting RC elements using FRP materials. Structural Concrete, 17(2), 194-219. doi:10.1002/suco.201500102

This paper is a comprehensive background document on the state of the art in European seismic design provisions which was assembled by fib committee 5.1 to support the development of design guidelines regarding the use of externally applied fibre rei... Read More about Background to the European seismic design provisions for retrofitting RC elements using FRP materials.

Influence of the cross section shape on the behaviour of SRG-confined prismatic concrete specimens (2015)
Journal Article
Thermou, G. E., Katakalos, K., & Manos, G. (2016). Influence of the cross section shape on the behaviour of SRG-confined prismatic concrete specimens. Materials and Structures, 49(3), 869-887. doi:10.1617/s11527-015-0545-2

The effectiveness of the steel-reinforced grout (SRG) jacketing technique in increasing both strength and deformation capacity has been substantiated by experimental evidence [1-3]. What it has not been addressed yet is the influence of the cross sec... Read More about Influence of the cross section shape on the behaviour of SRG-confined prismatic concrete specimens.

Flexural behaviour of reinforced concrete jacketed columns under reversed cyclic loading (2014)
Journal Article
Thermou, G. E., Papanikolaou, V. K., & Kappos, A. J. (2014). Flexural behaviour of reinforced concrete jacketed columns under reversed cyclic loading. Engineering Structures, 76, 270-282. doi:10.1016/j.engstruct.2014.07.013

The objective of the present study is the development of an analytical model for predicting the response under reversed cyclic loading of structural members with ‘old-type’ detailing, strengthened with reinforced concrete (RC) jacketing. The analytic... Read More about Flexural behaviour of reinforced concrete jacketed columns under reversed cyclic loading.

Behaviour of rehabilitated RC beams with self-compacting concrete jacketing – Analytical model and test results (2014)
Journal Article
Chalioris, C. E., Thermou, G. E., & Pantazopoulou, S. J. (2014). Behaviour of rehabilitated RC beams with self-compacting concrete jacketing – Analytical model and test results. Construction and Building Materials, 55, 257-273. https://doi.org/10.1016/j.conbuildmat.2014.01.031

The use of thin reinforced self-compacting concrete jackets as a method to repair and strengthen under-designed flexural concrete members is investigated by means of experimental and analytical studies. The experimental component comprises 20 beam te... Read More about Behaviour of rehabilitated RC beams with self-compacting concrete jacketing – Analytical model and test results.

Concrete confinement with steel-reinforced grout jackets (2014)
Journal Article
Thermou, G. E., Katakalos, K., & Manos, G. (2015). Concrete confinement with steel-reinforced grout jackets. Materials and Structures, 48(5), 1355-1376. https://doi.org/10.1617/s11527-013-0239-6

The potential of steel fiber reinforced jackets combined with inorganic matrix (cementitious grout matrix) as an alternative strengthening system to fiber-reinforced polymer (FRP) jackets was investigated experimentally in the current study. For this... Read More about Concrete confinement with steel-reinforced grout jackets.

Retrofit Yield Spectra–a practical device in seismic rehabilitation (2012)
Journal Article
Thermou, G., Elnashai, A., & Pantazopoulou, S. (2012). Retrofit Yield Spectra–a practical device in seismic rehabilitation. Earthquakes and Structures, 3(2), 141-168. https://doi.org/10.12989/eas.2012.3.2.141

The Retrofit Yield Spectrum (RYS) is a new spectrum-based device that relates seismic demand of a retrofitted structure with the fundamental design parameters of the retrofit. This is obtained from superposition of Yield Point Spectra with design cha... Read More about Retrofit Yield Spectra–a practical device in seismic rehabilitation.

Global Interventions for Seismic Upgrading of Substandard RC Buildings (2011)
Journal Article
Thermou, G. E., Pantazopoulou, S. J., & Elnashai, A. S. (2012). Global Interventions for Seismic Upgrading of Substandard RC Buildings. Journal of Structural Engineering, 138(3), 387-401. https://doi.org/10.1061/%28asce%29st.1943-541x.0000474

A methodology is developed in this paper for the design and proportioning of interventions for seismic upgrading of substandard reinforced-concrete (RC) buildings. The retrofit approach is presented in the form of a simple design tool that aims towa... Read More about Global Interventions for Seismic Upgrading of Substandard RC Buildings.

Assessment indices for the seismic vulnerability of existing R.C. buildings (2010)
Journal Article
Thermou, G. E., & Pantazopoulou, S. J. (2011). Assessment indices for the seismic vulnerability of existing R.C. buildings. Earthquake Engineering and Structural Dynamics, 40(3), 293-313. doi:10.1002/eqe.1028

The seismic vulnerability of old multi?storey reinforced concrete (R.C.) buildings reinforced with substandard details is assessed as a function of interstorey drift demand imposed by the design earthquake while considering brittle termination of ela... Read More about Assessment indices for the seismic vulnerability of existing R.C. buildings.

Design and assessment spectra for retrofitting of RC buildings (2010)
Journal Article
Thermou, G. E., Elnashai, A. S., & Pantazopoulou, S. J. (2010). Design and assessment spectra for retrofitting of RC buildings. Journal of Earthquake Engineering, 14(5), 743-770. doi:10.1080/13632460903410764

This article presents a novel approach for deriving Retrofit Design Spectra (RDS) that are intended for use in preliminary development and assessment of seismic upgrading scenarios of existing structures. The new spectral representation relates the c... Read More about Design and assessment spectra for retrofitting of RC buildings.

Fiber-Reinforced Polymer Retrofitting of Predamaged Substandard RC Prismatic Members (2009)
Journal Article
Thermou, G. E., & Pantazopoulou, S. J. (2009). Fiber-Reinforced Polymer Retrofitting of Predamaged Substandard RC Prismatic Members. Journal of Composites for Construction, 13(6), 535-546. doi:10.1061/(asce)cc.1943-5614.0000057

An experimental study was conducted to investigate the efficiency of FRP jackets in upgrading the seismic behavior of lightly reinforced concrete prismatic members previously damaged under a combination of axial compression and a reversed cyclic late... Read More about Fiber-Reinforced Polymer Retrofitting of Predamaged Substandard RC Prismatic Members.

Flexural Behavior of Brittle RC Members Rehabilitated with Concrete Jacketing (2007)
Journal Article
Thermou, G., Pantazopoulou, S., & Elnashai, A. (2007). Flexural Behavior of Brittle RC Members Rehabilitated with Concrete Jacketing. Journal of Structural Engineering, 133(10), 1373-1384. doi:10.1061/(asce)0733-9445(2007)133:10(1373)

The composite flexural action of prismatic reinforced concrete (RC) members repaired/strengthened by RC jacketing was modeled with a dual-section approach. The model considers the relative slip at the interface between the existing member and the jac... Read More about Flexural Behavior of Brittle RC Members Rehabilitated with Concrete Jacketing.

Design Methodology for Seismic Upgrading of Substandard Reinforced Concrete Structures (2007)
Journal Article
Thermou, G. E., Pantazopoulou, S. J., & Elnashai, A. S. (2007). Design Methodology for Seismic Upgrading of Substandard Reinforced Concrete Structures. Journal of Earthquake Engineering, 11(4), 582-606. doi:10.1080/13632460601031573

This article presents a design methodology for seismic upgrading of existing reinforced concrete (RC) buildings. The methodology is based on the modification of the deflected shape of the structure so as to achieve a near-uniform distribution of inte... Read More about Design Methodology for Seismic Upgrading of Substandard Reinforced Concrete Structures.

Metallic fabric jackets: an innovative method for seismic retrofitting of substandard RC prismatic members (2006)
Journal Article
Thermou, G., & Pantazopoulou, S. (2007). Metallic fabric jackets: an innovative method for seismic retrofitting of substandard RC prismatic members. Structural Concrete, 8(1), 35-46. doi:10.1680/stco.2007.8.1.35

This paper presents the results of a recent experimental research study where metallic (high-strength steel cord) fabric jackets (MF jackets) were utilised for the seismic upgrading of substandard reinforced concrete members. The proposed interventio... Read More about Metallic fabric jackets: an innovative method for seismic retrofitting of substandard RC prismatic members.

Seismic retrofit schemes for RC structures and local-global consequences (2006)
Journal Article
Thermou, G., & Elnashai, A. (2006). Seismic retrofit schemes for RC structures and local-global consequences. Progress in Structural Engineering and Materials, 8(1), 1-15. doi:10.1002/pse.208

A review of repair schemes for reinforced concrete frame buildings is presented in this paper, within the context of global objectives of the intervention process. Local as well as global intervention measures are discussed and their technological ap... Read More about Seismic retrofit schemes for RC structures and local-global consequences.

Seismic design and performance of composite frames (2003)
Journal Article
Thermou, G., Elnashai, A., Plumier, A., & Doneux, C. (2004). Seismic design and performance of composite frames. Journal of Constructional Steel Research, 60(1), 31-57. doi:10.1016/j.jcsr.2003.08.006

In this study, the seismic design and performance of composite steel-concrete frames are discussed. The new Eurocode 4 [EC4, Eurocode No 4. Design of composite steel and concrete structures. European Committee for standardization, 3rd Draft, prEN 199... Read More about Seismic design and performance of composite frames.