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Introduction
Dr Firas AL MAHMOUD holds a diploma (1999) in civil engineering, Phd in strengthening of reinforced concrete structures from National Institute of Applied Sciences (INSA), Toulouse France. Accreditation to supervise research (HDR) (2016). Dr Firas AL MAHMOUD currently works at Lorraine University - France as a structural engineering educator. He was the Head of Civil Engineering Department at Lorraine University from 2017 – 2020 academic year.
Current institution
Additional affiliations
September 2008 - September 2017
January 2008 - March 2016
Publications
Publications (77)
Welcome to the 2nd Conference on Health and Retrofitting of Structures (HAROS2024), where excellence and innovation converge! This conference will be held in September 2024 in the city of Nancy, France. Civil engineers, scholars, professors, and students from around the globe are invited to join us for two days of collaboration, discussion, and kno...
On behalf of The Third International Conference on Construction Engineering (ICCE 2024) Organizing Committee, it is our great pleasure to invite you to participate to ICCE 2024 taking place during December 3-5, 2024, in Damascus, Syria in hybrid format (onsite and virtual).
ICCE 2024 is organized by the Higher Institute of Earthquake Studies and R...
Monitoring the health of civil engineering structures using implanted deformation, temperature and corrosion sensors would further improve maintenance and extend the service life of those structures. However, sensor integration poses a number of problems, due to the presence of cables and on-board electronics. Passive, wireless SAW sensors offer a...
Monitoring the health of civil engineering structures using implanted deformation, temperature and corrosion
sensors would further improve maintenance and extend the service life of those structures. However, sensor integration
poses a number of problems, due to the presence of cables and on-board electronics. Passive, wireless SAW sensors
offer a...
The hydrodynamic behavior of RC elevated water tanks is quite complex, and understanding the hydrodynamic behavior effect of the soil structure interaction is necessary for predicting the dynamic response of the elevated tank.
In Syria, all RC elevated water tanks were designed to withstand seismic loads that arehigher than the 6th of February eart...
The conference Health and Retrofitting of Structure (HAROS 2023) will be held on September 15, 2023.
https://l2mgc.cyu.fr/version-francaise/navigation/actualites
Outside of CY Cergy-Paris University, participation is fee-based
Please share this information with others.
The application of timber-concrete composite (TTC) connections in structures has
increased over the past decades. The mechanical behaviour of these connections is
largely influenced by the stiffness of the joints, deformations and strength. This paper
presents an analytical calculation of stiffness, short-term laboratory experiments and
numerical s...
Statically indeterminate RC elements such as continuous beams are the most widely
used structural form. Their flexural behavior and failure modes are considerably
different from those of simply supported ones. The use of FRPs for flexural
strengthening and retrofitting continuous RC beams has hardly been studied.
Therefore, this paper compares the...
The fundamental properties of recycled aggregate (RA) and RA concrete have been the subject of extensive research over the
past few decades, leading many countries to issue regulations or proposals regarding their use. In each case, full or partial replacement
of natural aggregates (NA) with recycled alternatives has proven to be a practical option...
Most building codes attempt to prevent the phenomenon of impact between adjacent buildings by increasing the distance
between them, but on the other hand, the high cost of land requires us to take advantage of the largest area possible in addition to the
difficulty of processing the separation architecturally, especially for the high buildings the...
INTERNATIONAL CONFERENCE ON CONSTRUCTION ENGINEERING: TOWARDS MORE SUSTAINABLE STRUCTURES 2022 (ICCE 2022)
Dear colleague,
On behalf of the Organizing Committee, it gives us a great pleasure to invite you to participate and submit an abstract to the INTERNATIONAL CONFERENCE ON CONSTRUCTION ENGINEERING: TOWARDS MORE SUSTAINABLE STRUCTURES 2022 (ICC...
Similar to other structural elements, reinforced concrete (RC) continuous beams may need to be repaired or strengthened in order to extend their service lives or improve their capacity for loading and deformation. Their flexural behavior and failure modes differ significantly from those of ones that are simply supported. There hasn't been much rese...
ICCE 2022 aims to bring together the researchers and the experts in the field of construction engineering from worldwide universities. The conference’s main objective is to present innovative research and cutting-edge technologies for the optimal use of available resources and energy, which ensures the sustainability and the efficiency of construct...
This paper presents an experimental study of the use of carbon fiber-reinforced
polymer (CFRP) composites to strengthen two-span reinforced concrete (RC) beams.
Six large-scale beams were strengthened in hogging and sagging regions according to
the external bonding (EB) technique and then statically tested to investigate the impact
of the CFRP posi...
This paper aims to present and analyze the results of an ongoing research project on
the use of NSM and side-NSM-FRP composites for the purpose of increasing the loadcarrying capacity of continuous two-pan RC beams. This research study comprises two
parts; an experimental part and a finite element (FE) part. First, three large-scale twospan beams w...
Analysis and design of structures sensitive to second order effects require to take into account initial imperfections. Scaffold structures, due to their low rigidity, are very sensitive to second order effects. The accuracy of the design of such structures is based in part on the estimation of initial imperfections affecting the structure. In the...
The European design code for temporary work equipment and especially for scaffolding, NF EN 12811-1, defines the cross-section non-linear plastic resistance criterion, which requires including initial imperfections in the global analysis of the structure. At the same time, the European design code for steel structures, Eurocode 3 Part 1-1, establis...
The analysis and design of structures sensitive to second order effects require the consideration of initial imperfections. Scaffold structures, due to their low stiffness, are very sensitive to second order effects. The accuracy of the design of these structures relies in part on the estimation of initial imperfections affecting the structure. In...
The current study is part of a larger project called RECYBETON developed in France since 2012. This part of project deals with the important properties of hardened concrete of recycled aggregates (RA), from microstructure to properties related to durability and fire behavior. The founding objective of the RECYBETON project is generally not to formu...
This paper deals with strengthening statically indeterminate reinforced concrete (RC) beams with carbon and glass fiber reinforced polymers (FRP) rods by using the Near Surface Mounted (NSM) technique. The test program consisted of six two-spans beams; one control beam, which had exploited for comparisons purpose, and five beams initially strengthe...
The European design code for steel structures, Eurocode 3 Part 1-1, defines the buckling resistance criterion, which
enables initial imperfections to be taken into account without including them in the model structure. The initial
imperfections are taken into account by the reduction factor for buckling χ. This reduction factor depends on the
imper...
The study of the properties of Recycled Aggregates (RA) and the
basic properties of RA concrete has been on going over the last few
decades, leading a number of countries to establish standards or
recommendations supporting their use. In all the cases, the full and
partial replacement of the Natural Aggregates (NA) with recycled
alternatives has be...
This paper presents an experimental program that was carried out for the purpose of studying the global flexural
performance of reinforced concrete beams strengthened internally with Carbon Fiber Reinforced Polymer (CFRP) rods
using the Side Near Surface Mounted (SNSM) technique. The CFRP rods were placed laterally, adjacent to the
longitudinal ste...
The study of the properties of Recycled Aggregates (RA) and the basic properties of RA concrete has been on going over the last few decades, leading a number of countries to establish standards or recommendations supporting their use. In all the cases, the full and partial replacement of the Natural Aggregates (NA) with recycled alternatives has be...
This paper presents an experimental program carried out to study the global flexural performance of reinforced concrete beams strengthened internally with Carbon Fiber Reinforced Polymer rods (CFRP) by using Side Near Surface Mounted (SNSM) technique. The CFRP rods were placed laterally adjacent to the longitudinal steel bars inside precut grooves....
Stresses of a structure are determined with a first or a second order analysis. The choice of the method is guided by the potential influence of the structure’s deformation. In general, considering their low rigidity with regard to those of buildings, scaffolding and shoring structures quickly reach buckling failure. Imperfections, such as structur...
Stresses of a structure are determined with a first or a second order analysis. The choice of the method is guided by the potential influence of the structure’s deformation. In general, considering their low rigidity with regard to those of buildings, scaffolding and shoring structures quickly reach buckling failure. Imperfections, such as structur...
The verification of beam columns according to Eurocode 3 Part 1-1 enables to calculate the design criterion of a structure without including the initial imperfections in the modal structure, thanks to the buckling coefficient χ. This buckling coefficient depends on the imperfection factor α defined in the Table 6.1 of Eurocode 3 Part 1-1. Through s...
The present study deals with the mechanical behavior of reinforced concrete columns made from Recycled Coarse and Fine Aggregates replacing the natural ones. These columns are loaded in eccentric static compression with different replacement ratio in their mix, with the same compression strength class. An experimental program followed by an analyti...
Recent studies have show that, generally, the bond between the concrete and smooth FRP rods is affected by the non-isotropic mechanical properties of the CFRP. The mechanical properties in the longitudinal direction are controlled by the fibers, but in the transversal direction, the stiffness and the strength depend on the resin matrix, the low ela...
The near surface mounted reinforcement technique (NSM) is one of the promising techniques used nowadays to strengthen RC structures. In the NSM technique, the Carbon Fibre Reinforced Polymer (CFRP) rods are placed inside pre-cut grooves and are bonded to the concrete with epoxy adhesive. This paper investigates the effectiveness of repair technique...
The near surface mounted reinforcement (NSM) technique is one of the promising techniques used nowadays to strengthen reinforced concrete RC structures. In the NSM technique, the Carbon Fibre Reinforced Polymer (CFRP) rods are placed inside pre-cut grooves and are bonded to the concrete with epoxy adhesive. This paper investigates corroded RC beams...
Spécialité : Sciences-Mécanique, génie mécanique, génie civil
Abstract:
The exploitation duration of reinforced concrete structures is typically fifty to one hundred years according to its size or function. During such period, it is possible that significant changes occur: use change, degradation by corrosion of reinforcing steel are still some o...
Cette communication présente les caractéristiques principales d’un modèle par Eléments Finis (EF) développé en utilisant le logiciel FEMIX afin de prévoir le comportement des poutres en béton armé corrodées et réparées à l’effort tranchant par l’insertion des joncs de carbone par la technique NSM (Near-Surface Mounted reinforcement). Cette techniqu...
This paper presents the main features of a finite element FE numerical model developed using the computer code FEMIX to predict the contribution of near-surface mounted (NSM)
carbon-fibre-reinforced polymer (CFRP) rods to the shear repair of corroded reinforced
concrete RC beams. In the RC beams repaired in shear with the NSM technique, the CFRP
ro...
This experimental research aims to investigate the possibility of using Carbon Fiber-Reinforced Polymer (CFRP) rods to strengthen in shear concrete structural members with the Near Surface Mounted reinforcement (NSM) technique. Seven reinforced concrete beams were tested in flexure with or without traditional shear reinforcement. Carbon-epoxy pultr...
This paper discusses the results of an experimental program designed to investigate the effect of repairing the RC corroded shear-critical deep beams with Near Surface Mounted (NSM) carbon fibre-reinforced polymer (CFRP) rods. A 28-year-old RC beam corroded by exposure to a chloride environment was cut into two small short-shear-span beams, or deep...
This paper presents the main features of finite element FE numerical model developed using the computer code FEMIX to predict the near-surface mounted NSM carbon-fiber-reinforced polymer CFRP rods shear repair contribution to corroded reinforced concrete RC beams. In the RC beams shear repaired with NSM technique, the Carbon Fibre Reinforced Polyme...
The long-term durability of fibre reinforced polymer (FRP) composites is often stated as being the main reason for the use of these materials. Indeed, structures externally or Near Surface Mounted (NSM) reinforced with Carbon Fibre Reinforcement Polymer CFRP are often in contact with temperature cycles and salt water immersion and other environment...
Corrosion of steel in reinforced concrete leads to several major defects. Firstly, a reduction in the cross-sectional area of the reinforcement and in its ductility results in premature bar failure. Secondly, the expansion of the corrosion products causes concrete cracking and steel–concrete bond deterioration and also affects the bending stiffness...
The proposed model calculates the deflection of carbon fibre-reinforced polymer
(CFRP) strengthened beams. In this model, the beams were strengthened before
loading, so in an uncracked state. The calculation before cracking uses conventional
existing models. The calculation of the deflection after cracking is based on a nonlinear
Macro-Finite-Eleme...
The long-term durability of fibre reinforced polymer (FRP) composites is often stated as being the main reason for the use of these materials. Indeed, structures externally or Near Surface Mounted (NSM) reinforced with Carbon Fibre Reinforcement Polymer CFRP are often in contact with temperature cycles and salt water immersion and other environment...
The mechanical behavior of corroded RC elements is generally degraded by the reduction of reinforcement cross-section and the deterioration of steel-concrete bond. The aim of this paper is to investigate the post-repair performance of corrosion-damaged RC beams. Beams are repaired with Near Surface Mounted (NSM) carbon fiber-reinforced polymer (CFR...
The near surface mounted reinforcement technique (NSM) is one of the promising techniques used nowadays. In the NSM technique, the Carbon Fibre Reinforced Polymer (CFRP) rods are placed inside pre-cut grooves and are bonded to the concrete with epoxy adhesive. Experimental results obtained on concrete short beams taken from one beam exposed to a na...
The aim of the experimental programme developed in this work was to study the failure modes and the pull-out failure mechanism of RC members strengthened by Near Surface Mounted reinforcement (NSM) technique. The global behaviour of reinforced concrete beams strengthened by NSM and subjected to flexure was investigated. The rods were 6- and 12-mm-d...
The deterioration of reinforced concrete RC structures due to continual upgrading of service loads has resulted in a large number of structures that need repair. In this paper, an experimental program presented studies the possibility of using a Near Surface Mounted (NSM) CFRP rod to repair RC beams damaged by overloading. Several beam specimens we...
The deterioration of reinforced concrete RC structures due to continual upgrading of service loads has resulted in a large number of structures that need to repair. In this paper, an experimental program presented studies the possibility of using a Near Surface Mounted (NSM) CFRP rods to repair RC beams damaged by overloading. Several beam specimen...
L’objectif du programme expérimental développé dans ce travail est d'étudier l’utilisation des joncs de carbone pour renforcer des éléments de structure en béton armé à l’effort tranchant, avec la technique NSM (Near Surface Mounted reinforcement). Le comportement des poutres renforcées à l’effort tranchant, est étudié suivant deux configurations d...
Abstract :
The aim of the experimental program developed in this work is to investigate the possibility of using Carbon Fiber Reinforced Polymer (CFRP) rods to strengthen concrete structural members with the Near Surface Mounted reinforcement (NSM) technique.
We study some physical and mechanical proprieties of CFRP rods and their interaction with...
The aim of the experimental program developed in this work was to investigate the effects of concrete strength, filling material, groove dimensions, groove surface preparation for such CFRP rods used in the Near-Surface Mounted reinforcement (NSM) technique. Two interfaces are involved in the NSM technique: one between the reinforcing composite rod...
The aim of the experimental programme developed in this work was to investigate the possibility of using Carbon Fibre-Reinforced Polymer (CFRP) rods to strengthen concrete structural members with the Near Surface Mounted reinforcement (NSM) technique. The global behaviour of reinforced cantilever concrete beams strengthened by the NSM technique and...
The aim of the experimental programme developed in this work was to investigate the possibility of using Carbon Fibre-Reinforced Polymer (CFRP) rods to strengthen concrete structural members with the near-surface mounted reinforcement (NSM) technique. The global behaviour of reinforced concrete beams strengthened by NSM and subjected to flexure was...
This experimental program investigates the possibility of using Carbon-Fiber-Reinforced Polymer (CFRP) rods to repair RC beams
damaged by steel corrosion. The 6-mm-diameter carbon-epoxy pultruded FRP rods were implemented in undamaged areas of the concrete
cover by using the Near Surface Mounted reinforcement (NSM) technique. The corroded beam test...
The experimental program developed in this work aims at investigating the possibility of using carbon fibre reinforced polymer rods to strengthen concrete structural members. Firstly, physical, chemical and mechanical tests were performed on carbon fibre reinforced polymer. Secondly, the bond between carbon fibre reinforced polymer rod and concrete...
The aim of the experimental programme developed in this work is to investigate the possibility of using CFRP rods to strengthen concrete structural members with the Near Surface Mounted Reinforcement (NSMR) technique. The global behaviour of reinforced concrete beams strengthened by NSMR and subjected to flexure is investigated. The rods were 6-mm...
