14 documents found, page 1 of 2
Short- and long-term deflections of RC slabs strengthened with CFRP systems und...
Dushimimana, Aloys; Pereira, João Miguel; Correia, Luís Luciano Gouveia; Sena-Cruz, JoséThis study investigates the combined effects of sustained loading and environmental conditioning on the short-and long-term mid-span deflection behavior of reinforced concrete (RC) slabs strengthened using different CFRP-based techniques: (i) Externally Bonded Reinforcement (EBR), (ii) Near-Surface Mounted (NSM), (iii) EBR with prestressing via mechanical anchorage (EBR-MA), and (iv) EBR with prestressing via g...
Multi-scale and multi-physics investigation on durability and long-term behavio...
Dushimimana, AloysAll over the world, if one looks at built structures, most of them were made using concrete. In most cases, concrete is used with an embedded reinforcing material (e.g., steel) to improve its tensile strength, thus yielding to reinforced concrete (RC). The adoption of concrete dates to many centuries ago, but its current use has been a hindrance, as it emits the unwanted high levels of carbon dioxide (CO2) into...
Durability of bond between EBR-CFRP laminate and concrete after four years of n...
Dushimimana, Aloys; Sena-Cruz, José; Correia, Luís Luciano Gouveia; Pereira, João Miguel; Cabral-Fonseca, Susana; Cruz, RicardoApplication of carbon fibre reinforced polymer (CFRP) composites in strengthening of existing reinforced concrete (RC) structures has been widely accepted. However, the durability of adhesively bonded CFRP-concrete joint has not yet been fully investigated, which therefore paves the way to the topic addressed in this work: the durability of the joint in concrete elements strengthened with CFRP laminate using ex...
Modelling of short- and long-term bond behavior in concrete structures strength...
Dushimimana, Aloys; Sena-Cruz, José; Vassilopoulos, Anastasios P.; Correia, Luís Luciano Gouveia; Pereira, João MiguelIn the context of structural rehabilitation of concrete structures, carbon fiber reinforced polymer (CFRP) composites are usually bonded to concrete substrates using the externally bonded reinforcement (EBR) technique. Although this is a commonly used method in various applications, only a few studies have investigated the long-term performance of such joints. In this study, numerical models to simulate the sho...
Behavior of CFRP composites and epoxy adhesives after long-term exposure to out...
Dushimimana, Aloys; Vassilopoulos, Anastasios P.; Sena-Cruz, José; Pereira, João Miguel; Correia, Luís Luciano Gouveia; Cabral-Fonseca, SusanaCarbon fiber reinforced polymer (CFRP) composites have shown desirable properties in aerospace, automotive, and construction industries. Focusing on the latter and in the context of strengthening existing structures, CFRP composites are typically bonded to concrete structures using epoxy adhesive as a bonding agent. To date, there is a lack of literature on the durability of both the CFRP composite and epoxy ad...
Effects of long-term exposure of NSM CFRP-to-concrete bond to natural and accel...
Dushimimana, Aloys; Sena-Cruz, José; Correia, Luís Luciano Gouveia; Pereira, João Miguel; Cabral-Fonseca, Susana; Cruz, RicardoCarbon fiber reinforced polymer (CFRP) composites can be used to strengthen existing reinforced concrete (RC) structures. The CFRP laminate can be bonded to RC structure using epoxy adhesive via near-surface mounted (NSM) strengthening technique. However, existing literature generally lacks data about durability of NSM CFRP-to-concrete bond. In this study, strengthened concrete elements were exposed to laborato...
Natural outdoor and laboratory-controlled ageing of epoxy adhesives and CFRP la...
Dushimimana, Aloys; Correia, Luís Luciano Gouveia; Cruz, Ricardo; Cabral-Fonseca, Susana; Pereira, João Miguel; Sena-Cruz, JoséAgeing of epoxy adhesive and carbon fibre reinforced polymer (CFRP) laminate was addressed in this work. The specimens were exposed to laboratory-controlled (20 °C/55% RH, and water immersion at 20 °C) and outdoor (ageing mainly promoted by carbonation, freeze-thaws, airborne chlorides, and elevated temperatures) conditioning for up to four years. The results from tensile tests showed water immersion of the epo...
Analytical prediction of flexural behaviour of RC slabs strengthened with non-p...
Dushimimana, Aloys; Correia, Luís Luciano Gouveia; Cruz, Ricardo; Cabral-Fonseca, Susana; Pereira, João Miguel; Sena-Cruz, JoséThe flexural behaviour of reinforced concrete (RC) slabs strengthened with carbon fibre reinforced polymer (CFRP) laminates is analytically addressed in this work. Analytical approaches are developed for (i) near-surface mounted (NSM), (ii) externally bonded reinforcement (EBR), and the EBR prestressed using (iii) mechanical anchorage (MA) and (iv) gradient anchorage (GA) systems. The analytical results show a ...
Durability of CFRP-concrete bond and corresponding involved materials under dif...
Dushimimana, Aloys; Correia, Luís Luciano Gouveia; Cruz, José Ricardo Loureiro; Cabral-Fonseca, Susana; Pereira, João Miguel; Sena-Cruz, JoséAgeing of interfaces between Carbon Fibre Reinforced Polymer (CFRP) laminates and concrete, applied according to externally bonded reinforcement (EBR) and near-surface mounted (NSM) techniques, and their constitutive materials was investigated. That is, experimental tests on the ageing of concrete, epoxy adhesive, CFRP laminate, and the CFRP-concrete interface were performed for specimens after being exposed to...
Analytical approaches for flexural analysis of RC slabs strengthened with prest...
Dushimimana, Aloys; Correia, Luís Luciano Gouveia; Cruz, José Ricardo Loureiro; Pereira, João Miguel; Sena-Cruz, JoséAnalytical approaches are developed for predicting the flexural behaviour of reinforced concrete slabs strengthened with carbon fibre reinforced polymer (CFRP) laminates applied according to (i) near-surface mounted (NSM) and (ii) externally bonded reinforcement (EBR) as non-prestressed strengthening techniques, as well as according to the EBR with (iii) mechanical anchorage (MA) and with (iii) gradient anchora...