Performance of high-modulus near-surface-mounted FRP laminates for strengthening of concrete columns

Khorramian, Koosha; Sadeghian, Pedram

doi:10.1016/j.compositesb.2018.11.064

Cited by 27 publications

(6 citation statements)

References 10 publications

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“…Nowadays, FRP composites are often used to reinforce existing concrete members, such as beams and columns for building structures, and many researchers investigated the performance of reinforced concrete beams and columns with FRP [3,4,5,6,7,8]. Shaw et al [5] conducted three-point bending tests on three small scale prestressed concrete (PC) beams that have been damaged then reinforced with carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) externally bonded laminates.…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Composite Concrete Columns with Encased FRP Confined Concrete Cores

Wang

Yao

Yangshan

et al. 2019

Sensors

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A composite concrete column with encased fiber reinforced polymer (FRP) confined concrete cores (EFCCC) is proposed in this paper. The cross-sectional form of the EFCCC column is composed of several orderly arranged FRP confined concrete cores (FCCCs) surrounding a filled core concrete. This novel composite column has several advantages, such as higher compressive capacity, stronger FRP confinement, and ductile response. The compressive experiment is employed to investigate the compressive behavior of the EFCCC column with deferent parameters, such as outside concrete and stirrups. Test results show that the main failure mode of the EFCCC column with and without an outside concrete or stirrups is tensile fracture of the glass fiber reinforced polymer (GFRP) tubes. Compared to a reinforced concrete (RC) column, the strength and ductility of the EFCCC column was obviously improved by 20% and 500%, respectively. A finite element model (FEM) based on the Drucker–Prager (D-P) was developed that can accurately predict the axial compression behavior of the composite column with FRP confined concrete core. The predicted results obtained by using this FEM have excellent agreement with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Composite Concrete Columns with Encased FRP Confined Concrete Cores

Wang

Yao

Yangshan

et al. 2019

Sensors

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“…In structural engineering, the main product forms of FRP include laminates (sheets and plates), bars, cables, and grids [18][19][20][21][22][23][24]. e most common methods for strengthening using FRPs are externally bonded (EB) and near-surface mounted (NSM) reinforcements [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Review of Experimental Studies on Application of FRP for Strengthening of Bridge Structures

Yuan

2020

Advances in Materials Science and Engineering

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In recent years, fiber-reinforced polymer (FRP) composites have been widely used as a new type of high-performance material in concrete structures. FRP composites have the advantages of high strength, light weight, and corrosion resistance. Based on existing studies in the literature, this paper reviews the development and applications of FRP materials for the strengthening and rehabilitation of bridge structures. The types and properties of FRP composites are summarized, and the applications and development of FRP sheets, FRP bars, FRP grids, and prestressed FRP tendons for bridge structures are discussed. Different types of FRP composites result in different failure characteristics and bearing capacities. Moreover, this paper covers the FRP strengthening methods and the response properties of the flexural performance, bonding performance, and ductility. Significant conclusions regarding the strengthening/repair of bridge structures with FRP composites are presented. The review details the current state of knowledge and research on strengthening bridge structures with FRP composites and is helpful for better understanding and establishing design criteria.

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“…In case of concrete studies, CFRP is often considered as an effective and alternative technique to reinforce many types of concrete or masonry structures incorporating old structures and monuments [21][22][23]. In general, the current literature contains a lot of research that relates to concrete reinforcement with CFRP in various types of samples, such as classic columns [24], elements with CFRP material in cavities of concrete surfaces [25] and concrete columns under eccentric load [26]. The development of CFRP techniques can also be observed in case of beam structures.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Surface Preparation for Self-Compacting, High-Performance, Fiber-Reinforced Concrete Confined with CFRP Using a Cement Matrix

2020

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With the development of concrete technology, the tendency to combine different materials with each other to achieve a greater efficiency and durability of structures can be observed. In the modern construction industry, various materials and techniques are increasingly being combined in order to achieve e.g., an increased resistance to dynamic impacts of a structure, or an increased scope of work of a selected constructional element, which translates into a significant increase in the energy of destruction. Thus, hybrid elements, known as composite ones, are created, which consist of concrete and reinforcements. This study examined the influence of the preparation of the concrete surface on the behavior of high-performance, self-compacting, fiber-reinforced concrete (HPSCFRC), reinforced with carbon fibers (CF) using a cement matrix. In the general lamination processes, this is preformed using epoxy resin. However, epoxy resin is sensitive to relatively low temperatures, and therefore the authors attempted to use a cement matrix in the lamination process. When connecting hardened concrete with a fresh concrete matrix or mixture, the type of the concrete surface is significant. In this research, three types of concrete surfaces e.g., unprepared, sanded and grinded were considered. All of the surfaces were examined using a 3D laser scanner, to determine the Abbott-Firestone profile material share curve. In this research, cylindrical concrete specimens were reinforced with one, two and three layers of laminates. They were then subjected to a uniaxial compressive test. The results of tests showed that the use of cement matrix in the lamination process, due to its low efficiency, should not be applied when reinforcing concrete elements with a high compressive strength. Moreover, the grinded surface of concrete showed the best cooperation with CF reinforcement.

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Performance of high-modulus near-surface-mounted FRP laminates for strengthening of concrete columns

Cited by 27 publications

References 10 publications

Compressive Behavior of Composite Concrete Columns with Encased FRP Confined Concrete Cores

Compressive Behavior of Composite Concrete Columns with Encased FRP Confined Concrete Cores

Review of Experimental Studies on Application of FRP for Strengthening of Bridge Structures

The Impact of Surface Preparation for Self-Compacting, High-Performance, Fiber-Reinforced Concrete Confined with CFRP Using a Cement Matrix

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