Near surface mounted FRP reinforcement for strengthening of concrete structures

Szabó, Zsombor; Balázs, György L.

doi:10.3311/pp.ci.2007-1.05

Cited by 50 publications

(21 citation statements)

References 10 publications

(27 reference statements)

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“…Fiber reinforced polymer (FPR) strips and laminates are used as external bonded (EB) strengthening on the concrete surface of beams to improve their strength [6][7][8][9]. Another strengthening technique foresees near surface mounted (NSM) FRP rods with different shapes in grooves on concrete covers; many advantages of NSM technique seem to consider this an emerging technique [10][11][12][13] capable of improving the performance of RC with EB FRP. The assessment of strengthened RC beams both with EB FRP strips and with NSM FRP rods was experimentally investigated with vibration tests [14][15][16] analysis is commonly used to simulate the behavior of structural elements even if experimental data are fundamental for controlling theoretical models.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of RC beams – in different scale – with near surface mounted CFRP rectangular rods

Capozucca

Bossoletti

2015

Composite Structures

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Section: Introductionmentioning

confidence: 99%

Dynamic response of RC beams – in different scale – with near surface mounted CFRP rectangular rods

Capozucca

Bossoletti

2015

Composite Structures

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“…The use of NSM in the rehabilitation and strengthening of existing damaged concrete structures has been becoming popular in the last decade [1][2][3][4][5]. Besides being simple and economical, this method also has a quick installation time.…”

Section: Introductionmentioning

confidence: 99%

“…Besides being simple and economical, this method also has a quick installation time. CFRP and GFRP bars are the most commonly used reinforcing materials for NSM [1][2][3][4]. However, the prices of FRP materials are still high compared to ordinary steel reinforcements and plates.…”

Section: Introductionmentioning

confidence: 99%

Shear strengthening of reinforced concrete beams with near surface mounted steel bars

Thamrin

Haris

2019

MATEC Web Conf.

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This paper reports on an experimental study examining reinforced concrete beams without stirrups strengthened with Near Surface Mounted (NSM) steel bars. The beams were simply supported and were subjected to four point bending load. Three beams tested were designed as control specimens and the other six beams were strengthened with NSM steel bars. Three ratios of longitudinal reinforcement (1%, 1.4%, and 2.4%) and two types of installation angle (45 and 90 degree) were used as test variables. The test results in terms of graphs of deflection due to shear forces are presented to demonstrate the ability of different longitudinal reinforcement ratios and installation angle to withstand shear forces. The influence of the test variables on the crack patterns was also observed. It was found that NSM steel bars increase the shear strength of reinforced concrete beams without stirrups significantly. However, in the case of higher longitudinal reinforcement ratios the beams failed in brittle mode as indicated by a sudden drop in the shear force-deflection graphs.

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“…Surveys such as those reported in [8,16,17] showed that Carbon FRP (CFRP) has been used in most existing studies for NSM strengthening of concrete structures.…”

Section: Introductionmentioning

confidence: 99%

Bond behavior of NSM CFRP laminates in concrete under sustained loading

Emara

Barris

Baena

et al. 2018

Construction and Building Materials

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The success of Fiber Reinforced Polymers (FRP) strengthening methodologies for reinforcing concrete structures is highly related to the interfacial bond properties between reinforcement and concrete, which depends upon a number of parameters. Several studies were carried out investigating the short-term bond behavior of Near Surface Mounted (NSM) FRP strengthening systems. However, there has been only limited investigation of its long-term behavior resulting in a significant lack of available experimental data about this relevant aspect. The bond performance of the materials involved in the NSM FRP strengthening system (FRP, adhesive and concrete), due to its nature, is susceptible to be affected by both the sustained loading and environmental conditions. In this study, bond of NSM Carbon FRP (CFRP) laminates in concrete was investigated experimentally using pull-out tests. The experimental program consisted of both short-term tests, in which the load was applied monotonically up to failure, and long-term tests in which different levels of sustained loading were applied. The specimens were tested under sustained loading using bonded length,

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Near surface mounted FRP reinforcement for strengthening of concrete structures

Cited by 50 publications

References 10 publications

Dynamic response of RC beams – in different scale – with near surface mounted CFRP rectangular rods

Dynamic response of RC beams – in different scale – with near surface mounted CFRP rectangular rods

Shear strengthening of reinforced concrete beams with near surface mounted steel bars

Bond behavior of NSM CFRP laminates in concrete under sustained loading

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