Experimental Investigation of FRP-Strengthened RC Beam-Column Joints

Antonopoulos, Costas P.; Triantafillou, Thanasis

doi:10.1061/(asce)1090-0268(2003)7:1(39)

Cited by 318 publications

(124 citation statements)

References 6 publications

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“…Because of this, the behavior of FRP strip anchorage has not been widely reported. Studies utilizing this system have been conducted by Lamothe (1998), Antonopoulos and Triantafillou (2003), Nagy-György et al (2005), Ceroni et al (2008), Ortega (2009), Donchev and Nabi (2010), and Petty et al (2011), with inconsistent results. Ortega (2009) used FRP strips to anchor FRP shear reinforcement to RC and prestressed concrete girders.…”

Section: Frp Stripsmentioning

confidence: 99%

Review of Anchorage Systems for Externally Bonded FRP Laminates

Grelle

Sneed

2013

Int J Concr Struct Mater

189

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The most recent report by ACI Committee 440 on externally bonded fiber reinforced polymer (FRP) strengthening systems states that systems designed to mechanically anchor FRP should be studied in detail and substantiated by physical testing. To select and design an appropriate anchorage system for use in an FRP strengthening system, it is important that findings from previous research studies be known. This paper presents a comprehensive literature review of the performance of different mechanical anchorage systems used in FRP strengthening applications. Each anchorage system is discussed in terms of its purpose and performance. Advantages and disadvantages of each system are discussed, and areas in need of future research are explored.

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Section: Frp Stripsmentioning

confidence: 99%

Review of Anchorage Systems for Externally Bonded FRP Laminates

Grelle

Sneed

2013

Int J Concr Struct Mater

189

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“…Antonopoulos and Triantafillou 2003;Ghobarah and El-Amoury 2005;Pantelides and Gergely 2008;Akguzel and Pampanin 2010;Parvin et al 2010;AlSalloum et al 2011;Ilki et al 2011;Sezen 2012). In comparison to the above traditional retrofitting techniques, FRP materials have advantages such as high resistance to corrosion, excellent durability, high strength to weight ratio, and ease and speed of in-situ application (Gdoutos et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Seismic retrofitting of RC buildings using CFRP and post-tensioned metal straps: shake table tests

Garcia

Pilakoutas

Hajirasouliha

et al. 2015

Bull Earthquake Eng

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This article examines the effectiveness of two innovative retrofitting solutions at enhancing the seismic behaviour of a substandard reinforced concrete building tested on a shake table as part of the Pan-European funded project BANDIT.To simulate typical substandard construction, the reinforcement of columns and beam-column joints of the full-scale structure had inadequate detailing. An initial series of shake table tests were carried out to assess the seismic behaviour of the bare building and the effectiveness of a first retrofitting intervention using Post-Tensioned Metal Straps. After these tests, columns and joints were repaired and subsequently retrofitted using a retrofitting solution consisting of Carbon Fibre Reinforced Polymers and Post-Tensioned Metal Straps applied on opposite frames of the building. The building was then subjected to unidirectional and three-dimensional incremental seismic excitations to assess the effectiveness of the two retrofitting solutions at improving the global and local building performance. The article provides details of the above shake table testing programme and retrofitting solutions, and discusses the test results in terms of the observed damage, global damage indexes, performance levels and local strains. It is shown that whilst the original bare building was significantly damaged at a peak ground acceleration (PGA) of 0.15g, the retrofitted building resisted severe three-dimensional shake table tests up to PGA=0.60g without failure. Moreover, the retrofitting intervention enhanced the interstorey drift ratio capacity of the 1 st and 2 nd floors by 160% and 110%, respectively. Therefore, the proposed dual retrofitting system is proven to be very effective for improving the seismic performance of substandard buildings.

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“…FRPs are also utilized as external tendons for strengthening concrete structures [7][8][9]. While there are many studies on external confinement of columns or joints [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], and on flexural retrofit with near surface mounted (NSM) FRP rods or pultruded strips under monotonic loading conditions [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42], only few studies are available on flexural retrofitting using FRPs under repeated loading conditions [43][44][45]. According to the best knowledge of the authors', reversed cyclic flexural behavior of RC members strengthened with longitudinal FRP reinforcement was studied for the first time by Ilki and Kumbasar [46].…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Substandard RC Columns Retrofitted with Embedded Aramid Fiber Reinforced Polymer (AFRP) Reinforcement

et al. 2015

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Many existing reinforced concrete structures were constructed with substandard characteristics. Low quality concrete, poor transverse reinforcement details and insufficient flexural strength are among the most common deficiencies. While substandard structures are in need of retrofitting, particularly in seismic areas, problems such as high costs and disturbance to occupants are major obstacles for retrofit interventions. Fiber reinforced polymers can provide feasible retrofit solutions with minimum disturbance to occupants. In this study, the basic aim is to investigate the flexural seismic performance of substandard reinforced concrete columns retrofitted with embedded longitudinal fiber reinforced polymer reinforcement without increasing the original dimensions of the columns. In the experimental study, the reference and retrofitted columns were tested under constant vertical and reversed cyclic lateral loads. Three different connection methods of aramid fiber reinforced polymer reinforcement to the footing were investigated experimentally. A significant enhancement was obtained in lateral flexural strength through the proposed retrofitting method. Furthermore, it was observed that the cyclic lateral drift capacities of the retrofitted columns were as high as 3%, which can be deemed as quite satisfactory against seismic actions. The comparison of the experimental data with analytical calculations revealed that a conventional design approach assuming composite action between concrete and fiber reinforced polymer reinforcement can be used for flexural retrofit design. Experimental results also demonstrated that strain limit for longitudinal fiber reinforced polymer (FRP) reinforcement should be remarkably lower in case of reversed cyclic loading conditions.

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Experimental Investigation of FRP-Strengthened RC Beam-Column Joints

Cited by 318 publications

References 6 publications

Review of Anchorage Systems for Externally Bonded FRP Laminates

Review of Anchorage Systems for Externally Bonded FRP Laminates

Seismic retrofitting of RC buildings using CFRP and post-tensioned metal straps: shake table tests

Seismic Behavior of Substandard RC Columns Retrofitted with Embedded Aramid Fiber Reinforced Polymer (AFRP) Reinforcement

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