Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints

Saeed S Mahini; Habib Reza Pilvar; Hamid Reza Ronagh

Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints

Saeed S Mahini, Habib Reza Pilvar, Hamid Reza Ronagh

Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

It is now generally accepted that beam-column joints are critical regions in reinforced concrete (RC) frames designed for inelastic response to severe seismic attack. Inadequately detailed joints, especially exterior ones, have been identified as critical structural elements that may fail prematurely due to high shear stresses [1]. Strengthening of RC joints is a rather difficult task. A variety of techniques have been applied to joints, with the most common being the construction of RC or steel jackets. The rehabilitation of RC columns jacketed with carbon fibre-reinforced plastic (FRP) composites for improving shear strength, confinement, and ductility has received considerable attention in recent years. An extensive test on 18, 2/3 scale exterior joints was carried out by Antonopoulos and Triantafillou [2]. Ghobarah and Said [3], developed design methodology for fibre jacketing to upgrade the shear capacity of existing beam-column joints in RC moment resisting frames. Smith and Shrestha [4] carried out a concise but systematic review of experimental research on the strengthening of RC connections with FRP in addition to an evaluation of the effectiveness of the strengthening schemes. Smith and Shrestha noted that four different types of deficiencies have been introduced into connections that require strengthening with FRP. These are shear strengthening, anchorage strengthening, shear and anchorage strengthening and plastic hinge relocation. Recently, Shrestha and Smith [5] reported the results of a detailed experimental investigation on the FRP strengthened RC beam-column connections subjected to monotonic loading and compared these results with their proposed analytical model. The aim of this study is to fill the gaps that exist in the current state of knowledge for the FRP strengthening of joints worldwide. In this paper, a truss analogy proposed by Hwang and Lee [6] for unstrengthened exterior beam-column joints has been further developed to cover the shear strength of FRP-strengthened joints. The method is checked against numerical analyses that are calibrated with available experimental results. The numerical analysis is extensive and is performed with the latest version of ANSYS software.

Original language	English
Title of host publication	International Symposium of the Fiber-Reinforced Polymer Reinforcement for Reinforced Concrete Structures (FRPRCS-9)
Editors	Oehlers, Deric John., Griffith, M. C. (Michael C.), Seracino, R.
Place of Publication	Adelaide, Australia
Publisher	University of Adelaide
Pages	1-4
ISBN (Print)	9780980675504
Publication status	Published - 2009
Event	FRPRCS-9: 9th International Symposium on Fibre Reinforced Polymer Reinforcement for Concrete Structures - Sydney, Australia Duration: 13 Jul 2009 → 15 Jul 2009

Conference

Conference	FRPRCS-9: 9th International Symposium on Fibre Reinforced Polymer Reinforcement for Concrete Structures
City	Sydney, Australia
Period	13/07/09 → 15/07/09

Keywords

Composite and Hybrid Materials
Polymers and Plastics
Structural Engineering

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https://hdl.handle.net/1959.11/15436

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Mahini, S. S., Pilvar, H. R., & Ronagh, H. R. (2009). Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints. In Oehlers, D. John., Griffith, M. C. (Michael C.), Seracino, & R. (Eds.), International Symposium of the Fiber-Reinforced Polymer Reinforcement for Reinforced Concrete Structures (FRPRCS-9) (pp. 1-4). University of Adelaide. https://hdl.handle.net/1959.11/15436

Mahini, Saeed S ; Pilvar, Habib Reza ; Ronagh, Hamid Reza. / Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints. International Symposium of the Fiber-Reinforced Polymer Reinforcement for Reinforced Concrete Structures (FRPRCS-9). editor / Oehlers ; Deric John. ; Griffith ; M. C. (Michael C.) ; Seracino ; R. Adelaide, Australia : University of Adelaide, 2009. pp. 1-4

@inproceedings{4fce31e4149145d39422a53d01d78294,

title = "Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints",

abstract = "It is now generally accepted that beam-column joints are critical regions in reinforced concrete (RC) frames designed for inelastic response to severe seismic attack. Inadequately detailed joints, especially exterior ones, have been identified as critical structural elements that may fail prematurely due to high shear stresses [1]. Strengthening of RC joints is a rather difficult task. A variety of techniques have been applied to joints, with the most common being the construction of RC or steel jackets. The rehabilitation of RC columns jacketed with carbon fibre-reinforced plastic (FRP) composites for improving shear strength, confinement, and ductility has received considerable attention in recent years. An extensive test on 18, 2/3 scale exterior joints was carried out by Antonopoulos and Triantafillou [2]. Ghobarah and Said [3], developed design methodology for fibre jacketing to upgrade the shear capacity of existing beam-column joints in RC moment resisting frames. Smith and Shrestha [4] carried out a concise but systematic review of experimental research on the strengthening of RC connections with FRP in addition to an evaluation of the effectiveness of the strengthening schemes. Smith and Shrestha noted that four different types of deficiencies have been introduced into connections that require strengthening with FRP. These are shear strengthening, anchorage strengthening, shear and anchorage strengthening and plastic hinge relocation. Recently, Shrestha and Smith [5] reported the results of a detailed experimental investigation on the FRP strengthened RC beam-column connections subjected to monotonic loading and compared these results with their proposed analytical model. The aim of this study is to fill the gaps that exist in the current state of knowledge for the FRP strengthening of joints worldwide. In this paper, a truss analogy proposed by Hwang and Lee [6] for unstrengthened exterior beam-column joints has been further developed to cover the shear strength of FRP-strengthened joints. The method is checked against numerical analyses that are calibrated with available experimental results. The numerical analysis is extensive and is performed with the latest version of ANSYS software.",

keywords = "Composite and Hybrid Materials, Polymers and Plastics, Structural Engineering",

author = "Mahini, \{Saeed S\} and Pilvar, \{Habib Reza\} and Ronagh, \{Hamid Reza\}",

year = "2009",

language = "English",

isbn = "9780980675504",

pages = "1--4",

editor = "Oehlers and Deric John. and Griffith and \{C. (Michael C.)\}, M. and Seracino and R.",

booktitle = "International Symposium of the Fiber-Reinforced Polymer Reinforcement for Reinforced Concrete Structures (FRPRCS-9)",

publisher = "University of Adelaide",

note = "FRPRCS-9: 9th International Symposium on Fibre Reinforced Polymer Reinforcement for Concrete Structures ; Conference date: 13-07-2009 Through 15-07-2009",

}

Mahini, SS, Pilvar, HR & Ronagh, HR 2009, Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints. in Oehlers, D John., Griffith, M C. (Michael C.), Seracino & R. (eds), International Symposium of the Fiber-Reinforced Polymer Reinforcement for Reinforced Concrete Structures (FRPRCS-9). University of Adelaide, Adelaide, Australia, pp. 1-4, FRPRCS-9: 9th International Symposium on Fibre Reinforced Polymer Reinforcement for Concrete Structures, Sydney, Australia, 13/07/09. <https://hdl.handle.net/1959.11/15436>

Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints. / Mahini, Saeed S; Pilvar, Habib Reza; Ronagh, Hamid Reza.
International Symposium of the Fiber-Reinforced Polymer Reinforcement for Reinforced Concrete Structures (FRPRCS-9). ed. / Oehlers; Deric John.; Griffith; M. C. (Michael C.); Seracino; R. Adelaide, Australia: University of Adelaide, 2009. p. 1-4.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints

AU - Mahini, Saeed S

AU - Pilvar, Habib Reza

AU - Ronagh, Hamid Reza

PY - 2009

Y1 - 2009

N2 - It is now generally accepted that beam-column joints are critical regions in reinforced concrete (RC) frames designed for inelastic response to severe seismic attack. Inadequately detailed joints, especially exterior ones, have been identified as critical structural elements that may fail prematurely due to high shear stresses [1]. Strengthening of RC joints is a rather difficult task. A variety of techniques have been applied to joints, with the most common being the construction of RC or steel jackets. The rehabilitation of RC columns jacketed with carbon fibre-reinforced plastic (FRP) composites for improving shear strength, confinement, and ductility has received considerable attention in recent years. An extensive test on 18, 2/3 scale exterior joints was carried out by Antonopoulos and Triantafillou [2]. Ghobarah and Said [3], developed design methodology for fibre jacketing to upgrade the shear capacity of existing beam-column joints in RC moment resisting frames. Smith and Shrestha [4] carried out a concise but systematic review of experimental research on the strengthening of RC connections with FRP in addition to an evaluation of the effectiveness of the strengthening schemes. Smith and Shrestha noted that four different types of deficiencies have been introduced into connections that require strengthening with FRP. These are shear strengthening, anchorage strengthening, shear and anchorage strengthening and plastic hinge relocation. Recently, Shrestha and Smith [5] reported the results of a detailed experimental investigation on the FRP strengthened RC beam-column connections subjected to monotonic loading and compared these results with their proposed analytical model. The aim of this study is to fill the gaps that exist in the current state of knowledge for the FRP strengthening of joints worldwide. In this paper, a truss analogy proposed by Hwang and Lee [6] for unstrengthened exterior beam-column joints has been further developed to cover the shear strength of FRP-strengthened joints. The method is checked against numerical analyses that are calibrated with available experimental results. The numerical analysis is extensive and is performed with the latest version of ANSYS software.

AB - It is now generally accepted that beam-column joints are critical regions in reinforced concrete (RC) frames designed for inelastic response to severe seismic attack. Inadequately detailed joints, especially exterior ones, have been identified as critical structural elements that may fail prematurely due to high shear stresses [1]. Strengthening of RC joints is a rather difficult task. A variety of techniques have been applied to joints, with the most common being the construction of RC or steel jackets. The rehabilitation of RC columns jacketed with carbon fibre-reinforced plastic (FRP) composites for improving shear strength, confinement, and ductility has received considerable attention in recent years. An extensive test on 18, 2/3 scale exterior joints was carried out by Antonopoulos and Triantafillou [2]. Ghobarah and Said [3], developed design methodology for fibre jacketing to upgrade the shear capacity of existing beam-column joints in RC moment resisting frames. Smith and Shrestha [4] carried out a concise but systematic review of experimental research on the strengthening of RC connections with FRP in addition to an evaluation of the effectiveness of the strengthening schemes. Smith and Shrestha noted that four different types of deficiencies have been introduced into connections that require strengthening with FRP. These are shear strengthening, anchorage strengthening, shear and anchorage strengthening and plastic hinge relocation. Recently, Shrestha and Smith [5] reported the results of a detailed experimental investigation on the FRP strengthened RC beam-column connections subjected to monotonic loading and compared these results with their proposed analytical model. The aim of this study is to fill the gaps that exist in the current state of knowledge for the FRP strengthening of joints worldwide. In this paper, a truss analogy proposed by Hwang and Lee [6] for unstrengthened exterior beam-column joints has been further developed to cover the shear strength of FRP-strengthened joints. The method is checked against numerical analyses that are calibrated with available experimental results. The numerical analysis is extensive and is performed with the latest version of ANSYS software.

KW - Composite and Hybrid Materials

KW - Polymers and Plastics

KW - Structural Engineering

M3 - Conference contribution

SN - 9780980675504

SP - 1

EP - 4

BT - International Symposium of the Fiber-Reinforced Polymer Reinforcement for Reinforced Concrete Structures (FRPRCS-9)

A2 - Oehlers, null

A2 - John., Deric

A2 - Griffith, null

A2 - C. (Michael C.), M.

A2 - Seracino, null

A2 - R., null

PB - University of Adelaide

CY - Adelaide, Australia

T2 - FRPRCS-9: 9th International Symposium on Fibre Reinforced Polymer Reinforcement for Concrete Structures

Y2 - 13 July 2009 through 15 July 2009

ER -

Truss Analogy for the Design of FRP- Retrofitted RC Exterior Beam-Column Joints

Abstract

Conference

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