Cyclic behavior of concrete bridge columns retrofitted with innovative spirals

Moochul Shin, Bassem O Andrawes

Research output: Contribution to conferencePaper

Abstract

This experimental study focuses on investigating the cyclic behavior of reinforced concrete (RC) circular columns retrofitted with an innovative active confinement technique. Most of the attempts for applying active confinement using conventional materials have yielded little success due to practical difficulties associated with applying the external pressure on site. This paper investigates the feasibility of using shape memory alloy (SMA) spirals to enhance the flexural ductility and shear capacity of reinforced concrete columns under lateral cyclic loading. Four 1:3 scale RC columns are prepared and tested under quasi-static cyclic loading. Two of the tested columns are retrofitted with SMA spirals. One of these two columns is wrapped with glass FRP (GFRP) sheets in addition to the SMA spirals. For comparison, a column is confined passively with GFRP sheets and another column is tested in its as-built condition. The experimental results show that the actively confined columns exhibit superior performance to passively confined and unconfined columns. This superior behavior is primarily attributed to the increase in concrete strength and ultimate strain associated with active confinement. Also, SMA spirals show an outstanding ability to mitigate the damage sustained by the columns.

Original languageEnglish (US)
Pages701-708
Number of pages8
DOIs
StatePublished - Jan 1 2010
EventStructures Congress 2010 - Orlando, FL, United States
Duration: May 12 2010May 15 2010

Other

OtherStructures Congress 2010
CountryUnited States
CityOrlando, FL
Period5/12/105/15/10

Fingerprint

Concrete bridges
Shape memory effect
Reinforced concrete
Glass
Ductility
Concretes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

Cite this

Shin, M., & Andrawes, B. O. (2010). Cyclic behavior of concrete bridge columns retrofitted with innovative spirals. 701-708. Paper presented at Structures Congress 2010, Orlando, FL, United States. https://doi.org/10.1061/41130(369)64

Cyclic behavior of concrete bridge columns retrofitted with innovative spirals. / Shin, Moochul; Andrawes, Bassem O.

2010. 701-708 Paper presented at Structures Congress 2010, Orlando, FL, United States.

Research output: Contribution to conferencePaper

Shin, M & Andrawes, BO 2010, 'Cyclic behavior of concrete bridge columns retrofitted with innovative spirals', Paper presented at Structures Congress 2010, Orlando, FL, United States, 5/12/10 - 5/15/10 pp. 701-708. https://doi.org/10.1061/41130(369)64
Shin M, Andrawes BO. Cyclic behavior of concrete bridge columns retrofitted with innovative spirals. 2010. Paper presented at Structures Congress 2010, Orlando, FL, United States. https://doi.org/10.1061/41130(369)64
Shin, Moochul ; Andrawes, Bassem O. / Cyclic behavior of concrete bridge columns retrofitted with innovative spirals. Paper presented at Structures Congress 2010, Orlando, FL, United States.8 p.
@conference{10f75a5c05b645ddac74d2bf82d2ace4,
title = "Cyclic behavior of concrete bridge columns retrofitted with innovative spirals",
abstract = "This experimental study focuses on investigating the cyclic behavior of reinforced concrete (RC) circular columns retrofitted with an innovative active confinement technique. Most of the attempts for applying active confinement using conventional materials have yielded little success due to practical difficulties associated with applying the external pressure on site. This paper investigates the feasibility of using shape memory alloy (SMA) spirals to enhance the flexural ductility and shear capacity of reinforced concrete columns under lateral cyclic loading. Four 1:3 scale RC columns are prepared and tested under quasi-static cyclic loading. Two of the tested columns are retrofitted with SMA spirals. One of these two columns is wrapped with glass FRP (GFRP) sheets in addition to the SMA spirals. For comparison, a column is confined passively with GFRP sheets and another column is tested in its as-built condition. The experimental results show that the actively confined columns exhibit superior performance to passively confined and unconfined columns. This superior behavior is primarily attributed to the increase in concrete strength and ultimate strain associated with active confinement. Also, SMA spirals show an outstanding ability to mitigate the damage sustained by the columns.",
author = "Moochul Shin and Andrawes, {Bassem O}",
year = "2010",
month = "1",
day = "1",
doi = "10.1061/41130(369)64",
language = "English (US)",
pages = "701--708",
note = "Structures Congress 2010 ; Conference date: 12-05-2010 Through 15-05-2010",

}

TY - CONF

T1 - Cyclic behavior of concrete bridge columns retrofitted with innovative spirals

AU - Shin, Moochul

AU - Andrawes, Bassem O

PY - 2010/1/1

Y1 - 2010/1/1

N2 - This experimental study focuses on investigating the cyclic behavior of reinforced concrete (RC) circular columns retrofitted with an innovative active confinement technique. Most of the attempts for applying active confinement using conventional materials have yielded little success due to practical difficulties associated with applying the external pressure on site. This paper investigates the feasibility of using shape memory alloy (SMA) spirals to enhance the flexural ductility and shear capacity of reinforced concrete columns under lateral cyclic loading. Four 1:3 scale RC columns are prepared and tested under quasi-static cyclic loading. Two of the tested columns are retrofitted with SMA spirals. One of these two columns is wrapped with glass FRP (GFRP) sheets in addition to the SMA spirals. For comparison, a column is confined passively with GFRP sheets and another column is tested in its as-built condition. The experimental results show that the actively confined columns exhibit superior performance to passively confined and unconfined columns. This superior behavior is primarily attributed to the increase in concrete strength and ultimate strain associated with active confinement. Also, SMA spirals show an outstanding ability to mitigate the damage sustained by the columns.

AB - This experimental study focuses on investigating the cyclic behavior of reinforced concrete (RC) circular columns retrofitted with an innovative active confinement technique. Most of the attempts for applying active confinement using conventional materials have yielded little success due to practical difficulties associated with applying the external pressure on site. This paper investigates the feasibility of using shape memory alloy (SMA) spirals to enhance the flexural ductility and shear capacity of reinforced concrete columns under lateral cyclic loading. Four 1:3 scale RC columns are prepared and tested under quasi-static cyclic loading. Two of the tested columns are retrofitted with SMA spirals. One of these two columns is wrapped with glass FRP (GFRP) sheets in addition to the SMA spirals. For comparison, a column is confined passively with GFRP sheets and another column is tested in its as-built condition. The experimental results show that the actively confined columns exhibit superior performance to passively confined and unconfined columns. This superior behavior is primarily attributed to the increase in concrete strength and ultimate strain associated with active confinement. Also, SMA spirals show an outstanding ability to mitigate the damage sustained by the columns.

UR - http://www.scopus.com/inward/record.url?scp=84861738615&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861738615&partnerID=8YFLogxK

U2 - 10.1061/41130(369)64

DO - 10.1061/41130(369)64

M3 - Paper

AN - SCOPUS:84861738615

SP - 701

EP - 708

ER -