Field Performance of FRP Bridge Repairs

Stallings, J. M.; Tedesco, Joseph W.; El-Mihilmy, Mahmoud T.; McCauley, Michael W.

doi:10.1061/(asce)1084-0702(2000)5:2(107)

Cited by 69 publications

(22 citation statements)

References 2 publications

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“…Previous research addressed flexural and shear strengthening of reinforced and prestressed concrete (PS) beams using FRP (Choi et al 2011;Ibrahim Ary and Kang 2012;Kang and Ibrahim Ary 2012). Several field studies indicated that FRP materials can be used to repair impacted PS bridge girders, after large losses of concrete cross-section and rupture of a small number of prestressing strands (Di Ludovico 2003;Schiebel et al 2001;Stallings et al 2000;Tumialan et al 2001). From the previously conducted research, issues were reported related to premature debonding failures due to either inadequate transverse carbon fiber reinforced polymers (CFRP) anchors or inadequate development lengths (Rosenboom and Rizkalla 2007;Green et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

ElSafty

Graeff

Fallaha

2014

Int J Concr Struct Mater

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Many bridges are subject to lateral damage for their girders due to impact by over-height vehicles collision. In this study, the optimum configurations of carbon fiber reinforced polymers (CFRP) laminates were investigated to repair the laterally damaged prestressed concrete (PS) bridge girders. Experimental and analytical investigations were conducted to study the flexural behavior of 13 half-scale AASHTO type II PS girders under both static and fatigue loading. Lateral impact damage due to vehicle collision was simulated by sawing through the concrete of the bottom flange and slicing through one of the prestressing strands. The damaged concrete was repaired and CFRP systems (longitudinal soffit laminates and evenly spaced transverse U-wraps) were applied to restore the original flexural capacity and mitigate debonding of soffit CFRP longitudinal laminates. In addition to the static load tests for ten girders, three more girders were tested under fatigue loading cycles to investigate the behavior under simulated traffic conditions. Measurements of the applied load, the deflection at five different locations, strains along the cross-section height at mid-span, and multiple strains longitudinally along the bottom soffit were recorded. The study investigated and recommended the proper CFRP repair design in terms of the CFRP longitudinal layers and U-wrapping spacing to obtain flexural capacity improvement and desired failure modes for the repaired girders. Test results showed that with proper detailing, CFRP systems can be designed to restore the lost flexural capacity, sustain the fatigue load cycles, and maintain the desired failure mode.

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Section: Introductionmentioning

confidence: 99%

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

ElSafty

Graeff

Fallaha

2014

Int J Concr Struct Mater

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“…the bridges in the United States were built before 1940's, and nearly 42% of them were reported to be structurally deficient and below established safety standards (Stallings et al, 2000). To protect the public from unsafe bridge structures, current U.S. federal requirements necessitate local transportation authorities to visually inspect the entire inventory of well over 580,000 highway bridges biannually (Chase, 2001).…”

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confidence: 99%

A wireless structural health monitoring system with multithreaded sensing devices: design and validation

Wang

Lynch

Law

2007

Structure and Infrastructure Engineering

184

133

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Structural Health Monitoring (SHM) has become an important research problem which has the potential to monitor and ensure the performance and safety of civil structures. Traditional wire-based SHM systems require significant time and cost for cable installation. With the recent advances in wireless communication technology, wireless SHM systems have emerged as a promising alternative solution for rapid, accurate and low-cost structural monitoring. This paper presents a newly designed integrated wireless monitoring system that supports real-time data acquisition from multiple wireless sensing units. The selected wireless transceiver consumes relatively low power and supports long-distance peer-to-peer communication. In addition to hardware, embedded multithreaded software is also designed as an integral component of the proposed wireless monitoring system. A direct result of the multithreaded software paradigm is a wireless sensing unit capable of simultaneous data collection, data interrogation and wireless transmission. A reliable data communication protocol is designed and implemented, enabling robust real-time and near-synchronized data acquisition from multiple wireless sensing units. An integrated prototype system has been fabricated, assembled, and validated in both laboratory tests and a large-scale field test conducted upon the Geumdang Bridge in Icheon, South Korea.

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“…They also increase the cross-sectional area of the structural column member. Another more recent method of repair is the use of fiber reinforced polymers (FRP) because of their excellent mechanical properties, corrosion resistance, durability, light weight, ease of application, reduced construction time, efficiency, and low life cycle cost [1,2].…”

Section: Introductionmentioning

confidence: 99%

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

2014

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This paper provides a review of some of the progress in the area of fiber reinforced polymers (FRP)-strengthening of columns for several loading scenarios including impact load. The addition of FRP materials to upgrade deficiencies or to strengthen structural components can save lives by preventing collapse, reduce the damage to infrastructure, and the need for their costly replacement. The retrofit with FRP materials with desirable properties provides an excellent replacement for traditional materials, such as steel jacket, to strengthen the reinforced concrete structural members. Existing studies have shown that the use of FRP materials restore or improve the column original design strength for possible axial, shear, or flexure and in some cases allow the structure to carry more load than it was designed for. The paper further concludes that there is a need for additional research for the columns under impact loading senarios. The compiled information prepares the ground work for further evaluation of FRP-strengthening of columns that are deficient in design or are in serious need for repair due to additional load or deterioration.

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Field Performance of FRP Bridge Repairs

Cited by 69 publications

References 2 publications

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

Behavior of Laterally Damaged Prestressed Concrete Bridge Girders Repaired with CFRP Laminates Under Static and Fatigue Loading

A wireless structural health monitoring system with multithreaded sensing devices: design and validation

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

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