Effect of Cold Regions Climate on Composite Jacketed Concrete Columns

Karbhari, Vistasp M.; Eckel, Douglas A.

doi:10.1061/(asce)0887-381x(1994)8:3(73)

Cited by 27 publications

(14 citation statements)

References 8 publications

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“…Rather, the cylinders wrapped with CFRP sheets exhibited a slight increase in compressive strength due to the exposure to the freeze-thaw cycles. In an earlier study performed by Karbhari and Eckel [11] similar results were observed. They placed the standard cylinders (B152 mm · 305 mm) wrapped with different FRP sheets under extremely low temperature, À18°C, instead of freeze-thaw cycles, to simulate the cold climate.…”

Section: Introductionsupporting

confidence: 92%

An experimental study on the effect of environmental exposures and corrosion on RC columns with FRP composite jackets

Belarbi

Bae

2007

Composites Part B: Engineering

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Section: Introductionsupporting

confidence: 92%

An experimental study on the effect of environmental exposures and corrosion on RC columns with FRP composite jackets

Belarbi

Bae

2007

Composites Part B: Engineering

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“…Rather, the failure load, P u , slightly increased after the exposure to the freeze-thaw cycles; as shown in Table 5, the average failure load, P u , of Columns S-C1-F/Th and S-G1-F/Th was 6% and 5% higher than that of Columns S-C1-CONT and S-G1-CONT, respectively. One reason for the increase in failure load, P u , could be the matrix hardening effect due to the extremely low temperature used in the freeze-thaw cycles as reported previously by other research studies [9]. As a result, the axial rigidity in the plastic region, (EA) 2 , increased as shown in Table 5; the average axial rigidity in the plastic region, (EA) 2 , of Columns S-C1-F/Th and S-G1-F/Th was 12% and 10% higher than those of Columns S-C1-CONT and S-G1-CONT, respectively.…”

Section: Effects Of Freeze-thaw Cyclesmentioning

confidence: 86%

Effects of Various Environmental Conditions on RC Columns Wrapped with FRP Sheets

Bae

Belarbi

2008

Journal of Reinforced Plastics and Composites

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A majority of the existing research studies focus on the effects of individual environmental conditions, such as freeze-thaw cycles and wet-dry cycles, while investigations on the combined effects of various environmental conditions are very rare. Therefore, the objective of this study was to evaluate the effects of various environmental conditions on reinforced concrete (RC) columns wrapped with FRP sheets with focus on the combined effects. Two different scales of RC columns wrapped with carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) sheets were conditioned under various environmental conditions. Then, uni-axial compression tests were conducted in order to evaluate their strength, stiffness, and ductility. The environmental conditions considered in this study included freeze-thaw cycles, high-temperature cycles, high-humidity cycles, ultraviolet (UV) radiation, and saline solution. Based on the test results, design guidelines were suggested, which included equations to determine axial capacity of RC columns wrapped with FRP sheets, and strength reduction factors to account for the effects of environmental conditions considered in this study.

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“…The behavior of composite wraps under extreme temperatures is investigated in the work by Karbhari and Eckel [22].…”

Section: Literature Reviewmentioning

confidence: 99%

Monitoring of Long-Term Performance of Highway Bridge Columns Retrofitted by Advanced Composite Jackets in Indiana

Teng¹,

Sotelino²,

Chen³

2000

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Prepared in cooperation with the Indiana Department of Transportation and Federal Highway Administration. AbstractThe service life of highway bridges is limited by the deterioration of their substructure components. In the U.S., it is estimated that more than 240,000 (about 40%) of the highway bridges are functionally or structurally deficient. Repairing these deteriorated bridges using traditional methods is usually time-consuming and expensive. Furthermore, these methods are such that they can cause a number of problems, such as being a threat to public safety and severe traffic disruption. Thus, it is important that new safer and more efficient methods be developed. Fiber Reinforced Plastics (FRP) have a great potential to provide such a solution. Due to their superior material properties, such as corrosion-resistance and costeffectiveness, FRP composite materials have been effectively used in a wide variety of applications in a number of industries. In recent years, prototype projects in civil infrastructure have demonstrated the effectiveness and the benefits of the use FRP in this industry. However, the long-term performance of FRP-wrapped columns, under severe environmental conditions has not yet been fully assessed, and thus requires further investigation. This research assesses their performance in terms of corrosion resistance and freeze-thaw effect. This has been accomplished through field monitoring, field inspection, and laboratory tests. . . Key WordsFiber Reinforced Plastics (FRP), Civil infrastructure rehabilitation, Composites, Reinforced concrete columns, Corrosion resistance, Freeze-thaw effect IntroductionIn the summer of 1997, the bridge piers at the junction of Indiana state highway I-69 and U.S.14 were repaired by the GFRP (Glass FiberReinforced Plastics) wrapping system, which is one of the applications of advanced composites. There are several reasons why this bridge was in need of rehabilitation. First, the use of deicing salt caused the bridge piers to deteriorate due to corrosion. Secondly, aging, heavy traffic loads, and severe environmental conditions, such as extremely cold temperatures and large temperature changes magnified this deterioration process.These types of composite materials have been used extensively in the West Coast, especially in California, primarily for seismic rehabilitation, and in some eastern states for corrosion protection or strengthening. They have also been used in many other industries, such as aerospace, automotive, chemical, shipbuilding, etc., for decades.Due to their superior material properties, such as corrosion-resistance and cost-effectiveness, composites have been effectively used in a wide variety of applications in civil engineering construction in recent years. However, the longterm performance of FRP-wrapped columns, under severe environmental conditions, has not yet been fully assessed, and thus requires further investigation. FindingsThe environmental effects on the long-term performance of the FRP composites wrapped columns in Indiana ha...

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Effect of Cold Regions Climate on Composite Jacketed Concrete Columns

Cited by 27 publications

References 8 publications

An experimental study on the effect of environmental exposures and corrosion on RC columns with FRP composite jackets

An experimental study on the effect of environmental exposures and corrosion on RC columns with FRP composite jackets

Effects of Various Environmental Conditions on RC Columns Wrapped with FRP Sheets

Monitoring of Long-Term Performance of Highway Bridge Columns Retrofitted by Advanced Composite Jackets in Indiana

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