Numerical investigation of H-shaped short steel piles with localized severe corrosion

Shi, Cheng; Karagah, Hossein; Dawood, Mina; Belarbi, Abdeldjelil

doi:10.1016/j.engstruct.2014.04.048

Cited by 45 publications

(12 citation statements)

References 9 publications

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“…Overall, the location change of localized pitting damage has a subtle effect on the reduction of ultimate strength under the same DOV, being similar to that with localized uniform corrosion [34]. Figure 9 shows that the shape ratio rather than the DOV played a critical role to cause strength variation.…”

Section: Location Effectmentioning

confidence: 74%

Compressive strength of tubular members with localized pitting damage considering variation of corrosion features

2020

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Localized pitting corrosion often occurs on marine and offshore structures in the form of patch corrosion with great uncertainties in the location, size and shape. The variation of corrosion features affects ultimate strength of tubular members significantly, but it is still not well understood. This paper presents a numerical study on tubular members of diverse slenderness ratios to clarify the localized pitting effect on ultimate strength. Numerical analyses were performed based on novel models of pitted members that were calibrated against benchmark column tests. Corrosion pits were randomly introduced on the local outside surfaces of members via stochastic simulation, forming corrosion patches varied in the location, size and shape. Numerical results obtained were regressed to propose a unified empirical formula to predict ultimate strength. It turned out that the shape of the corrosion patch has a significant influence on the ultimate strength. The shape change of the patch can alter failure modes of medium length columns. The reduction of ultimate strength is closely related to the shape ratio of the patch besides the volume loss of corroded material. The unified empirical formula incorporating the shape ratio and the volume loss shows a good ability to predict the experimental results.

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Section: Location Effectmentioning

confidence: 74%

Compressive strength of tubular members with localized pitting damage considering variation of corrosion features

2020

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“…V sa ¼ 0:6 A se f uta (3) The first crack in each of the specimens C4 through C7 was a horizontal crack that developed at the levels of the HS bolts along the edges of the UHPC plates attached to the flanges of the steel H-pile, which is attributed to the small edge distance, equals to 38.1 mm (1.5 in. ), of the bolts in the UHPC plates (Figure 2c).…”

Section: Performance Of the Test Specimens And Failure Modesmentioning

confidence: 99%

“…Steel H-piles are commonly used as a substructure in bridge construction in the U.S. Some of these piles are subjected to acidic environmental exposure, repeated wet-dry cycles, or both, causing corrosion which leads to section loss and reduction in their axial load capacities, compromising the integrity of the bridges supported by these piles (1)(2)(3). Therefore, these corroded steel Hpiles are in urgent need of repair.…”

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confidence: 99%

Innovative Approach to Repair Corroded Steel Piles using Ultra-High Performance Concrete

Shrestha

Gheni

Abdulazeez

et al. 2020

Transportation Research Record

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Steel H-piles are a common structural system in existing bridges. Many steel H-piles have been corroded as a result of severe weather and acid/alkaline salt exposures, causing a reduction in the axial load capacity. This paper experimentally investigates the use of ultra-high performance concrete (UHPC) encasement as a novel repair method for corroded steel H-pile. UHPC displays better tensile strength, early compressive strength, workability, and durability compared with conventional concrete. The proposed repair is used to bridge the corroded section in H-pile using either a cast-in-place or precast UHPC elements. A series of push-out tests was conducted on eight full-scale piles to assess the axial force that can be transferred through shear studs and bond between the UHPC and steel piles. The test parameters include the type of casting of the UHPC, that is, cast-in-place versus precast elements, thickness and shape of the UHPC elements, an inclusion of carbon fiber reinforced polymer (CFRP) grid, number and grade of bolts, an inclusion of washer, and applying torque on the bolts. The experimental work demonstrated that the UHPC precast repair can be easily implemented. Moreover, using 57 mm (2.25 in.) thick UHPC plates reinforced by two layers of the CFRP grid was capable of transferring up to 81% of the squash load of the H-pile.

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“…Steel H-piles have been used widely in bridge construction throughout the U.S. because of their relatively large load-carrying capacity while occupying a small area. As a result of their exposure to repeated wetting and drying cycles throughout their service life, many H-piles suffer from corrosion, which impairs their structural integrity, capacity, and serviceability and can lead to abrupt collapses (1)(2)(3)(4).…”

mentioning

confidence: 99%

Interfacial Shear Bond Strength between Steel H-Piles and Polymer Concrete Jackets

Abdulazeez

Brown

ElGawady

2020

Transportation Research Record

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Steel H-piles have been used widely in bridge construction throughout the U.S. because of their relatively large load-carrying capacity while occupying a small area. However, many H-piles suffer from corrosion, which may lead to abrupt collapse. A cost-effective repair technique, including encasing the corroded region of the steel pile into a concrete jacket, which acts as an alternative load path for the applied axial load, has been used by several state Departments of Transportation. Methyl methacrylate polymer concrete (MMA-PC) is a type of concrete that is commonly used as a repair material. However, there is limited research on the assessment of bond strength between MMA-PC and steel elements. This paper investigates experimentally the bond behavior of seven full-scale steel H-piles encased in concrete jackets. The jackets were cast using either MMA-PC or Portland cement concrete (CC). Different embedment lengths of 63.5 mm (2.5 in.), 127 mm (5 in.), and 190.5 mm (7.5 in.) were used for the MMA-PC and one embedment length of 254 mm (10 in.) was used for the CC jacket. Cylindrical and prismatic jacket configurations were used and tested using push-out. The experimental results revealed that using the MMA-PC jacket was more effective compared with the CC jacket in relation to the load-carrying capacity. For design purposes, a shear bond stress of 2.96 MPa [0.43 kips per square inch (ksi)] can be used for MMA-PC jackets having an embedment length of at least 127 mm (5 in.) whereas a value of 0.83 MPa (0.12 ksi) can be used for CC.

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Numerical investigation of H-shaped short steel piles with localized severe corrosion

Cited by 45 publications

References 9 publications

Compressive strength of tubular members with localized pitting damage considering variation of corrosion features

Compressive strength of tubular members with localized pitting damage considering variation of corrosion features

Innovative Approach to Repair Corroded Steel Piles using Ultra-High Performance Concrete

Interfacial Shear Bond Strength between Steel H-Piles and Polymer Concrete Jackets

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