Assessment of Fire Damage to a Reinforced Concrete Structure during Construction

Dilek, Ufuk

doi:10.1061/(asce)0887-3828(2007)21:4(257)

Cited by 23 publications

(25 citation statements)

References 1 publication

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“…A method of determining the dynamic elastic modulus of circular concrete disks based on resonant frequency is discussed in detail by Leming et al [4]. This method of determining Young's Modulus of thin disks was successfully used in forensic concrete evaluations involving damage gradients [5,6] and particularly fire damage evaluations [7,8].…”

Section: Methodology For Laboratory Analysis Of Concrete Core Samplesmentioning

confidence: 99%

Non-Destructive Evaluation and Laboratory Testing of a Concrete Structure Damaged by Fire

Reis

Dilek

2012

Forensic Engineering 2012

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This article discusses the use of non-destructive and subsequent laboratory materials testing techniques in evaluation of extent of fire damage to a precast prestressed parking structure. The non-destructive and laboratory testing findings were used in determination of extent of heat damage to concrete and potential effects on the pre-stressing tendons. The in-situ non-destructive testing phase consisted of locating affected areas using ultrasonic pulse velocity through concrete members in the vicinity of the fire. Subsequently cores were removed and Young's Modulus of 25mm (1 inch) thick concrete disks was determined by utilizing non-destructive measurement of resonant frequency. Determination of Young's Modulus at small depth increments permitted assessment of the heat induced damage front into the concrete and more importantly at the level of the pre-stressing tendons. Based on the extent of damage identified, repairs were performed on the affected members.

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Section: Methodology For Laboratory Analysis Of Concrete Core Samplesmentioning

confidence: 99%

Non-Destructive Evaluation and Laboratory Testing of a Concrete Structure Damaged by Fire

Reis

Dilek

2012

Forensic Engineering 2012

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“…Figure 4.28 shows the test setup of a cylindrical specimen instrumented in torsional mode with the associated accelerometer sensor, data acquisition hardware, and computer software analyzing the signal using a fast Fourier transform for dominant frequency. The resonant principle of ASTM C 215 adapted for thin circular disks sawed from cores found applications in assessment of damage and damage gradients (leming et al, 1998;Dilek and leming, 2008;Dilek, 2006bDilek, , 2007a performed in combination with petrographic evaluations of concrete. ASTM C 457 results, in conjunction with fresh concrete unit weights, and ASTM C 642 results are generally used in resolving whether the concrete was adequately air-entrained and whether it meets the airentrainment requirements of the specification.…”

Section: Laboratory Testing Of Core Samplesmentioning

confidence: 99%

Condition assessment of concrete structures

Dilek¹

2009

Failure, Distress and Repair of Concrete Structures

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“…However, HFT is not yet widely accepted or properly validated for whole frame reinforced concrete structures. Berry [1991], Srinivasan et al [2007], Sivagnanam [2002], Nene and Kavle [1992], Morales [1992], Smart [2006], Dilek [2005Dilek [ , 2007, Taerwe et al [2006], Peker and Pekmezci [2003], Boam andCopper [1994], Cabrita Neves et al [1997], and Calavera et al [1992]. A Recent report by Meacham et al (2012) is also relevant.…”

Section: Laboratory Settingsmentioning

confidence: 99%