Dilek, Ufuk

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Profile URL
https://hdl.handle.net/20.500.14365/7310
Name Variants
Dilek, U.
Job Title
Email Address
udilek@gmail.com
Main Affiliation
05.03. Civil Engineering
Status
Former Staff
Website
ORCID ID
0000-0002-6161-0983
Scopus Author ID
6602145491
Turkish CoHE Profile ID
2D8A74755AEC2DB1
Google Scholar ID
WoS Researcher ID
ESG-2466-2022

Sustainable Development Goals

Documents

31

Citations

227

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8

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20

Citations

162

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Scholarly Output

6

Articles

4

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Supervised MSc Theses

0

Supervised PhD Theses

0

WoS Citation Count

24

Scopus Citation Count

29

WoS h-index

2

Scopus h-index

2

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0

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0

WoS Citations per Publication

4.00

Scopus Citations per Publication

4.83

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0

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0

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    Citation - WoS: 3
    Citation - Scopus: 4
    Comparison of Nondestructive Evaluation Findings, Constrained and Unconstrained Wave Speeds, Dynamic Moduli, and Poisson's Ratio of Core Specimens From a Concrete Structure Damaged by Fire
    (Asce-Amer Soc Civil Engineers, 2015) Dilek, Ufuk; Reis, Engin
    This article discusses the use of nondestructive and subsequent laboratory materials testing techniques in evaluation of extent of fire damage to a precast prestressed parking structure. The nondestructive and laboratory testing findings were used in determination of extent of fire damage to concrete and potential effects on the prestressing tendons. The in-situ nondestructive testing phase consisted of scanning affected areas using ultrasonic pulse velocity through concrete members and use of impact echo on a confirmatory limited basis. Subsequently, cores were removed and tested for resonant frequency-based dynamic modulus in accordance with ASTM C 215. Upon determination of dynamic elastic modulus of the entire core per ASTM C 215, the cores were sawn into 25-mm (1-in.) disks. Young's modulus of individual disks was determined by utilizing nondestructive measurement of resonant frequency. Determination of Young's modulus at small depth increments permitted assessment of the heat-induced damage gradient into the concrete and more importantly at the level of the prestressing tendons. The data from multiple techniques provided a means of comparison between constrained in-situ ASTM C 597 pulse velocity to unconstrained compression wave velocity obtained from ASTM C 1383, and an estimated unconstrained compression wave velocity based on dynamic modulus based on disks. The results of these comparisons should be of value to practicing engineers utilizing these techniques in forensic evaluations. (C) 2014 American Society of Civil Engineers.
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    Article
    Citation - WoS: 1
    Nondestructive Radiographic Evaluation and Repairs To a Prestressed Concrete Parking Structure Following Partial Collapse
    (Asce-Amer Soc Civil Engineers, 2015) Reis, Engin Murat; Dilek, Ufuk
    This paper presents use of radiographic imaging (X-ray) in evaluation of existing reinforcing steel and tendon configuration of a structure following a collapse and development of steel retrofit and carbon-fiber-reinforced polymer (CFRP) repairs. A collapsed section in the driving surface in a precast concrete parking deck prompted an engineering evaluation and survey of the entire deck for assessment and repairs to distressed members. Distress was identified in decking members and perimeter spandrel beams in varying forms and degrees. Repairs to the decking members involved supporting the distressed decking using supplemental steel retrofit brackets installed through the double-Tee stems containing prestressing tendons. The precise location of the tendons in the stems needed to be identified to implement this repair in order not to damage the tendons during drilling for through-stem anchors. Radiographic X-ray imaging in this application enabled locating and avoiding the tendons in the stems to support and strengthen the decking member. The supplemental steel brackets also enabled continued and improved operation of an existing expansion joint in the area of repair. Radiographic evaluation technique was also used in identification of steel reinforcement configuration in the perimeter spandrel beams exhibiting cracking at bearing locations with maximum shear. Radiographic exposures were used for evaluation of existing steel configuration and development of CFRP repairs. CFRP repairs were implemented in perimeter spandrel beams while decking surfaces were retrofitted with steel brackets to support the driving surfaces and enable continued expansion and contraction in the existing expansion joints. (C) 2014 American Society of Civil Engineers.