Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/15821
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dc.coverage.spatialCivil engineeringen_US
dc.date.accessioned2014-02-12T05:44:50Z-
dc.date.available2014-02-12T05:44:50Z-
dc.date.issued2014-02-12-
dc.identifier.urihttp://hdl.handle.net/10603/15821-
dc.description.abstractReinforced and prestressed concrete are widely used for the construction of major civil engineering structures. Concrete structures undergo distress with time due to environmental and other unfavorable operating conditions. To assess the safety and serviceability of the distressed concrete structure and to take decision on the possible repair measures, it is necessary to reliably estimate the existing level of stress. Determination of in-situ stress on the concrete surface is one way to assess the prestressing force available in the prestressed concrete members. Assessing the existing level of stress in prestressed concrete structures in service is fairly a difficult task and theengineers are often faced with lack of actual design / construction details and environmental service conditions. In-situ stress determination is based on the measurement of strain release due to local elastic stress relief, caused by core drilling and creation of stress-free boundaries.Three techniques, namely concrete core-drilling technique, concrete core trepanning technique and concrete core-drilling strain gage technique (CDSG) were developed to evaluate the in-situ stress under uniaxial and biaxial stress conditions. Concrete core-drilling technique is an experimental technique for assessment of in-situ stress under uniaxial stress condition. This technique wasdeveloped by using a special arrangement of electrical resistance strain gages suitably placed along radial- and tangential- directions of the intended core. These gages are connected through a Wheatstone bridge circuit, in full bridge configuration, to magnify the response of the measured strain. A 50mm diameter core is drilled on the structure up to 50mm depth and the strain perturbations around the core are measured to evaluate the existing stress. Laboratory studies were conducted to evaluate the reliability of this concrete core drilling technique. Calibration constants evaluated based on experiments are compared with the values evaluated using numerical analysis.en_US
dc.format.extentxxii, 170p.en_US
dc.languageEnglishen_US
dc.relation23en_US
dc.rightsuniversityen_US
dc.titleDevelopment of techniques for in-situ stress assessment in concrete structuresen_US
dc.creator.researcherParivallal Sen_US
dc.subject.keywordCivil engineeringen_US
dc.subject.keywordconcrete structuresen_US
dc.subject.keywordReinforced and prestressed concreteen_US
dc.description.noteReferences p. 167-168, List of Publications p. 169, Vitae p. 170en_US
dc.contributor.guideNagamani Ken_US
dc.contributor.guideRavisankar Ken_US
dc.publisher.placeChennaien_US
dc.publisher.universityAnna Universityen_US
dc.publisher.institutionFaculty of Civil Engineeringen_US
dc.date.registeredn.d.en_US
dc.date.completed01/12/2011en_US
dc.date.awardedn.d.en_US
dc.format.dimensions24cmen_US
dc.format.accompanyingmaterialNoneen_US
dc.source.universityUniversityen_US
dc.type.degreePh.D.en_US
Appears in Departments:Faculty of Civil Engineering

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01_title.pdfAttached File27.36 kBAdobe PDFView/Open
02_certificate.pdf207.35 kBAdobe PDFView/Open
03_abstract.pdf9.08 kBAdobe PDFView/Open
04_acknowledgement.pdf6.11 kBAdobe PDFView/Open
05_contents.pdf39.47 kBAdobe PDFView/Open
06_chapter 1.pdf14.01 kBAdobe PDFView/Open
07_chapter 2.pdf32.36 kBAdobe PDFView/Open
08_chapter 3.pdf7.29 MBAdobe PDFView/Open
09_chapter 4.pdf7.33 MBAdobe PDFView/Open
10_chapter 5.pdf4.49 MBAdobe PDFView/Open
11_chapter 6.pdf33.22 kBAdobe PDFView/Open
12_references.pdf9.72 kBAdobe PDFView/Open
13_publications.pdf5.78 kBAdobe PDFView/Open
14_vitae.pdf5.2 kBAdobe PDFView/Open


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