Time-dependent deformations and stresses in prestressed concrete structures

Simple item page
dc.contributor.advisorGhali, Amin
dc.contributor.authorTadros, Maher K. (Maher Khalil)
dc.date.accessioned2005-07-19T21:45:22Z
dc.date.available2005-07-19T21:45:22Z
dc.date.issued1975
dc.descriptionBibliography: p. 119-125.en
dc.description.abstractThe objective of this investigation is to develop an accurate method for the evaluation of the time- dependent effects of creep and shrinkage of concrete and relaxation of steel in prestressed concrete beams and frames. The analysis uses a step-by-step numerical procedure in which the service life of the structure is divided into discrete time intervals. In each interval the time-dependent effects on stresses and strains in the preceding intervals are accounted for, thus updating the data at each step. The step-by-step procedure gives accurate results but is unsuitable for hand computation common in many applications. The thesis is divided into two main parts. The first one deals with noncomposite statically determinate members. A simple, but accurate, design method is developed for the evaluation of axial strain, curvature and prestress loss using a chart derived by a step-by-step procedure. When the first two are calculated for various sections in the member, they can be used to find displacements. ing and midspan deflection in beams. with other available methods. Formulae are given for axial shorten- The proposed method is compared In the second part, a general analysis is developed for the solution of composite continuous structures. A computer program is presented for use as a design aid. It can be used, among other applications, to determine t he time-dependent effects in bridges made up of precast pretensioned members placed freely on supports (or falsework) and then made continuous by cast-in-situ deck and second stage post-tensioning. The analysis gives the time development, of the stresses in concrete and steel, and of the displacements (translations and rotations), at various locations along the centroidal axis of the structure. The proposed design procedures are verified by comparison with experimental results in the literature, and demonstrated by numerical examples.
dc.format.extentxvi, 165 leaves : ill. ; 30 cm.en
dc.identifier82480945en
dc.identifier.citationTadros, M. K. (1975). Time-dependent deformations and stresses in prestressed concrete structures (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/15899en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/15899
dc.identifier.lccTA 683.9 T33 1975 Microficheen
dc.identifier.other82480945en
dc.identifier.urihttp://hdl.handle.net/1880/15251
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject.lccTA 683.9 T33 1975 Microficheen
dc.subject.lcshPrestressed concrete construction
dc.subject.lcshStrains and stresses
dc.titleTime-dependent deformations and stresses in prestressed concrete structures
dc.typedoctoral thesis
thesis.degree.disciplineCivil Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopyTRUE
ucalgary.thesis.accessionTheses Collection 58.002:Box 245 82480945
ucalgary.thesis.notesPLen
ucalgary.thesis.uarcreleasenoen
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_Tadros_1975.pdf
Size:
48.31 MB
Format:
Adobe Portable Document Format
Description:
Thesis
Download
Collections
Legacy Theses