dc.contributor.author |
Ismail, Najif |
en |
dc.contributor.author |
Ingham, Jason |
en |
dc.date.accessioned |
2014-01-20T23:37:29Z |
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dc.date.issued |
2013-06 |
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dc.identifier.citation |
Journal of Materials in Civil Engineering 25(6):718-725 Jun 2013 |
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dc.identifier.issn |
0899-1561 |
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dc.identifier.uri |
http://hdl.handle.net/2292/21444 |
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dc.description.abstract |
Time-dependent prestress losses in historic unreinforced clay brick masonry (URM) walls strengthened using unbonded posttensioning were investigated, with a particular emphasis on masonry shortening resulting from creep and shrinkage. An experimental program was undertaken that involved continuous monitoring of masonry shortening occurring in prestressed URM wallettes over a period of 180 days. The test wallettes were extracted from a real historic URM building and were subjected to varying magnitudes of prestress, representing axial stresses that would be developed at the wall base when strengthened using unbonded posttensioning. A rheological model is proposed for predicting masonry creep shortening, which can subsequently be used to predict posttensioning losses. It was established that a prestress loss of up to 16.4% for normal threaded steel bars and up to 5.4% for sheathed greased seven wire strands can be expected in posttensioned historic URM walls when the tendons are posttensioned to a stress of 0.5 ƒpu. |
en |
dc.language |
English |
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dc.publisher |
American Society of Civil Engineers |
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dc.relation.ispartofseries |
Journal of Materials in Civil Engineering |
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dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.asce.org/Audience/Authors,--Editors/Journals/Journal-Policies/Posting-Papers-on-the-Internet/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
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dc.subject |
Science & Technology |
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dc.subject |
Technology |
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dc.subject |
Construction & Building Technology |
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dc.subject |
Engineering, Civil |
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dc.subject |
Materials Science, Multidisciplinary |
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dc.subject |
Engineering |
en |
dc.subject |
Materials Science |
en |
dc.subject |
Time-dependent losses |
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dc.subject |
Masonry |
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dc.subject |
Seismic strengthening |
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dc.subject |
Masonry creep |
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dc.subject |
Masonry shrinkage |
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dc.subject |
Posttensioning |
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dc.subject |
CREEP |
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dc.subject |
CONCRETE |
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dc.title |
Time-Dependent Prestress Losses in Historic Clay Brick Masonry Walls Seismically Strengthened Using Unbonded Posttensioning |
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dc.type |
Journal Article |
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dc.identifier.doi |
10.1061/(ASCE)MT.1943-5533.0000541 |
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pubs.issue |
6 |
en |
pubs.begin-page |
718 |
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pubs.volume |
25 |
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dc.description.version |
AM - Accepted Manuscript |
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pubs.end-page |
725 |
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pubs.publication-status |
Published |
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dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
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pubs.subtype |
Article |
en |
pubs.elements-id |
381139 |
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pubs.org-id |
Engineering |
en |
pubs.org-id |
Civil and Environmental Eng |
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dc.identifier.eissn |
1943-5533 |
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pubs.record-created-at-source-date |
2014-01-21 |
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