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contributor authorM. Saiidi
contributor authorE. Hutchens
contributor authorD. Gardella
date accessioned2017-05-08T21:24:41Z
date available2017-05-08T21:24:41Z
date copyrightAugust 1998
date issued1998
identifier other%28asce%291084-0702%281998%293%3A3%28111%29.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/50400
description abstractA posttensioned, simply supported, box-girder bridge in southern Nevada was instrumented during construction beginning in June 1992. The study was triggered by concerns over the potential adverse effects of low relative humidity on prestress losses. The variation of prestress forces and deflection was monitored over a 24-month period. These measured data were compared with four loss prediction models: (1) American Association of State Highway Transportation Officials (AASHTO) specifications; (2) American Concrete Institute (ACI) Committee 209; (3) Prestressed Concrete Institute (PCI) Committee report; and (4) Naaman's time-step method. The measured data showed that the actual creep and shrinkage losses were less than those predicated by AASHTO by approximately 30%. Of the three time-step methods, namely, the ACI 209, Naaman, and the PCI Committee methods, the first two yielded creep and shrinkage losses that closely matched the measured data, whereas the PCI method underestimated the losses by 15%.
publisherAmerican Society of Civil Engineers
titleBridge Prestress Losses in Dry Climate
typeJournal Paper
journal volume3
journal issue3
journal titleJournal of Bridge Engineering
identifier doi10.1061/(ASCE)1084-0702(1998)3:3(111)
treeJournal of Bridge Engineering:;1998:;Volume ( 003 ):;issue: 003
contenttypeFulltext


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