Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration

Bibliographic Details
Main Author:	Lab, Scott
Language:	English
Published:	University of Cincinnati / OhioLINK 2010
Subjects:	Civil Engineering destructive testing deteriorated prestressed box beam bridge
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=ucin1275657735

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-ucin12756577352021-08-03T06:13:52Z Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration Lab, Scott Civil Engineering destructive testing deteriorated prestressed box beam bridge <p>Four adjacent prestressed concrete box beams were removed from a decommissioned bridge and tested to destruction. The beams were 36 inches wide by 17 inches deep and had a span length of 37 feet 6 inches. Each beam contained fourteen, 1/2 inch diameter, stress relieved prestressed strands. All of the prestressed strands were arranged in one layer, which was located below the stirrups. One beam was in good condition, with the only visible deterioration being longitudinal cracking. One beam had three corroded prestressed strands visible and a large spalled segment which, when removed, exposed two additional prestressed strands. The remaining two beams were badly deteriorated, with spalled concrete exposing seven corroded prestressed strands.</p><p>The provisions of the AASHTO LRFD Bridge Design Specifications, the AASHTO Standard Specifications, and the PCI Design Handbook were used to evaluate the loss of prestressing force. The measured prestressing force loss was closest to the AASHTO LRFD Bridge Design Specifications, but all three methods provided conservative estimates of prestressing force loss.</p><p>The bridge had been designed using the AASHTO Standard Specifications. The provisions of the Standard Specifications were conservative in determining the ultimate loading for the undeteriorated beam. The provisions of the Standard Specifications were also conservative in determining the ultimate load for the deteriorated beam if the deteriorated strands were assumed ineffective. The deteriorated concrete box beams were all ductile and had final deflections exceeding L/50.</p><p>The original bridge was rated using the test results. When following the provisions of the AASHTO Standard Specifications, the designed service loading for the bridge would have exceeded the ultimate loading of one deteriorated middle span beam. A failure of this beam would not have caused a progressive failure of the middle span under service loadings. Following the Load Factor Rating method for the middle span beams, the loadings exceeded the strength of the members. Therefore, load restrictions would have been required for the bridge had it not been decommissioned.</p> 2010-08-05 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1275657735 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1275657735 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Civil Engineering destructive testing deteriorated prestressed box beam bridge
spellingShingle	Civil Engineering destructive testing deteriorated prestressed box beam bridge Lab, Scott Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration
author	Lab, Scott
author_facet	Lab, Scott
author_sort	Lab, Scott
title	Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration
title_short	Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration
title_full	Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration
title_fullStr	Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration
title_full_unstemmed	Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration
title_sort	structural evaluation of lic-310-0396 box beams with advanced strand deterioration
publisher	University of Cincinnati / OhioLINK
publishDate	2010
url	http://rave.ohiolink.edu/etdc/view?acc_num=ucin1275657735
work_keys_str_mv	AT labscott structuralevaluationoflic3100396boxbeamswithadvancedstranddeterioration
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Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration

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