Repository logo
 

Multi-criteria reliability-based optimization for evaluation and rehabilitation of concrete bridge structures

Simple item page
dc.contributor.authorBuddhawanna, Saharat, author
dc.contributor.authorVan de Lindt, John W., advisor
dc.date.accessioned2024-03-13T18:50:53Z
dc.date.available2024-03-13T18:50:53Z
dc.date.issued2008
dc.description.abstractThe American Society of Civil Engineers (ASCE) reported that approximately one-third of U.S. bridges are either in need of serious repair or functionally obsolete. Even as repairs are completed, the problem persists with more and more bridges being added to the list each year. In order to determine if repair is needed for a specific bridge, a condition evaluation is typically conducted. The selection of conditional evaluation method and the subsequent repair method has, to date, been based on the preference of the engineer and/or contractor and at times the equipment available.
dc.description.abstractThe work presented in this dissertation represents a first effort to provide quantitative decision support for selection of the most economical evaluation and repair method. The two most commonly used condition evaluation techniques are non-destructive evaluation (NDE) and what is termed herein as semi-destructive evaluation (SDE). There are several repair and rehabilitation strategies readily available for bridge girders such as increasing the structural cross-section (CI), attaching steel plates (SP), external bonded fiber reinforced polymer (FRP), or external prestressing (EP). The procedure presented herein used these above techniques for illustration and combines elements of structural reliability theory, optimization, and structural analysis. Included is the optimization (minimization) of a cost function which accounts for the approximate level of damage present in the structure, a decision diagram to ultimately select the method based on the lowest expected cost, and preference factors in the decision procedure that account for the availability of material, labor, and equipment.
dc.description.abstractThree illustrative examples for prestressed concrete bridge girders are presented. It is envisioned that, while the procedure still relies on some basic assumptions, it can be used eventually to develop a basic set of rules for the most common combinations of bridges and sites.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.identifierETDF_Buddhawanna_2008_3332722.pdf
dc.identifier.urihttps://hdl.handle.net/10217/237606
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.rights.licensePer the terms of a contractual agreement, all use of this item is limited to the non-commercial use of Colorado State University and its authorized users.
dc.subjectconcrete bridges
dc.subjectnondestructive evaluation
dc.subjectstructural repairs
dc.subjectcivil engineering
dc.titleMulti-criteria reliability-based optimization for evaluation and rehabilitation of concrete bridge structures
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineCivil and Environmental Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (Ph.D.)

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
ETDF_Buddhawanna_2008_3332722.pdf
Size:
1.96 MB
Format:
Adobe Portable Document Format
Download

Collections

2000-2019
Theses and Dissertations