Description
TitleReliability-based serviceability limit states for concrete girder bridges
Date Created2013
Other Date2013-10 (degree)
Extentxxxiv, 379 p. : ill.
DescriptionAlthough ultimate limit state, such as flexural capacity, shear, or stability, governs the overall safety of the structure, the accumulated damage due to cracking, excessive deflections, and vibrations also would lead to limitation of structural performance, abbreviation of service life, as well as extensive maintenance cost. Regarding the bridge structure, current AASHTO LRFD Bridge Design Specification (LRFD) was developed based on structural reliability approach and provided a uniform reliability at strength limit state. However, only strength limit states were considered and calibrated during the development and calibration of LRFD. Unlike strength limit state, exceedance of serviceability limit state in bridge structures might not result in catastrophic consequences directly. However, Serviceability limit states related to stress, deformation, and cracks under regular service conditions are essential to the performance, human experience, and durability of structure. To ensure consistent and rational reliability level to be achieved for all limit states, rational serviceability limit states need to be developed and investigated for bridge structures. In this study, various serviceability limit states were developed and investigated, including Service I limit state for crack control of reinforced concrete decks and Service III limit state for tension in prestressed concrete superstructures. The resistances of various serviceability limit states were derived and the statistical models were developed based on statistics of various random variables and using different methods including Monte Carlo simulation method. The live load model was developed based on national as well as local Weigh-in-Motion (WIM) data using various extrapolation techniques. Based on current practice, consequence of failure, and experience from previous research, target reliability indices were proposed for each serviceability limit state. Moreover, the reliability analysis was performed for various serviceability limit states and new design criteria were proposed to achieve the target reliability levels consistently for various design scenarios. In addition, the deterioration of structural resistance was investigated and the reliability level of various serviceability limit states with and without consideration of deterioration was compared.
NotePh.D.
NoteIncludes bibliographical references
Noteby Dan Su
Genretheses, ETD doctoral
Languageeng
CollectionGraduate School - New Brunswick Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.