Masters Theses

Abstract

"Over the past two decades the load resistance factor design (LRFD) has been accepted by the American Association for Transportation and Highway Officials (AASHTO) for the design of bridges. This approach is now gaining widespread popularity in the United States for substructure bridge design, including the design of driven pile foundations, as the states calibrate the geotechnical resistance factors for local geological conditions and practices. This study presents the geotechnical resistance factors calibrated for axially driven pile using the first-order reliability method (FORM) for the target reliability index of 2.33 and 3.0 based on 64 end-of-drives (EOD) and 22 beginning-of restrike (BOR) pile driving analyzer (PDA) test data from nine bridge sites in Missouri. Three static pile capacity prediction methods were used, i.e. the Nordlund, Meyerhof and Beta methods. The work investigated the efficiency of each method based on the bias factor, the ratio of the measured to the predicted capacity of the pile, (λ = Rm/Rp), the coefficient of variation (COV), and efficiency factor or the ratio of the resistance factor to the bias factor, (Φ/λ). It verified that the Beta and Nordlund methods provide better predictions than the Meyerhof method. In addition, a comparison of the resistance factor in current AASHTO LRFD with the calibrated resistance factor shows that validating the resistance factors in the AASHTO may result in less reliable design. Finally, the recommended resistance factors for LRFD design are provided for use in Missouri. In addition, further refinement of the developed resistance factors is recommended to improve the resistance factors using large quantity and high quality of data that cover wide areas the glaciated plain and southeast lowland geological regions"--Abstract, page iii.

Advisor(s)

Luna, Ronaldo

Committee Member(s)

Ge, Yu-Ning (Louis)
Stephenson, Richard Wesley

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Sponsor(s)

Missouri. Department of Transportation

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2010

Pagination

ix, 135 pages

Note about bibliography

Includes bibliographical references (pages 131-134).

Geographic Coverage

Missouri

Rights

© 2010 Mulugeta Abay Kebede, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Bridges -- Foundations and piers -- Design and construction -- MissouriEarthwork -- Standards -- MissouriLoad factor design

Thesis Number

T 9617

Print OCLC #

680501597

Electronic OCLC #

911201386

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