Performance of fire-damaged prestressed concrete bridges

Author

Wendy LeAnn Moore

Keywords and Phrases

Pullout test

Abstract

"The purpose of this experimental program was to develop and analyze the effects of fire damage on prestressed concrete bridges. Flexural strength and serviceability of the bridge were measured by inputting fire damaged data into a parametric study spreadsheet consisting of a typical 3-span continuous prestressed concrete bridge. Data was obtained by exposing two types of specimens to different levels of elevated temperatures and then cooling them at room temperature to simulate fire damage. The two specimen types were prestressing strands which were tested in tension and concrete blocks with a single prestressing strand embedded in the center, which were tested in pullout testing. The tension specimens provided information regarding the tensile strength and stiffness of the prestressing strand steel and the pullout testing gave an understanding regarding the bond properties. Material specific results found that prestressing steel loses significant tensile strength upon exposure to temperatures greater than 500°F (260°C). The bond between the strands and concrete is affected almost immediately with considerable loss occurring at 500°F (260°C). For this bridge design it was found that depending on the location and burning duration of the fire, the structure can survive without losing significant capacity. This applies to both standard time-temperature curve fires and hydrocarbon fuel fires"--Abstract, page iii.

Advisor(s)

Myers, John

Committee Member(s)

Rogers, J. David
Ge, Yu-Ning (Louis)

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Comments

Appendix included as 690 pages at end of thesis.

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2008

Pagination

xviii, 139 pages, plates

Rights

© 2008 Wendy LeAnn Moore, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Concrete -- Fire testingPrestressed concrete bridges -- Effect of temperature on

Thesis Number

T 9438

Print OCLC #

371197607

Electronic OCLC #

373874045

Recommended Citation

Moore, Wendy LeAnn, "Performance of fire-damaged prestressed concrete bridges" (2008). Masters Theses. 6778.
https://scholarsmine.mst.edu/masters_theses/6778