Degree Type

Thesis

Date of Award

2000

Degree Name

Master of Science

Department

Civil, Construction, and Environmental Engineering

Major

Civil Engineering (Structural Engineering)

First Advisor

Lowell F. Greimann

Second Advisor

Robert E. Abendroth

Abstract

Integral-abutment bridges eliminate the expansion joints that are generally used to accommodate bridge length changes due to daily and annual temperature variations. Additional stresses and displacements due to the thermal loading are induced in these indeterminate structures that are not typically associated with bridge structures supported on pins and rollers. The goal of this research was to determine the effects of the thermal loading on two integral-abutment bridges. Extensive field monitoring was conducted on two, in-service, skewed, integral-abutment bridges located in central Iowa. The experimental program included long-term monitoring of longitudinal and transverse abutment displacements, relative displacements of the superstructure over the pier caps, strains in selected steel HP-shaped piles supporting the abutments, strains in several PC girders, bridge member temperatures, and end fixity of selected piles and girders in the abutments. The experimental temperature and displacement data was used to calibrate an ANSYS, finite-element model for each of the two monitored bridge structures. Experimental strains were verified and maximum strains due to the thermal loading were predicted for various members using the finite-element models.

DOI

https://doi.org/10.31274/rtd-180813-8053

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Brad Harold Sayers

Language

en

OCLC Number

(OCoLC)44791295

File Format

application/pdf

File Size

265 pages

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