Off-campus WSU users: To download campus access dissertations, please use the following link to log into our proxy server with your WSU access ID and password, then click the "Off-campus Download" button below.

Non-WSU users: Please talk to your librarian about requesting this thesis through interlibrary loan.

Access Type

WSU Access

Date of Award

January 2020

Degree Type


Degree Name



Civil and Environmental Engineering

First Advisor

Fatmir Menkulasi



This study deals with the flexural behavior of all UHPC and composite UHPC beams prestressed with bonded tendons. Flexural behavior is investigated numerically in terms of the failure mode for each beam type and in terms of the mobilization of material capacity . Stress in pre-stressing strands at the ultimate limit state is predicted using finite element analysis, strain compatibility, as well as closed form equations. It is investigated whether the strain compatibility approach and proposed closed form equations are able to predict with good accuracy the stress in strands at the ultimate limit state. It is determined whether the behavior of a composite bridge constructed with prestressed UHPC beams and a normal strength concrete deck is comparable to that when both the beam and the deck are constructed with UHPC. Various concrete strengths for the deck are investigated to yield a comparable performance with all UHPC construction to result in an economical solution without compromising capacity. For cases that feature all UHPC construction (i.e. the beam and the deck) the mobilization of the material strength at the ultimate limit state is investigated. Failure mode for each case is characterized either as a concrete compression controlled failure, or a concrete tension controlled failure using validated material constitutive models. A proposed design methodology for determining flexural capacity at the ultimate limit state is presented. The proposed methodology is validated using data obtained from over 150 girder sections investigated numerically using validated finite element models, and strain compatibility analysis. The benefits of composite construction featuring a normal weight concrete deck and a UHPC beam are demonstrated by conducting a parametric analysis and monitoring the flexural failure mode and the utilization of material capacity.

Off-campus Download