Details

STRUCTURAL INVESTIGATION OF A FIBER REINFORCED PRECAST CONCRETE BOX CULVERT

by SCHWARTZ, CHRIS J.

Abstract (Summary)
This investigation of a pre-cast concrete box culvert was undertaken to determine the suitability of replacing conventional reinforcing steel with a fiber reinforced concrete. It can be predicted that fiber reinforced concrete will provide the culvert with a strength and durability that are equivalent to or exceed those provided by the culvert reinforced with conventional reinforcing steel. The use of the fiber reinforcement would result in a significant reduction in the labor costs when compared to the fabrication of a pre-cast concrete culvert unit reinforced with conventional reinforcing steel. LJB Inc., in conjunction with the University of Cincinnati, has performed a full scale load test of a 12 foot span, 6 foot tall pre-cast box culvert reinforced with monofilament polypropylene fibers. The objective was to assess the behavior of the fiber reinforced culvert, both experimentally and analytically, and to determine the feasibility of using the fiber reinforced culvert in place of the commonly used standard reinforced unit. During construction of the bridge, the fiber reinforced culvert was load tested utilizing a load actuator mounted on top. Strains and deflections were recorded using instruments mounted at strategic locations. Recorded strains and deflections were compared to theoretical values obtained from three finite element models. The results of this investigation generated positive results. However, due to the presence of a crack that had developed near the mid-span of the culvert prior to load testing, further testing is suggested. Even with this crack, the results suggest the future success of the use of fibers to replace conventional reinforcing steel.
Bibliographical Information:

Advisor:

School:University of Cincinnati

School Location:USA - Ohio

Source Type:Master's Thesis

Keywords:fiber reinforced concrete precast box culvert conspan polypropylene monofilament fibers

ISBN:

Date of Publication:01/01/2005

© 2009 OpenThesis.org. All Rights Reserved.