CLOSE OVERLAY

Beam End Repair for Prestressed Concrete Beams: Phase II

Project Details
STATUS

In-Progress

PROJECT NUMBER

22-788, TR-802

START DATE

03/01/22

END DATE

02/29/24

FOCUS AREAS

Infrastructure

RESEARCH CENTERS InTrans, BEC
SPONSORS

Iowa Department of Transportation
Iowa Highway Research Board

Researchers
Principal Investigator
Behrouz Shafei

Structural Engineer, BEC

Co-Principal Investigator
Brent Phares

Bridge Research Engineer

About the research

Prestressed concrete structures have become a popular choice for transportation infrastructure applications. According to the National Bridge Inventory, the percentage of bridges built with prestressed concrete technology has been rapidly increased from 15.0% to 23.5% over the past two decades. Specifically, precast prestressed concrete beams (PPCBs) are extensively used for bridge superstructures, owing to a number of favorable attributes, including great quality control on material and workmanship from one side, and fast, economic, and energy-efficient construction from the other side. The bridge superstructures are, however, known to be vulnerable to continuous deterioration. As a consequence, a problem commonly observed in the PPCB that supports the bridge superstructure is that the beam ends experience a faster (and more severe) deterioration compared to the rest of the beam. This is not surprising considering the fact that the beam end regions are subjected to a harsher exposure condition. To minimize serviceability issues and avoid catastrophic failures, effective maintenance and repair efforts are essential. The ultimate goal of this research project is, therefore, to develop feasible and cost-effective preservation strategies to extend the service life of the PPCB used in bridges in service.

TOP