CTRE is an Iowa State University center, administered by the Institute for Transportation.

Address: 2711 S. Loop Drive, Suite 4700, Ames, IA 50010-8664

Phone: 515-294-8103
FAX: 515-294-0467

Website: www.ctre.iastate.edu/

Iowa State University--Becoming the Best

Evaluation of the Need for Longitudinal Median Joints in Bridge Decks on Dual Structures

Image: Underside view of longitudinal median joints in bridge deck

Longitudinal median joints under bridge deck

Image: Diagonal cracks at the corner of a bridge deck

Diagonal cracks at the corner of a bridge deck

Researcher(s)

Principal investigators:

Project status

Completed

Start date: 05/01/13
End date: 09/30/15

Publications

Report: Evaluation of the Need for Longitudinal Median Joints in Bridge Decks on Dual Structures (10.26 mb pdf) September 2015

Tech transfer summary: Evaluation of the Need for Longitudinal Median Joints in Bridge Decks on Dual Structures (290.97 kb pdf) Sep 2015

Sponsor(s)/partner(s)

Sponsor(s):

About the research

Abstract:

The primary objective of this project was to determine the effect of bridge width on deck cracking in bridges. Other parameters, such as bridge skew, girder spacing and type, abutment type, pier type, and number of bridge spans, were also studied. To achieve the above objectives, one bridge was selected for live-load and long-term testing. The data obtained from both field tests were used to calibrate a three-dimensional (3D) finite element model (FEM). Three different types of loading—live loading, thermal loading, and shrinkage loading—were applied. The predicted crack pattern from the FEM was compared to the crack pattern from bridge inspection results. A parametric study was conducted using the calibrated FEM.

The general conclusions/recommendations areas follows: