ITTC Project

Torsion of Exterior Girders: Improved Design Aid

Project Award Date: 01-01-2000


The placement of concrete decks imposes loading onto exterior steel bridge girders. Kansas Department of Transportations (KDOT) bridge engineers must take this torsional loading into account when theyre reviewing the adequacy of construction support schemes. It is useful to have a computer design tool that aids bridge engineers in evaluating the torsional response in the form of: stresses and deflections of the girder flanges, forces in brackets and diaphragms, and the effect of tic rods and blocking provided as temporary support.

A previous K-TRAN Project, KU-96-3 Torsion of Exterior Girders of a Steel Girder Bridge during Concrete Deck Placement, developed a design aid called TAEG, Torsion Analysis of Exterior Girders. TAEG is a computer program for predicting the torsional response of fascia girders to concrete placement loads. This design aid shows promise for better addressing KDOTs need to quickly and accurately evaluate proposed construction schemes with respect to torsion of exterior girders during concrete deck placement. However, additional work is required to allow the full benefit of this design aid to be realized.

Results could be used immediately by the KDOT Bridge Design Department. The improved design aid would allow rapid and accurate evaluation of proposed construction bracing schemes. The reduction of torsional deflection would produce a deck of proper depth, concrete cover, and improved ride-ability. The proposed work has the potential to achieve better quality and less expensive design of highway bridges for Kansans.


Faculty Investigator(s): Kim Roddis (PI)

Project Sponsors

Primary Sponsor(s): Kansas Department of Transportation

Partner with ITTC

The Information and Telecommunication Technology Center at the University of Kansas has developed several assistance policies that enhance interactions between the Center and local, Kansas, or national companies. 

ITTC assistance includes initial free consulting (normally one to five hours). If additional support is needed, ITTC will offer one of the following approaches: 

Sponsored Research Agreement

Individuals and organizations can enter into agreements with KUCR/ITTC and provide funds for sponsored research to be performed at ITTC with the assistance of faculty, staff and students.

Licensing and Royalty/Equity Agreement

An ITTC goal is the development of investment-grade technologies for transfer to, and marketing by, local, Kansas, and national businesses. To enhance this process, the Center has developed flexible policies that allow for licensing, royalty, and equity arrangements to meet both the needs of ITTC and the company.

Commercialization Development

Companies with a technology need that can be satisfied with ITTC's resources can look to us for assistance. We can develop a relationship with interested partners that will provide for the development of a technology suited for commercialization.

ITTC Resource Access

ITTC resources, including computers and software systems, may be made available to Kansas companies in accordance with the Center's mission and applicable Regents and University policies.

ITTC Calendar
There are no upcoming events at this time.