I-girder with discrete torsional bracings

Lateral-torsional buckling and torsional vibration

C. T. Nguyen, Hak Eun Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Discrete torsional bracing systems are widely used in practice to increase the strength of Igirders bridges. This paper presents equations for lateral-torsional buckling strength, torsional natural frequency and stiffness requirements of I-girders with discrete torsional bracings. Firstly, the equations to calculate the critical moment of the I-girder with discrete torsional bracings are introduced. An equivalent moment factor C b in terms of the number of bracing points is proposed for I-girder subjected to linear moment gradient when full bracing is provided. The equations to calculate the torsional natural frequency are also presented in the same manner. The proposed equations are then compared with the results of finite element analyses and those from previous studies. From the results, it is found that proposed equations agree well with results of finite element analyses regardless of the number of bracing points. Finally, the reduced formula for the total torsional stiffness requirement is proposed for the design purpose.

Original languageEnglish
Title of host publicationBridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management
Pages2696-2701
Number of pages6
Publication statusPublished - 2010 Dec 1
Event5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010 - Philadelphia, PA, United States
Duration: 2010 Jul 112010 Jul 15

Other

Other5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010
CountryUnited States
CityPhiladelphia, PA
Period10/7/1110/7/15

Fingerprint

Buckling
Natural frequencies
Stiffness
Beams and girders

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Building and Construction
  • Architecture

Cite this

Nguyen, C. T., & Lee, H. E. (2010). I-girder with discrete torsional bracings: Lateral-torsional buckling and torsional vibration. In Bridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management (pp. 2696-2701)

I-girder with discrete torsional bracings : Lateral-torsional buckling and torsional vibration. / Nguyen, C. T.; Lee, Hak Eun.

Bridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management. 2010. p. 2696-2701.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nguyen, CT & Lee, HE 2010, I-girder with discrete torsional bracings: Lateral-torsional buckling and torsional vibration. in Bridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management. pp. 2696-2701, 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, United States, 10/7/11.
Nguyen CT, Lee HE. I-girder with discrete torsional bracings: Lateral-torsional buckling and torsional vibration. In Bridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management. 2010. p. 2696-2701
Nguyen, C. T. ; Lee, Hak Eun. / I-girder with discrete torsional bracings : Lateral-torsional buckling and torsional vibration. Bridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management. 2010. pp. 2696-2701
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