Steel Bridge Design Handbook Design Example 4: Three-Span Continuous Straight Composite Steel Tub Girder Bridge

Tub girders are often selected over I-girders because of their pleasing appearance offering a smooth, uninterrupted, cross section. Bracing, web stiffeners, utilities, and other structural and nonstructural components are typically hidden from view within the steel tub girder, resulting in the tub girder’s clean appearance. Additionally, steel tub girder bridges offer advantages over other superstructure types in terms of span range, stiffness, durability, and future maintenance. This design example demonstrates the design of a tangent three-span continuous composite tub girder bridge with a span arrangement of 187.5 ft - 275.0 ft - 187.5 ft. This example illustrates the flexural design of a section in positive flexure, the flexural design of a section in negative flexure, the shear design of the web, the evaluation of using a stiffened versus an unstiffened bottom flange in the negative flexure region, as well as discussions related to top flange lateral bracing and bearing design.

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• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/42899
• Corporate Authors:

  HDR, Incorporated

  Pittsburgh, PA  United States 

  Federal Highway Administration

  Office of Bridges and Structures
  1200 New Jersey Avenue, SE
  Washington, DC  United States 
• Authors:
  • Chavel, Brandon
  • Carnahan, James
• Publication Date: 2015-12

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; References; Tables;
• Pagination: 106p

Subject/Index Terms

• TRT Terms: Bridge design; Composite structures; Continuous girder bridges; Flexural strength; Girders; Handbooks; Steel bridges
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 01608605
• Record Type: Publication
• Report/Paper Numbers: FHWA-HIF-16-002 - Vol. 24
• Contract Numbers: DTFH6114D00049
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: Aug 29 2016 11:10AM