Fatigue Testing of Wood-Concrete Composite Beams

Currently, wood-concrete composite structural members are usually applied in building structures. There are a relatively small number (in the low 100s) of known bridge applications involving wood-concrete composites. A problem with using these novel composite members in bridges with high traffic is that the fatigue behavior of the composite member under long-term repeated loading is not known. This report describes research performed in coordination with work at the University of Stuttgart, attempting to establish the S-N curve for fatigue loading of notched wood-concrete connections based on low/high-cycle, repeated loading tests. Experimental results are obtained on fourteen 1524 mm span composite beam specimens in which the wood and concrete are interconnected by embedded anchor screws at the notch locations. Five specimens are loaded statically while the others are cycled to failure with a maximum to minimum cyclic load ratio of 10. Points on the S-N curve are determined for three levels of the maximum load as a function of the average static failure load. Typical observed failure modes are block-shear of the wood at the notch and tension failure of the wood at mid-span. As a result, the obtained S-N curve could be proposed for future consideration in drafting design codes addressing the timber-concrete composite structures for bridges.

• Record URL:
  https://www.ugpti.org/resources/reports/details.php?id=743
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/23273
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Metropolitan State University of Denver

  Department of Engineering Technology, Campus Box 29, Room PL262
  P.O. Box 173362
  Denver, CO  United States  80217-3362

  Colorado State University, Fort Collins

  Department of Civil and Environmental Engineering
  Fort Collins, CO  United States  80525

  Mountain-Plains Consortium

  North Dakota State University
  Fargo, ND  United States  58108

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Balogh, Jeno
  • Atadero, Rebecca
• Publication Date: 2013-5

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 24p

Subject/Index Terms

• TRT Terms: Beams; Bridge design; Composite materials; Concrete; Failure analysis; Fatigue tests; Load tests; Timber; Wood
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 01482123
• Record Type: Publication
• Files: UTC, NTL, TRIS, RITA, ATRI, USDOT
• Created Date: May 23 2013 2:54PM