Field evaluation of hybrid‐composite girder bridges in Missouri.

Details

• Creators:
  Myers, John J. ; Aboelseoud, Mohamed A. ; Earley, C. Renee ; Washer, Glenn ; Schmidt, Justin
• Corporate Creators:
  Missouri University of Science and Technology
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Girder bridges
  • Fiber composites
  • Self compacting concrete
  • Field tests
  • Air voids
  • Infrared imagery
  • Load tests
  • Finite element method
  • Durability
  • Shear strength
  More +
• Publication/ Report Number:
  cmr 15-002
• Resource Type:
  Tech Report
• Geographical Coverage:
  Missouri
• Corporate Publisher:
  Missouri. Dept. of Transportation. Organizational Results
• Abstract:
  Three hybrid composite beam (HCB) bridges were recently constructed in Missouri, USA. HCB is an innovative idea ; that incorporates traditional construction materials (steel and concrete) with fiber reinforced polymer (FRP) composites ; in such a manner to optimize the performance of the beam constituents. The HCB consists of self-consolidating concrete ; (SCC) poured in classical arch shape and tied at the ends by conventional prestressing strands. The concrete and steel are ; tucked inside durable fiberglass shell and the voids are filled with polyiso foam. An integrated study was implemented ; on the three bridges to investigate the HCB in-service behavior. The study included quality control / quality assurance ; (QC/QA) testing program. As a part of this research study, an innovative infrared (IR) thermal imaging approach was ; developed to detect the voids in the concrete arch section during its casting. The approach is found to be an ideal ; solution for QC/QA of the concrete arch concrete placement. A series of load tests on the bridges together with ; meticulous theoretical and numerical analyses were executed. The first finite element analysis (FEA) for a HCB bridge ; superstructure was accomplished. The analysis was used to provide better understanding for the girder behavior and to ; emphasize the areas that need more examination. Based on the FEA results the existing flexural design methodology and ; assumptions were tested. The methodology was found unable to detect the maximum compressive stress in the concrete ; arch, and the strain compatibility assumption was found invalid. However, the experimental measurements along with ; the mathematical calculations indicate that the HCB owns abundant nominal bending and shear strength to withstand the ; expected loads during its lifetime. A modified methodology that is based on the same assumptions as the existing one ; was produced. The methodology was found to achieve significant enhancement in predicting the stresses under the ; service loads. The durability of the HCB was tested through subjecting the composite shell to different aging regimes. ; The testing results indicate that the HCB possesses excellent durability in relation to the expected weathering exposure ; in Missouri. Longer exposure regimes are under implementation to assure these results.
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• Format:
  PDF
• Funding:
  TRyy1124
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28293/dot_28293_DS1.pdf
• File Type:
  [PDF - 10.58 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0989993942706e67b420504fc4cd7e626b3e8c9a33f7d4985b490427bf9b392730ac3c2d21a871a9e336595f808d23ab39eb005fb9172127bd66a6b38fc53c44