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:
  Air Voids Durability Fiber Composites Field Tests Finite Element Method Girder Bridges Infrared Imagery Load Tests Quality Assurance Quality Control Self Compacting Concrete Shear Strength Stresses

  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.
  
  
• Format:
  PDF
• Funding:
  TRyy1124
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0989993942706e67b420504fc4cd7e626b3e8c9a33f7d4985b490427bf9b392730ac3c2d21a871a9e336595f808d23ab39eb005fb9172127bd66a6b38fc53c44
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28293/dot_28293_DS1.pdf
• File Type:
  [PDF - 10.58 MB ]