High skew link slab bridge system with deck sliding over backwall or backwall sliding over abutments : part I.

Details

• Creators:
  Aktan, Haluk ; Attanayake, Upul
• Corporate Creators:
  Western Michigan University. Dept. of Civil and Construction Engineering
• Corporate Contributors:
  Michigan. Dept. of Transportation. Construction and Technology Division
• Subject/TRT Terms:
  • Slabs
  • Floors
  • Structural members
  • Bridges
  • Concrete bridges
  • Testing
  • Abutments
  • Skew bridges
  • Concrete bridges--Floors--Testing
  • Concrete slabs--Testing
• Publication/ Report Number:
  Research Report RC-1563
• Resource Type:
  Tech Report
• Geographical Coverage:
  Michigan
• Edition:
  Final report; 2008-2011.
• Corporate Publisher:
  Michigan. Department of Transportation
• Abstract:
  A new bridge design and construction trend to help improve durability and rideability is to remove expansion ; joints over piers and abutments. One approach to achieve this is to make the deck continuous over the piers by ; means of a link slab while the girders remain simply supported. The need to implement link slabs is indicated ; by AASHTO LRFD section 2.5.2.4 which requires using a minimum number of expansion joints to improve ; rideability. Further, due to durability concerns associated with bridge deck joints, it is preferred to have a least ; number of joints or develop jointless decks. The expansion joints over the abutments can be removed by one of ; three methods: deck sliding over back wall, semi-integral abutments, and integral abutments. This results in ; expansion joints at either or both ends of the approaches. The design concerns other than link slab include ; backwall and wing-wall design and bearing movement. The behavior of a jointless bridge brings about many ; challenges to bridge designers. The complexity is augmented when skew is involved. ; This report complements an earlier report based on previous research on Combining Link Slab, Deck Sliding ; Over Backwall and Revising Bearings (Aktan et al., 2008) where the behavior of straight and moderately skew ; (skew < 200) link slab bridges were investigated and design recommendations were developed. This report ; describes the behavior and performance of high skew (skew > 200) jointless bridges with link slabs and two ; abutment configurations. These abutment configurations are deck sliding over backwall and backwall sliding ; over abutments (i.e. semi-integral abutments). ; Four tasks were performed in this project. The first task was to review and synthesize information related to the ; behavior, performance, design, and analysis of skew bridges. The second task was field assessment of skew ; bridge behavior under static truck loads and thermal loads. The third task was analytical and numerical analysis ; of skew link slabs. The final task was analytical and numerical analysis of skew sliding deck over backwall ; systems and semi-integral abutments. ; Design recommendations are developed based on literature, field assessment data analysis, finite element ; modeling, and subsequent simulations of the numerous models developed in this project. One recommendation ; deals with the skew link slab design and the remaining recommendations are for bearing selection and selection ; and design of a transverse restraint system at abutments of skew link slab bridges.
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• Format:
  PDF
• Funding:
  2006-0415
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24218/dot_24218_DS1.pdf
• File Type:
  [PDF - 3.38 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:336429ae678e34478f530603b244cd11ca07eadb22ca6510042231ba465a530ba7c7625823f705cb31340d48a960ab212a798e051d4dc19f83d854d9e5b1e321