Seismic Behavior and Design of Segmental Precast Post-Tensioned Concrete Piers

Segmental precast column construction is an economic environmental friendly solution to accelerate bridge construction in the United States. Also, concrete-filled fiber reinforced polymer tubes (CFFT) represents a potential economic solution for durability issues in the bridge industry. Combining the segmental precast and CFFT will result in a rapid durable construction system. The proposed research will build on recent work by the principal investigator (PI), where he experimentally investigated the seismic behavior of tens single-column and two-column bents constructed using precast post-tensioned CFFT. The columns were constructed by stacking precast CFFT segments one on top of the other and then post-tensioned using unbonded tendons. Two specimens had external energy dissipation devices and another two specimens had neoprene in the joints between the CFFT segments. The neoprene significantly reduced the seismic displacement demand. The columns re-centered upon the conclusion of the test resulting in minimal residual displacement, which represents, in the case of a real strong earthquake, a huge advantage since the post-earthquake repair measures will be minimal. 3-D finite element models were developed by the PI to predict the performance of the single-column under monotonic lateral loads. The main objective of this proposal is to improve and expand the capabilities of these finite element models to produce design recommendations. In particular, the models will be expanded to include dynamic loading, two-column bents, and the neoprene in the joints. Including dynamic loading in the model is essential to quantify the energy dissipation due to rocking of the columns segments. The output of this research will be recommendations on the optimum construction characteristics of the system including the segment height/column diameter ratio, neoprene thickness and hardness, external energy dissipater requirements, and post-tensioning force level. The proposed research will develop a durable environmental friendly rapid construction bridge system, which has low life-cycle costs, construction waste, noise, traffic disruption, and initial construction cost. In addition, the developed system will has high work zone safety, efficient use of construction material, a short construction time, and improved constructability. The proposed construction system will not have a leakage of wet concrete into waterways leading to pollution of water and harm migrating fish. Finally, when the proposed construction system is fully developed and implemented in construction, it will reduce the expense of bridge replacement, repair, and continuous operation interruption after earthquakes.

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/25127
• Supplemental Notes:
  • This report was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Transportation Northwest Regional Center X (TransNow)

  University of Washington, More Hall, P.O. Box 352700
  Seattle, WA  United States  98195-2700

  Washington State Department of Transportation

  310 Maple Park Avenue, SE, P.O. Box 47300
  Olympia, WA  United States  98504

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Dawood, Haitham
  • ElGawady, Mohamed
  • Cofer, William
• Publication Date: 2011-6

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Illustrations; Photos; References; Tables;
• Pagination: 142p

Subject/Index Terms

• TRT Terms: Bridge construction; Bridge design; Bridge piers; Dislocation (Geology); Earthquakes; Fiber reinforced polymers; Finite element method; Precast concrete
• Uncontrolled Terms: Segmental columns; Three-dimensional models
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01447865
• Record Type: Publication
• Report/Paper Numbers: TNW2011-17, Research Project Agreement No. 64-8532
• Contract Numbers: DTRT07‐G‐0010
• Files: UTC, NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Oct 1 2012 10:38AM