A New Pile-Deck Connection for Seismic Performance Enhancement of Marginal Wharves

Pile-supported marginal wharves are a critical component of port infrastructure. A primary region of post-earthquake structural damage is the connection between the pile and the wharf deck. Review of prior experimental studies into state-of-the-practice connections indicates these can sustain cyclic deformation demand but at the cost of deterioration in resistance and significant damage. Damage within the connection is difficult to access and its repair is costly. Therefore, there is an interest in reducing the damage under moderate levels of seismic demand while sustaining the capacity under large cyclic drifts. An experimental study was undertaken to investigate mechanisms to limit damage while maximizing strength and deformation capacities of precast piles and their connections. Several structural concepts were investigated including (1) intentional debonding of the headed reinforcing bars, (2) supplemental rotation capacity through the addition of a cotton duck bearing pad above the head of the precast pile and (3) supplemental material to sustain the lateral deformations while minimizing deck damage. The final design incorporated all of these concepts. The results show significantly reduced damage. A design method is proposed to facilitate adoption of the proposed connection design in structural engineering practice. A comparison with other connection designs is made via fragility functions to assess their seismic performance.

• Availability:
  • Find a library where document is available. Order URL: http://www.concrete.org/BookstoreNet/ProductDetail.aspx?itemid=SP295CD
• Supplemental Notes:
  • Abstract reprinted with permission from the American Concrete Institute
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Lehman, Dawn
  • Roeder, Charles
• Conference:
  • ACI Convention, Spring 2013
  • Location: Minneapolis MN
  • Date: 2013-4-14 to 2013-4-18
• Publication Date: 2013

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: pp 83-104
• Monograph Title: Recent Advances in the Design of Prestressed Concrete Piles in Marine Structures in Seismic Regions

Subject/Index Terms

• TRT Terms: Deformation; Design practices; Deterioration; Earthquake resistant design; Performance; Ports; Precast concrete; Support piles; Wharves
• Subject Areas: Bridges and other structures; Design; Marine Transportation; Materials; I32: Concrete;

Filing Info

• Accession Number: 01502155
• Record Type: Publication
• ISBN: 9780870318450
• Files: TRIS
• Created Date: Dec 23 2013 10:38AM