Seismic CFST Column-to-Precast Cap Beam Connections for Accelerated Bridge Construction

Concrete-filled steel tubes (CFSTs) frequently are a more efficient and economical structural solution then conventional reinforced concrete and structural steel. For the same size member, CFSTs offer increased strength and stiffness as well as accelerated construction. CFSTs may be used for bridge columns that will yield under earthquake loading, but this requires robust connections capable of sustaining large cyclic loads. To facilitate accelerated bridge construction, precast cap beams and girders are commonly used. Although CFST column-to-foundation connections have been studied, CFST column-to-precast cap beam connections have not. This is the focus of this research study. In contrast to cast-in-place (CIP) components, precast pier cap connections require additional design considerations including construction methodology and limits on geometry. To investigate this connection an integrated analytical and experimental research program was performed. Initially, continuum finite-element methods were used to conduct a parametric study; the results from that study determined the values of the study parameters and selection of the experimental specimens. Three different connection types were studied: (1) an embedded ring CFST, (2) a welded dowel, and (3) an interior reinforced concrete connection. Large-scale, pseudostatic tests were conducted. Results from the experimental investigation showed that the three connection types provide excellent deformability under reversed-cyclic loading and minimized damage in the cap beam.

• Record URL:
  https://doi.org/10.1061/(ASCE)ST.1943-541X.0001505
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339445
• Supplemental Notes:
  • © 2016 American Society of Civil Engineers.
• Authors:
  • Stephens, Max T
  • Berg, Lisa M
  • Lehman, Dawn E
  • Roeder, Charles W
• Publication Date: 2016-9

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04016049
• Serial:
  • Journal of Structural Engineering
  • Volume: 142
  • Issue Number: 9
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9445
  • Serial URL: http://ascelibrary.org/loi/jsendh

Subject/Index Terms

• TRT Terms: Beams; Bridge construction; Columns; Earthquake resistant design; Precast concrete
• Uncontrolled Terms: Concrete filled steel tubes
• Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

• Accession Number: 01596884
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Mar 23 2016 3:13PM