Prefabricated Bridge Columns with Self-Centering Capability Using Shape Memory Alloy (SMA) And Ultra-High Performance Concrete (UHPC) In Plastic Regions

This research proposal introduces a new column-bent cap connection, with innovative materials such as Ultra-High Performance Concrete (UHPC), Shape Memory Alloy (SMA) and Engineered Cementitious Composite (ECC) to promote the self-centering behavior and post earthquake functionality of bridges subjected to earthquake ground motions. Circular columns will be considered in this study. The significance of this research is to propose a simple yet practical and effective use of innovative materials such as UHPC, SMA and ECC as substructure connection for bridges in medium and high seismic regions. Several factors are simplified in the construction of the column due to novel properties of UHPC and SMA to minimize the splice length between column longitudinal reinforcement. This phase of study will focus on comprehending on fundamental behavior of the proposed system and identify, possible future steps that are needed for implementation of the idea in the field. Research builds on previous work conducted at FIU (Azizinamini, et al) in the form of moving the plastic hinge outside of capacity protected areas in seismic design process, through use of UHPC. The research will involve experimental studies, in the form of 2/3 scaled column specimens subjected to constant axial load and cyclic lateral loads, small scale component tests to comprehend the behavior of SMA and durability aspects of the proposed system. The research is expected to develop a roadmap to implement the proposed idea in the field as well as tentative seismic design methodology that can be applied to bridge column-cap beam connections, column-footing connections, and plastic hinge zones.

Language

• English

Project

• Status: Active
• Funding: $105000
• Sponsor Organizations:

  Accelerated Bridge Construction University Transportation Center (ABC-UTC)

  Florida International University
  10555 W. Flagler Street
  Miami, FL  United States  33174

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Performing Organizations:

  Florida International University

  Department of Civil and Environmental Engineering
  ,    
• Start Date: 20240101
• Expected Completion Date: 20250630
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Columns; Composite materials; Earthquake resistant design; Hinges; Structural connection; Ultra high performance concrete
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 01924829
• Record Type: Research project
• Source Agency: Accelerated Bridge Construction University Transportation Center (ABC-UTC)
• Files: UTC, RIP
• Created Date: Jul 21 2024 2:44PM