The Service and Ultimate Behavior of Bent-to-Column Joints in TxDOT Substructures [Project Summary]

Details

• Creators:
  Bayrak, Oguzhan ; Wang, Hwa-Ching ; Briscoe, Terence J. ; Kraus, Pavel ; Castano, Juan E. ; Mursel, Seda ; Yu, Yongjae ; Jang, Hansol ; Saqan, Elias ; Zaborac, Jarrod ; Webb, Zachary D. ; Ferche, Anca C.
• Corporate Creators:
  University of Texas at Austin. Center for Transportation Research
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Bent-to-Column Joints Bents Bridge Substructures Capacity Design Civil Engineers Columns Crashes Design Capacity Development Length Disaster Resilience Extreme Events Flexural Strength Floods Hinges Joint Confinement Joints Length Loss Of Column Plastic Hinge Plastics Reinforced Concrete Transportation Engineers Vehicular Collision

  More +
• Publication/ Report Number:
  0-7113
• Resource Type:
  Brief
• Geographical Coverage:
  United States ; Texas
• Edition:
  Project Summary Report
• Corporate Publisher:
  University of Texas at Austin. Center for Transportation Research
• Abstract:
  The researchers employed a multi-phase approach beginning with analytical modeling of typical TxDOT multi-column bents. Using plastic collapse mechanism analysis, they determined the flexural strength required to withstand the AASHTO-specified 600-kip vehicular collision load. This analysis established that while a ductile flexural failure in the columns is the ideal outcome, factors such as insufficiently anchored longitudinal bars or lack of joint confinement could lead to premature failure. Following this, the team conducted large-scale experimental testing on thirteen full-scale bent-to-column joint specimens under lateral loading (Figure 2). These tests simulated lateral loading from vehicle collisions to evaluate various detailing strategies, including different anchorage types (straight, hooked, and headed bars), joint confinement methods, and construction techniques. Finally, the experimental data was used to validate high-fidelity nonlinear finite element models (Figure 2), providing a deeper look at stress distributions and reinforcing bar development lengths under various conditions.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:bcd2f37b35b2e3771bf2bf39fa227508c2a1ac2abdd2604832e742a6c742a71a98ef047ff4ebd28e8ee902d743873ed1d7cfc6de90145049e61c0c183257b1f4
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89059/dot_89059_DS1.pdf
• File Type:
  [PDF - 314.99 KB ]