Behavior of Unbonded, Post-Tensioned, Precast Concrete Connections with Different Percentages of Mild Steel Reinforcement

This paper presents results of tests performed on posttensioned, precast concrete moment-resisting, beam-column connections containing various mild steel reinforcement contents. In the experimental program, 5 hybrid connections were tested under displacement-controlled reversed cyclic loading. The main variable was the mild steel's percentage of contribution to the flexural capacity of the connection, ranging from 0-65% of the connection's moment capacity. Each hybrid connection was compared with test result of the reference monolithic subassembly in terms of connection strength, stiffness degradation, energy dissipation, and permanent displacement. The aim of this paper was to determine the effect of mild steel reinforcement content on behavior and performance of posttensioned, precast concrete hybrid connections. Response of posttensioned, precast concrete hybrid connections approached that of monolithic subassemblies as the mild steel reinforcement content increased. Connection capacities were well predicted by the joint gap-opening approach. Design assumptions of hybrid connections are best satisfied with 30% mild steel reinforcement to the connection's flexural capacity.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 32-44
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01046660
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 10 2007 10:20PM