NEHRP Clearinghouse
- Title
- Overview of NIST Research on Seismic Performance of Moment Resisting Precast Concrete Beam-Column Joints Containing Post-Tensioning.
- File
- PB94103686.pdf
- Author(s)
- Cheok, G. S.; Stone, W. C.
- Source
- August 1993, 38 p.
- Identifying Number(s)
- NISTIR-5257
- Abstract
- The experimental test program being conducted at the National Institute of Standards and Technology on 1/3-scale model precast concrete beam-to-column connections is summarized. The objective of the test program is to develop guidelines for an economical precast beam-to-column connection for regions of high seismicity. The monolithic test specimens were interior moment resisting connections designed using the Uniform Building Code (ICBO, 1985 and 1988) criteria for seismic Zones 2 and 4 as guidelines. To date, seventeen specimens have been tested. Variables in the study include locations of the post-tensioning steel, the use of post-tensioning bars versus prestressing strands, fully bonded versus partially bonded strands, and the combination of low strength steel and post-tensioning. Specimens were subjected to reversed cyclic loading according to a prescribed displacement history. Comparisons were made between the behavior of precast specimens and monolithic specimens. The comparisons were based on connection strength, connection ductility, and energy dissipation characteristics.
- Keywords
- ; Moments; Columns (Supports); Loads (Forces); Structural members; Damage assessment; Cyclic loads; Ductility; Prestressed concrete; Earthquake damage; Buildings; Concrete structures; Structural analysis; Beams (Supports); Precast concrete; Construction joints; Model tests; Earthquake engineering; Energy dissipation; Boundary conditions