- Author
-
Cheok, G. S.
|
Stone, W. C.
- Title
- Performance of 1/-3-Scale Model Precast Concrete Beam-Column Connections Subjected to Cyclic Inelastic Loads. Report No. 3.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Sponsor
- Concrete Research Council, Detroit, MI
- Report
-
NISTIR 5246,
August 1993,
136 p.
- Distribution
- AVAILABLE FROM: National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161. Telephone: 1-800-553-6847 or 703-605-6000; Fax: 703-605-6900; Rush Service (Telephone Orders Only) 800-553-6847; Website: http://www.ntis.gov
- Contract
- 92-0A-055
- Keywords
-
building technology
|
beam-columns
|
concretes
|
connections
|
cyclic loading
|
joints
|
precast
|
post-tensioning
|
story drift
- Abstract
- Test results of hydrid post-tensioned precast concrete beam-to-column connections are presented. These tests represent Phase 4 A of an experimental program on 1/3-scale model precast concrete moment resisting connections being conducted at the National Institute of Standards and Technology. Previous test results in Phases 1 to 3 are 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 basic concept of the study is to use post-tensioning to connect the members and to eliminate the use of column corbels. Monolithic control specimens tested in Phase 1 were designed to model interior moment resisting connections designed in accordance with the Uniform Building Code [ICBO, 1985 and 1988] criteria for seismic Zones 2 and 4. The precast specimens were designed to achieve moment and geometric compatibility with the monolithic design. To date, twenty specimens have been tested. Variables in the study include the location of the post-tensioning steel (Phase 1), the use of post-tensioning bars versus strands (Phase 2), the use of fully and partially bonded and unbonded strands (Phase 3), and the combination of low strength steel and post-tensioning (Phase 4, described in this report). Specimens were subjected to reversed cyclic loading according to a prescribed displacement history. Comparisons are made between the behavior of the precast specimens and monolithic specimens. The comparisons are based on connection strength, drift capacity of the connection, and energy dissipation characteristics.