NEHRP Clearinghouse
- Title
- Performance of 1/3-Scale Model Precast Concrete Beam-Column Connections Subjected to Cyclic Inelastic Loads. Report No. 3.
- File
- PB94101813.pdf
- Author(s)
- Cheok, G. S.; Stone, W. C.
- Source
- Concrete Research Council, Detroit, MI., August 1993, 142 p.
- Identifying Number(s)
- NISTIR-5246
- Abstract
- The tests results of hybrid post-tensioned precast concrete beam-to-column connections (Phase IV A) are presented. These tests are part 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 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 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 geometry compatibility with the monolithic design. To date, twenty specimens have been tested. Variables in the study include location of the post-tensioning steel, the use of post-tensioning bars versus strands, the use of fully and partially bonded and unbonded 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 the precast specimens and monolithic specimens. The comparisons were based on connection strength, drift capacity of the connection, and energy dissipation characteristics.
- Keywords
- ; Earthquake resistant structures; Beams (Supports); Failure; Precast concrete; Construction joints; Model tests; Concrete structures; Earthquake engineering; Cyclic loads; Ductility; Concrete construction