Seismic Performance Behavior of Precast Concrete Beam-Column Jointsby Geraldine S. Cheok, NIST, Gaithersburg, United States,
William C. Stone, NIST, Gaithersburg, United States,
H. S. Lew, NIST, Gaithersburg, United States,
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 test specimens were interior connections designed using the Uniform Building Code [ICBO, 1985 and 1988] criteria for seismic Zones 2 and 4 as guidelines. To date, fifteen specimens have been tested. Variables in the study include location 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 absorption characteristics.
Subject Headings: Seismic tests | Precast concrete | Connections (structural) | Structural behavior | Seismic loads | Bars (structure) | Earthquake resistant structures | Columns
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