Title:
Performance of Hybrid Moment-Resisting Precast Beam-Column Concrete Connections Subjected to Cyclic Loading
Author(s):
William C. Stone, Geraldine S. Cheok, and John F. Stanton
Publication:
Structural Journal
Volume:
92
Issue:
2
Appears on pages(s):
229-249
Keywords:
beam-column frame; concrete construction; cyclic loads; earthquake-resistant structures; joints (junctions); moments; post-tensioning; precast concrete; Structural Research
DOI:
10.14359/1145
Date:
3/1/1995
Abstract:
Test results of 10 hybrid precast concrete beam-to-column connections are presented. These tests constitute Phase IV of an experimental program on one-third-scale model precast moment-resisting connections conducted at the National Institute of Standards and Technology (NIST). The objective of the test program is to develop guidelines for the design of moment-resisting precast connections in regions of high seismicity. The hybrid connections consist of mild steel used to dissipate energy and post-tensioning (PT) steel used to provide the required shear resistance. Variables examined were the amount and type of mild steel (ASTM A 615). The amount of post-tensioning steel was varied to control the relative moment capacity contributed by the PT and mild steel. The specimens were subjected to reversed cyclic loading in accordance with a prescribed displacement history. Connection performances were compared to previous NIST tests based on energy-dissipation capacity, connection strength, and drift capacity. Hybrid precast connection can be designed to match or exceed the performance of a monolithic connection in terms of energy dissipation, strength, and drift capacity.