Performance of Hybrid Moment-Resisting Precast Beam-Column Concrete Connections Subjected to Cyclic Loading.
Performance of Hybrid Moment-Resisting Precast
Beam-Column Concrete Connections Subjected to Cyclic
Loading.
(2356 K)
Stone, W. C.; Cheok, G. S.; Stanton, J. F.
Title 92-S22;
ACI Structural Journal, Vol. 91, No. 2, 229-249,
March/April 1995.
Keywords:
building technology; beam-column; concretes;
connections; cyclic loading; joints; precast;
post-tensioning; story drift
Abstract:
Test results of ten hybrid precast concrete
beam-to-column connections are presented. These tests
constitute Phave IV of an experimental program on
1/3-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.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899