Cyclic Testing Of Reinforced Concrete
Beam-column Joints With Crossed Inclined Bars
Author(s)
C. E. Chalioris, C. G. Karayannis & M. I. Favvata
Abstract
The use of crossed inclined bars in external beam-column connections under
cyclic deformations is experimentally investigated. For this purpose, test results
of four Reinforced Concrete (RC) joint subassemblages subjected to constantly
increasing pseudo-seismic loading are presented. The shear reinforcement in the
joint area for two specimens was two pairs of inclined bars that formed a pair of
X-type reinforcement. The other two specimens were conventionally reinforced
joints (control specimens). The effectiveness of this X-type, non-conventional
reinforcement on the overall seismic performance of the tested joints is
examined. The beam and the columns of all the specimens were designed
according to the requirements of ACI 318-02 and the recommendations of
ACI-ASCE 352-02 (Type 2 exterior connections). The design of the joint area
for one control specimen was also carried out according the ACI Design Codes
and the required amount of steel stirrups (5∅8) was added in the joint body. The
other control specimen had no stirrup at the joint area. Comparisons between the
test results of the examined specimens indicated that the cyclic behaviour of the
joints with X-bars was ameliorated with respect to the response of the control
specimen without stirrups. Further, load capacity and hysteretic energy
dissipation values of the joint with 2X-bars ∅14 were slightly lower than the
values of the control specimen which joint area had stirrups (5∅8) according to
the specifications of ACI Design Codes.
Keywords: beam-column joint, cyclic tests, reinforced concrete, inclined bars.
Keywords
beam-column joint, cyclic tests, reinforced concrete, inclined bars.
Related Book
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