Abstract

The non-linear performance of beam-column joint specimens with different types of reinforcement (thermo-mechanically treated [TMT] and twisted ore reinforced [TOR]) has been evaluated under cyclic loading. A number of parametric variations in the preparation of joints, such as the type of reinforcement, the percentage of reinforcement, and the effect of confinement, have been studied. Comparative cyclic test results have been plotted in the form of hysteresis behavior, envelope of load deformation curves, cumulative energy dissipation curves, strength and stiffness decay curves, etc. The effects of types of reinforcement and confinement of beam-column joint specimens possessing the same percentage of reinforcement have been clearly manifested in non-linear performance evaluation parameters. The energy dissipation in beam-column joint specimens increases with the percentage of reinforcement, but it also decreases as the reinforcement characteristics change from ductile to brittle. A higher over-strength ratio has been observed in joint specimens with TOR reinforcement than in specimens with TMT reinforcement. The post-elastic stiffness degradation is lower in specimens with TMT reinforcement than in specimens with TOR reinforcement over a constant post-elastic drift.

Issue Section:
Research Papers
Keywords:
cyclic testing, performance evaluation, external beam-column joint, modeling parameters, hysteresis behavior

References

1.
Ehsani
,
M. R.
 and
Wight
,
J. K.
, “
Confinement Steel Requirements for Connections in Ductile Frames
,”
J. Struct. Eng.
, Vol.
116
, No.
3
,
1990
, pp.
751
–
767
. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:3(751)
Google Scholar
Crossref
Search ADS
 
2.
Hwang
,
S.-J.
,
Lee
,
H.-J.
,
Liao
,
T.-F.
,
Wang
,
K.-C.
, and
Tsai
,
H.-H.
, “
Role of Hoops on Shear Strength of Reinforced Concrete Beam-Column Joints
,”
ACI Struct. J.
, Vol.
102
, No.
3
,
2005
, pp.
445
–
453
.
3.
Durrani
,
A. J.
 and
Wight
,
J. K.
, “
Experimental Study of Interior Beam to Column Connections Subjected to Reversed Cyclic Loading
,”
Proceedings of the Eighth World Conference on Earthquake Engineering
,
San Francisco, CA
, July 21–28,
1984
, pp.
429
–
438
.
4.
Tsonos
,
A. G.
, “
Cyclic Load Behaviour of Reinforced Concrete Beam-Column Subassemblages Designed According to Modern Codes
,”
Eur. Earthquake Eng.
, Vol.
3
,
2006
, pp.
3
–
21
.
5.
Brown
,
P. C.
 and
Lowes
,
L. N.
, “
Fragility Functions for Modern Reinforced-concrete Beam-Column Joints
,”
Earthquake Spectra
, Vol.
23
, No.
2
,
2007
, pp.
263
–
289
. https://doi.org/10.1193/1.2723150
Google Scholar
Crossref
Search ADS
 
6.
Nie
,
J.
,
Bai
,
Y.
, and
Cai
,
C. S.
, “
New Connection System for Confined Concrete Columns and Beams. I: Experimental Study
,”
J. Struct. Eng.
, Vol.
134
, No.
12
,
2008
, pp.
1787
–
1799
. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:12(1787)
Google Scholar
Crossref
Search ADS
 
7.
Benavent-Climent
,
A.
, Cahis, X., and
Gil
,
F.
, “
Experimental Investigation on RC Exterior Wide Beam-Column Connections Subjected to Cyclic Loading
,”
Proceedings of the Fourteenth World Conference on Earthquake Engineering
,
Beijing, China
, October 12–17,
2008
, pp.
1
–
8
.
8.
Meinheit
,
D. F.
 and
Jirsa
,
J. O.
, “
Shear Strength of R/C Beam-Column Connections
,”
J. Struct. Div.
, Vol.
107
, No.
ST11
,
1981
, pp.
2227
–
2244
.
9.
Tang
,
J.
 and
Xu
,
X.
, “
Seismic Behavior of Lightweight Reinforced Concrete Beam-Column Joints
,”
Proceedings of the Ninth World Conference on Earthquake Engineering
,
Tokyo-Kyoto
,
Japan
, August 2–9,
1988
, pp. 651–656(IV).
10.
Hakuto
,
S.
,
Park
,
R.
, and
Tanaka
,
H.
, “
Seismic Load Tests on Interior and Exterior Beam-Column Joints With Substandard Reinforcing Details
,”
ACI Struct. J.
, Vol.
97
, No.
1
,
2000
, pp.
11
–
25
.
11.
Pantelides
,
C. P.
,
Clyde
,
C.
, and
Reaveley
,
L. D.
, “
Performance-Based Evaluation of Reinforced Concrete Building Exterior Joints for Seismic Excitation
,”
Earthquake Spectra
, Vol.
18
, No.
3
,
2002
, pp.
449
–
480
. https://doi.org/10.1193/1.1510447
Google Scholar
Crossref
Search ADS
 
12.
Castro
,
J. J.
 and
Imai
,
H.
, “
Structural Performance of Exterior Beam Column Joints With Mechanical Anchorage at Main Bars
,”
Proceedings of the Thirteenth World Conference on Earthquake Engineering
,
Vancouver, BC, Canada
, August 1–6,
2004
, Paper No. 2474.
13.
Megget
,
L. M.
,
Barton
,
M. B.
, and
Fenwick
,
R. C.
, “
Seismic Design and Behavior of External Reinforced Concrete Beam-Column Joints Using 500E Grade Steel Reinforcing
,”
Proceedings of the Thirteenth World Conference on Earthquake Engineering
,
Vancouver, BC, Canada
, August 1–6,
2004
, Paper No. 3472.
14.
Kang
,
T. H.-K.
,
Ha
,
S.-S.
, and
Choi
,
D.-U.
, “
Seismic Assessment of Beam-to-Column Interaction Utilizing Headed Bars
,”
Proceedings of the Fourteenth World Conference on Earthquake Engineering
,
Beijing, China
, October 12–17,
2008
, pp.
1
–
8
.
15.
IS 1893 (Part 1)
,
2002
, “
Indian Standard Criteria for Earthquake Resistant Design of Structures
,”
Fifth Revision, Bureau of Indian Standards
,
New Delhi, India
.
16.
IS 456
,
2000
, “
Indian Standard Plain and Reinforced Concrete Code of Practice
,”
Fourth Revision, Bureau of Indian Standards
,
New Delhi, India
.
17.
IS 13920
,
1993
, “
Indian Standard Ductile Detailing of Reinforced Concrete Structures Subjected to Seismic Forces—Code of Practice
,”
Bureau of Indian Standards
,
New Delhi, India
.
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