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TRANSCRIPT
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1
1 2 3
1 611-0011
E-mail:[email protected] 2 615-8540
E-mail: [email protected] 3 530-0011 2 189 3F
RC UBRC
- RC
Key Words : Unbonded bar reinforced concrete, Dynamic response, Dynamic loading,
Shake table test
RC
RC UBRC1-3)
UBRC
UBRC
UBRC
UBRC
UBRC
UBRC RC
RC
—
UBRC
2
UBRC
UBRC
RC
0.1 mm/s
RC
0.01 μ/s
RC
UBRC
320 320 mm
1280 mm ( ) SD295 D10
16 SD295 D4 40 mm
C PC
220 mm
1350 mm
PC
1 MPa
5 mm 60 mm 5
mm 3
1.67 Hz
60 mm 62.9 kine
1000 UBRC
1
3
3
SU
DU-1
DU-2
3 -
(SU)
(DU-1)
(DU-2)
(DU-1)
UBRC
30 mm
UBRC
(e) SU
(b) DU-1
(c) DU-2
(d) Skeleton Curves
-
4
(a) SU (b) DU-1
UBRC
RC
UBRC
7.5 1
320 320 mm 1600 mm
SD295 D10 16
SD295 D4 40 mm
C PC
220 mm 1530
mm RC
UBRC UBRC RC
RC UBRC
UBRC
RC
1 MPa
10 ton
1600 mm
780 mm
1600 mm
x, y, z
x, y, z 2
x, y, z
x, y, z
-100 mm 1200 mm
1995 JR
NS, EW, UD
x
NS y EW
5
RC
40% 90% 10%
RC-1
RC (RC-2) UBRC 20%
100
RC-1
RC
UBRC 100% -
NS UBRC
EW
NS-EW 45
( )
UBRC
RC-2
RC UBRC
RC
(a) NS
(b) EW
(c)
(d)
- UBRC
6
100%
RC-2
95.8 mm
19.8 mm UBRC
89.3 mm 12.0
mm RC-2 61
UBRC
UBRC
RC UBRC
(S)19676004
1)
RC
Vol.I-60 No.710, pp.283-296 2002
2)
UBRC
Vol.V-65 No.774, pp.59-72 2004
3)
UBRC
Vol.27, Paper
No.196 2003
DYNAMIC RESPONSE BEHAVIOR OF UNBONDED BAR REINFORCED
CONCRETE STRUCTURE
Yoshikazu TAKAHASHI, Yoshihide IMOTO and Takanori WATAJIMA
Unbonded Bar Reinforced Concrete (UBRC) structure was developed as a high seismic performance
pier because of its positive second stiffness. In this study, the dynamic response behavior is investigated
by dynamic cyclic loading tests and shake table tests. In the dynamic loading tests, it is found that the
loading rate dependency in UBRC structure is not significant and the second stiffness of UBRC structure
can be expected even in the high speed rate. In the shake table tests, the 3D dynamic response behavior
was investigated and it is found that the hysteresis loop of UBRC structure in the primary response
direction has the positive and stable second stiffness and small residual deformation even after
earthquakes. As the results, it is clear that UBRC structures have high seismic performance.
RC-2 UBRC
Time (sec)Dis
tan
ce f
rom
ori
gin
(m
m) 100
50
0
RC-2UBRC