Post on 26-Jun-2020
transcript
Abstract The analyses were performed on prestressed concrete frames subjected to reversed loading. The
variables include the ratio of the amount of prestressed concrete steel to that of total longitudinal
reinforcement and the ratio of the number of yield hinges at the column to that of total hinges in the
mechanism. On the basis of the results the effects of the variables on the hysteretic behavior of prestressed
concrete frames were clarified.
Key words Reversed loading , Prestressed concrete frames , Yield hinge , Hysteretic behavior
PC RC
PC RC PCRC
PC RC3 PC
1) 6
RC PC 1)
C YKe Mcr Mu
3) My Mu 90%
B
rypyrryppyu b
TTNDNdTdTM2
)(2
2
(1)
dp = PC dr =
B = b = D =
Ry
eyyy KMR / ······································· (2)
y 4)
Y
C
Kp R Kpp R
M2 M
Ke R
M1
K
Y
KppppKK
C
Y
C
〔論文〕
2
33.01043.05.364.1Dd
Da
Dd
pnpn ro
ggsty ·············································· (3)
a = pg = PC pt = 0 = = N/( B) n ns = PC dg = PC
PC
21 )1( MMM (4)
gr
gogr
q
q2
(5)
M1 M2 = , qr = = at ry/( B)
g = Pe/( B) = Rmax/Ry < 1 = 1
Kp Ke K r4)
KrKrK ep 1 (6)
yrar (7)
K = = Rmax/Ry μ > 1 μ = 1 Ry = y = ar = a/(4D) ar > 1 ar = 1
S5)
yy
epp
KK (8)
RC PC4m 18m 6
Ai
12kN/m2
50 100 200 400600 800 1200 mm
2Db
2
ii
iib m
mD ············································· (9)
a)b) c)
132
= (10)
( ) 0, 1/6, 1/5, 1/4, 1/3, 1/2, 1 ( p) 0, 0.2, 0.4, 0.6, 0.8, 1
b (mm)
D (mm)
dr (mm)
dp (mm)
750 1200 1140 840 1000 1000 940 ---
( 4m 18m 6m×
12kN/m2
PC
B
(N/mm2)
Ec
(N/mm2)
ry
(N/mm2)
ES
(N/mm2)
py
(N/mm2)
Ep
(N/mm2)
36 26000 380 205000 1600 205000
=4m
=18m
〔論文〕
PCPC
p = (11)
2eqh ········································································ (12)
p
1) p 0RC RC
RC 2) p 1 PC
3) 0 p p
1PC S
4) 1 RCPC
0.3 0.5
p 0.8 1 PCPC
5)
p
0.3 1 3 2 4 3 5 4 61 1
2 3 4 5 6
0.3 1
3 μ = 2
heq-μ
0 0.3 0.5 1
0
5
10
15
20
25
30
0 2 4 6 8 10
heq(%)
μ 2 4 6 8
h
0
5
10
15
20
25
30
0 2 4 6 8 10
heq(%)
μ 0
5
10
15
20
25
30
0 2 4 6 8 10
heq(%)
μ
〔論文〕
1 p 11 5 6 = 1 p = 1 3
1) 2) 1
5 6
6 p
1) p
2) p PC
3)
5 6
1)2009 8 pp.789-790
2)1996 2 No.480 pp.151-160
3) 19984)
pp.63-66 No.410 19905)
pp.731-732 2014
0( RC) 0.8(PC) 1( PC)
0.3
1
0
5
10
15
20
25
30
0 2 4 6 8 10
5
0 heq(%)
μ
0
5
10
15
20
25
30
0 2 4 6 8 10
0 heq(%)
μ 0
5
10
15
20
25
30
0 2 4 6 8 10
(heq(%)
μ
0
5
10
15
20
25
30
0 2 4 6 8 10
0 heq(%)
μ 0
5
10
15
20
25
30
0 2 4 6 8 10
5
0 heq(%)
0
5μ 0
5
10
15
20
25
30
0 2 4 6 8 10
5
0 heq(%)
μ
p
heq-μ
1 2 3 4 5 61 3 2 4 3 5 4 6
0
1
2
3
4
5
6
0 100 200 300 400
(mm)
p 1 1
〔論文〕