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Development of Earthquake-Resistant Ceiling Structureby Lightweight Square Steel
*1
Shinya Matsumoto*2
Masafumi Sato*3
Yoshinobu Fujitani
The Great East Japan Earthquake occurred on March 11, 2011, it has been reported thatmany dropped out damage for nonstructural components (ceiling) in a buildings. The fall ofceiling materials is high risk for human damage especially. Large space structures or publicgymnasium, etc. must be a safe place, because of it will be used a shelter in a disaster.Therefore, it is important to grasp the seismic performance for nonstructural components suchas ceiling. In this study, the basic characteristics of seismic performance for suspended ceilingstructure are investigated. In this study, the suspended ceiling structure with improvedseismic resistance (earthquake-resistant ceiling structures) using a lightweight steel pipe withcaulking is proposed. In this paper, the results of vertical and horizontal loading test areshown, and the mechanical properties of suspended ceiling structure are verified.
Keywords: Ceiling structures, Lightweight square steels, Caulking
2011 3 11
(1)
(2)-(4)
(5)
(6)
1
1.
JIS G3302(SGCC-Z12)
12
3 3 3JIS (JIS Z
* 2014 5 12*1 739-2116 1
E-Mail [email protected]*2 733-0802 2-24-24
E-Mail [email protected]*3 739-2103 1-4-1
－ 73 －
近畿大学次世代基盤技術研究所報告 Vol. 5（2014）73－78
221
(m
1
41)
JIS
1
2
3
2
2.
mm×mm×mm)
.2×1219×844
3 5
2-1 3
1.25
1.
2.
(kg)C
×10-3
9670 59
16
3-1
2mm
5
Si
×10-2Mn
×10
2.5 19
1
2
2
(%)
n
0-2P
×10-3 ×
9 10
31-1
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×10-3
8
3.
4.
5.
1
2
3
6.
1
2
3
－ 74 －
33 1 372N/mm2
2 397N/mm2 3414N/mm2
1
23
1 285N/mm2
2 343N/mm2 3 385N/mm2
1.69×105
1.82×105N/mm2 (2.05×105N/mm2)1
1 34.0% 2 32.8%3 26.6%
0.309 0.3221 3
3.
1. 1-1
2. 2-1
3. 3-1
7 90mm180mm 2 45mm×45mm
1.2mm1.0mm 0.8mm 3
4
A B7. 1.2mm,1.0mm,0.8mm
4.
8 9 A 90mmB 180mm -
1.2mm
54
106
1.2mm
max
N/mm2 N/mm2
E
N/mm2 %y
90mm
45mm
45mm 180mm
45mm
45mm
－ 75 －
1.2mm 0.8mm0.69
A 4 6
8. A
9. B
5.
10.
6.
mm N/mm2
1.2 45×45×1.2 290 1.00 1.0 45×45×1.0 250 0.86 0.8 45×45×0.8 199 0.69
4. A-1 1.2mm
5. A-2 1.0mm
6. A-3 0.8mm
1.2mm
F=280N/mm2
1.69×105N/mm2
0
50
100
150
200
250
300
350
0 1 2 3 4 5 6 7 8
(N/m
m2 )
(mm)
A-1
A-2
A-3
0
50
100
150
200
250
300
350
0 1 2 3 4 5 6 7 8
(N/m
m2 )
(mm)
B-1
B-2
B-3
y = -4.7803x + 467.24
0
50
100
150
200
250
300
350
30 35 40 45 50 55 60
(N/m
m2 )
b/t
－ 76 －
1
1-2
7 1
7. 1
100×
45×
11-1 11
2 12
11.
7.
kg/m
×45×1.2 2.9
45×1.2 1.8
1/2’ -
12
1-1
3m
m cm2
91 3.71
87 2.39
0.925
2
cm4
Ix
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7.66 7
0.0682
7
Iy
13.7
7.35
1/713
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75 1/50 1/
14
91-1
31
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1-2
13.
1/450 1/320 1/15rad
1-1
8 1
39.0kN-1 107.32
P0.6
1.5
300 1/200d
1-2
21.7kN
kg 1P/W
1
1/150 1/100
8
1-2 129.951-1 20.6
1.8
0
-
8
1-2
5kg6
－ 77 －
14. -
8. 1-1
9. 1-2
8. 1
P(kN) M(kg) W(kN) P/W
1-1 21.7 107.32 1.05 20.6
1-2 39.0 129.95 1.27 30.6
(1) “” BP (2011-6)
(2) “”
73 630 (2008-8)pp.1295-1302
(3) “”I (2010-9) pp.859-860
(4)“
11”
I (2010-9) pp.863-864 (5) “
”34 (2011-3) pp.57-60
(6) “”
35 (2012-3) pp.293-296 (7)
2013 3 4(8) “
”No.47 (2013-12) pp.49-54
-30
-20
-10
0
10
20
30
40
50
-100 -50 0 50 100 150
(kN)
(mm)
1-2( )
1-1( )
－ 78 －
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