2軸地震波振動台を用いた長周期地震動の再現性に関する検証

Memoirs of National Institute of Technology, Akashi College, Japan No.57 (2015.2)
䠎㍈ᆅ㟈Ἴ᣺ືྎ䜢⏝䛔䛯㛗࿘ᮇᆅ㟈ື䛾෌⌧ᛶ䛻㛵䛩䜛᳨ド㻌
୰ᕝ ⫕*
Demonstration of Reappearance in Long Period Ground Motion
Using Two Dimensional Earthquake Shaking Simulators
Hajime NAKAGAWA
ABSTRACT
This paper presents the demonstration of reappearance in long period ground motions using
two dimensional earthquake shaking simulators. The long period ground motions based on the
K-NET earthquake observation systems are the 2003 Tokachi offshore earthquake in the K-NET
Tomakomai, and the 2011 off pacific coast of Tohoku earthquake in K-NET Furukawa and Osaka.
The demonstration of reappearance in long period ground motions are estimated for the
maximum acceleration response and the frequency characteristics between earthquake waves
recorded in the K-NET systems and earthquake waves that reappeared using two dimensional
shaking simulators.
KEY WORDS:
Reappearance of long period ground motions, 2003 Tokachi offshore
earthquake, 2011 off pacific coast of Tohoku earthquake
ᆅ㟈 K-NET Ɫᑠ∾Ἴࠊᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈 K-NET
ྂᕝἼ㸦ᐑᇛ┴኱ᓮᕷ㸧
ࠊK-NET ኱㜰Ἴ࡟࠾ࡅࡿ NS
ᡂศࠊEW ᡂศࡢྜィ 6 ᡂศࡢ෌⌧ᐇ㦂ࢆ⾜࠺ࠋ
K-NET ࡛ほ ࡉࢀࡓグ㘓Ἴᙧ㸦௨ୗࠊ┠ᶆἼ㸧࡜
᣺ືྎ࡛෌⌧ࡋࡓᆅ㟈Ἴᙧ㸦௨ୗࠊ෌⌧Ἴ㸧ࡢ᭱኱
ຍ㏿ᗘᛂ⟅್ཬࡧࡑࡢ࿘Ἴᩘ≉ᛶࢆẚ㍑ࡋࠊࡑࡢ෌
⌧ᛶࢆ᳨ドࡍࡿࡇ࡜࡛࠶ࡿࠋ᣺ືྎᐇ㦂࡟࠾࠸࡚ࠊ
ᆅ㟈ືࡢ෌⌧ᛶࢆ㏣ཬࡋ࡚࠸ࡿㄽᩥࡣᑡ࡞ࡃࠊ㛗࿘
ᮇᆅ㟈ືࢆ෌⌧ࡋ࿘Ἴᩘ≉ᛶࡢほⅬ࠿ࡽ᳨ドࡍࡿ
ព࿡ࡣ༑ศ࡟࠶ࡿࠋ
䠍䠊䛿䛨䜑䛻㻌
1995 ᖺࡢරᗜ┴༡㒊ᆅ㟈௨ᚋࠊ᪥ᮏྛᆅࡢᆅ㟈ほ
⥙㸦K-NETࠊKiK-net ➼㸧1)ࡀᩚഛࡉࢀࠊᆅ㟈Ⓨ⏕
ᚋ࡟༶ᗙ࡟ほグ㘓ࡀධᡭྍ⬟࡜࡞ࡗࡓࠋ
ᮏᰯᘓ⠏Ꮫ⛉ࡀಖ᭷ࡋ࡚࠸ࡿ 3 ㍈ᆅ㟈Ἴ᣺ືྎࢆ
ᖹᡂ 23 ᖺᗘᮎ࡟ᨵⰋࡋࠊ1 ㍈᣺ືྎ࡛ᆅ㟈ࡢ⥅⥆᫬
㛫ࡀ 60 ⛊௨ୖ࡛㛗࿘ᮇᆅ㟈ືࡀ෌⌧࡛ࡁࡿࡼ࠺࡟
࡞ࡗࡓࠋ๓ሗ 2)࡛ࡣࠊࡇࡢ 1 ㍈ᆅ㟈Ἴ᣺ືྎࢆ⏝࠸
࡚ 2003 ᖺࡢ༑຾Ἀᆅ㟈ࠊ2004 ᖺࡢ⣖ఀ༙ᓥ༡ᮾἈ
ᆅ㟈ࠊ2011 ᖺࡢᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈࡟࠾ࡅࡿࡸࡸ
㛗࿘ᮇࡀ༟㉺ࡍࡿᆅ㟈ືࢆ෌⌧ࡋࠊ࿘Ἴᩘ≉ᛶࡢほ
Ⅼ࠿ࡽ᳨ウࢆຍ࠼ࡓࠋ
๓ሗ 2)࡛♧ࡋࡓᆅ㟈Ἴ᣺ືྎࢆ᭦࡟ᨵⰋࡋࠊ᣺ື
ྎࡢ㉁㔞ࢆ㍍㔞໬ࡋࠊ༡໭᪉ྥ㸦X ᪉ྥ㸧ࠊᮾす᪉
ྥ㸦Y ᪉ྥ㸧ࡢຍ᣺ᶵࢆኵࠎ3 ྎࠊ2 ྎ࡟ቑᙉࡍࡿ
ࡇ࡜࡟ࡼࡗ࡚ࠊ2 ㍈ᆅ㟈Ἴ᣺ືྎ࡟࠾࠸࡚ࠊ↓㈇Ⲵ
࡛᭱኱ຍ㏿ᗘࡀ⣙ 1100cm/s2㸦1.12G㸧ࠊ᭱኱㏿ᗘࡀ
80cm/sࠊ᭱኱ኚ఩ࡀ 125mmࠊ⥅⥆᫬㛫ࡀ 650 ⛊ࡲ࡛
ෆ㝣ᆺ࠿ࡽ㛗࿘ᮇᆅ㟈ືࡲ࡛෌⌧ྍ⬟࡟࡞ࡗࡓࠋ
ᮏሗࡢ┠ⓗࡣࠊ2 ㍈ᆅ㟈Ἴ᣺ືྎࢆ⏝࠸࡚༑຾Ἀ
䠎䠊ᆅ㟈Ἴ᣺ືྎ䛾ᨵⰋཬ䜃ᐇ㦂ᴫせ㻌
䠎䞉䠍㻌 ᆅ㟈Ἴ᣺ືྎ䛾ᨵⰋタィ㻌
๓ሗ 2)࡛♧ࡋࡓ෗┿ 1 ࡢ 2 ㍈ᆅ㟈Ἴ᣺ືྎ࡜ຍ᣺
ᶵࢆ᣺ືྎ࠿ࡽษࡾ㞳ࡍࡇ࡜࡟ࡼࡗ࡚ 1 ㍈༢య࡛ຍ
᣺ࡍࡿࡇ࡜ࡀྍ⬟࡜࡞ࡗࡓࠋ
෗┿ 1 ࡟♧ࡍ 2 ㍈ᆅ㟈Ἴ᣺ືྎࡢຍ᣺ᶵࡢቑᙉᕤ
஦ࠊไᚚࢩࢫࢸ࣒ࡢ᭦᪂ཬࡧ᣺ືྎࡢ㍍㔞໬ࢆᅗࡾࠊ
2 ㍈ᆅ㟈Ἴ᣺ືྎ࡟࠾࠸࡚ࠊప࿘Ἴᩘ࠿ࡽ㧗࿘Ἴᩘࠊ
ᆅ㟈ືࡢ⥅⥆᫬㛫ࡀ 650 ⛊ࡲ࡛ຍ᣺ྍ⬟࡜࡞ࡿࡼ࠺
࡟ᨵⰋタィࢆ⾜ࡗࡓࠋ෗┿ 2 ࡟ᨵⰋࡋࡓ 2 ㍈ᆅ㟈Ἴ
᣺ືྎࡢ඲ᬒࢆ♧ࡍࠋ
*ᘓ⠏Ꮫ⛉
23
明石工業高等専門学校研究紀要　第57号（平成27年2月）
࠾࠸࡚㏿ᗘᛂ⟅ࡀ༟㉺ࡋ࡚࠾ࡾࠊࡸࡸ㛗࿘ᮇᆅ㟈ື
࡜ุ᩿࡛ࡁࡿࠋ
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
䠏䞉䠍㻌 ༑຾Ἀᆅ㟈䛾෌⌧㻌
ᅗ 2 ࡟ࡣࠊ༑຾Ἀᆅ㟈 K-NET Ɫᑠ∾Ἴࡢ NSࠊEW
ᡂศ࡟㛵ࡍࡿ┠ᶆἼ࡜෌⌧Ἴࡀᥥ࠿ࢀ࡚࠸ࡿࠋᅗ 3
࡟ࡣࠊᅗ 2 ࡟♧ࡋࡓ┠ᶆἼ࡜෌⌧Ἴ࡟㛵ࡍࡿ࿘Ἴᩘ
ᛂ⟅ゎᯒࢆᐇ᪋ࡋࠊኵࠎࡢࣇ࣮࢚ࣜࢫ࣌ࢡࢺࣝࡀᥥ
࠿ࢀ࡚࠸ࡿࠋ
100
㻌
┠ᶆἼ䚷㻺㻿
㻌
0
㻌
㻌 -100
0
50
100
150
200
250
300
㻌
(sec)
100
㻌
෌⌧Ἴ䚷㻺㻿
㻌
0
㻌
㻌 -100
0
50
100
150
200
250
300
(sec)
㻌
㻔㼍㻕㻌㻺㻿 ᡂศ㻌
100
㻌
┠ᶆἼ䚷㻱㼃
㻌
0
㻌
㻌 -100
0
50
100
150
200
250
300
㻌
(sec)
100
㻌
෌⌧Ἴ䚷㻱㼃
㻌
0
㻌
㻌 -100
0
50
100
150
200
250
300
㻌
(sec)
㻔㼎㻕㻌㻱㼃 ᡂศ㻌
ᅗ 㻞㻌 ༑຾Ἀᆅ㟈㻌
1000
1000
㻌
┠ᶆἼ㻌㻺㻿
෌⌧Ἴ㻌㻺㻿
෗┿ 㻝㻌㻞㍈ᆅ㟈Ἴ᣺ືྎ䠄ᨵⰋ๓䠅㻌
2
Acc.(cm/s )
2
Acc.(cm/s )
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
෗┿ 㻞㻌㻞㍈ᆅ㟈Ἴ᣺ືྎ䠄ᨵⰋᚋ䠅㻌
㻌
2
Acc.(cm/s )
2
Acc.(cm/s )
䠎䞉䠎㻌 ᐇ㦂ᴫせ㻌
ᮏᐇ㦂࡛ࡣࠊ༑຾Ἀᆅ㟈㸦K-NET Ɫᑠ∾ NS㸪EW
ᡂศ㸧
ࠊᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈㸦K-NET ྂᕝἼࠊ኱
㜰Ἴ NS㸪EW ᡂศ㸧ࢆ෗┿ 2 ࡟♧ࡍ 2 ㍈ᆅ㟈Ἴ᣺ື
ྎࢆ⏝࠸࡚෌⌧ࢆ⾜࠺ࠋᐇ㦂࡟⏝࠸ࡓ 3 Ἴࢆ᣺ືྎ
࡟ධຊࡍࡿሙྜࠊ᣺ືྎ࡟㛵ࡍࡿኚ఩ཬࡧ㏿ᗘ್ࡢ
ไ⣙ࡢࡓࡵ࡟ࠊప࿘Ἴᩘ 0.2Hz ௨ୗ࡟ᑐࡋࣁ࢖ࣃࢫ
ࣇ࢕ࣝࢱ࣮ฎ⌮ࢆ⾜ࡗ࡚࠸ࡿࠋࡇࡢἼᙧࢆᮏሗ࡛ࡣ
┠ᶆἼ࡜࿧ࡧࠊ᣺ືྎ࡛෌⌧ࡋࡓἼᙧࢆ෌⌧Ἴ࡜࿧
ࡪࠋ
㻌
䠏䠊㻌㛗࿘ᮇᆅ㟈ື䛾෌⌧ᐇ㦂⤖ᯝ㻌
ᅗ 1 ࡟ࡣࠊ༑຾Ἀᆅ㟈 K-NET Ɫᑠ∾Ἴ NS ᡂศࠊ
ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈 K-NET ྂᕝἼ EW ᡂศࠊ
K-NET ኱㜰Ἴ NS ᡂศࡢῶ⾶ᐃᩘ 5㸣ࡢ㏿ᗘᛂ⟅ࢫ
࣌ࢡࢺࣝࢆᥥ࠸࡚࠸ࡿࠋ
10
1
0.1
1
10
0.1
1
10
(Hz)
1000
┠ᶆἼ㻌㻱㼃
1
༑຾Ἀᆅ㟈㼗㻙㻺㻱㼀Ɫᑠ∾㻺㻿
ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈㻷㻙㻺㻱㼀ྂᕝ㻱㼃
ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈㻷㻙㻺㻱㼀኱㜰㻺㻿
1
(Hz)
10
ᅗ ㏿ᗘᛂ⟅ࢫ࣌ࢡࢺࣝ
10
1
0.1
24
10
1
0.1
0.1
ᅗ 1 ࡼࡾࠊ3 Ἴ࡜ࡶ 0.3Hz ௨ୗࡢప࿘Ἴᩘᖏᇦ࡟
෌⌧Ἴ㻌㻱㼃
100
F(iw) (cm/s)
100
0.01
0.1
1
(Hz)
1000
0.1
10
0.1
0.1
10
F(iw) (cm/s)
Sv (cm/s)
100
100
F(iw) (cm/s)
F(iw) (cm/s)
100
1
㻌 0.1
(Hz)
(Hz)
ᅗ 㻟㻌 ༑຾Ἀᆅ㟈䛾࿘Ἴᩘ≉ᛶ
1
10
10
Memoirs of National Institute of Technology, Akashi College, Japan No.57 (2015.2)
࡞࠾ࠊྂᕝἼ࡟࠾࠸࡚ࠊほグ㘓㸦ཎἼ㸧ࡢ᭱኱
㏿ᗘࡀ 95cm/s ࢆ♧ࡋ࡚࠾ࡾࠊ᣺ືྎࡢไ⣙᮲௳ࢆ㉸
㐣ࡋ࡚࠾ࡾࠊ0.5 ಸ࡟⦰ᑠࡋ෌⌧ᐇ㦂ࢆ⾜࠺ࠋࡲࡓࠊ
኱㜰Ἴ࡟࠾࠸࡚ࠊཎἼࡢ᭱኱ຍ㏿ᗘࡀ 7.26cm/s2 ࡜ᚤ
᣺ື࡛࠶ࡾࠊ2 ㍈ᆅ㟈Ἴ᣺ືྎ࡟࠾࠸࡚ࠊ෌⌧ᐇ㦂
ࢆ⾜ࡗ࡚࠸ࡿࡀࠊ௒ᚋࡢ」ྜච㟈࣭ไ㟈ᵓ㐀ࡢᶍᆺ
ᐇ㦂࡟ഛ࠼࡚ࠊᮏㄽ࡛ࡣࠊཎἼࡢ⣙ 8 ಸ࡟ᣑᖜࡋ෌
⌧ᐇ㦂ࢆ⾜ࡗ࡚࠸ࡿࠋ
ᅗ 2 ࡼࡾࠊ᭱኱ຍ㏿ᗘཬࡧ఩┦ࡣࠊ࡯ࡰ㢮ఝࡋ࡚
࠸ࡿࡇ࡜ࡀุࡿࠋᅗ 3 ࡼࡾࠊ0.2㹼1Hz ௜㏆ࡢ࿘Ἴᩘ
ᖏᇦ࡟࠾࠸࡚ࠊࡼ࠸୍⮴ࢆ♧ࡋ࡚࠸ࡿࡀࠊ30㹼40Hz
ࡢ㧗࿘Ἴᩘᖏᇦ࡟࠾࠸࡚ࠊࡸࡸ␗࡞ࡿ≉ᛶࢆ♧ࡋ࡚
࠸ࡿࠋࡇࢀࡣࠊ᣺ືྎࢆᵓᡂࡍࡿ஭ᆺࡢࣜࢽ࢔࣮࢞
࢖ࢻ㒊ศཬࡧຍ᣺ᶵࡢ㥑ື㒊ࡢᦶ᧿࡟ࡼࡗ࡚⏕ࡌ
ࡓࡶࡢ࡛࠶ࡿ࡜᥎ᐹࡋ࡚࠸ࡿࠋ
⾲ 1 ࡟ࠊ┠ᶆἼ࡜෌⌧Ἴࡢ᭱኱ຍ㏿ᗘཬࡧࡑࡢẚ
⋡ࢆ♧ࡋ࡚࠸ࡿࠋ⾲ 1 ࡼࡾࠊ෌⌧Ἴࡢ෌⌧ᛶࡢㄗᕪ
ࡣࠊ0.5㹼1.4㸣࡛࠶ࡾࠊ࡯ࡰ෌⌧࡛ࡁ࡚࠸ࡿ࡜ุ᩿
ࡋ࡚࠸ࡿࠋ
⾲ ┠ᶆἼ࡜෌⌧Ἴࡢ᭱኱ຍ㏿ᗘࡢẚ㍑
෌⌧Ἴ
᭱኱ຍ㏿ᗘ
᭱኱ຍ㏿ᗘ
(cm/s2)
(cm/s2)
Ɫᑠ∾ NS
86.62
87.87
1.014
Ɫᑠ∾ EW
72.87
72.54
0.995
160
2
Acc.(cm/s )
2
Acc.(cm/s )
0
0
40
80
(sec)
120
160
┠ᶆἼ䚷㻱㼃
2
Acc.(cm/s )
2
0
0
-60
120
160
(sec)
200
240
80
(sec)
120
160
෌⌧Ἴ䚷㻱㼃
2
Acc.(cm/s )
0
0
-60
160
(sec)
40
60
෌⌧Ἴ䚷㻺㻿
120
0
200
240
0
40
80
(sec)
120
160
㻔㼎㻕㻌 EW ᡂศ
ᅗ 㻡㻌 ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈䠄K-NET ኱㜰䠅
300
2
┠ᶆἼ㻌㻱㼃
ᅗ 6ࠊ7 ࡟ࡣࠊᅗ 4ࠊ5 ࡟♧ࡋࡓ┠ᶆἼ࡜෌⌧Ἴࡢ
ࣇ࣮࢚ࣜࢫ࣌ࢡࢺࣝࡀᥥ࠿ࢀ࡚࠸ࡿࠋ
0
-300
80
120
160
(sec)
200
240
2
෌⌧Ἴ㻌㻱㼃
0
-300
80
1000
100
100
F(iw) (cm/s)
300
1000
F(iw) (cm/s)
Acc.(cm/s )
┠ᶆἼ䚷㻺㻿
2
Acc.(cm/s )
120
㻔㼍㻕㻌 NS ᡂศ
㻔㼍㻕㻌NS ᡂศ
Acc.(cm/s )
80
(sec)
60
300
Acc.(cm/s )
40
෌⌧Ἴ㻌㻺㻿
-60
300
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
㻌
0
60
䠏䞉䠎㻌 ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈䛾෌⌧㻌
ᅗ 4ࠊ5 ࡟ࡣࠊᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈 K-NET ྂᕝ
Ἴࠊ኱㜰Ἴ࡟㛵ࡍࡿ┠ᶆἼ࡜෌⌧Ἴࡀᥥ࠿ࢀ࡚࠸ࡿࠋ
-300
80
0
෌⌧Ἴ/┠ᶆἼ
㻌
-300
80
┠ᶆἼ㻌㻺㻿
-60
┠ᶆἼ
༑຾Ἀᆅ㟈
60
10
1
0.1
120
160
(sec)
200
10
1
0.1
┠ᶆἼ㻌㻺㻿
240
0.01
0.1
1
10
(Hz)
㻔㼎㻕㻌EW ᡂศ
ᅗ 㻠㻌 ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈䠄K-NET ྂᕝ䠅
෌⌧Ἴ㻌㻺㻿
0.01
0.1
1
10
(Hz)
ᅗ 㻢 ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈䠄K-NET ྂᕝ䠅䛾
࿘Ἴᩘ≉ᛶ
25
明石工業高等専門学校研究紀要　第57号（平成27年2月）
100
100
F(iw) (cm/s)
1000
10
1
0.1
䠏䞉䠏㻌 ෌⌧Ἴ䛾㌶㊧㻌
ᅗ 8 ࡟ࡣࠊ3.1ࠊ3.2 ⠇࡛෌⌧ࡋࡓ༑຾Ἀᆅ㟈㸦K-NET
Ɫᑠ∾Ἴ㸧ࠊᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈㸦K-NET ྂᕝἼࠊ
኱㜰Ἴ㸧࡟࠾ࡅࡿ NSࠊEW ᡂศࡢኚ఩㌶㊧ࢆ♧ࡍࠋ
10
1
0.1
┠ᶆἼ㻌㻱㼃
0.01
෌⌧Ἴ㻌㻱㼃
1
10
0.1
1
(Hz)
10
120
60
60
(Hz)
ᅗ 㻢 ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈䠄K-NET ྂᕝ䠅䛾
࿘Ἴᩘ≉ᛶ䠄Continued䠅
1000
┠ᶆἼ㻌㻺㻿
1000
෌⌧Ἴ㻌㻺㻿
10
0
-60
-120
-120
100
F(iw) (cm/s)
100
F(iw) (cm/s)
120
0.1
40
0.01
0.01
10
0.1
1
(Hz)
10
(Hz)
1000
┠ᶆἼ㻌㻱㼃
1000
10
1
0.1
1
10
60
-40
-40
0
40
NS-Dis.(mm)
80
10
ᅗ ෌⌧Ἴࡢኚ఩㌶㊧
1
ᅗ 8 ࡼࡾࠊ෌⌧ࡋࡓ 3 Ἴ࡜ࡶ᣺ືྎࡢኚ఩᣺ᖜs
125mm ௨ෆ࡛෌⌧࡛ࡁ࡚࠸ࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡿࠋ
䠐䠊䜎䛸䜑㻌
ᮏㄽ࡛ࡣࠊ2 ㍈ᆅ㟈Ἴ᣺ືྎࢆ⏝࠸࡚ 2003 ᖺࡢ༑
຾Ἀᆅ㟈㸦K-NET Ɫᑠ∾Ἴ㸧ࠊ2011 ᖺࡢᮾ໭ᆅ᪉ኴ
ᖹὒἈᆅ㟈㸦K-NET ྂᕝἼࠊ኱㜰Ἴ㸧ࡢ 3 Ἴࢆ෌⌧
ࡋࡓࠋࡇࢀࡽࡢᆅ㟈ືࡢ෌⌧ᛶ࡟ࡘ࠸࡚ࠊ┠ᶆἼ࡜
෌⌧Ἴࡢ᭱኱ຍ㏿ᗘᛂ⟅್ཬࡧ࿘Ἴᩘ≉ᛶࡢほⅬ
࠿ࡽ᳨ドࡋࡓࠋ
࿘Ἴᩘ≉ᛶࡢほⅬ࠿ࡽ 30Hz ௨ୖࡢ㧗࿘Ἴᩘᖏᇦ
࡟࠾࠸࡚ⱝᖸ㐪࠸ࡀぢࡽࢀࡿࡀࠊᆅ㟈ືἼᙧ࠿ࡽぢ
ࡿ㝈ࡾࠊ༑ศ࡟෌⌧࡛ࡁ࡚࠸ࡿࠋ
௒ᚋࡣࠊࡇࢀࡽࡢ㛗࿘ᮇᆅ㟈ືࢆ⏝࠸ࡓ」ྜච㟈
ᵓ㐀ࠊไ㟈ᵓ㐀ࠊῶ㟈ᵓ㐀࡟㛵ࡍࡿ᣺ືᐇ㦂ࢆᐇ᪋
ࡍࡿணᐃ࡛࠶ࡿࠋࡇࡢ⤖ᯝ࡟ࡘ࠸࡚ࡣࠊ✏ࢆᨵࡵ࡚
ሗ࿌ࡋࡓ࠸ࠋ
0.01
0.1
-30
0
30
NS-Dis.(mm)
0
-80
-80
0.1
0.01
-120
-60
෌⌧Ἴ㻌㻱㼃
100
F(iw) (cm/s)
100
F(iw) (cm/s)
EW-Dis.(mm)
0.1
1
120
-60
.1(7኱㜰
80
0.1
-60
0
60
NS-Dis.(mm)
0
10
1
1
EW-Dis.(mm)
0.1
.1(7ྂᕝ
.1(7Ɫᑠ∾
0.01
EW-Dis.(mm)
F(iw) (cm/s)
1000
0.1
(Hz)
1
10
(Hz)
ᅗ 㻣 ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈䠄K-NET ኱㜰䠅䛾
࿘Ἴᩘ≉ᛶ
ᅗ 4ࠊ5 ࡼࡾࠊ᭱኱ຍ㏿ᗘཬࡧ఩┦ࡣࠊ࡯ࡰ㢮ఝ
ࡋ࡚࠸ࡿࡇ࡜ࡀุࡿࠋᅗ 6ࠊ7 ࡼࡾࠊ0.2㹼1Hz ௜㏆
ࡢ࿘Ἴᩘᖏᇦ࡟࠾࠸࡚ࠊࡼ࠸୍⮴ࢆ♧ࡋ࡚࠸ࡿࡀࠊ
30Hz ௨ୖࡢ㧗࿘Ἴᩘᖏᇦ࡟࠾࠸࡚ࠊࡸࡸ␗࡞ࡿ≉
ᛶࢆ♧ࡋ࡚࠸ࡿࠋ
⾲ 2 ࡟ࠊ┠ᶆἼ࡜෌⌧Ἴࡢ᭱኱ຍ㏿ᗘཬࡧࡑࡢẚ
⋡ࢆ♧ࡋ࡚࠸ࡿࠋ⾲ 2 ࡼࡾࠊ෌⌧Ἴࡢ෌⌧ᛶࡢㄗᕪ
ࡣࠊ0.7㹼7㸣࡛࠶ࡾࠊ኱㜰Ἴ࡟࠾࠸࡚ࡣࠊ┠ᶆἼ࡜
෌⌧Ἴ࡟ᑡࡋㄗᕪࡀ⏕ࡌ࡚࠸ࡿࡼ࠺࡟ᛮ࠼ࡿࠋ
⾲ ┠ᶆἼ࡜෌⌧Ἴࡢ᭱኱ຍ㏿ᗘࡢẚ㍑
ᮾ໭ᆅ᪉
ኴᖹὒἈ
ᆅ㟈
┠ᶆἼ
෌⌧Ἴ
᭱኱ຍ㏿ᗘ
᭱኱ຍ㏿ᗘ
(cm/s2)
(cm/s2)
ྂᕝ NS
221.83
223.96
1.010
ྂᕝ EW
285.56
287.69
1.007
኱㜰 NS
55.91
59.24
1.060
኱㜰 EW
52.15
55.79
1.070
ཧ⪃ᩥ⊩
1) 㸦 ⊂ 㸧㜵 ⅏ ⛉ Ꮫ ◊ ✲ ᡤ 㸸 ᆅ 㟈ほ ࢩ ࢫ ࢸ ࣒
K-NETࠊhttp://www.kyoshin.bosai.go.jp/kyoshin
2) ୰ᕝ⫕㸸᣺ືྎࢆ⏝࠸ࡓ㛗࿘ᮇᆅ㟈ືࡢ෌⌧ᛶ
࡟㛵ࡍࡿ᳨ド̺ᮾ໭ᆅ᪉ኴᖹὒἈ㸦2011㸧ࠊ༑
຾Ἀ㸦2003㸧ཬࡧ⣖ఀ༙ᓥ༡ᮾἈ㸦2004㸧ᆅ㟈
ࡢ෌⌧̺㸪᫂▼㧗ᑓ◊✲⣖せ㸪➨ 55 ྕ㸪pp.22~25ࠊ
㸦2013㸧
෌⌧Ἴ/┠ᶆἼ
26

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