東北地域災害科学研究45第59巻（2023）」 ᩘࡢ ࢜࢖ ࣝࢱ ࣥࢡ⩌ ࡟స ⏝ࡍࡿ ὠἼ Ⲵ㔜 ࡢỈ ⌮ᶍᆺ ᐇ㦂 ⛅ ⏣ ᕤ ᴗ 㧗 ➼ ᑓ 㛛 Ꮫ ᰯ  ᑎ ᮏ  ᑦ ྐ ࣭ ୎ ጾ ࣭ ᳜ ᯇ  ᗣ⛅ ⏣ ┴ ❧ ኱ Ꮫ  ᑠ ᖭ  ᫛ᙪ1. ◊ ✲ ࡢ ⫼ ᬒ ࡜ ┠ ⓗ2011 ᖺ 3 ᭶ 11 ᪥ᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈࡟కࡗ࡚Ⓨ⏕ࡋࡓ኱ὠἼ࡟ࡼࡗ࡚㸪ἢᓊ㒊࡟ᘓタࡉࢀ࡚࠸ࡓከᩘࡢ࢜࢖ࣝࢱࣥࢡ࡟⏒኱࡞⿕ᐖࡀⓎ⏕ࡋࡓࠋࡲࡓ㸪ὶฟࡋࡓ࢜࢖ࣝࡣⅆ⅏࡞࡝ࡢ஧ḟ⿕ᐖࢆᘬࡁ㉳ࡇࡋࡓࠋࡇࡢࡼ࠺࡟㸪ἢᓊ㒊ࡢ࢜࢖ࣝࢱࣥࢡࡀὠἼ࡟ࡼࡗ࡚ᔂቯࡍࡿ࡜㸪♫఍࣭⤒῭࡟ᴟࡵ࡚኱ࡁ࡞ᙳ㡪ࢆཬࡰࡍࠋᮾ༡ᾏᆅ㟈࡞࡝ࡢⓎ⏕ࡀ༴᝹ࡉࢀ࡚࠸ࡿ⌧ᅾ㸪࢜࢖ࣝࢱࣥࢡࡢὠἼᑐ⟇ࡣᛴົࡢㄢ㢟࡛࠶ࡿࠋᮾ໭ᆅ᪉ኴᖹὒἈᆅ㟈௨㝆㸪ࡑࡢ⿕ᐖࡢつᶍ࡜༳㇟ࡀ኱ࡁ࠿ࡗࡓࡇ࡜࡛㸪ᘓ⠏≀࡟ᑐࡍࡿὠἼⲴ㔜ࡀὀ┠ࡉࢀ㸪◊✲ࡀቑ࠼ጞࡵ࡚࠸ࡿࠋ᪥ᮏᘓ⠏Ꮫ఍ࡢࠕᘓ⠏≀Ⲵ㔜ᣦ㔪࣭ྠゎㄝࠖ1) ௨ୗ,ࠕⲴ㔜ᣦ㔪ࠖ࡜⛠ࡍ ࡟ࡶ 2015 ᖺࡢᨵᐃ࡟ࡼࡾ㸪ὠἼⲴ㔜ࡢ❶ࡀ┒ࡾ㎸ࡲࢀࡓࠋࡋ࠿ࡋ㸪୍⯡ⓗ࡞▴ᙧᵓ㐀≀࡟ᑐࡋ࡚㸪ືⓗ࡞Ⲵ㔜ࢆ➼౯㟼ⓗⲴ㔜࡟⨨ࡁ᥮࠼ࡓὠἼⲴ㔜ࡢ⟬ᐃᘧࢆ୚࠼࡚࠸ࡿࡶࡢࡢ㸪࢜࢖ࣝࢱࣥࢡࡢࡼ࠺࡞෇⟄ᙧᵓ㐀≀࡟ᑐࡋ࡚ࡣつᐃࡉࢀ࡚࠸࡞࠸ࠋࡋࡓࡀࡗ࡚㸪࢜࢖ࣝࢱࣥࢡ࡟ᑐࡋ࡚ྜ⌮ⓗ࡞⪏ὠἼタィἲࢆ☜❧ࡍࡿࡓࡵ࡟㸪෇⟄ᙧᵓ㐀≀࡟స⏝ࡍࡿὠἼⲴ㔜ࢆ㐺ษ࡟ホ౯ࡍࡿᚲせࡀ࠶ࡿࠋࡲࡓ㸪▼Ἔഛ⵳ᇶᆅ࡛ࡣ」ᩘࡢ࢜࢖ࣝࢱࣥࢡࡀᘓタࡉࢀࡿࡓࡵ㸪ὠἼⲴ㔜ࡢホ౯࡟࠾࠸࡚ࡣ┦஫స⏝ࡢᙳ㡪ࢆ⪃៖ࡍࡿᚲせࡀ࠶ࡾ㸪ࡑࡢᙳ㡪ࢆ㋃ࡲ࠼ࡓୖ࡛࢜࢖ࣝࢱࣥࢡ⩌࡟స⏝ࡍࡿὠἼἼᅽ࣭Ἴຊࡢ≉ᛶࢆ᫂ࡽ࠿࡟ࡋ㸪᭱㐺࡞⪏ὠἼタィࢆ☜❧ࡍࡿࡇ࡜ࡀ㔜せ࡛࠶ࡿࠋࡑࡢࡓࡵᮏ◊✲࡛ࡣ㸪ἢᓊ㒊࡟ᘓタࡉࢀࡿ㗰〇࢜࢖ࣝࢱࣥࢡ⩌ࢆ᝿ᐃࡋࡓ Ỉ⌮ᐇ㦂ࢆ⾜࠸㸪ࡑࡢᐇ㦂⤖ᯝ࡟ᇶ࡙࠸࡚㸪 ࢱࣥࢡ⩌ࡢ㓄⨨ࣃࢱ࣮ࣥࡀὠἼⲴ㔜࡟ཬࡰࡍᙳ㡪ࢆᢕᥱࡋ㸪㐺ษ࡞㓄⨨ࢆホ౯᪉ἲࡢࡓࡵࡢᇶ♏ⓗ▱ぢࢆᚓࡿࡇ࡜ࢆ┠ⓗ࡜ࡍࡿࠋ2. Ỉ ⌮ ᶍ ᆺ ᐇ 㦂 ࡢ ᴫ せ
2.1 ᐇ 㦂 Ỉ ㊰Ỉ⌮ᶍᆺᐇ㦂࡟ࡣ⛅⏣ᕤᴗ㧗➼ᑓ㛛Ꮫᰯࡀᡤ᭷ࡍࡿᐇ㦂Ỉ㊰ࢆ౑⏝ࡍࡿࠋᐇ㦂Ỉ㊰ࡢᴫせࢆᅗ 1㸪෗┿ 1 ࡟♧ࡍࠋỈ㊰ࡢ඲㛗ࡣ⣙ 15 m㸪᩿㠃ᙧ≧ࡣ㛗᪉ᙧ࡛࠶ࡾ㸪Ỉ㊰ෆἲᖜ 0.6 m㸪㧗
ࡉ 0.8 m ࡛࠶ࡿࠋ㈓Ỉᵴ࡟୍ᐃ㔞ࡢỈࢆ⁀ࡵ㸪㐽Ỉቨࢆ▐㛫ⓗ࡟㛤ᨺࡍࡿࡇ࡜࡛ὠἼࡢᢲࡋἼ
ࢆ෌⌧ࡍࡿࠋᶍᆺࡢ఩⨨ࡣᅗ 1 ࡟♧ࡍ㏻ࡾ㸪ὶධཱྀ࡛㉳ࡇࡿ஘ࢀࡀῶᑡࡋጞࡵ㸪཯ᑕἼࡀ฿㐩ࡍࡿ᫬㛫ࡀ༑ศ࡟ྲྀࢀࡿ㸪㐽Ỉቨ࠿ࡽ 6.5 m㸪ᚋ᪉ࡢᾘἼ⿦⨨ࡼࡾ 3.5 m ࡜ࡋࡓࠋ2.2 ᶍ ᆺ ᴫ せᮏ◊✲࡛ࡣ㸪෇⟄ᙧࡢ୰ᆺ࢜࢖ࣝࢱࣥࢡࢆᑐ㇟࡜ࡋ㸪ᶍᆺࢆ༢⊂࡛㓄⨨ࡋࡓࡶࡢ(༢Ჷ)࠾ࡼ
ࡧ࿘㎶࡟ྠࡌᑍἲࡢࢲ࣑࣮ᶍᆺ(෗┿  E ཧ↷)ࢆ 1㹼2 Ჷ㓄⨨ࡋࡓࡶࡢ(㐃Ჷ)ࡢᐇ㦂ࢆ⾜࠺ࠋᗄ*Hydraulic model tests of tsunami force acting on oil tanks by Naofumi Teramoto, Wei Ding, Yasushi Uematsu
and Akihiko Obata46

ᅗ ᐇ㦂Ỉ㊰ᴫせ෗┿ ᐇ㦂Ỉ㊰(a)(b) ࢲ࣑࣮ᶍᆺᐃ⏝ᶍᆺ෗┿  ᐇ㦂ᶍᆺ

ᅗ 2 ἼᅽᐃⅬࡢ㓄⨨ఱᏛⓗ⦰ᑻ⋡ࡣߣ௅ =1/250 ࡜ࡋ㸪ᶍᆺࡢእᚄࡣ 80 mm㸪㧗ࡉࡣ 80 mm ࡜ࡋࡓࠋᶍᆺࡢ఩⨨ࡣὶධཱྀ࡛㉳ࡇࡿ஘ࢀࡀῶᑡࡋጞࡵ㸪཯ᑕἼࡀ฿㐩ࡍࡿ᫬㛫ࡀ༑ศ࡟ྲྀࢀࡿ㸪㐽Ỉቨ࠿ࡽ 6.5 m㸪ᚋ᪉ࡢᾘἼ⿦⨨ࡼࡾ 3.5 m ࡜ࡋࡓࠋᶍᆺࡢ఩⨨ࢆᅗ 1 ࡟♧ࡍࠋὶ㏿ィ࡜Ἴ㧗ィࡣᶍᆺ๓ᚋࡢ್ࢆᐃࡍࡿࡓࡵ࡟タ⨨ࡍࡿࡀ㸪ィჾࡢࣇ࣮࣒ࣞ࡞࡝࡟ࡼࡾ㸪Ἴ࡟஘ࢀࡀ⏕ࡌࡿࡓࡵ㸪ᶍᆺ఩⨨࠿ࡽᕥྑ࡟ࡎࡽࡋ࡚タ⨨ࡋࡓࠋὶ㏿ィࡣᶍᆺ୰ኸ࠿ࡽ๓᪉࡬ 207 mm㸪ᚋ᪉࡬
273 mm ࡢ఩⨨࡜ࡋࡓࠋἼ㧗ィࡣᶍᆺ୰ኸ࠿ࡽ๓ᚋ 110 mm ࡢ఩⨨࡜ࡋࡓࠋὶ㏿ィ㸪Ἴ㧗ィ㸪ඹ࡟ᕥྑ᪉ྥࡣᶍᆺ୰ኸ࠿ࡽ 150 mm㸪ቨ㠃࠿ࡽ 150 mm ࡢ఩⨨࡜ࡋࡓࠋ
2.3ᐃ᪉ἲᶍᆺ㸪ྛᐃჾලࡢᐃ఩⨨ࢆᅗ 3 ࡟♧ࡍࠋᶍᆺ๓ᚋࡢ್ࢆ

ᐃࡍࡿࡓࡵ࡟ࣉࣟ࣌ࣛᘧὶ㏿ィ࡜ᐜ㔞ᘧἼ㧗ィࢆタ⨨ࡋࡓࠋ࡞࠾㸪Ἴ࡟஘ࢀࡀ⏕ࡌࡿࡓࡵ㸪ὶ㏿ィ࠾ࡼࡧἼ㧗ィࡣᶍᆺ఩⨨47࠿ࡽᕥྑ࡟ࡎࡽࡋ࡚タ⨨ࡋࡓࠋᐃ⏝ᶍᆺ࡟ࡣᶍᆺࡢ⾲㠃࡟ᅽຊࢭࣥࢧ࣮ࢆ 18 ࣨᡤタ⨨ࡋࡓࠋタ⨨ಶᡤࢆᅗ 2 ࡟♧ࡍࠋࡲࡓᶍᆺࡢᗏ㒊࠿ࡽࡢ㧗ࡉࡀ 10 mm㸪30mm㸪50mm ࡢ఩⨨࡟㸪∦ഃ 180 ࡢ⠊ᅖ࡟ࡑࢀࡒࢀ 7 Ⅼ㸪7Ⅼ㸪4 Ⅼタ⨨ࡋࡓࠋ

ᅗ3ᅗ 4 ὠἼຊ

ᐃᶵᲔࡢ㓄⨨

ᐃ᪉ἲὠἼࡢ኱ࡁࡉࡣ㈓Ỉᵴࡢ㈓Ỉ㧗ࡉ hw ࢆኚ໬ࡉࡏࡿࡇ࡜࡟ࡼࡗ࡚ㄪᩚࡍࡿࠋᮏᐇ㦂࡛ࡣ㈓Ỉ
㧗ࡉ hw = 140mm, 180mm ࡢ 2 ✀㢮࡜ࡋࡓࠋὠἼἼຊ
ὠἼἼຊᐃ࡟ࡣ∦ᣢࡕࡢ㗰ᯈࢆ⏝࠸ࡿࠋᅗ 4 ࡟ᐃ᪉ἲࢆ♧ࡍࠋඛ➃࡟ᶍᆺࢆྲྀࡾ௜ࡅࡓ㗰ᯈࢆᯫྎ࠿ࡽྞࡿࡋ㸪Ⲵ㔜ࡀస⏝ࡋࡓ࡜

ࡁࡢ 2 Ⅼࡢ᭤ࡆࡦࡎࡳ ε ࢆ㗰ᯈ࡟㈞ࡾ௜ࡅࡓࡦࡎࡳࢤ࣮ࢪ࠿ࡽィࡍࡿࠋᚓࡽࢀࡓ᭤ࡆ࣮࣓ࣔࣥࢺ໙㓄࠿ࡽࡏࢇ᩿ຊࢆ⟬ฟࡋ㸪ࡇࢀࢆᶍᆺ࡟స⏝ࡍࡿὠἼἼຊ࡜ࡍࡿࠋ࡞࠾㸪ᐃ࡟࠶ࡓࡗ

࡚ࡣ㸪ὠἼస⏝᫬ࡢ㗰ᯈࡢࡦࡎࡳ࡜ᶍᆺࡢᅇ㌿࡟ࡼࡗ࡚ᶍᆺᗏ㒊ศ࡜ᗋ࡜ࡢ⾪✺ࢆ㜵ࡄࡓࡵ㸪ᶍᆺ࡜Ỉ㊰ᗋ࡜ࡢ㛫࡟ 5 mm ࢡࣜ࢔ࣛࣥࢫࢆタࡅࡓࠋ(a) Case2㸦2 Ჷ㓄⨨㸧
ᅗ5(b) Case3T
㸦3 Ჷ୕ゅᙧ㓄⨨㸧㐃Ჷ㓄⨨ࢣ࣮ࢫ(c) Case3L㸦3 Ჷ┤⥺㓄⨨㸧

48ᶍᆺࡢ㓄⨨ࣃࢱ࣮ࣥࢆᅗ 5 ࡟♧ࡍࠋ㓄⨨ࣃࢱ࣮ࣥࡣ㸪༢Ჷ(Caee1)㸪2 Ჷ(Case2)㸪3 Ჷࢆ୕ゅᙧ࡟㓄⨨(Case3T)㸪3 Ჷࢆ┤ิ࡟㓄⨨(Case3L)ࡢ 4 ࢣ࣮ࢫ࡜ࡋࡓࠋࡇࡇ࡛㸪ᅗ୰ࡢ S ࡣ㞄Ჷ㛫㝸㸪D ࡣࢱࣥࢡࡢ┤ᚄ㸪β ࡣྛ㓄⨨ࡢᇶ‽⥺࡟ᑐࡋ࡚ࡢὠἼධᑕ᪉ྥ࡛࠶ࡿࠋ㞄Ჷ㛫㝸ࡣᾘ㜵ἲ࡟
ᇶ࡙ࡁ S/D = 0.25, 0.5, 1.0 ࡜ࡋࡓࠋᐇ㦂ࢆ⾜ࡗࡓࢣ࣮ࢫࡢ୍ぴࢆ⾲ 1 ࡟♧ࡍࠋྛࢣ࣮ࢫࡑࢀࡒࢀ
5 ᅇࡎࡘᐇ㦂ࢆ⾜࠸㸪࢔ࣥࢧࣥࣈࣝᖹᆒࡋࡓ್ࢆ
ࡶ 100 Hz㸪ᐃ್࡜ࡋࡓࠋࢧࣥࣉࣜࣥࢢ࿘Ἴᩘࡣ࠸ࡎࢀᐃ᫬㛫 T ࡣ⣙ 60 ⛊࡛࠶ࡿࠋ⾲ 1 ᐇ㦂ࢣ࣮ࢫ୍ぴ (ྛࢣ࣮ࢫ࡜ࡶ hw = 140mm, hw = 180mm ࢆᐇ᪋)Case 1Case 2
Case 3T
Case 3LS/D
̿
0.25
0.5
1.0
0.25
0.5
1.0
0.25
0.5
1.0β(۬)000000303030303030606060606060

9090909090903. Ỉ ⌮ ᶍ ᆺ ᐇ 㦂 ࡢ ⤖ ᯝ ࡜ ⪃ᐹ
3.1 ὠ Ἴ ὶ ㏿ ࠾ ࡼ ࡧ Ἴ 㧗༢Ჷ(Case1)㸪㈓Ỉ㧗ࡉ hw = 180mm ᫬ࡢὶ㏿࡜Ἴ㧗ࡢᐃ⤖ᯝࢆᅗ 6 ࡟♧ࡍࠋᶍᆺ๓㠃࡟⁫␃ࡀ⏕ࡌࡿࡓࡵ㸪ᶍᆺ๓᪉ࡢὶ㏿ࡣ᭱኱್࡟㐩ࡋࡓᚋ㸪ᛴ⃭࡟ῶ㏿ࡋ࡚࠸ࡿࡢ࡟ᑐࡋ㸪Ἴ㧗ࡣὠἼ฿㐩ᚋ࡟ᚎࠎ࡟ୖ᪼ࡍࡿഴྥࡀぢࡽࢀࡓࠋ

50

ᶍᆺ๓᪉
ᶍᆺᚋ᪉

1

0.50010(a) ὶ㏿

2030
᫬้ࠉ(s)

Ἴ㧗㸦mm/s㸧ὶ㏿㸦m/s㸧

1.5

ᶍᆺ๓᪉
ᶍᆺᚋ᪉

40
30
20
1000

ᅗ 6 ὶ㏿࡜Ἴ㧗ࡢ᫬้Ṕኚ໬(Case 1)

10(b) Ἴ㧗

2030
᫬้ࠉ(s)

493.2 ὠ Ἴ Ἴ ຊ
ᅗ 7 ࡟㸪㈓Ỉ㧗ࡉ hw = 140mm , S/D = 0.5 ᫬࡟࠾ࡅࡿ Case2㸪Case3T ࠾ࡼࡧ Case3L ࡢྛᐇ㦂ࢣ࣮ࢫࡢ᭱኱Ἴຊ F ࢆ㸪Case1(༢Ჷ㓄⨨᫬)࡟࠾ࡅࡿ᭱኱Ἴຊ࡛㝖ࡋ࡚↓ḟඖ໬ࡋࡓ್㸦᭱኱Ἴຊẚ㸧ࢆ♧ࡍࠋCase 2 ࡢὠἼධᑕゅ β = 0°, β = 30°ࡢሙྜ㸪᭱኱Ἴຊẚࡀ 1 ࢆୗᅇࡗࡓࡀ㸪ࡇࢀࡣἼࡀࢲ࣑࣮ᶍᆺഃ㠃࡛๤㞳ࡍࡿࡇ࡜࡛㸪ὠἼඛ➃㒊ࡀᑐ㇟ᶍᆺ࡟┤᥋⾪✺ࡋ࡞࠸ࡓࡵ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋࡇࢀࢆ㐃Ჷ㓄⨨࡟࠾ࡅࡿࠕࢩ࣮ ࣝࢻຠᯝ(ᅗ 8)ࠖ࡜࿧ࡪࠋ୍᪉㸪Case2 ࡢ β = 60
㹼90°ࡢἼຊࡣ᭱኱Ἴຊẚࡀ 1 ࢆୖᅇࡗࡓࡀ㸪ࡇࢀࡣᶍᆺࡀὠἼࢆሖࡁṆࡵࡿࡇ࡜࡟ࡼࡾ(ᅗ 8)㸪
ᶍᆺ๓᪉ࡢἼ㧗ࡀୖ᪼ࡋࡓࡇ࡜ࡀᙳ㡪ࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋྠᵝ࡟㸪୕ゅᙧ Case3T ࡢ β =0~30°࡛ࡣࢩ࣮ࣝࢻຠᯝ࡟ࡼࡾἼຊࡀῶᑡࡋ㸪Case3T㸦β = 60°㸧࡜ Case3L㸦β = 90°㸧࡛ࡣሖࡁṆࡵ࡟ࡼࡾἼຊࡀቑ኱ࡋ㸪≉࡟ Case3L ࡢሙྜࡢἼຊࡣ⣙ 1.8 ಸ࡟ቑຍࡋࡓࠋ

ࢩ࣮ࣝࢻຠᯝ
ᅗ 7 ᭱኱ἼຊẚሖࡁṆࡵ

ᅗ 8 ࢩ࣮ࣝࢻຠᯝ࡜ሖࡁṆࡵࡢᴫせ3.3 ὠ Ἴ Ἴ ᅽCase2㸪Case3T㸪Case3L ࡢ࠺ࡕ㸪Case1 ࡜ẚ࡭࡚Ἴຊࡀῶᑡࡋࡓࢣ࣮ࢫ࠾ࡼࡧቑຍࡋࡓࢣ࣮ࢫ࡟࠾ࡅࡿἼᅽศᕸ(ᶍᆺ㧗ࡉ 10mm ࡢ఩⨨)ࡢẚ㍑ࢆ ᅗ 9(a),(b)࠾ࡼࡧ ᅗ 9(c),(d)࡟♧ࡍࠋࡇࡇ࡛ࠊ
ᅗ୰ࡢⷧ࠸Ⰽࡢ⥺ࡀ༢ᲷࡢἼᅽศᕸࠊ㯮Ⰽࡢ⥺ࡀ㐃ᲷࡢἼᅽศᕸࢆ♧ࡍࠋ ᅗ 9 (a)ࡢ Case2㸪β =0°ࡢἼᅽศᕸࢆぢࡿ࡜ࠊᶍᆺ๓㠃㸦0°㸧ࡢἼᅽࡀ Case1 ࡟ẚ࡭࡚኱ࡁࡃῶᑡࡋ࡚࠸ࡿࡢ࡟ᑐࡋࠊ
ᶍᆺഃ㠃㸦s30°࠾ࡼࡧs60°㸧ࡢἼᅽࡀቑຍࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿࠋ ᅗ 9 (b) ࡢ Case2㸪β = 30°ࡢ㓄⨨ࣃࢱ࣮࡛ࣥࡶ㸪ᶍᆺ๓㠃㸦0°㸧ࡢἼᅽࡣ༢Ჷ㓄⨨᫬࡟ẚ࡭࡚ῶᑡࡋ࡚࠸ࡿⅬࡣྠᵝ࡛࠶ࡗࡓࠋᶍᆺഃ㠃(30°࠾ࡼࡧ 60°)ࡢἼᅽ࡟ࡘ࠸࡚ࡣ㸪ࢲ࣑࣮ᶍᆺࡢ㓄⨨ࡉࢀ࡚࠸ࡿ᪉ྥࡢἼᅽࡀ
ᑠࡉࡃ࡞ࡗࡓࡀࠊࡑࢀ࡟ࡼࡗ࡚ࡣࡌ࠿ࢀࡓἼ࡟ࡼࡗ࡚㓄⨨ࡉࢀ࡚࠸࡞࠸᪉ྥࡢᶍᆺഃ㠃(-60°)ࡢ
Ἴᅽࡣ㏫࡟ୖ᪼ࡋࡓࠋ
୍᪉㸪Ἴຊࡀቑຍࡋࡓ Case2㸪β = 90°(ᅗ 9(c))࠾ࡼࡧ Case3L㸪β = 90°(ᅗ 9(d))ࡢࢣ࣮ࢫ࡟࠾ࡅ
ࡿἼᅽศᕸࢆぢࡿ࡜㸪࠸ࡎࢀࡶ Case1 ࡜ࡢἼᅽ࡜ẚ࡭඲యⓗ࡟኱ࡁ࠸ഴྥࢆ♧ࡋࡓࡀ㸪ᶍᆺ๓
㠃㸦0°㸧ࡢἼᅽࡣ࡯ࡰྠࡌ್࡜࡞ࡗ࡚࠸ࡿࡢ࡟ᑐࡋ㸪ᶍᆺഃ㠃(s30°࠾ࡼࡧs60°)ࡢἼᅽࡣ኱ࡁ
ࡃ࡞ࡿഴྥ࡜࡞ࡗࡓࠋࡑࡢࡓࡵࠊἼຊ࡟ࡣὠἼ㐍⾜᪉ྥ࡟ᑐࡋ࡚ᶍᆺ๓㠃ࡢἼᅽࡼࡾࡶᶍᆺഃ
㠃࡟࠿࠿ࡿἼᅽࡀ኱ࡁࡃᙳ㡪ࢆཬࡰࡋ࡚࠸ࡿྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࠋ

50

1.21

ഀѻʤN3DʥഀѻʤN3Dʥ

1.2
0.8
0.6
0.4
0.2
0-150-120 -90 -60 -30 0

࿊౫

10.8
0.6
0.4
0.2
030 60 90 120 150

ୱ౫ ଎ఈҒ஖ʤ˅ʥ

࿊౫

1.2

1.2

11

0.6
0.4
0.2
0-150-120 -90 -60 -30 030 60 90 120 150

ୱ౫ ଎ఈҒ஖ʤ˅ʥ(b) Case2 㸦 β = 30°㸧ഀѻʤN3DʥഀѻʤN3Dʥ(a) Case2 㸦 β = 0°㸧

0.8-150-120 -90 -60 -30 0

0.8
0.6
0.4
0.2
030 60 90 120 150

ୱ౫ ଎ఈҒ஖ʤ˅ʥ-150-120 -90 -60 -30 030 60 90 120 150࿊౫ୱ౫ ଎ఈҒ஖ʤ˅ʥ(c) Case2 㸦 β = 90°㸧(d) Case3L 㸦 β = 90°㸧
ᅗ 9 ྛ㓄⨨ࣃࢱ࣮ࣥ࡟࠾ࡅࡿἼᅽศᕸ 㸦6' 㸪KZ PP㸪ᶍᆺ㧗ࡉ PP ࡢ఩⨨㸧
࿊౫4. ⤖ ㄽᮏ◊✲࡛ࡣ㓄⨨ࣃࢱ࣮ࣥࡢ␗࡞ࡿ෇⟄ᙧ࢜࢖ࣝࢱࣥࢡ⩌࡟స⏝ࡍࡿὠἼἼຊ࠾ࡼࡧἼᅽࢆ᳨ウࡍࡿࡓࡵ࡟Ỉ㊰ᐇ㦂ࢆ⾜ࡗࡓࠋỈ㊰ᐇ㦂࡟ࡼࡿ㓄⨨࣭Ჷᩘࡀ୚࠼ࡿᙳ㡪ࢆ᳨ウࡋࡓ⤖ᯝࠊ༢Ჷ㓄⨨᫬ࡢ᭱኱Ἴᅽ࡜ẚ㍑ࡋࡓ
ሙྜࠊ㐃Ჷ㓄⨨᫬ࡢ᭱኱ἼຊࡣὠἼධᑕゅࡢ㐪࠸࡟ࡼࡾ㸪ቑຍ࣭ῶᑡࡢ࠸ࡎࢀࡢሙྜࡶ࠶ࡿࡇ࡜ࠊ≉࡟ 2 Ჷ㓄⨨ࡢሙྜࡣࠊධᑕゅ 45rࡀࡑࡢቃ⏺࡜࡞ࡗ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡗࡓࠋࡲࡓࠊἼຊࡢቑῶ࡟ࡣ඲యⓗ࡞Ἴᅽࡢ኱ࡁࡉࡔࡅ࡛࡞ࡃᐃᶍᆺഃ㠃ࡢἼᅽᕪࡢᙳ㡪ࡶ㛵ಀࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿࠋㅰ㎡ᮏ◊✲ࡣ๓⏣グᛕᕤᏛ᣺⯆㈈ᅋ ௧࿴ 3 ᖺᗘ◊✲ຓᡂࠕᾏ὾ᆅᖏ࡟ᘓࡘ࢜࢖ࣝࢱࣥࢡ⩌ࡢ┦஫ᖸ΅ࢆ⪃៖ࡋࡓὠἼⲴ㔜࡜⪏ὠἼタィࠖ(2021 ᖺ㸪◊✲௦⾲⪅㸸ᑎᮏᑦྐ)㸪࠾ࡼࡧ⛉◊㈝◊✲άືࢫࢱ࣮ࢺᨭ᥼ࠕ࢜࢖ࣝࢱࣥࢡ⩌࡟స⏝ࡍࡿὠἼⲴ㔜࠾ࡼࡧ⪏ὠἼタィ࡟㛵ࡍࡿ◊✲ࠖ(2021ᖺ㸪◊✲௦⾲⪅㸸୎ጾ) ࡢ୍㒊࡟ࡼࡿࡶࡢ࡛࠶ࡿࠋࡇࡇ࡟グࡋ࡚ㅰពࢆ⾲ࡋࡲࡍࠋཧ⪃ᩥ⊩
1 ᪥ᮏᘓ⠏Ꮫ఍㸸ᘓ⠏≀Ⲵ㔜ᣦ㔪࣭ྠゎㄝ㸪2015
2 Akihiko OBATA, Naofumi TERAMOTO, Hiroki KAMEYA, Yuki TAKADATE, Kosuke SATO,Yasushi UEMATSU: Experimental Investigation of Tsunami Loads on a Group of Cylindrical Oil StorageTanks, Advanced experimental mechanics, Vol.7, pp.155-161, 2022.8