ᮾᛴᘓタᢏ⾡◊✲ᡤሗ No.41
東急建設技術研究所報No.41

U.D.C 699.83

U.D.C 699.83

 ᒇୖ┠㞃ࡋቨ࡟స⏝ࡍࡿࣆ࣮ࢡ㢼ຊಀᩘ࡟㛵ࡍࡿ◊✲
屋上目隠し壁に作用するピーク風力係数に関する研究本田㸨㸨＊＊＊ᏹṊ ᰩ⏣ຍ⸨宏武ᮏ⏣
栗田剛 ＊ ๛加藤信男ಙ⏨㸨㸨せ ⣙㸸  ᘓ≀ࡢᒇୖእ࿘㒊࡟ࡣ, ᬒほୖࡢ㜼ᐖせᅉ࡜࡞ࡿタഛᶵჾࡢ㟢ฟࢆ㜵ࡄ࡜࡜ࡶ࡟, ࿘㎶ᆅ༊ࡢࢫ࢝࢖ࣛ࢖ࣥᙧᡂࢆ┠ⓗ࡜ࡋ࡚┠㞃ࡋቨࢆタ⨨ࡍࡿࡇ࡜ࡀከ࠸ࠋᒇୖ┠㞃ࡋቨ࡟స⏝ࡍࡿࣆ࣮ࢡ㢼ຊಀᩘ࡟ࡘ࠸࡚ᗄࡘ࠿ࡢ◊✲౛ࡀሗ࿌ࡉࢀ࡚࠸ࡿࡀ, ┠㞃ࡋቨࡢ㧗ࡉ᪉ྥ࣭ᖜ᪉ྥࡢࣆ࣮ࢡ㢼ຊಀᩘศᕸࡸᘓ≀➃㒊࠿ࡽࢭࢵࢺࣂࢵࢡࡋࡓ఩⨨࡟࠶ࡿ┠㞃ࡋቨࡢ㢼ຊ≉ᛶ࡟ࡘ࠸࡚ࡣ᫂ࡽ
࠿࡟ࡉࢀ࡚࠸࡞࠸ࠋࡑࡇ࡛ᮏ◊✲࡛ࡣ, ᘓ≀➃㒊࠿ࡽࡢ㞳㝸㊥㞳ࢆࣃ࣓࣮ࣛࢱ࡜ࡋࡓᒇୖ┠㞃ࡋቨࡢ㢼ᅽᐇ㦂ࢆ⾜࠸, ┠㞃ࡋቨࡢࣆ࣮ࢡ㢼ຊಀᩘศᕸ࠾ࡼࡧ㞳㝸㊥㞳࡜ࣆ࣮ࢡ㢼ຊಀᩘࡢ㛵ಀ࡟ࡘ࠸᳨࡚ウࡋࡓࠋࡑࡢ⤖ᯝ, 㞳㝸㊥㞳ࡀ኱ࡁࡃ࡞ࡿ࡜┠㞃ࡋቨ࡟స⏝ࡍࡿ᭱኱ࣆ࣮ࢡ㢼ຊಀᩘࡣ኱ࡁࡃ࡞ࡾ, ᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘࡢ⤯ᑐ್ࡣᑠࡉࡃ࡞ࡿഴྥࡀぢࡽࢀࡓࠋ┠㞃ࡋቨࡢࣆ࣮ࢡ㢼ຊಀᩘࡣ, ┠㞃ࡋቨ୰ኸ㒊࡛᭱኱࡜࡞ࡾ, 㞳㝸ࡢ࡞࠸┠㞃ࡋቨ࡛ 3.5, 㞳㝸ࢆ᭷ࡍࡿ┠㞃ࡋቨ࡛ 3.6㹼3.9 ࡛࠶ࡗࡓࠋࡲࡓ, ᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘࡢ⤯ᑐ್ࡣ┠㞃ࡋቨ➃㒊࡛᭱ࡶ኱ࡁࡃ, 㞳㝸ࡢ࡞࠸┠㞃ࡋቨ࡛-2.9, 㞳㝸ࢆ᭷ࡍࡿ┠㞃ࡋቨ࡛-2.5㹼-2.2 ࡛࠶ࡗࡓࠋ

㺕㺎㺺㺎㺢㺼㸸  ᒇୖ┠㞃ࡋቨ, 㞳㝸㊥㞳, 㢼Ⲵ㔜, ࣆ࣮ࢡ㢼ຊಀᩘ, እᅽಀᩘ, 㢼Ὕᐇ㦂┠ ḟ㸸  ࡣࡌࡵ࡟                      ᐇ㦂⤖ᯝ     ᐇ㦂ᴫせ                   ࡲ࡜ࡵ     㢼ຊಀᩘࡢホ౯                 ࡣࡌࡵ࡟ࡑࢀࡒࢀ㢼ᅽᐃᏍࢆタࡅ࡚࠸ࡿࠋ⾲ 1 ࡟ᐇ㦂ࢣ࣮ࢫࢆᘓ≀ࡢᒇୖእ࿘㒊࡟ࡣ, ᬒほୖࡢ㜼ᐖせᅉ࡜࡞ࡿタഛ♧ ࡍ ࠋ ┠ 㞃 ࡋ ቨ ࡢ 㞳 㝸 ㊥ 㞳 ࡣ , ᘓ ≀ ➃ 㒊 ࡼ ࡾ 0mm,ᶵჾ㢮ࡢ㟢ฟࢆ㜵ࡄ࡜࡜ࡶ࡟, ࿘㎶ᆅ༊ࡢࢫ࢝࢖ࣛ࢖ࣥ10mm, 25mm x/B=0, 0.07, 0.17 ࡢィ 3 ࢣ࣮ࢫ࡜ࡋࡓࠋ
 ᐇ㦂Ẽὶᙧᡂࢆ┠ⓗ࡜ࡋ࡚, ┠㞃ࡋቨࢆタ⨨ࡍࡿࡇ࡜ࡀከ࠸ࠋ
ᒇୖ┠㞃ࡋቨ࡟స⏝ࡍࡿࣆ࣮ࢡ㢼ຊಀᩘࡣ, ⌧⾜ࡢᇶᐇ㦂Ẽὶࡣ, ᘓ⠏≀Ⲵ㔜ᣦ㔪 4 ࡟♧ࡉࢀ࡚࠸ࡿᆅ⾲㠃つ‽࡟ࡣ᫂♧ࡉࢀ࡚࠸࡞࠸ࠋᐇົ⪅ࡢࡓࡵࡢᘓ⠏≀እ⢒ᗘ༊ศϪࢆ┠ᶆ࡟సᡂࡋࡓࠋᅗ 2 ࡟ᐇ㦂Ẽὶࡢᖹᆒ㢼⿦ᮦ⪏㢼タィ࣐ࢽࣗ࢔ࣝ 1 ࡟ࡼࢀࡤ,㧗ᒙᘓ⠏≀ࡢ┠㞃

㏿, ஘ࢀࡢᙉࡉ࠾ࡼࡧኚື㢼㏿ࡢࣃ࣮࣡ࢫ࣌ࢡࢺࣝᐦᗘ

ࡋቨࢆᑐ㇟࡜ࡋࡓ㢼Ὕᐇ㦂⤖ᯝ࠿ࡽࣆ࣮ࢡ㢼ຊಀᩘ 4 ⛬ࢆ♧ࡍࠋ㢼Ὕᗋ㠃࠿ࡽࡢ㧗ࡉ 450mm ఩⨨ ᒇ᰿㧗ࡉ H

ᗘࢆタィࡢ┠Ᏻ࡜ࡋ࡚࠸ࡿࠋࡲࡓ, ୰ᒙ኱ࢫࣃࣥᘓ⠏≀࡟࠾ࡅࡿᖹᆒ㢼㏿ࡣ 9.5m/s, ஘ࢀࡢᙉࡉࡣ 18.8%࡛࠶ࡿࠋࡢ┠㞃ࡋቨࢆᑐ㇟࡜ࡋࡓ኱➉ࡽ 2 ࡢ◊✲ࡸ㏻Ẽᛶࢆ᭷ࡍ㢼Ὕᐇ㦂ࡢ┦ఝ๎ࡿ┠㞃ࡋࣃࢿࣝࡢࣆ࣮ࢡ㢼ຊಀᩘࢆồࡵࡓ┦ཎࡽ 3 ࡢ◊

๓㏙ࡢᶍᆺ⦰ᑻ⋡ࡼࡾ, ᘓ≀ࡢᒇ᰿㧗ࡉࡣᐇ≀᥮⟬࡛✲࡞࡝ࡶ࠶ࡾ, ㏆ᖺ┠㞃ࡋቨ࡟స⏝ࡍࡿࣆ࣮ࢡ㢼ຊಀᩘ

45m ࡜࡞ࡿࠋ㧗ࡉ 45m ఩⨨࡟࠾ࡅࡿタィ㢼㏿ࡣ, ᘓ⠏≀ࡀᩚഛࡉࢀࡘࡘ࠶ࡿࠋࡋ࠿ࡋ, ┠㞃ࡋቨࡢ㧗ࡉ᪉ྥ࣭ᖜⲴ㔜ᣦ㔪 4 ࡟ᇶ࡙ࡁ 39.7m/s タィ⏝෌⌧ᮇ㛫 100 ᖺ, ᇶ᪉ྥࡢࣆ࣮ࢡ㢼ຊಀᩘศᕸࡸᘓ≀➃㒊࠿ࡽࢭࢵࢺࣂࢵ

ᮏ㢼㏿ 37m/s ࡜タᐃࡋࡓ 㢼㏿ࡢ⦰ᑻ⋡㸸1/4 ࠋ᫬㛫ࡢࢡࡋࡓ఩⨨࡟࠶ࡿ┠㞃ࡋቨࡢ㢼ຊ≉ᛶ࡟ࡘ࠸࡚ࡣ᫂ࡽ⦰ᑻ⋡ Tm/Tf ࡣ, 1 ᘧࡢ࡜࠾ࡾᶍᆺࡢ⦰ᑻ⋡ Bm/Bf ࠾ࡼ࠿ࡉࢀ࡚࠸࡞࠸ࠋ

ࡧ㢼㏿ࡢ⦰ᑻ⋡ Um/Uf ࡼࡾ 1/25 ࡜࡞ࡿࠋࡑࡇ࡛ᮏ◊✲࡛ࡣ, ᘓ≀➃㒊࠿ࡽࡢ㞳㝸㊥㞳ࢆࣃ࣓ࣛ( Bm / B f )Tm
Tf࣮ࢱ࡜ࡋࡓᒇୖ┠㞃ࡋቨࡢ㢼ᅽᐇ㦂ࢆ⾜࠸, ┠㞃ࡋቨࡢࣆ࣮ࢡ㢼ຊಀᩘศᕸ࠾ࡼࡧ㞳㝸㊥㞳࡜ࣆ࣮ࢡ㢼ຊಀᩘ(U m / U f )

14u
100 1

1251  ᐇ㦂᪉ἲࡢ㛵ಀ࡟ࡘ࠸᳨࡚ウࡋࡓࠋᒇୖ┠㞃ࡋቨ࡟స⏝ࡍࡿ㢼ᅽࡣ, ┠㞃ࡋቨᶍᆺ࡟タࡅ ᐇ㦂ᴫせࡓ㢼ᅽ㢼Ὕᐇ㦂ࡣ, ᮾᛴᘓタᢏ⾡◊✲ᡤࡢᅇὶᘧቃ⏺ᒙ㢼ὝᐃᏍ࠿ࡽࣅࢽ࣮ࣝࢳ࣮ࣗࣈࢆ⏝࠸࡚㢼ᅽィ࡟ᑟࡁ, ከⅬྠ᫬ィ࡛⾜ࡗࡓࠋୗグ࡟ᐇ㦂ᴫせࢆ♧ࡍࠋࡋࡓࠋᐇ㦂㢼ྥ ș ࡣ, 0 ᗘ࠿ࡽ 355 ᗘࡲ࡛ 5 ᗘࣆࢵࢳ࡛ィ 72 㢼ྥ࡜ࡋࡓࠋ ᐇ㦂ᶍᆺࢹ࣮ࢱ཰㘓ࡣ, ࢧࣥࣉࣜࣥࢢ࿘Ἴᩘ 1kHz, 1 㢼ྥ࠶ࡓ

ᅗ 1 ࡟ᶍᆺᴫせࢆ♧ࡍࠋᶍᆺࡢ⦰ᑻ⋡ࡣ 1/100 ࡜ࡋ,ࡾࡢ཰㘓᫬㛫ࢆ 132 ⛊࡜ࡋࡓࠋୖ㏙ࡢ᫬㛫ࡢ⦰ᑻ⋡ࡼࡾ,ᖜ࣭ዟ⾜ࡁ 150mm, 㧗ࡉ 450mm B:D:H=1:1:3 ࡢṇ᪉ᙧ

1 㢼ྥ࠶ࡓࡾᐇ᫬㛫 3300 ⛊ 55 ศ㛫 ࡢࢹ࣮ࢱࡀᚓࡽࢀゅᰕᶍᆺୖ㒊࡟㧗ࡉ 50mm h/H=1/9 , ཌࡉ 2mm ࡢ┠㞃ࡿࠋ࡞࠾, ᑟᅽࢳ࣮ࣗࣈ࡟ࡼࡿ㢼ᅽࡢࡦࡎࡳࡣ, ணࡵࡋቨᶍᆺࢆタ⨨ࡋࡓࠋ┠㞃ࡋቨᶍᆺࡢ⾲㠃࡜⿬㠃࡟ࡣᐃࡋࡓᛂ⟅≉ᛶࢆ⏝࠸࡚࿘Ἴᩘ㡿ᇦ࡛⿵ṇࡋࡓࠋ* 技術研究所 温熱・風グループ

ᢏ⾡◊✲ᡤ

** 建築本部 技術管理部 技術管理第二グループ⇕࣭㢼ࢢ࣮ࣝࣉ ᘓ⠏ᮏ㒊ᢏ⾡⟶⌮㒊ᢏ⾡⟶⌮➨஧ࢢ࣮ࣝࣉ  61

東急建設技術研究所報No.41

 㢼ຊಀᩘࡢホ౯BA┠㞃ࡋቨࡢ㢼ຊಀᩘ Cf ࡢᐃ⩏ࢆ 2 ᘧ࡟♧ࡍࠋ㢼ຊಀBACᩘࡣ, ┠㞃ࡋቨ⾲㠃ࡢእᅽ Pe ࡜⿬㠃ࡢእᅽ Pr ࡢᕪᅽࢆCồࡵ, ᒇ᰿㧗ࡉ H ࡟࠾ࡅࡿ㏿ᗘᅽ qH ࡛↓ḟඖ໬ࡋࡓࠋPe  PrqHCf

b Case2C pe  C pr2 B

Aࡇࡇ࡟, Cpe㸸┠㞃ࡋቨ⾲㠃ࡢእᅽಀᩘCpr㸸┠㞃ࡋቨ⿬㠃ࡢእᅽಀᩘC ᐇ㦂⤖ᯝc Case3 ࣆ࣮ࢡ㢼ຊಀᩘࡢホ౯᪉ἲᅗ3࡟

ᐃⅬ BC 㛫ࡢኚື㢼ຊࡢ࣮ࣝࢺࢥࣄ࣮ࣞࣥ

ࢫࢆ♧ࡍࠋᶓ㍈ࡣ↓ḟඖ࿘Ἴᩘࢆ♧ࡋ, n ࡣ࿘Ἴᩘ, Ǽࡣ BC 㛫ࡢ㊥㞳 40mm , U ࡣᒇ᰿㧗ࡉ H ࡟࠾ࡅࡿᐇ㦂㢼㏿ 9.5m/s ࡛࠶ࡿࠋྠᅗ୰࡟, 3 ᘧ࡛♧ࡍࢹ࢕ࢣ࢖ࣇ
࢓ࢡࢱ࣮k=8 ࡜ࡋࡓ㏆ఝ⥺ࢆేグࡍࡿࠋ

G12 ( n )Coh ( n )ࡇࡇ࡟,șn' ºªexp «  kU »¼¬

G1 ( n )  G 2 ( n )3 a Case1Caseᘓ≀ᖜ
B mm123150
1501502 Ⅼ㛫ࡢ┦㛵ࡣ Case1, 2, 3 ࡢ㡰࡟㧗ࡃ, k ್ࡣᴫࡡ 8 ⛬ᗘ࡛࠶ࡿࠋࡇࢀࡣ, ᘓ⠏≀Ⲵ㔜ᣦ㔪 1993 4 ࡟グࡉࢀ࡚࠸ࡿ┠Ᏻ್࡜୍⮴ࡍࡿࠋࡇࡇ࡛, እ⿦ᮦࡢ௦⾲㛗ࡉ L ࢆ
2㹼3m ⛬ᗘ࡜௬ᐃࡍࡿ࡜, 4 ᘧ࡟♧ࡍ TVL ἲ 5 ࡟ࡼࡾ,‫ۑ‬UZ㻌㻔ᐇ㦂್ࡿࣆ࣮ࢡእᅽಀᩘࡢᖹᆒ໬᫬㛫ࡀ 0.5㹼1.0 ⛊࡛࠶ࡿࡇ࡜
ࡶ㋃ࡲ࠼, ᐇ㦂࡛ᚓࡽࢀࡓ᫬้Ṕࢹ࣮ࢱ࡟ᐇ᫬㛫 0.5 ⛊ࡢ⛣ືᖹᆒࢆ᪋ࡋ, ホ౯᫬㛫 600 ⛊࡟┦ᙜࡍࡿ 5 ⤌ࡢ࢔ࣥࢧࣥࣈࣝᖹᆒ࡟ࡼࡾࣆ࣮ࢡ㢼ຊಀᩘࢆホ౯ࡋࡓࠋࡇࡇ࡟,4UH㸸タィ㢼㏿ =39.7m/s

ᅗ 4 ࡟ྛ

‫ڹ‬IZ㻌㻔ᐇ㦂್D┠㞃ࡋቨࢆእഃ࠿ࡽෆഃ࡟ᢲࡍ᪉ྥࢆṇ + , ෆഃ࠿ࡽ100ࢡ㢼ຊಀᩘ Cfmax ࡢ㧗ࡉ᪉ྥࡢศᕸࡣ, 㞳㝸ࡢ࡞࠸ Case1

0.8

Root Coherence1

Case2 x/B=0.07 ࡸ Case3 x/B=0.17 ࡛ࡣ୰ẁ࡯࡝್ࡀ኱
ࡁࡃ࡞ࡿഴྥ࡟࠶ࡿࠋCase1 ࡢ᭱኱ࣆ࣮ࢡ㢼ຊಀᩘ
Cfmax ࡣ, ┠㞃ࡋቨ୰ኸୗẁࡢᐃⅬ࡛᭱ࡶ኱ࡁࡃ 3.5 ,Case2 ࠾ࡼࡧ Case3 ࡛ࡣ୰ኸᐃⅬ࡛᭱኱࡜࡞ࡗࡓ1
10 20
UZ m/s 㻌, IZ

0.01
0.01

0.1
1nLH㻌/U10H‫ۑ‬Case1‫ۑ‬Case2‫ۑ‬Case3
exp -8nԥ/U

0.6
0.4
0.2
000.05

Case2㸸3.6, Case3㸸3.9 ࠋࡲࡓ, ᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ
Cfmin ࡢ⤯ᑐ್ࡣ࠸ࡎࢀࡢࢣ࣮ࢫࡶ┠㞃ࡋቨୖ➃0.1

ᖹᆒ㢼㏿࣭஘ࢀࡢᙉࡉ
E ኚື㢼㏿ࡢ PSDᅗ  ᐇ㦂Ẽὶእഃ࡟ྥ࠿ࡗ࡚ᢲࡍ᪉ྥࢆ㈇  ࡜ᐃ⩏ࡋࡓࠋ᭱኱ࣆ࣮
ࡢሙྜ, ┠㞃ࡋቨୗẁ࡯࡝್ࡀ኱ࡁࡃ, 㞳㝸ࢆ᭷ࡍࡿᣦ㔪್ Karmanᆺ

1ᐃⅬࡢ᭱኱࣭᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ ඲㢼ྥ୰ࡢ᭱኱್࡜᭱ᑠ್ ࢆ♧ࡍࠋࣆ࣮ࢡ㢼ຊಀᩘࡢ➢ྕࡣ,ᐇ㦂್IZ㻌 ᣦ㔪್100.1 ᭱኱࣭᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ

UZ㻌㻔ᣦ㔪್‫ۂ‬ᒇ᰿㧗ࡉHnSu(n) /Ȫ2㢼Ὕᗋ㠃࠿ࡽࡢ㧗ࡉZ mm

ᘓ⠏≀Ⲵ㔜ᣦ㔪ࡸᘓタ┬࿌♧➨ 1458 ྕ 6 ࡟♧ࡉࢀ࡚࠸

0.4㹼0.6 sec┠㞃ࡋቨᖜ㞳㝸㊥㞳b mmx mmx /B15000130
100.07100250.17

㧗ࡉh mm5050501000

0.4㹼0.6 ⛊ࡢᖹᆒ໬᫬㛫 Ta ࢆᚓࡿࠋᮏ᳨ウ࡛ࡣ, ⌧⾜ࡢ

8 u ( 2㹼3)
39 .7

㢼ྥゅ

⾲  ᐇ㦂ࢣ࣮ࢫG1 n , G2 n 㸸ࣃ࣮࣡ࢫ࣌ࢡࢺࣝᐦᗘkLUHdᅗ  ᶍᆺᴫせ࠾ࡼࡧ㢼ྥゅࡢᐃ⩏Coh (n ) 㸸࣮ࣝࢺࢥࣄ࣮ࣞࣥࢫ
G12 n 㸸ࢡࣟࢫࢫ࣌ࢡࢺࣝᐦᗘ

Ta0ᗘ

0.1

0.15

0.2

0.25

nԥ/U

ᅗ  ኚື㢼ຊࡢ࣮ࣝࢺࢥࣄ࣮ࣞࣥࢫ

ᐃⅬ ࡛᭱኱࡜࡞ࡗࡓ Case1㸸-2.9, Case2㸸2.5, Case3㸸2.2 ࠋ62

ᐃⅬ BC 㛫, 㢼ྥゅ 275 ᗘ0.3

東急建設技術研究所報No.41

2.6

2.7 2.8 2.7

2.9

3.0

3.0

3.0

2.9

3.4

3.3 3.2 3.0

3.4

3.8

3.9

3.93.5

3.5

3.4 3.3 3.0

2.9

2.9

2.9

3.0

2.8



D Case1 ᭱኱್

2.7 2.7 2.7



3.0 3.1 3.3


3.0 3.2 3.4

E Case2 ᭱኱್

F Case3 ᭱኱್-2.7 -2.2 -2.0

-1.8

-2.0 -2.2 -2.9

-2.1

-1.7

-1.5

-1.7

-2.2

-2.9 -2.8 -1.7

-1.1

-1.7 -2.9 -2.9

-1.5

-1.4

-0.9

-1.4

-1.6

-1.4

-2.2 -2.3 -2.5

-2.1

-1.3

-0.8

-1.3-2.1

-2.4 -2.4 -2.1



H Case2 ᭱ᑠ್

G Case1 ᭱ᑠ್I Case3 ᭱ᑠ್ᅗ  ᒇୖ┠㞃ࡋቨࡢ᭱኱࣭᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ ඲㢼ྥ୰ࡢ᭱኱್࡜᭱ᑠ್ ࣆ࣮ࢡ㢼ຊಀᩘࡢ㢼ྥゅ࡟ࡼࡿኚ໬4ᅗ 5 ࡟ࣆ࣮ࢡ㢼ຊಀᩘࡢ⤯ᑐ್ࡀ᭱኱࡜࡞ࡗࡓ┠㞃ࡋ

3ᐃⅬ A ࡜ୖ➃ᐃⅬ B ࡟࠾ࡅࡿࣆ࣮ࢡ㢼ຊಀ

Cf maxቨ୰ኸᩘࡢ㢼ྥゅ࡟ࡼࡿኚ໬ࢆ♧ࡍࠋ a ࡟♧ࡍ᭱኱ࣆ࣮ࢡ㢼ຊಀᩘ Cfmax ࡣ┠㞃ࡋቨࡀ㢼࡟ṇᑐࡍࡿ㢼ྥゅ 0 ᗘ࡛᭱2
‫ە‬Case1‫ە‬Case21኱࡜࡞ࡗࡓࠋࡲࡓ, b ࡟♧ࡍ᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ Cfmin‫ە‬Case30ࡢ⤯ᑐ್ࡀ᭱኱࡜࡞ࡿ㢼ྥࡣ, Case1 ࡛ 275 ᗘ, Case2 ࠾04590135

ࡼࡧ Case 3 ࡣ 135 ᗘ࡛࠶ࡗࡓࠋ ┠㞃ࡋቨ⾲⿬㠃ࡢእᅽಀᩘ
ᅗ6࡟

D1

ᐃⅬ A ࡜ B ࡟࠾ࡅࡿእᅽಀᩘࡢ㢼ྥゅ࡟ࡼࡿኚ໬ࢆ♧ࡍࠋᅗ୰ࡢ⾲㠃እᅽಀᩘ Cpe ࡜⿬㠃እᅽಀᩘ

225

270

315

360

315360᭱኱ࣆ࣮ࢡ㢼ຊಀᩘ A Ⅼ 

0Cf minCpr ࡣ, ࣆ࣮ࢡ㢼ຊࡀⓎ⏕ࡋࡓ᫬้ࡢ್࡜ࡋ࡚࠸ࡿࡓࡵ,ྛࢣ࣮ࢫࡢ Cpe ࡜ Cpr ࡢᕪࡣᅗ 5 ࡜୍⮴ࡍࡿࠋᅗ 7㹼9 ࡟㢼ྥゅ 135 ᗘ࡟࠾ࡅࡿ Case1㹼Case3 ࡢእᅽಀᩘ Cpe, Cpr-1‫ڸ‬Case1-2‫ڸ‬Case2

࡜᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ Cfmin ࡢศᕸࢆ♧ࡍࠋᮏᅗࡣ, ᶍᆺࡢᑐ㇟ᛶࢆ⪃៖ࡋ࡚180ȟ deg‫ڸ‬Case3-3

ᐃⅬࢆ᭷ࡉ࡞࠸ 3 ቨ㠃࡟ࡘ࠸࡚

04590

135

180
ȟ deg

ࡶᒎ㛤ࡋ࡚♧ࡋ, ㉥▮༳ࡣ┠㞃ࡋቨࡢ⾲㠃࠾ࡼࡧ⿬㠃ࢆ
Eᢲࡍ᪉ྥ࡟స⏝ࡍࡿຊࢆ, 㟷▮༳ࡣᘬࡗᙇࡿ᪉ྥ࡟స⏝225270᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ B Ⅼ ᅗ  ࣆ࣮ࢡ㢼ຊಀᩘࡢ㢼ྥゅ࡟ࡼࡿኚ໬

ࡍࡿຊ Cfmin ࡢሙྜࡣ, ┠㞃ࡋቨࢆෆഃ࠿ࡽእഃ࡟ྥ࠿

3ࡗ࡚ᢲࡍຊ ࢆ⾲ࡋ࡚࠸ࡿࠋ a ࡢ⾲㠃እᅽಀᩘ Cpe ࡜2Cpe, Cprb ࡢ⿬㠃እᅽಀᩘ Cpr ࡢᕪᅽ ࣋ࢡࢺࣝ࿴ ࢆ࡜ࡿ࡜,c ࡟♧ࡍ᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘ Cfmin ࡢศᕸࡀᚓࡽࢀࡿࠋ
ᅗ 6 a ࡢ㢼ྥゅ 0 ᗘࡢ್࡟╔┠ࡍࡿ࡜, Cpe ࡣ Case1㹼
3 ࡛኱ࡁ࡞ኚ໬ࡣぢࡽࢀ࡞࠸ࡀ, Cpr ࡢ⤯ᑐ್ࡣ Case1, 2,

Case1_Cpe

Case2_Cpe

Case3_Cpe

Case1_Cpr

Case2_Cpr

Case3_Cpr

90180
ȟ deg

10-13 ࡢ㡰࡟኱ࡁࡃ࡞ࡗ࡚࠸ࡿࠋᑐ⛠㠃࡛࠶ࡿ㢼ྥゅ 180 ᗘ-2࡟ࡘ࠸࡚ࡶྠᵝࡢഴྥࡀぢࡽࢀࡿࠋࡇࢀࡣ, ┠㞃ࡋቨࡀ

045135ࢭࢵࢺࣂࢵࢡࡋ࡚࠸ࡿࡇ࡜࡛┠㞃ࡋቨୖ㒊ࢆ஌ࡾ㉺࠼Dࡿὶࢀࡀᙉࡃ࡞ࡾ, ⿬㠃࡟኱ࡁ࡞㈇ᅽࡀ⏕ࡌࡓࡓࡵ࡜⪃225

270315360᭱኱ࣆ࣮ࢡ㢼ຊಀᩘⓎ⏕᫬ࡢእᅽಀᩘ A Ⅼ 2࠼ࡽࢀࡿࠋᅗ 6 b ࡢ㢼ྥゅ 135 ᗘ࡛ࡣ, Cpe ࡟኱ࡁ࡞ኚ1Cpe, Cpr໬ࡣぢࡽࢀ࡞࠸ࡶࡢࡢ, Cpr ࡣ Case3, 2, 1 ࡢ㡰࡟್ࡀ኱ࡁ
ࡃ࡞ࡗ࡚࠸ࡿࠋࡇࢀࡣ, ᅗ 7㹼9 b ࡟♧ࡍ࡜࠾ࡾ㞳㝸ࡢ࡞࠸┠㞃ࡋቨ࡯࡝┠㞃ࡋቨෆ㒊࡟㢼ࡀὶࢀࡇࡳࡸࡍࡃ
࡞ࡾ, ᑐゅ⥺ୖ࡟࠶ࡿ┠㞃ࡋቨࢆෆഃ࠿ࡽᙉࡃᢲࡋ࡚࠸

0-1-2-3ࡿࡓࡵ࡜⪃࠼ࡽࢀࡿࠋࡲࡓ, 㢼ྥゅ 275 ᗘ௜㏆࡟࠾࠸࡚,Case1_Cpe

Case2_Cpe

Case3_Cpe

Case1_Cpr

Case2_Cpr

Case3_Cpr

135

225-4

Case1 ࡜௚ࡢࢣ࣮ࢫ࡛ࡣ Cpe ࡟㢧ⴭ࡞ᕪࡀぢࡽࢀࡿࠋᘓ

045≀➃㒊࠿ࡽ㞳㝸ࢆ᭷ࡍࡿ┠㞃ࡋቨ Case2, 3 ࡢሙྜ, 㞳㝸ࡢ࡞࠸┠㞃ࡋቨ Case1 ࡟ẚ࡭࡚➃㒊ࢆ๤㞳ࡍࡿὶࢀࡀᙅࡲࡗࡓࡶࡢ࡜᥎ᐹࡉࢀࡿࠋ

63E90180
ȟ deg270315360

᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘⓎ⏕᫬ࡢእᅽಀᩘ B Ⅼ ᅗ  ┠㞃ࡋቨ⾲⿬㠃እᅽಀᩘࡢ㢼ྥゅ࡟ࡼࡿኚ໬

東急建設技術研究所報No.41

Cpe, Cpr, Cfmin=1.0 ┠㞃ࡋቨࡢ㞳㝸㊥㞳࡜㒊఩ูࣆ࣮ࢡ㢼ຊಀᩘᅗ 10 ࡟┠㞃ࡋቨࡢ㞳㝸㊥㞳 x/B ࡜㒊఩ูࡢࣆ࣮ࢡ㢼ຊಀᩘࢆ♧ࡍࠋ㒊఩ศࡅࡣ┠㞃ࡋቨ➃㒊࠿ࡽᘓ≀ᖜࡢ㸻㸩

10% 0.1B ࡢ⠊ᅖࢆ➃㒊, ࡑࢀ௨እࡢ㡿ᇦࢆ୰ኸ㒊࡜ᐃ⩏ࡋࡓࠋ๓㏙ࡢ࡜࠾ࡾ, ┠㞃ࡋቨࡢ᭱኱ࣆ࣮ࢡ㢼ຊಀᩘࡣ x/B ࡢቑຍ࡟కࡗ࡚኱ࡁࡃ࡞ࡿࡀ, ᭱ᑠࣆ࣮ࢡ㢼ຊಀb Cpr

a Cpeᩘࡢ⤯ᑐ್ࡣ㏫࡟ᑠࡉࡃ࡞ࡿࠋ⾲ 2 ࡟ࣆ࣮ࢡ㢼ຊಀᩘࡢc Cfminᅗ  Case1 ࡢእᅽಀᩘ࣭ࣆ࣮ࢡ㢼ຊಀᩘศᕸ ș=135 ᗘࡲ࡜ࡵࢆ♧ࡍࠋ᪤ ࡢᩥ⊩ 1 ࡟グࡉࢀ࡚࠸ࡿᒇୖ┠㞃ࡋቨࢆタィࡍࡿ㝿࡟⏝࠸ࡿࣆ࣮ࢡ㢼ຊಀᩘࡢ┠Ᏻ್ s4.0 ࡜ᮏᐇ㦂⤖ᯝࢆẚ㍑ࡍࡿ࡜, ᭱኱್࡟㛵ࡋ࡚ࡣྠ⛬㸻㸩ᗘ, ᭱ᑠ್ࡣᏳ඲ഃࡢ್࡛࠶ࡗࡓࠋ⾲  ᮏᐇ㦂࡛ᚓࡽࢀࡓ㒊఩ูࣆ࣮ࢡ㢼ຊಀᩘ㒊఩➃㒊୰ኸ㒊0

㞳㝸㊥㞳x /B
0.07

0.17

᭱኱

3.3

3.1

3.5

᭱ᑠ

-2.9

-2.5

-2.2

᭱኱

3.5

3.6

3.9

᭱ᑠ

-2.2

-1.9

-1.7

᪉ྥ

b Cpr

a Cpe

c Cfminᅗ  Case2 ࡢእᅽಀᩘ࣭ࣆ࣮ࢡ㢼ຊಀᩘศᕸ ș=135 ᗘ㸻㸩 ࡲ࡜ࡵᘓ≀➃㒊࠿ࡽ㞳㝸ࢆ᭷ࡍࡿᒇୖ┠㞃ࡋቨ࡟స⏝ࡍࡿa Cpe

ࣆ࣮ࢡ㢼ຊಀᩘศᕸ࠾ࡼࡧ㞳㝸㊥㞳࡜ࣆ࣮ࢡ㢼ຊಀᩘb Cpr

c Cfminᅗ  Case3 ࡢእᅽಀᩘ࣭ࣆ࣮ࢡ㢼ຊಀᩘศᕸ ș=135 ᗘࡢ㛵ಀ࡟ࡘ࠸᳨࡚ウࡋࡓࠋ௨ୗ࡟ࡲ࡜ࡵࢆ♧ࡍࠋ

4

4

22

Cf min, Cf max

ຊಀᩘࡣ኱ࡁࡃ࡞ࡿࡀ, ᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘࡢ⤯ᑐ್ࡣᑠࡉࡃ࡞ࡿഴྥࡀぢࡽࢀࡓࠋ
ղ┠㞃ࡋቨࡢࣆ࣮ࢡ㢼ຊಀᩘࡣ, ┠㞃ࡋቨ୰ኸ㒊࡛᭱኱࡜࡞ࡾ, 㞳㝸ࡢ࡞࠸┠㞃ࡋቨ࡛ 3.5, 㞳㝸ࢆ᭷ࡍࡿCf min, Cf max

ձ┠㞃ࡋቨࡢ㞳㝸㊥㞳ࡀ኱ࡁࡃ࡞ࡿ࡜, ᭱኱ࣆ࣮ࢡ㢼0-2

0-2‫ە‬᭱኱ ‫ڸ‬᭱ᑠ‫ۑ‬᭱኱ ‫ڹ‬᭱ᑠ┠㞃ࡋቨ࡛ 3.6 x/B=0.07 㹼3.9 x/B=0.17 ࡛࠶ࡗࡓࠋ-4-4᭱ᑠࣆ࣮ࢡ㢼ຊಀᩘࡢ⤯ᑐ್ࡣ┠㞃ࡋቨ➃㒊࡛᭱ࡶ

0኱ࡁࡃ, 㞳㝸ࡢ࡞࠸┠㞃ࡋቨ࡛-2.9, 㞳㝸ࢆ᭷ࡍࡿ┠

0.05

a

㞃ࡋቨ࡛-2.5 x/B=0.07 㹼-2.2 x/B=0.17 ࡛࠶ࡗࡓࠋ

0.1
x/B

0.15

୰ኸ㒊

0.2

0

0.05

E

0.1
x/B

0.15

0.2

➃㒊

ᅗ  ┠㞃ࡋቨࡢ㞳㝸㊥㞳࡜㒊఩ูࣆ࣮ࢡ㢼ຊಀᩘཧ⪃ᩥ⊩

1 ᪥ᮏᘓ⠏Ꮫ఍㸸ᐇົ⪅ࡢࡓࡵࡢᘓ⠏≀እ⿦ᮦ⪏㢼タィ࣐ࢽࣗ࢔ࣝ, 20132 ኱➉࿴ኵ㸸኱つᶍᘓ≀ࡢᒇ᰿እ⿦ᮦ⏝ࣆ࣮ࢡእᅽ࣭㢼ຊಀᩘ࡟㛵ࡍࡿ◊✲, ᪥ᮏᘓ⠏Ꮫ఍Ꮫ⾡ㅮ₇᱾ᴫ㞟, pp.217-218, 20083 ┦ཎ▱Ꮚ࣭᳜ᯇᗣ㸸㏻Ẽᛶࡢ࠶ࡿᒇୖ┠㞃ࡋࣃࢿࣝ࡟స⏝ࡍࡿእ⿦ᮦ⏝㢼Ⲵ㔜ࡢ᳨ウ, 㢼ᕤᏛࢩ࣏ࣥࢪ࣒࢘ㄽᩥ㞟, pp.391-396, 20144 ᪥ᮏᘓ⠏Ꮫ఍㸸ᘓ⠏≀Ⲵ㔜ᣦ㔪࣭ྠゎㄝ, 2015, 1993
5 T.V.Lawson㸸Wind Effects on Buildings Vol.1 Design Applications, 1980
6 㟘ࣨ㛵ฟ∧♫㸸ᖹᡂ 20 ᖺ∧ᇶᮏᘓ⠏㛵ಀἲ௧㞟>࿌♧⦅@, 20087 ᮏ⏣ᏹṊ࣭ᰩ⏣๛௚ 2 ྡ㸸ᒇୖ┠㞃ࡋቨ࡟స⏝ࡍࡿࣆ࣮ࢡ㢼ຊಀᩘ, ᪥ᮏᘓ⠏Ꮫ఍኱఍Ꮫ⾡ㅮ₇᱾ᴫ㞟, pp.185-186, 2015

A STUDY OF PEAK WIND FORCE COEFFICIENTS FOR SCREEN STANDING ON ROOFTOP
H.Honda, T.Kurita, and N.Katou
This paper describes peak wind force coefficients for screen standing on rooftop. The blindfold screen is often attached to theoutside perimeter of building. However, distribution of wind force coefficients on screen stood away from the building edge has notbeen clarified. In this study, wind tunnel tests were performed to investigate relationship between separation distance and wind force
coefficients for screen standing on rooftop. As a result, we observed tendency for the maximum peak wind force coefficient increase
with increasing separation distance, and absolute value of the minimum peak wind force coefficient decrease with increasing
separation distance. It was obtained that the maximum peak wind force coefficient is 3.5 to 3.9, and its minimum value is -2.2 to -2.9.

64