Ṕྐ㒔ᕷ㜵⅏ㄽᩥ㞟 Vol. 3㸦2009ᖺ6᭶㸧
ఏ⤫ⓗᮌ㐀⏫ᐙᘓ⠏ࡢᆅ㟈⿕ᐖᵓ㐀ᛶ⬟ホ౯
Damage from Earthquake Disaster and Evaluation of Structural Performance
of Traditional Timber Townhouse in Japan
బ⸨ᘯ⨾
1࣭⸨⏣㤶⧊
2Hiromi Sato and Kaori Fujita
1ᚨᓥᏛຓᩍ Ꮫ㝔ࢯࢩ࢜ࢸࢡࣀࢧ࢚ࣥࢫ◊✲㒊㸦ࠛ770-8506 ᚨᓥ┴ᚨᓥᕷ༡ᖖ୕ᓥ⏫2-1㸧
Assistant Professor, the University of Tokushima, Department of Ecosystem Design
2ᮾிᏛᩍᤵ Ꮫ㝔ᕤᏛ⣔◊✲⛉㸦ࠛ113-8656 ᮾி㒔ᩥி༊ᮏ㒓7-3-1㸧
Assosiate Professor, The University of Tokyo,Department of Architecture
This paper presents the results of the damage investigation and the evaluation of structural performance of traditional timber townhouse in Japan. The aim of this research is to clarify the failure mode of traditional timber townhouse based on the results of damage investigation after earthquakes. Damage investigation, seismic diagnosis and earthquake response analysis were performed on a traditional townhouse in Wajima City, which was severely damaged by the 2007 Noto Peninsula earthquake. The results of the damage investigation is discussed in relation with the results of seismic diagnosis and earthquake response analysis operated on the specific structure after the earthquake.
Key Words : traditional timber construction, failure mode, seismic diagnosis, the 2007 Noto Peninsula Earthquake
㸯㸬ࡣࡌࡵ ◊✲ࡢ⫼ᬒ┠ⓗ ᖹᡂ19ᖺ3᭶25᪥Ⓨ⏕ࡋࡓ⬟Ⓩ༙ᓥᆅ㟈ࡢ⿕ᐖㄪᰝ࠾࠸࡚ࠊఏ⤫ⓗ࡞⏫ᐙᘓ⠏ከࡃࡢ⿕ᐖࡀぢࡽࢀ ࡓࠋఏ⤫ⓗ࡞ᮌ㐀ᘓ⠏ࡣṔྐⓗࠊᵓἲⓗࡶ౯್ࡀ࠶ࡾᚋୡṧࡍࡁᘓ⠏≀ࡀከࡃᏑᅾࡍࡿࡀࠊ୍᪉࡛ ࡑࢀࡽࡢఏ⤫ⓗᮌ㐀ᘓ⠏ࡣ⌧ᅾồࡵࡽࢀࡿ⪏㟈ᇶ‽ࢆ‶ࡓࡉ࡞࠸ࡶࡢࡶከ࠸ࠋࡇࡢࡇࡣ㏆ᖺྛᆅ࡛Ⓨ⏕ࡋ ࡚࠸ࡿᆅ㟈ࡢ⿕ᐖࠊ≉1995ᖺරᗜ┴༡㒊ᆅ㟈ࡢ㝿⿕ᐖࡀከࡗࡓࡇࡽࡶᣦࡉࢀ࡚࠾ࡾࠊྂ࠸ᵓ ἲ࡛ᘓ࡚ࡽࢀࡓᮌ㐀ఫᏯࡢᵓ㐀ᛶ⬟ࡢホ౯ࡑࢀక࠺⿵ᙉ➼ᑐ⟇ࡣ༴ᛴࡢㄢ㢟࡛࠶ࡿࠋఏ⤫ⓗᮌ㐀ఫᏯࡢ ୰࡛㎰ᐙᘓ⠏࠾࠸࡚ࡣᐇ㦂ࢆక࠺ᵝࠎ࡞◊✲ࡀ⾜ࢃࢀᵓ㐀ᛶ⬟ホ౯ࡀࡉࢀ࡚ࡁࡓࡀࠊ⏫ᐙᘓ⠏ࡘ࠸࡚ࡣࠊ ࠕி⏫ᐙࠖ௨እࡢ୍⯡ⓗ࡞⏫ᐙࡘ࠸࡚ࡣᮍࡔ༑ศᵓ㐀ᛶ⬟ࡀ᳨ドࡉࢀ࡚࠸ࡿࡣ࠸࠼࡞࠸ࡢࡀ⌧≧࡛࠶ࡿࠋ Ṕྐ㒔ᕷࢆᵓᡂࡍࡿ୍せ⣲࡛࠶ࡿఏ⤫ⓗ⏫ᐙᘓ⠏ࡘ࠸࡚ᵓ㐀ᛶ⬟ࡀ㐺ษホ౯ࡉࢀࡿࡇࡣࠊ㠀ᖖ㔜せ ࡞ㄢ㢟⪃࠼ࡽࢀࡿࠋᮏㄽᩥ࡛ࡣఏ⤫ⓗᮌ㐀ఫᏯࡢ࠺ࡕࠊ୍⯡ⓗ࡞⏫ᐙᘓ⠏ࢆᑐ㇟ࡋࠊᆅ㟈⿕ᐖㄪᰝ⤖ᯝ ᇶ࡙࠸࡚◚ቯ࣮ࣔࢻࡢศ㢮ࢆ⾜࠸ࠊᵓ㐀ᛶ⬟ホ౯ࡢ᳨ドࢆ⾜࠺ࡇࢆ┠ⓗࡍࡿࠋ ᪤ ࡢ◊✲ ఏ⤫ⓗᮌ㐀ఫᏯ㛵ࡍࡿ◊✲ࡣࠊ㎰ᐙᆺࡢఫᏯࢆᑐ㇟ࡋࡓ◊✲ࡣ1984ᖺᮡᒣࡽࡼࡗ࡚⾜ࢃࢀࡓᐇ ᘓ≀ᐇ㦂1)ࢆࡣࡌࡵࡋ࡚ᩘከࡃࡢ◊✲ࡀ⾜ࢃࢀ࡚࠸ࡿࠋ୍᪉⏫ᐙᆺࡢఫᏯࢆᑐ㇟ࡋࡓ◊✲ࡣࠊ⏫ᐙࡢ୰ ࡛ࡶ≉ᚩⓗ࡛࠶ࡿி⏫ᐙ㛵ࡍࡿ◊✲ࡀከࡃࠊࡑࢀ௨እࡢ୍⯡ⓗ࡞⏫ᐙᘓ⠏㛵ࡍࡿ◊✲ࡣᑡ࡞࠸ࠋி⏫ᐙ ࢆᑐ㇟ࡋࡓ◊✲࡛ࡣࠊ2005ᖺE-ࢹࣇ࢙ࣥࢫࡢ3ḟඖືྎᐇ㦂ࢆ⏝࠸ࡓᐇືྎᐇ㦂ࡀ㕥ᮌࡽࡼ ࡗ࡚⾜ࢃࢀ࡚࠸ࡿ2)ࠋືᛶ≧㛵ࡍࡿホ౯ࡘ࠸࡚ᯘࠊ㕥ᮌࡽࡼࡗ࡚◊✲ࡀ⾜ࢃࢀ࡚࠾ࡾࠊி⏫ᐙࡢࡳ
ࢆᑐ㇟ࡋࡓ⡆᫆࡞࣮࣋ࢫࢩಀᩘࡢ⟬ฟᘧࡀᥦࡉࢀ࡚࠸ࡿ3)ࠋ⪏㟈ᛶ⬟ホ౯ࠊ⿵ᙉタィᡭἲࡋ࡚ࡣࠊ 㕥ᮌࡽࡼࡗ࡚㝈⏺⪏ຊィ⟬ࡼࡿ⪏㟈⿵ᙉタィࡢ᪉㔪ࡀᥦࡉࢀ࡚࠸ࡿ4)ࠋி⏫ᐙࡢ⪏㟈せ⣲ࡋ࡚㔜せ ࡛࠶ࡿᅵቨࡢᛶ⬟ホ౯ࡘ࠸࡚ࡣࠊ㏆ᖺ࡛ࡣᑠᯇࡽࡢ◊✲ࡀᣲࡆࡽࢀࡿ5)ࠋ⌧ᅾࠊ⏫ᐙᘓ⠏ࡢᵓ㐀ᛶ⬟ホ౯ࠊ ᳨ド㛵ࡋ࡚ࡣி⏫ᐙࢆᑐ㇟ࡋࡓࡶࡢࡀ୰ᚰ࡛࠶ࡾࠊࡑࢀ௨እࡢ≉ᚩࢆᣢࡘ⏫ᐙᘓ⠏ࡘ࠸࡚ࡣᵓ㐀ᛶ⬟ ホ౯ࠊ᳨ドࡀ༑ศ⾜ࢃࢀ࡚ࡁ࡚࠸࡞࠸ࠋᮏ◊✲࡛ࡣி⏫ᐙ࡛ࡣ࡞࠸ఏ⤫ⓗ⏫ᐙᘓ⠏ࢆᑐ㇟ࡋࠊᆅ㟈⿕ᐖㄪ ᰝ⤖ᯝࢆᇶ◚ቯ࣮ࣔࢻࢆศ㢮ࡋࠊᵓ㐀ᛶ⬟ホ౯ࠊ⪏㟈デ᩿ࡢ⢭ᗘࡢྥୖࡘ࡞ࡀࡿᇶ♏ⓗ࡞㈨ᩱ࡞ࡿࡇ ࢆ┠ᣦࡍࠋ 㸰㸬ఏ⤫ⓗ⏫ᐙᘓ⠏ࡢᆅ㟈⿕ᐖ ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡼࡿ⏫ᐙࡢ⿕ᐖ D ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡢᴫせ ᖹᡂ19ᖺ3᭶25᪥942ศ㡭ࠊ⬟Ⓩ༙ᓥἈ㸦⦋37ᗘ13.2ศࠊᮾ⤒136ᗘ41.1ศ㸧ࡢ῝ࡉ11kmࢆ㟈※ࡍࡿ ࣐ࢢࢽࢳ࣮ࣗࢻ6.9ࡢᆅ㟈ࡀⓎ⏕ࡋࡓࠋ▼ᕝ┴ᑿᕷࠊ㍯ᓥᕷࠊ✰Ỉ⏫࡛㟈ᗘ6ᙉࠊ▼ᕝ┴ᚿ㈡⏫ࠊ୰⬟Ⓩ⏫ࠊ ⬟Ⓩ⏫࡛㟈ᗘ6ᙅࢆほ ࡋࡓ6)ࠋᮏᆅ㟈ࡼࡿேⓗ⿕ᐖࡣࠊṚ⪅1ྡࠊ㈇യ⪅356ྡ࡛࠶ࡾࠊᘓ≀⿕ᐖࡣఫᐙ ࡘ࠸࡚ࡣቯ684Ჷࠊ༙ቯ1733Ჷࠊ୍㒊ᦆቯ26935Ჷ࡛࠶ࡗࡓ㸦2007ᖺ12᭶28᪥14:00⌧ᅾ㸧7)ࠋ E ఏ⤫ⓗᮌ㐀ᘓ⠏ࡢᆅ㟈⿕ᐖഴྥ ᮏᆅ㟈ࡼࡿᘓ≀⿕ᐖࡢࢆ♧ࡍࠋ▼ᕝ┴ࡣ㍯ᓥᕷࠊᑿᕷࢆ୰ᚰఏ⤫ⓗ⏫ᐙᘓ⠏ࠊᅵⶶ࡞ࡀከࡃᏑ ᅾࡋྂ࠸⏫୪ࡳࢆṧࡋ࡚࠸ࡿࡀࠊࡇࢀࡽࡢఏ⤫ⓗ࡞ᘓ⠏≀ከࡃࡢ⿕ᐖࡀぢࡽࢀࡓ8)ࠊ9)㸦ᅗ1㸧ࠋ≉㍯ᓥᕷ ⿕ᐖࡀ㞟୰ࡋࠊቯ⿕ᐖࡢ7ࡀ㍯ᓥᕷࡢ⿕ᐖ࡛࠶ࡿࠋ ᅗ㸯 2007ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡼࡿఏ⤫ⓗᮌ㐀ᘓ⠏⿕ᐖࡢᴫせ F ಶู⿕ᐖ ).㑰 2007 ᖺ⬟Ⓩ༙ᓥᆅ㟈࡛ࡣᮌ㐀ఫᏯከࡃࡢ⿕ᐖࡀぢࡽࢀࡓࠋ㍯ᓥᕷᕷෆ࡛ࡣఏ⤫ⓗ࡞⏫ᐙᅵⶶࡀከࡃ ⿕⅏ࡋ࡚࠾ࡾࠊᆅ㟈⿕ᐖヲ⣽ㄪᰝࢆᐇࡋࡓఏ⤫ⓗ⏫ᐙFK 㑰ࡘ࠸࡚⿕ᐖ≧ἣࡢ᳨ドࢆ⾜ࡗࡓࠋ ✰Ỉ ቯ㸸79 ༙ቯ㸸100 ୍㒊ᦆയ㸸2318 ㍯ᓥ ቯ㸸510 ༙ቯ㸸1086 ୍㒊ᦆയ㸸9988 ᑿ ቯ㸸67 ༙ቯ㸸297 ୍㒊ᦆയ㸸7285 ቯᲷᩘ 100㹼 10㹼100 0㹼10 a a, b, c d e f 㟈ኸ 㟈ᗘศᕸᅗ6) a 㸧ቯࠊb 㸧ቯࠊc 㸧ᰕࡢ᭤ࡆ◚ቯࠊd 㸧ᅵቨ⿕ᐖ㸦ᅵⶶ㸧ࠊe 㸧ᅵቨ⿕ᐖ㸦እቨ㸧ࠊf 㸧ᅵⶶ⿕ᐖ b c d e f
ᪧẸᐟ㒊 ᒃఫ㒊 ┿1 FK 㑰እほ㸦す㠃㸧 ᅗ2 FK 㑰 㓄⨨ᅗ ᑐ㇟ࡋࡓ FK 㑰ࡣࠊἙཎ⏣ᕝすഃࡢྂ࠸⏫୪ࡳࢆṧࡍ⾤༊❧ᆅࡋࠊ2007 ᖺ⬟Ⓩ༙ᓥᆅ㟈࡛ࡣつᶍ༙ ቯࡢ⿕ᐖࢆཷࡅࡓࠋ㒊ศ㝵ᘓ࡚ࠊ⎰ᒇ᰿ࡢᮌ㐀㍈⤌ᵓἲࡢఫᏯ࡛࠶ࡾࠊ⠏⣙ 100 ᖺࡢᪧẸᐟ㒊ࠊᒃఫ㒊 ࡽ࡞ࡿ㸦┿1ࠊᅗ 2㸧ࠋ 2007 ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡼࡿ⿕ᐖᴫせࢆ♧ࡍࠋ࡞⿕ᐖࡣᅵቨ㸦㠃ቨ࣭ᆶࢀቨ㸧ࡢࡦࡧࠊⴠࠊᶓᯫᮦ ᥋ྜ㒊◚ᦆࡀㄆࡵࡽࢀࡓ㸦┿ 2㸧ࠋᰕࡢṧ␃ኚᙧゅࡣ᭱ 1/22rad.㸦NS ᪉ྥ㸧ࠊ1/28rad.㸦EW ᪉ྥ㸧ࡀ ㄆࡵࡽࢀࠊయࡋ࡚ࡣ1 㝵⣙ 1/30rad.ࠊ2 㝵⣙ 1/100rad.ࡢṧ␃ኚᙧゅࡀぢࡽࢀࡓ㸦ᅗ 3㸧ࠋṧ␃ኚᙧゅࡽࠊ 1 㝵 Y2㸫Y4 ᵓ㠃ࠊ2 㝵 Y6㸫Y8 ᵓ㠃ᘓ≀ࡢࡡࡌࢀࡀぢࡽࢀࡓࠋ1 㝵࠾࠸࡚ࠊᘓ≀ࡢࡡࡌࢀࡀ⏕ࡌࡓࡇ ࡽࠊ㏻ࡾᗞ㸦ᅵ㛫㸧ࡢ᥋ྜ㒊㸦X1Y4ࠊX2Y4㸧◚ᦆࡀ⏕ࡌࡓ⪃࠼ࡽࢀࡿࠋ2 㝵྿ࡁᢤࡅ㒊ศࡢୗ࡛ ᰕࡢኚᙧࡀ㐍ࢇ࡛࠾ࡾ᥋ྜ㒊ᦆയࡀㄆࡵࡽࢀࡓࠋ⭉ᮙࡀぢࡽࢀࡓᰕ⬮㸦X2Y4㸧ࡣ₽ࢀ࡚ỿୗࡀぢࡽࢀࡓࠋ ᅗ3 ᰕࡢṧ␃ኚᙧゅ⿕ᐖᴫせ ┿2 ⿕ᐖ㒊ࡢᵝᏊ ᪤ ࡢ◊✲ࡼࡿఏ⤫ⓗᮌ㐀ᘓ⠏ࡢᆅ㟈⿕ᐖഴྥ 㐣ཤࡢᆅ㟈⿕ᐖㄪᰝࡢ⤖ᯝࡘ࠸࡚ᩥ⊩ㄪᰝࢆ⾜ࡗࡓࠋୗグࡑࡢᴫせࢆ♧ࡍࠋ ཎࠊ㕥ᮌࡽࡼࡿ2000ᖺ㫽ྲྀ┴す㒊ᆅ㟈࠾ࡅࡿ⿕ᐖㄪᰝࡢ⤖ᯝࡽࠊ⏫ᐙ㢼ᘓ≀ࡢᆺⓗ࡞⿕ᐖ ࡋ࡚1㝵㒊ศࡢ๛ᛶ㊊ࡼࡿ1㝵ࡢኚᙧࡀᣲࡆࡽࢀ࡚࠸ࡿ10)ࠋෆ㒊ࡢ⿕ᐖ≧ἣࡋ࡚ࡣࠊᰕ࣭ᘓල➼ࡀഴ ᩳ࣭◚ᦆࡋ࡚࠾ࡾࠊ≉㛤ཱྀ㒊ࡢከ࠸᪉ྥ⿕ᐖࡀ೫ࡗ࡚࠸ࡓࠋಽቯࡣචࢀࠊ᭱ṧ␃ኚᙧゅ⣙1/10㹼1/7 ᥋ྜ㒊a㸦X1Y4㸧 ᥋ྜ㒊b㸦X2Y4㸧 1 㝵ഴᩳ 1 㝵 2 㝵
rad.㐩ࡋࡓᘓ≀ࡀከࡃࡳࡽࢀࡓࠋᵔᮏࡽࡼࡿ2007ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡼࡿ⿕ᐖ≧ἣ࡛ࡣࠊ㛤ཱྀࡢከ࠸1㝵㒊 ศ࡞⿕ᐖࡀぢࡽࢀࡓ11)ࠋ᭱ṧ␃ኚᙧゅࡣ1/10 rad.ࢆ㉸࠼࡚࠸ࡿࡶࡢࡶከࡃࡳࡽࢀࡓࠋᅵྎࡎࢀࡢ⏕ ࡌࡓᘓ≀ࡀ2௳ሗ࿌ࡉࢀ࡚࠸ࡿࠋྠࡌࡃ2007ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡼࡿᆅ㟈⿕ᐖ࠾࠸࡚ࠊΎỈࠊᯘࡽࡼࡿሗ ࿌࡛ẚ㍑ⓗ⿕ᐖࡢᑠࡉࡗࡓఏ⤫ⓗᮌ㐀ᘓ≀ࢆᑐ㇟ヲ⣽ㄪᰝࡀ⾜ࢃࢀ࡚࠾ࡾࠊ⪏㟈ᛶ⬟ࡢ㛵ಀࡘ࠸࡚ ሗ࿌ࡉࢀ࡚࠸ࡿ12)ࠋ⿕ᐖࡀᑠࡉ࠸ᘓ≀࡛ࡣࠊせ࡞⿕ᐖࡣᅵቨ⏕ࡌࡿࡦࡧࡀࢇ࡛࠶ࡗࡓࠋ ◚ቯ࣮ࣔࢻ ᆅ㟈⿕ᐖㄪᰝ⤖ᯝ࡞ࡽ௨ୗࡢ◚ቯ࣮ࣔࢻࡀ☜ㄆࡉࢀࡓ㸦⾲1㸧ࠋ ᆅ㟈⿕ᐖࡢከࡃࡣ1㝵ࡢ๛ᛶ㊊ࡀせᅉ࡞ࡗ࡚࠸ࡿࡀࠊࡑࢀ௨እࡢせᅉࡼࡗ࡚⿕ᐖࡢᣑࡀ⏕ࡌ࡚࠸ ࡿ⪃࠼ࡽࢀࡿࠋ⏫ᐙᘓ⠏ࡢ≉ᚩ࡛࠶ࡿ㏻ࡾᗞ㸦ᅵ㛫㸧ࡸ྿ࡁᢤࡅࡀタࡅࡽࢀࡿࡇ࡛ࠊỈᖹᵓ㠃ࡢ๛ᛶࡀ ᆒ୍☜ಖࡉࢀ࡚࠸࡞࠸ࡇࡀ≉ᚩࡋ࡚ᣲࡆࡽࢀࠊࡑࡢࡇࡣ᥋ྜ㒊ࡢ◚ᦆ࡞⬤ᛶⓗ࡞◚ቯ࣮ࣔࢻࡘ ࡞ࡀࡿ⪃࠼ࡽࢀࡿࠋࡲࡓࠊṧ␃ኚᙧゅࡀ1/10 rad.๓ᚋ㠀ᖖࡁ࠸ࡶ㛵ࢃࡽࡎಽቯ⮳ࡽ࡞࠸ఫᏯࡀ ከࡃᏑᅾࡋࡓࠋ ⾲㸯 ఏ⤫ⓗ⏫ᐙᘓ⠏ࡢ◚ቯ࣮ࣔࢻ せᅉ ⿕ᐖᴫせ 1㝵๛ᛶ㊊ ഴᩳ㸦ෆ㒊㸸ᅵቨ⿕ᐖࠊᰕࡢ᭤ࡆ◚ቯࠊᆶࢀቨࡁ⊂❧ᰕࡢ⿕ᐖ㸧 ᶓᯫᮦࡢᘬࡁᢤࡁ㸦᥋ྜ㒊ᛶ⬟㸧 ᆶࢀቨࡢ⿕ᐖ ࡡࡌࢀ㸦Ỉᖹᵓ㠃㸧 ᥋ྜ㒊ࡢᦆയ ྿ࡁᢤࡅ✵㛫㸦Ỉᖹᵓ㠃㸧 ྿ࡁᢤࡅୗࡢᰕ⿕ᐖ 㸱㸬ఏ⤫ⓗ⏫ᐙᘓ⠏ࡢᵓ㐀ᛶ⬟ホ౯ ⪏㟈デ᩿ࡼࡿ).㑰ࡢホ౯ ୍⯡デ᩿ἲ13)ࢆ⏝࠸࡚FK 㑰ࡢ⪏㟈ᛶ⬟ࡢホ ౯ࢆ⾜ࡗࡓ㸦ᅗ4㸧ࠋ ⪏㟈デ᩿㸦ୖ㒊ᵓ㐀ホⅬ㸧ࡢ⤖ᯝࡣࠊቨࡢᑡ ࡞࠸1 㝵 NS ᪉ྥ࡛ 0.3 ௨ୗ࡞ࡾࠊಽቯࡍࡿ ྍ⬟ᛶࡀ㧗࠸࠸࠺⤖ᯝࢆ♧ࡋࡓ㸦⾲2㸧ࠋࡑ ࡢࡢホⅬࡣ0.7 ๓ᚋ࡛࠶ࡗࡓࠋ୍᪉ࠊᐇ㝿ࡢ ᆅ㟈⿕ᐖ࡛ࡣつᶍ༙ቯ࡞ࡗࡓࡶࡢࡢಽቯࡣ චࢀࡓࠋ⿕ᐖࡢ㞟୰ࡋࡓ1 㝵࡛ࡣ NSࠊEW ᪉ ྥࡶṧ␃ኚᙧࡁ࡞ᕪࡣ࡞ࡃࠊ᪉ྥࡼ ࡿ⿕ᐖࡢᕪࡣ࠶ࡲࡾㄆࡵࡽࢀ࡞ࡗࡓࠋ⪏㟈デ ᩿࡛ᚓࡽࢀࡓ⤖ᯝᐇ㝿ࡢ⿕ᐖᕪࡀㄆࡵࡽࢀ ࡓࠋ ⾲2 ⪏㟈デ᩿⤖ᯝ㸦ୖ㒊ᵓ㐀㸧 㝵 ᪉ྥ ୖ㒊ᵓ㐀ホⅬ NS 0.28 㸯㝵 EW 0.67 NS 0.74 2 㝵 EW 0.78 ᆅ㟈ᛂ⟅ゎᯒࡼࡿ).㑰ࡢホ౯ D ゎᯒࣔࢹ࣭ࣝධຊᆅ㟈Ἴࡘ࠸࡚ 㠃ᅵቨࠊᆶࢀቨࡁ⊂❧ᰕࢆ⪏ຊせ⣲ࡳ࡞ࡋ࡚ࠊྛ㝵ࡢⲴ㔜̺ኚᙧ㛵ಀࡢ᥎ᐃࢆ⾜ࡗࡓ14)ࠊ15)ࠋ᭱ 1 㝵 2 㝵 ᅗ4 FK 㑰ᖹ㠃ᅗ
㻙㻝㻜㻜 㻙㻡㻜 㻜 㻡㻜 㻝㻜㻜 㻝㻡㻜 㻝㻜 㻞㻜 㻟㻜 㻠㻜 㻡㻜 㻢㻜 㼠㼕㼙㼑㻌㻔㼟㼑㼏㻚㻕 㻾 㼑 㼟 㼜㼛 㼚 㼟㼑 㻌㻰 㼑㼟 㼜㼘 㼍 㼏㼑㼙 㼑㼚㼠 㻌㻔 㼙 㼙 㻕 㻝㻲 㻞㻲 㻙㻞㻜㻜 㻜 㻞㻜㻜 㻠㻜㻜 㻢㻜㻜 㻤㻜㻜 㻝㻜 㻞㻜 㻟㻜 㻠㻜 㻡㻜 㻢㻜 㼠㼕㼙㼑㻌㻔㼟㼑㼏㻚㻕 㻾 㼑㼟 㼜 㼛㼚 㼟㼑 㻌㻰 㼑㼟 㼜㼘 㼍㼏㼑㼙 㼑㼚㼠 㻌㻔 㼙 㼙 㻕 㻝㻲 㻞㻲 ⪏ຊࡣ1㝵ࡢNS᪉ྥ33kNࠊEW᪉ྥ197kN࡞ࡾࠊ᪉ྥࡼࡾࡁࡃᕪࡀ⏕ࡌࡓࠋᚓࡽࢀࡓⲴ㔜̺ኚᙧ㛵ಀ ࢆࡶࠊゎᯒࣔࢹࣝࡢྛᒙࡢ๛ᛶࢆỴᐃࡋࡓࠋゎᯒࣔࢹࣝࡣࡏࢇ᩿㉁Ⅼ⣔ࣔࢹࣝࡋࠊP-ԥຠᯝࡣ⪃៖ࡏ ࡎゎᯒࢆ⾜ࡗࡓ㸦⾲3ࠊᅗ5㸧ࠋ ධຊἼࡣࠊᑐ㇟ࡋࡓFK㑰ࡽ⣙500m⨨ࡍࡿJMA㍯ᓥᕷ㬅⮳⏫࡛ほ ࡉࢀࡓᆅ㟈Ἴࢆ⏝࠸ࡓࠋほ ࡉࢀࡓ᭱ຍ㏿ᗘࡣ464gal࡛࠶ࡗࡓࠋゎᯒᡭἲࡣNewmarkșἲ㸦ș=1/6㸧ࢆ⏝࠸ࠊῶ⾶ࣔࢹࣝࡣึᮇ๛ᛶ ẚᆺ㸦h=0.05㸧ࡋࡓࠋ E ゎᯒ⤖ᯝ ᆅ㟈ᛂ⟅ゎᯒࡢ⤖ᯝࢆ௨ୗ♧ࡍ㸦ᅗ6㸧ࠋNS᪉ྥ࡛ࡣ1㝵ࡀ᭱⣙600mm฿㐩ࡋࠊṧ␃ኚᙧゅ⣙1/9 rad. ࠸࠺⤖ᯝࡀᚓࡽࢀࡓࠋ2㝵ࡣࢇኚᙧࡋ࡚࠸࡞࠸ࠋEW᪉ྥ࡛ࡣ1㝵ࡀ᭱⣙125mmࠊ2㝵ࡀ⣙50mmኚ ᙧࡋࠊṧ␃ኚᙧゅ⣙1/90 rad.࡛࠶ࡗࡓࠋ ᆅ㟈⿕ᐖㄪᰝࡢ⤖ᯝࡽᚓࡽࢀࡓ1㝵ṧ␃ኚᙧゅࡣࠊ᪉ྥࡼࡿᕪࡣᑡ࡞ࡃ⣙1/30 rad.࡛࠶ࡗࡓࠋᮏゎᯒ࡛ ࡣࠊ㠃ᅵቨࡢࠊᆶࢀቨࡁ⊂❧ᰕ㸦᥋ྜ㒊ᛶ⬟⪃៖㸧ࢆ⪏ຊせ⣲ࡋ࡚ホ౯ࡋ࡚࠸ࡿࡀࠊᐇ㝿ࡢᆅ 㟈⿕ᐖࡣ␗࡞ࡿ⤖ᯝ࡞ࡗࡓࠋࡇࡢࡇࡽࠊྛせ⣲ࡢ⪏ຊせ⣲ࢆホ౯ࡍࡿࡔࡅ࡛࡞ࡃࠊ㏻ࡾᗞ㸦ᅵ㛫㸧 ࡸ྿ࡁᢤࡅࢆ᭷ࡍࡿ࠸࠺ࡼ࠺࡞ࠊ⏫ᐙᘓ⠏≉᭷ࡢᵓ㐀ⓗ࡞≉ᚩࢆホ౯ࡍࡿᚲせࡀ࠶ࡿ⪃࠼ࡽࢀࡿࠋ ⾲3 ゎᯒࣔࢹࣝࣃ࣓ࣛࢱ ᪉ྥ 㝵 㔜㔞 (kN) 㧗ࡉ (mm) ึᮇ๛ᛶ (kN/mm) 1 170 2750 1.07 NS 2 287 2400 6.14 1 170 2750 7.81 EW 2 287 2400 6.26 ᅗ6 ้Ṕᛂ⟅ゎᯒ ゎᯒ⤖ᯝ ホ౯᪉ἲ㛵ࡍࡿ⪃ᐹ ᮏ◊✲࡛⾜ࡗࡓ⪏㟈デ᩿ࠊᆅ㟈ᛂ⟅ゎᯒࡼࡿホ౯ࡣ࠸ࡎࢀࡶᅵቨࠊᆶࢀቨࡁ⊂❧ᰕࢆ⪏ຊせ⣲ࡋ࡚ ࡢホ౯᪉ἲ࡛࠶ࡿࠋ⏫ᐙᘓ⠏ࡢᆅ㟈⿕ᐖࡼࡃぢࡽࢀࡿ◚ቯ࣮ࣔࢻࡢ࠺ࡕ1㝵ࡢ๛ᛶ㊊ࡼࡿ⿕ᐖࡣẚ㍑ 㸦1㸧ධຊἼᛂ⟅ຍ㏿ᗘ NS ᪉ྥ 㸦2㸧ධຊἼᛂ⟅ຍ㏿ᗘ EW ᪉ྥ 㻙㻢㻜㻜 㻙㻠㻜㻜 㻙㻞㻜㻜 㻜 㻞㻜㻜 㻠㻜㻜 㻢㻜㻜 㻝㻡 㻞㻜 㻞㻡 㻟㻜 㼠㼕㼙㼑㻌㻔㼟㼑㼏㻚㻕 㻾 㼑㼟 㼜㼛㼚 㼟㼑 㻌㻭 㼏㼏 㼑 㼘㼑 㼞㼍 㼠㼕 㼛㼚 㻌㻔 㼓㼍 㼘㻕 㻵㼚㼜㼡㼠㻌㼣㼍㼢㼑㻌㻔㻺㻿㻕 㻝㻲 㻞㻲 㻙㻢㻜㻜 㻙㻠㻜㻜 㻙㻞㻜㻜 㻜 㻞㻜㻜 㻠㻜㻜 㻢㻜㻜 㻝㻡 㻞㻜 㻞㻡 㻟㻜 㼠㼕㼙㼑㻌㻔㼟㼑㼏㻚㻕 㻾 㼑㼟 㼜㼛 㼚㼟 㼑㻌㻭 㼏㼏㼑㼘 㼑㼞 㼍㼠 㼕㼛 㼚㻌 㻔㼓 㼍 㼘㻕 㻵㼚㼜㼡㼠㻌㼣㼍㼢㼑㻌㻔㻱㼃㻕 㻝㻲 㻞㻲 㸦3㸧ᛂ⟅ኚ NS ᪉ྥ 㸦4㸧ᛂ⟅ኚ EW ᪉ྥ M2 M1 K1 K2 ᅗ5 ゎᯒࣔࢹࣝ⨨
ⓗホ౯࡛ࡁ࡚࠸ࡿ⪃࠼ࡽࢀࡿࠋࡲࡓࠊᶓᯫᮦࡢᘬࡁᢤࡁࡼࡿᆶࢀቨࡁ⊂❧ᰕࡢ⿕ᐖࡣࠊᆶࢀቨࡁ⊂ ❧ᰕࡢホ౯ᶓᯫᮦ᥋ྜ㒊ࡢᛶ⬟ࢆຍࡍࡿࡇ࡛ホ౯ྍ⬟࡞ࡿࠋࡋࡋࠊࡡࡌࢀࡸ྿ࡁᢤࡅ✵㛫࡞ ࡢỈᖹᵓ㠃ၥ㢟ࡀ㉳ᅉࡍࡿ◚ቯ࣮ࣔࢻࡘ࠸࡚ࡣ⪃៖࡛ࡁ࡚࠾ࡽࡎࠊホ౯⤖ᯝᐇ㝿ࡢᆅ㟈⿕ᐖ␗࡞ࡿ Ⅼࡀከ࠸ࠋከࡃࡢ⏫ᐙᘓ⠏ࡣࡇࢀࡽࡢせᅉ࡞ࡿ㏻ࡾᗞ㸦ᅵ㛫㸧ࡸ྿ࡁᢤࡅࡀタࡅࡽࢀ࡚࠾ࡾࠊ⏫ᐙᘓ⠏ ࡢᵓ㐀ᛶ⬟ࢆⓗ☜ホ౯ࡍࡿࡓࡵࡣࠊ྿ࡁᢤࡅ㒊ࡸỈᖹᵓ㠃ࡢホ౯ࡀ㔜せ࡛࠶ࡿ⪃࠼ࡽࢀࡿࠋỈᖹᵓ㠃 ࡢᛶ⬟ࢆ㋃ࡲ࠼ࠊᘓ≀యࡋ࡚ࡢᵓ㐀≉ᛶࢆ⪃៖ࡋࡓ⡆᫆࡞ホ౯ᡭἲࢆᵓ⠏ࡍࡿᚲせࡀ࠶ࡿࠋ 㸲㸬⤖ㄽ ᮏ◊✲࡛ࡣࠊᆅ㟈⿕ᐖㄪᰝ⤖ᯝᇶ࡙࠸࡚ఏ⤫ⓗᮌ㐀⏫ᐙᘓ⠏ࡘ࠸࡚◚ቯ࣮ࣔࢻࡢᢕᥱᵓ㐀ᛶ⬟ホ౯ ࢆ⾜ࡗࡓࠋ 1㸧ఏ⤫ⓗᮌ㐀⏫ᐙᘓ⠏ࡢ◚ቯ࣮ࣔࢻࡣࠊ1㝵ࡢ๛ᛶ㊊ࡼࡿ⿕ᐖࡀከ࠸ࠋࡑࡢࡢ◚ቯ࣮ࣔࢻࡋ࡚ࠊ ᶓᯫᮦᘬࡁᢤࡁࡼࡿᆶࢀቨࡢ⿕ᐖࠊࡡࡌࢀࡼࡿ᥋ྜ㒊⿕ᐖࠊ྿ࡁᢤࡅ㒊ࡢᰕ⿕ᐖ࠸࠺ࡼ࠺࡞ࠊ᥋ྜ㒊 ᛶ⬟ࠊỈᖹᵓ㠃㉳ᅉࡍࡿ◚ቯ࣮ࣔࢻࡀ☜ㄆࡉࢀࡓࠋ 2㸧⌧ᅾ⏝࠸ࡽࢀࡿ⪏㟈デ᩿࡞ࡢᵓ㐀ᛶ⬟ホ౯ᡭἲࡣࠊ๛ᛶ㊊ࡼࡿ◚ቯ࣮ࣔࢻࡘ࠸࡚ࡣホ౯ࡍࡿࡇ ࡀྍ⬟࡛࠶ࡿࠋࡋࡋࠊ⏫ᐙ≉᭷ࡢỈᖹᵓ㠃㉳ᅉࡍࡿ◚ቯ࣮ࣔࢻࡘ࠸࡚ࡣࠊỈᖹᵓ㠃㛵ࡍࡿせ⣲ࢆ ⪃៖࡛ࡁ࡚࠸࡞࠸ࡓࡵᐇ㝿ࡢᆅ㟈⿕ᐖࢆホ౯ࠊ᳨ドࡍࡿࡇࡣᅔ㞴࡛࠶ࡿࠋ ᚋࡣࠊᆅ㟈⿕ᐖㄪᰝ⤖ᯝࢆඖࠊ⏫ᐙᘓ⠏≉᭷ࡢ㏻ࡾᗞ㸦ᅵ㛫㸧ࡸ྿ࡁᢤࡅ࡞ࡢỈᖹᵓ㠃㛵ࡍࡿホ ౯ࢆྲྀࡾධࢀ࡚ᵓ㐀ᛶ⬟ホ౯ࢆ⾜࠼ࡿࡼ࠺ࠊホ౯ᡭἲࡢ᳨ウࠊᵓ⠏ࡀᚲせ࡛࠶ࡿ⪃࠼ࡽࢀࡿࠋ ㅰ㎡㸸ᮏ◊✲ࢆ⾜࠺࠶ࡓࡗ࡚ᆅ㟈⿕ᐖㄪᰝࡈ༠ຊ࠸ࡓࡔ࠸ࡓྂ❑ᵝࠊⴗ㔝⣖୍㑻Ặ㸦ⴗ㔝ࢺ࢚ࣜ㸧ࠊ ᯇ⏣ᫀὒẶ㸦ᮾὒᏛ㸧ࠊ༓ⴥ୍ᶞẶ㸦ᮾி⌮⛉Ꮫ㸧ࠊᮾிᏛ⸨⏣◊✲ᐊࠊ㤳㒔Ꮫᮾி⸨⏣◊✲ᐊࡢ ⓙᵝㅰពࢆ♧ࡋࡲࡍࠋ ཧ⪃ᩥ⊩ 1) ᮡᒣⱥ⏨㸸Ụᡞ௦ᘓ⠏ࡉࢀࡓ㎰ᐙࡢỈᖹຍຊヨ㦂ࡢ⤖ᯝ㸪᪥ᮏᘓ⠏Ꮫᵓ㐀⣔ㄽᩥሗ࿌㞟㸪No. 360㸪 pp.23-30㸪1986.2 2) ఏ⤫ᵓἲᮌ㐀ᘓ≀ືྎᐇ㦂◊✲㸸ఏ⤫ᵓἲᮌ㐀ᘓ≀ࡢ⪏㟈ᛶࢆ᳨ドࡍࡿ㸪2007 3) ᪂ᒃ⸛Ꮚ㸪㕥ᮌ⚈அ㸸ᖖᚤືィ ࡽ᥎ᐃࡉࢀࡿி⏫ᐙࡢືᛶ≧㸪᪥ᮏᘓ⠏Ꮫᵓ㐀⣔ㄽᩥ㞟㸪No. 613㸪 pp. 43-50㸪2007.3 4) 㡲⏣㐩㸪㕥ᮌ⚈அ㸸ி⏫ᐙࡢ⪏㟈ᛶ⬟ホ౯⪏㟈⿵ᙉタィἲ㸪᪥ᮏᘓ⠏Ꮫᵓ㐀⣔ㄽᩥ㞟㸪No. 616㸪pp.149-156㸪2007.6 5) ⏣ῡᩔኈ㸪ᑠᯇᖾᖹ㸸ி⏫ᐙᆺᅵቨࡢỈᖹࡏࢇ᩿ᛶ⬟㸪᪥ᮏᘓ⠏Ꮫᵓ㐀⣔ㄽᩥ㞟㸪No. 605㸪pp.143-150㸪 2006.7 6) Ẽ㇟ᗇ㸪⅏ᐖᆅ㟈࣭ὠἼ㏿ሗ ᖹᡂ19ᖺ(2007ᖺ)⬟Ⓩ༙ᓥᆅ㟈㸪 http://www.seisvol.kishou.go.jp/eq/2007_03_25_noto/saigai.pdf㸪2007ᖺ4᭶ 7) ᾘ㜵ᗇ㸪ᖹᡂ19ᖺ(2007ᖺ)⬟Ⓩ༙ᓥᆅ㟈㸦➨㸲㸶ሗ㸧㸪 2007.12
8) Hiromi. S., Yoshinari. S. and Kaori. F.: Study on the Structural Performance of Traditional Timber Townhouse in Japan based on the Disaster of the Noto Hanto Earthquake in 2007, 2008 World Conference on Timber Engineering, June 2008, CDR 9) ⸨⏣㤶⧊㸸2007ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡢ⿕ᐖㄪᰝ ఏ⤫ⓗᮌ㐀ᘓ⠏ࡢᆅ㟈⿕ᐖ㸪ᘓ⠏㜵⅏㸪pp.38-43㸪2007.8 10) ཎ⏨㸪㕥ᮌ⚈அ㸸2000ᖺ㫽ྲྀす㒊ᆅ㟈࠾ࡅࡿᮌ㐀ᘓ≀ࡢᵓ㐀≉ᛶ⿕ᐖ㸪᪥ᮏᘓ⠏Ꮫᵓ㐀⣔ㄽᩥ㞟㸪 No. 561㸪pp. 161-167㸪2002.11 11) ᵔᮏᩗ㸸ᖹᡂ19ᖺ⬟Ⓩ༙ᓥᆅ㟈ࡼࡿᮌ㐀ᘓ⠏≀ࡢ⿕ᐖ≧ἣ㸪᪥ᮏᘓ⠏ᏛᏛ⾡ㅮ₇᱾ᴫ㞟㸪C-1㸪pp. 5-6㸪2007 12) ΎỈ⚽㸪ᯘᗣ⿱㸸2007ᖺ⬟Ⓩ༙ᓥᆅ㟈࠾ࡅࡿ⿕⅏ᮌ㐀ᘓ≀ࡢ⪏㟈ᛶ⬟ᆅᇦ≉ᛶࡢホ౯㸪᪥ᮏᘓ⠏Ꮫᵓ 㐀⣔ㄽᩥ㞟㸪Vol. 73㸪No. 631㸪pp. 1503-1510㸪2008.9 13) ᅜᅵ㏻┬ఫᏯᒁᘓ⠏ᣦᑟㄢ㸸ᮌ㐀ఫᏯࡢ⪏㟈デ᩿⿵ᙉ᪉ἲ ᮌ㐀ఫᏯࡢ⪏㟈⢭ᐦデ᩿⿵ᙉ᪉ἲ㸦ᨵゞ∧㸧㸪 ㈈ᅋἲே᪥ᮏᘓ⠏㜵⅏༠㸪2004.7 14) Ἑྜ┤ே㸸ఏ⤫ⓗᮌ㐀ᘓ⠏≀ࡢື≉ᛶ ࡑࡢ9㸪᪥ᮏᘓ⠏ᏛᏛ⾡ㅮ₇᱾ᴫ㞟㸪C-1㸪pp.145-146㸪2000.9 15) బ⸨ᘯ⨾㸪ᆏᮏຌ㸸⌧ᆅᐇ㦂ࡼࡿఏ⤫ⓗᮌ㐀ఫᏯࡢᵓ㐀ᛶ⬟㛵ࡍࡿ◊✲ ᒣཱྀ┴ࡢ㎰ᐙࢆᑐ㇟ࡋࡓ㟼ⓗ Ỉᖹຍຊᐇ㦂㸪᪥ᮏᘓ⠏Ꮫᵓ㐀⣔ㄽᩥ㞟㸪No. 602㸪pp.187-194㸪2006.4
