近畿大学次世代基盤技術研究所報告 Vol. 5（2014）79－88➉⧄⥔⿵ᙉࢭ࣓ࣥࢺ」ྜᮦᩱࡢ㛤Ⓨ࡜ά⏝࡟㛵ࡍࡿ◊✲

Study on Application and Development of Cement Composites
Reinforced with Bamboo Fibers         ◊✲௦⾲⪅ ᕤᏛ㒊ᘓ⠏Ꮫ⛉*1  ෸ᩍᤵ ᑎ஭ 㞞࿴                 Masakazu Terai
Environmental destruction such as pollution of air and water has been occurring in someregions by rapid development and production of materials like iron, steel, glass, cement andaluminum that use limited mineral resources. On the other hand, plants and fibers areannually reproducible clean resources. Bamboo is a unique group of gigantic grasses the culm ofwhich originates in underground rhizomes. It grows naturally in many parts around the world
country but some species are artificially planted. Bamboo forests are found across tropic andsub-tropic zones between latitudes of about 40° south, i.e. areas with mean annual
temperatures of from 20Υ to 30Υ. Bamboo suitable for water pipes grows at altitudes from 20
to 3000 meters. The plant is fully mature at an age of three to four years. This paper
investigates the application to explore the possibility of bamboo fiber reinforced cementcomposites. Some experiments on bamboo fiber reinforced cement composites with theparameters of mix proportion and the shape of bamboo fiber has been carried out. The
mechanical properties and the fresh workability on the bamboo fiber reinforced cementcomposites are studied.
Keywords: Cement Composite, Bamboo Fiber, Compressive Strength, Bending Strength,
Splitting Tensile Strength, Sand-total Aggregate Ratioࡣࡌࡵ࡟ࢥࣥࢡ࣮ࣜࢺࡣ㸪ᘬᙇᙉᗘࡀప࠸ࡓࡵ⇕ࡸ஝⇱㸪ᆅ㟈࡞࡝ࡢእຊ࡟ࡼࡗ࡚㸪ࡦࡧࢃࢀࡀ⏕ࡌࡸࡍ࠸ᮦᩱ࡛࠶ࡿ㸬ࡑࡢࡓࡵ㸪㏻ᖖࢥࣥࢡ࣮ࣜࢺ〇ࡢᵓ㐀≀ࡣ㸪㕲࡞࡝ࡢ⿵ᙉᮦࢆ㓄ࡋ࡚ࡦࡧࢃࢀࢆ㜵࠸࡛࠸ࡿ㸦㕲➽ࢥࣥࢡ࣮ࣜࢺᵓ㐀ࡸ⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺ࡞࡝㸧㸬ⴭ⪅ࡽࡣ㸪ࢥࣥࢡ࣮ࣜࢺࡢࡦࡧࢃࢀࢆ㜵Ṇࡍࡿࡓࡵ࡟㸪㗰ᮦ࡟௦ࢃࡿᮦᩱ࡜ࡋ࡚ࠕ➉ࠖࢆά⏝ࡋࡓᮦᩱ࣭ᵓ㐀ࡢ㛤Ⓨ◊✲ࢆ⾜ࡗ࡚ࡁࡓ㸬ࡇࢀࡲ࡛ࡢ◊✲࡛ࡣ㸪➉ࢆࢥࣥࢡ࣮ࣜࢺᵓ㐀≀ࡢ⿵ᙉᮦ㸦➉୺➽㸧࡟ࡋ࡚㸪㛤Ⓨ㏵ୖᅜ࡟࠾ࡅࡿ⪏㟈ᘓ⠏࠾ࡼࡧ⪏㟈⿵ᙉᢏ⾡࡟฼⏝ࡍࡿࡓࡵ࡟㸪ᱱ㸪ᰕ㸪ᗋ∧࡞࡝ࡢ㒊ᮦᐇ㦂ࢆ⾜ࡗ࡚ࡁࡓ㸦ᅗ 1㸧㸬㕲➽ࢥࣥࢡ࣮ࣜࢺᵓ㐀ࡣ㸪㕲࡜ࢥࣥࢡ࣮ࣜࢺ࡜࠸࠺஧ࡘࡢᮦᩱࡑࢀࡒࢀࡢ㛗ᡤࢆά࠿ࡋ࡚㸪࠾஫࠸ࡢࢹ࣓ࣜࢵࢺࢆ⿵࠺ᙧ࡛⌮᝿ⓗ࡞」ྜᮦᩱ࡜ࡋ࡚ᡂ❧ࡋ࡚࠸ࡿࡀ㸪㕲ࢆ౑ࢃ࡞࠸◊✲ࢆࡋ࡚࠸ࡿࡢ࡟ࡣ⌮⏤ࡀ࠶ࡿ㸬㏆ᖺ㸪㗰ᮦࡢ౯᱁ࡀ㧗㦐ࡋ࡚࠾ࡾ㸪ࡲࡓⓎᒎ㏵ୖᅜ࡛ࡣ㧗౯࡞㗰ᮦࡣධᡭࡀ㞴ࡋࡃ㸪኱㔞౑⏝ࡣไ㝈ࡉࢀ࡚࠸ࡿ⌧≧ࡀ࠶ࡿ㸬ࡑࡢࡓࡵ㸪ᮏ᮶⿵ᙉࡀᚲせ࡞ࢥࣥࢡ࣮ࣜࢺᵓ㐀≀࡟࠾࠸࡚㸪༑ศ࡞⿵ᙉࡀ࡛ࡁ࡚࠸࡞࠸ᆅᇦࡀୡ⏺࡟ࡣᗈࡃศᕸࡋ࡚࠸ࡿ㸬ࡲࡓ㸪㗰ᮦࡢ⏕⏘࡟ࡣ኱㔞ࡢ໬▼⇞ᩱࡀ౑⏝ࡉࢀࡿࡓࡵ㸪Ⅳ㓟
࢞ࢫ᤼ฟࡢほⅬ࠿ࡽ㸪⎔ቃၥ㢟࡬ࡢ㓄៖࠿ࡽ௒ᚋࡣ⏕⏘ࡀไ㝈ࡉࢀ࡚࠸ࡃࡇ࡜ࡶ⪃࠼ࡽࢀࡿ㸬ࡑࡇ࡛㸪㗰ᮦࢆ౑⏝ࡋ࡞࠸ᵓ㐀≀ࡢ㛤Ⓨࡣ㸪ே㢮ࡢᮍ᮶࡟࠾࠸࡚㸪ព࿡ࡢ࠶ࡿࡇ࡜࡛࠶ࡿ㸬*ཎ✏ཷ௜ 2014 ᖺ 5 ᭶ 12 ᪥
*1 ࠛ739-2116 ᮾᗈᓥᕷ㧗ᒇ࠺ࡵࡢ㎶ 1 ␒  E-Mail terai@hiro.kindai.ac.jp

ᅗ 1. ➉➽ࢥࣥࢡ࣮ࣜࢺࡢᐇ㦂◊✲(1)㹼(3)－ 79 －ᮏ◊✲࡛᝿ᐃࡋ࡚࠸ࡿࢥࣥࢡ࣮ࣜࢺࡢ“ࡦࡧࢃࢀ”࡜ࡣ㸪ᆅ㟈ຊ࡞࡝ࡢ኱ࡁ࡞ຊࡀస⏝ࡋ࡞ࡃ࡚ࡶⓎ⏕ࡍࡿࠕ஝⇱ࡦࡧࢃࢀࠖࡸࠕ཰⦰ࡦࡧࢃࢀࠖ࡞࡝ࡢᚤ⣽࡞ࡦࡧࢃࢀࢆᣦࡋ㸪ࡇࢀࡽࡀࢥࣥࢡ࣮ࣜࢺᵓ㐀≀ࡢᬒほࢆᦆࡡ㸪ᵓ㐀≀࡜ࡋ࡚ࡢ๛ᛶపୗࢆᘬࡁ㉳ࡇࡍཎᅉ࡟ࡶ࡞ࡗ࡚࠸ࡿ㸬㏻ᖖ㸪ࡦࡧࢃࢀᢚไ࡟ࡣྜᡂ⧄⥔ࡸ㗰⧄⥔ࢆΰධࡍࡿࡀ㸪ᮏ◊✲࡛ࡣኳ↛⣲ᮦ࡛࠶ࡿࠕ➉⧄⥔ࠖࢆ౑⏝ࡍࡿࡇ࡜ࡀ≉Ⰽ࡛࠶ࡿ㸬ࡇࡢ࡜ࡁ࡟ၥ㢟࡜࡞ࡿࡢࡣ㸪ࢥࢫࢺ࡜⪏ஂᛶ࡛࠶ࡿ㸬ࢥࢫࢺࡢ㠃ࡣ㸪᪥ᮏ࡛ࡣၥ㢟࡞࠸㸬ᡂ㛗ࡀ᪩ࡃ㸪ຍᕤࡀᐜ᫆࡞ࡢ࡛㸪పࢥࢫࢺ࡛኱㔞࡟➉⧄⥔ࢆ⏕⏘ࡍࡿࡇ࡜ࡣྍ⬟࡛࠶ࡿ㸬୍᪉ࡢ⪏ஂᛶࡢ㠃࡛࠶ࡿࡀ㸪࢔ࣝ࢝ࣜᛶࡢࢭ࣓ࣥࢺࡢ୰࡟ࢭ࣮ࣝࣟࢫࡀ୺ᡂศࡢ➉ࢆΰධࡍࡿࡇ࡜࡛㸪⤌⧊ࡀ◚ቯࡉࢀᙉᗘࡀୖࡀࡽ࡞࠸࡜࠿㛗ᮇⓗ࡞ࡦࡧࢃࢀᢚไࡀ୙㊊ࡍࡿࡇ࡜ࡀ᪤ ࡢ◊✲࡛ࡣᣦ᦬ࡉࢀ࡚࠸ࡿ(4)㸬ࡋ࠿ࡋ࡞ࡀࡽ㸪ⴭ⪅ࡽࡀࡇࢀࡲ࡛⾜ࡗ࡚ࡁࡓᇶ♏ⓗ࣭ணഛⓗ࡞◊✲࡛ࡣ㸪ᐇ㦂ࢹ࣮ࢱࡀ༑ศ࡜ࡣゝ࠼ࡎ㸪᪤ ࡢ◊✲࡛ᣦ᦬ࡉࢀࡓၥ㢟Ⅼࡀ᫂☜࡟ࡣ࡞ࡽ࡞࠿ࡗࡓ㸬ࡑࡇ࡛㸪㐣ᖺᗘࡢᐇ㦂ⓗ◊✲(5),(6)ࢆ᭦࡟Ⓨᒎࡉࡏ࡚ᐇ㦂ࢹ࣮ࢱࢆ⵳✚ࡋ㸪ࠕ➉⧄⥔⿵ᙉࢭ࣓ࣥࢺ」ྜᮦ
ᩱࠖࡢᐇ⏝໬࡟ྥࡅ࡚ࡢ㊊ࡀ࠿ࡾ࡜ࡋࡓ࠸㸬ᮏ◊✲࡛ࡣ㸪➉⧄⥔ࢆࢥࣥࢡ࣮ࣜࢺ࡟ΰධࡍࡿࡇ࡜࡟ࡼࡾ㸪పࢥࢫࢺ࡛๤ⴠࡸࡦࡧࢃࢀࡢ㜵Ṇ㸪ຊᏛᛶ≧ࡢᨵၿࡀ࡛ࡁࡿ᪉⟇ࡀ࡞࠸࠿ࢆ⪃࠼㸪➉⧄⥔⿵ᙉ」ྜᮦᩱࡢ〇㐀࡟㛵ࡍࡿྍ⬟ᛶࢆ᥈ࡾ㸪ᇶ♏ⓗ࡞ᐇ㦂ࢆ⾜ࡗࡓ㸬ᐇ㦂ᴫせ㐣ᖺᗘ⾜ࡗࡓᐇ㦂࡛ࡣ㸪౑⏝ࡋࡓ⧄⥔ࡀ⣽ࡃ㸦0.3mmゅ㸧㸪⿵ᙉᮦ࡜ࡋ࡚᭷ຠ࡟స⏝ࡋ࡞࠿ࡗࡓ࡜⪃࠼࡚࠸ࡿ㸬ࡑࡇ࡛㸪ᐇ㦂ኚᩘࡢ୍ࡘ࡜ࡋ࡚㸪⧄⥔ᙧ≧ࡸ⧄⥔ᑍἲࢆィ⏬ࡍࡿ㸬➉ࢆ≉ᐃࡢᙧ≧࡟ຍᕤࡍࡿ࡜ࢥࢫࢺࡀୖࡀࡿࡓࡵ㸪ᮏ◊✲ࡢ⫼ᬒࢆ㋃ࡲ࠼⌧ᐇⓗ࡛ࡣ࡞࠸ࡢ࡛㸪⮬↛⣲ᮦࢆά࠿ࡋࡓ⧄⥔ᙧ≧ࢆ⪃࠼ࡿ㸬ኴࡉࡸ㛗ࡉࢆኚᩘ࡜ࡋ࡚㸪⿵ᙉຠᯝࡢ㐪࠸ࢆ☜ㄆࡍࡿ㸬ࡲࡓ㸪㐣ᖺᗘ⾜ࡗࡓᐇ㦂࡛ࡣ㸪⢒㦵ᮦ㸦◁฼㸧ࢆ㏻ᖖࡢࢥࣥࢡ࣮ࣜࢺ୪ࡳ࡟ධࢀࡓ㸬᪋ᕤࢆ㋃ࡲ࠼㸪㦵ᮦࡀ኱㔞࡟ධࡿ࡜⧄⥔ࡀ᭷ຠ࡟స⏝ࡋ࡞࠸ࡓࡵ㸪㦵ᮦ㔞ࢆపῶࡋ࡚➉⧄⥔ࡢ⿵ᙉࡀ᭷ຠ࡟ᶵ⬟ࡍࡿࡼ࠺࡞ࠕࢭ࣓ࣥࢺ」ྜᮦᩱࠖ࡜ࡋ࡚ࡢㄪྜ
タィ᪉ἲࢆᥦ᱌ࡋࡓ࠸㸬 ᐇ㦂ィ⏬࠾ࡼࡧᴫせᮏㄽ࡛ࡣ㸪ḟࡢ4ࡘࡢ஦㡯㸦(a)㹼(d)㸧ࡘ࠸࡚ᐇ㦂ࢆ⾜࠸᳨ウࡋࡓ㸬D ᪋ᕤᛶ࡟㛵ࡍࡿ᳨ウ㸦ணഛᐇ㦂㸧ࢥࣥࢡ࣮ࣜࢺ୰ࡢ✵Ẽࢆᢤࡃ᪉ἲࡣ2✀㢮࠶ࡿ㸬᣺ືࢆ୚࠼ࡿ᪉ἲ࡜㸪໬Ꮫΰ࿴๣ᮦࢆධࢀ࡚✵Ẽศᩓࡍࡿࡇ࡜࡛ᢤࡅࡸࡍࡃࡍࡿ᪉ἲ࡛࠶ࡿ㸬㐣ཤࡢᐇ㦂࡛ࡣ㸪᣺ືࢆ୚࠼ࡍࡂࡿ࡜㔜࠸㦵ᮦࡣỿࡳ㸪㍍࠸➉ࡣᾋ࠸࡚ࡃࡿࡓࡵ㸪༑ศ࡞᣺ືࡣ୚࠼ࡎ౪ヨయࢆస〇ࡋ࡚࠸ࡓ㸬ࡇࡢࡓࡧࡢ◊✲࡛ࡣ㸪〇సࡢ᪉ἲ࡜᣺ື᫬㛫ࢆ⟶⌮ࡋ࡚㸪ෆ㒊≧ែ࡟㐪࠸ࡀ⏕ࡌࡿ࠿࡝࠺࠿ࢆ᳨ドࡍࡿ㸬ࢸ࣮ࣈࣝࣂ࢖ࣈࣞ
࣮ࢱ࣮࡟஌ࡏ࡚㸪0㸪30㸪60㸪120⛊࡜᣺ື᫬㛫ࢆኚ࠼࡚౪ヨయࢆసᡂࡋ㸪ᐇ㦂⤖ᯝࡢ㐪࠸ࡸෆ㒊ࡢ≧ែ㸦✵Ẽࡢᢤࡅලྜࡸ⧄⥔࣭㦵ᮦࡢศ㞳࡞࡝㸧ࢆほᐹࡍࡿ㸬E ➉⧄⥔ᙧ≧ࡢ㐪࠸࡟ࡼࡿᙳ㡪㸦$ࢩ࣮ࣜࢬ㸧➉⧄⥔ࡀ⿵ᙉᮦ࡜ࡋ࡚᭷ຠ࡟ാࡃࡓࡵ࡟㸪➉⧄⥔ࡢ᩿㠃ᙧ≧ࡸᑍἲ࡟ࡘ࠸᳨࡚ウࡍࡿ㸬ᐇ㦂ኚᩘࡢ୍ࡘ࡜ࡋ࡚㸪⧄⥔ᙧ≧ࡸ⧄⥔ᑍἲࢆᵝࠎ࡟ኚ໬ࡉࡏࡓ౪ヨయࢆィ⏬ࡋ㸪ᙉᗘヨ㦂ࢆ⾜࠺㸬➉ࢆ≉ᐃࡢᙧ≧࡟ຍᕤࡍࡿ࡜ࢥࢫࢺࡀୖࡀࡿࡓࡵ㸪ᮏ◊✲ࡢ⫼ᬒࢆ㋃ࡲ࠼⌧ᐇⓗ࡛ࡣ࡞࠸ࡢ࡛㸪⮬↛⣲ᮦࢆά࠿ࡋࡓ⧄⥔ᙧ≧ࢆᥦ᱌ࡋࡓ࠸㸬ኴࡉࡸ㛗ࡉࢆኚᩘ࡜ࡋࡓ㸪⿵ᙉຠᯝࡢ㐪࠸ࢆ☜ㄆࡍࡿ㸬⧄⥔ࡢ᩿㠃✚ࢆኚ࠼ࡓࡶࡢ࡜ࡋ࡚㸪➉ࡦࡈ㸦Ǘ1.8mm㸧࣭
ྠ1/2࣭➉ࢳࢵࣉ㸦0.3mm×2.5mmࡢᯈ≧㸧ࢆ᳨ウࡋ࡚࠸ࡿ㸬㐣ཤ࡟ᐇ㦂ࡋࡓ➉⧄⥔㸦0.7mm×0.7mm㸧࡟ẚ࡭ࡿ࡜㸪ࡑࢀࡒࢀ⣙5㸪2.5㸪1.5ಸ⛬ᗘࡢ᩿㠃✚࡛࠶ࡾ㸪⿵ᙉຠᯝࡢ㐪࠸ࢆẚ㍑᳨ウ࡛ࡁࡿ㸬F 㓄ྜタィࡢ᳨ウ㸦%ࢩ࣮ࣜࢬ㸧⢒㦵ᮦ㸦◁฼㸧ࢆ㏻ᖖࡢࢥࣥࢡ࣮ࣜࢺ୪ࡳ࡟ධࢀࡓ㸬
᪋ᕤࢆ㋃ࡲ࠼㸪㦵ᮦࡀ኱㔞࡟ධࡿ࡜⧄⥔ࡀ᭷ຠ࡟స⏝ࡋ࡞࠸ࡓࡵ㸪㦵ᮦ㔞ࢆపῶࡋ࡚➉⧄⥔ࡢ⿵ᙉࡀ᭷ຠ࡟ᶵ⬟ࡍࡿࡼ࠺࡞ࠕࢭ࣓ࣥࢺ」ྜᮦᩱࠖ࡜ࡋ࡚ࡢㄪྜタィ᪉ἲࢆᥦ᱌ࡋࡓ࠸㸬ࡉࡽ࡟㸪Ỉࢭ࣓ࣥࢺẚࡸ⧄⥔ΰධ㔞ࡶኚືせᅉ࡜ࡋ࡚ㄪ〇ࡋ㸪ᇶ♏ࢹ࣮ࢱࡢ⵳✚ࢆ⾜࠺㸬G ໬Ꮫΰ࿴๣ࡀ➉࡟ཬࡰࡍᙳ㡪㸦&ࢩ࣮ࣜࢬ㸧
3✀㢮ࡢ␗࡞ࡿΰ࿴๣ࢆ౑⏝ࡋࡓࣔࣝࢱ࡛ࣝ➉ࡢ⾲㠃ࢆ◳ࡵ࡚㸪1㸪6㸪12࠿᭶⛬ᗘ㣴⏕ࡋࡓᚋ㸪➉ࡢᙉᗘࡀ࡝
ࡢࡼ࠺࡟ኚ໬ࡍࡿ࠿㸦࠶ࡿ࠸ࡣኚ໬ࡋ࡞࠸࠿㸧ࢆ☜ㄆࡍࡿ㸬໬Ꮫΰ࿴๣ࡣ㸪⏝㏵࡟ᛂࡌࡓရ㉁つ᱁ࡀ࠶ࡾ㸪ᡂศࡶከᒱ࡟Ώࡗ࡚࠸ࡿ㸬Cࢩ࣮ࣜࢬ࡛ࡣࠊ໬Ꮫΰ࿴๣ࡢ࡝ࡢᡂศࡀ➉ࡢ⤌⧊࡟࡜ࡗ࡚ᙳ㡪ࡀ࠶ࡿࡢ࠿㸦࠶ࡿ࠸ࡣᙳ㡪࡞࠸ࡢ࠿㸧ࢆ㸪ᐇ㦂⤖ᯝ࡟↷ࡽࡋ࡚⛉Ꮫⓗ࡞どⅬ࡛࣓࢝ࢽࢬ࣒ࢆ᫂ࡽ࠿࡟ࡍࡿ㸬 ౑⏝ᮦᩱࢭ࣓ࣥࢺࡣ㸪ᬑ㏻࣏ࣝࢺࣛࣥࢻࢭ࣓ࣥࢺࢆ౑⏝ࡋࡓ㸬⢒㦵ᮦࡣ㸪ᗈᓥ┴ᗉཎᕷすᇛ⏫኱బ⏘ࡢ○▼㸪⣽㦵ᮦࡣ㸪ᓥ᰿┴ோከ㒆ዟฟ㞼⏫㜿஭⏘ࡢຍᕤ◁࡛࠶ࡿ㸬ࡑࡢ≀⌮ⓗᛶ㉁ࢆ⾲1࡟㸪෗┿ࢆ෗┿1࡟♧ࡍ㸬ᐇ㦂࡛౑⏝ࡋࡓ➉ᮦᩱࡣ㸪⾲2࡟♧ࡍྜィ5✀㢮ࢆ⏝ពࡋ㸪ヨ㦂యࢆ〇సࡋࡓ㸬➉⧄⥔᮰ࡣ㸪➉ࢆ⧄⥔᪉ྥ࡟ゎࡋ࡚㛗ࡉࢆษࡾࡑࢁ࠼ࡓࡶࡢ࡛㸪᩿㠃ᙧ≧ࡣ୍ᐃ࡛ࡣ࡞
࠸㸦෗┿2㸧
㸬⾲2ࡢᑍἲ㸦0.7mm0.7mm㸧ࡣ㸪᩿㠃ࢆ▴ᙧ࡛⨨ࡁ᥮࠼ࡓ᫬ࡢᖹᆒ್࡛࠶ࡿ㸬－ 80 －

⾲ 1. 㦵ᮦࡢ≀⌮ⓗᛶ㉁✀ูẚ㔜㻟㻔㼓㻛㼏㼙 㻕⣽㦵ᮦ㻞㻚㻡㻞⢒㦵ᮦ㻞㻚㻣㻞྾Ỉ⋡ ᭱኱ᑍἲ㻔㼙㼙㻕㻔㻑㻕㻝㻚㻝㻡㻙㻜㻚㻡㻝㻡㻙㻝㻜㻜ྛ䜅䜛䛔䛻ṧ䜛㔜㔞ⓒศ⋡㻔㻑㻕㻡㻞㻚㻡㻝㻚㻞㻜㻚㻢㻜㻚㻟㻜㻡㻞㻥㻡㻣㻣㻣㻜㻠㻠㻡㻡㻝㻡㻝㻜㻜㻜㻜㻚㻝㻡 ཷ䛡─㻥㻟㻣㻜㻜⢒⢏⋡㻲㻹㻞㻚㻢㻝㻢㻚㻠㻟 ෗┿ 1. ᮏᐇ㦂࡛౑⏝ࡋࡓ㦵ᮦ
⾲ 2. ౑⏝ࡋࡓ➉⧄⥔ᮦᩱཌࡉᑍἲ PPᖜ㛗ࡉ࢔ࢫ࣌ࢡࢺẚ➉⧄⥔᮰㸺⧄⥔᮰㸼➉ࡦࡈ㸺➉Წ㸼ȭ㸦༙ศ࡟࢝ࢵࢺ㸧➉ࡦࡈ㸺➉Წ㸼ȭ➉ࡦࡈ㸺➉Წ/㸼ȭ㸦༙ศ࡟࢝ࢵࢺ㸧➉ࢳࢵࣉ㸺➉ࢳࢵࣉ㸼⧄⥔✀㢮㸨᩿㠃ᙧ≧෗┿㸨㸺࢝ࢵࢥ㸼ෆࡣࠊᮏㄽ୰࡛ࡢ⾲グ෗┿ 2. ᮏᐇ㦂࡛౑⏝ࡋࡓ➉⧄⥔
⾲ 3-1. ㄪྜ⾲(A,Bࢩ࣮ࣜࢬ)䝅䝸䞊䝈⧄⥔ΰධ㔞㻔㼢㼛㼘㻑㻕Ỉ䝉䝯䞁䝖ẚ㼃㻛㻯䠄䠂䠅⣽㦵ᮦ⋡㼟㻛㼍䠄䠂䠅㻜㻚㻜㻝㻚㻜㻭Ỉ㼃䝉䝯䞁䝖㻯㻢㻤㻚㻜㻜㻚㻜㻠㻜㻚㻜㻤㻜㻚㻜㻝㻜㻜㻚㻜㻠㻜㻚㻜㻤㻜㻚㻜㻝㻜㻜㻚㻜㻡㻜㻮㻝㻚㻜㻞㻠㻞㻠㻤㻠༢఩㔞㻔㼗㼓㻛㼙㻟㻕⣽㦵ᮦ ⢒㦵ᮦ㻿㻳㻥㻥㻥㻠㻥㻤㻥㻤㻞㻠㻤㻥㻡㻤㻤㻥㻟㻠㻝㻝㻣㻢㻟㻝㻝㻝㻠㻣㻜㻙㻡㻣㻤㻥㻝㻤㻝㻝㻡㻡㻟㻜㻢㻝㻠㻠㻠㻙⧄⥔㻮㻲㻜㻚㻜㻥㻚㻟㻜㻚㻜㻥㻚㻟ΰ࿴๣㻙㻙㻙㻙㻙㻙㻙㻙

⾲ 3-2. ㄪྜ⾲(Cࢩ࣮ࣜࢬ)Ỉ䝉䝯䞁䝖ẚ䝅䝸䞊䝈⧄⥔ΰධ㔞㻔㼛㻛㼢㼛㼘㻚㻕䠟㻙㼃㻛㻯䠄䠂䠅⣽㦵ᮦ⋡㻿㻛㼍䠄䠂䠅Ỉ㼃䝉䝯䞁䝖㻯⣽㦵ᮦ㻿㻡㻜㻢㻤㻚㻜㻞㻠㻞

㻠㻤㻠

㻥㻥㻥

 ➉⧄⥔⿵ᙉࢭ࣓ࣥࢺ」ྜᮦᩱࡢㄪྜタィ඲࡚ࡢㄪྜタィ࡟࠾࠸࡚㸪Ỉࢭ࣓ࣥࢺẚ50%࡛༢఩Ỉ㔞ࡣ242kg/m3㸪⣽㦵ᮦ⋡68%㸦Aࢩ࣮ࣜࢬ㸧㸪✵Ẽ㔞4%

༢఩㔞㻔㼗㼓㻛㼙 㻟㻕⢒㦵ᮦ⧄⥔㻳㻮㻲㻙㻙ΰ࿴๣䠉㻭㻱๣㻔䊠✀㻕㻭㻱ῶỈ๣㻌ᶆ‽ᙧ㻔䊠✀㻕㧗ᛶ⬟㻭㻱ῶỈ๣

࡛ඹ㏻࡜ࡋࡓ㸬⧄⥔ࢆΰධࡍࡿ࡜᪋ᕤᛶࡀపୗࡍࡿࡇ࡜
ࡀ⪃࠼ࡽࢀࡿࡀ㸪ΰ࿴๣ࡣ౑⏝ࡋ࡚࠸࡞࠸㸬ΰ࿴๣࡟ࡼࡿ➉⧄⥔࡬ࡢ໬Ꮫⓗస⏝ࡀᠱᛕࡉࢀ㸪ࡇࡢၥ㢟ࡣCࢩ࣮ࣜ

－ 81 －

ࢬ࡛ィ⏬ࡋ࡚࠸ࡿࡓࡵ㸪A,Bࢩ࣮ࣜࢬ࡛ᐇ㦂ࡍࡿࡍ࡭࡚ࡢ
ㄪྜ࡛ΰ࿴๣ࡣ౑⏝ࡋ࡞࠸ࡇ࡜࡟ࡋࡓ㸬➉⧄⥔ࡢㄪྜ㔞ࡣ㸪ᐜ✚ΰධ㔞ࢆ➉ࡢᐦᗘࢆ
1200kg/m3㸦ᐇ㦂࡛౑⏝ࡋࡓ㛗ࡉ30mmࡢ➉ࡦࡈ10ᮏ࠶ࡓࡾࡢᐜ✚࡜㔜ࡉࢆᐇ ࡋ࡚⟬ฟ㸧࡜ࡋ࡚㉁㔞࡟᥮⟬ࡋ࡚Ỵᐃࡋࡓ㸬඲ࢩ࣮ࣜࢬࡢ㓄ྜ⾲ࢆ⾲3࡟♧ࡍ㸬 ヨ㦂య〇సࢥࣥࢡ࣮ࣜࢺࡢ⦎ࡾΰࡐࡣ㸪ᙉไ᧠ᢾᆺࢥࣥࢡ࣮ࣜࢺ
࣑࢟ࢧࢆ⏝࠸࡚⾜ࡗࡓ㸬ጞࡵ࡟㸪◁࡜ࢭ࣓ࣥࢺ࠾ࡼࡧỈࢆᢞධࡋ 2 ศ㛫ΰࡐࡓᚋ㸪࣑࢟ࢧࢆṆࡵ㸪➉⧄⥔ࢆᡭ࡛࡯ࡄࡋ࡞ࡀࡽᢞධࡋࡓ㸬⧄⥔ᢞධ᏶஢ᚋ㸪1 ศ㛫⦎ࡾࡲࡐ㸪᭱ᚋ࡟⢒㦵ᮦࢆᢞධࡋ 3 ศ㛫⦎ࡾΰࡐࡓ㸬⦎ࡾΰࡐࡀ⤊ࢃࡗࡓࣇࣞࢵࢩࣗࢥࣥࢡ࣮ࣜࢺࡣ㸪࣑࢟ࢧ࠿ࡽ⦎ࡾᯈ࡟ྲྀࡾฟࡋ㸪ᡭ⦎ࡾ࡛෌ᗘ඲యࢆᨩᢾᚋ㸪ࢫࣛࣥࣉࡢ
ᐃࢆ⾜ࡗࡓ㸬ࢫࣛࣥࣉヨ㦂⤊஢ᚋ㸪ᙉᗘヨ㦂⏝ᆺᯟ࡟ᡴ㎸ࢇࡔᚋ㸪ࢸ࣮ࣈࣝࣂ࢖ࣈ࣮ࣞࢱ࣮ࡢୖ࡟㍕ࡏ࡚᣺ືࢆ୚࠼⥾ᅛࡵࢆ⾜ࡗࡓ㸬3.1 ࡛ᚋ㏙ࡍࡿࡼ࠺࡟㸪ணഛᐇ㦂࡟ࡼࡿ᳨ドࢆ㋃ࡲ࠼࡚㸪ᡴ㎸ࡳ᫬ࡢ᣺ື᫬㛫ࡣ 120 ⛊࡜ࡋࡓ㸬ᅽ⦰ヨ㦂࡜๭⿣ヨ㦂⏝ヨ㦂యࡣ㸪φ100×200mm ࡢ㍍㔞ᆺᯟ㸪᭤ࡆヨ㦂⏝ヨ㦂యࡣ㸪100×100×400mm ࡢ㗰〇ᆺᯟ࡛〇సࡋࡓ㸬෇ᰕ౪ヨయࡣ㸪ࡑࢀࡒࢀ 3 యࡎࡘస〇ࡋ㸪◳໬ࢥࣥࢡ࣮ࣜࢺࡢᙉᗘ್ࡣ 3 యࡢᖹᆒ್࡜ࡋ࡚⟬ฟࡋࡓ㸬ࡓࡔࡋ㸪᭤ࡆ౪ヨయࡣᆺᯟᩘࡢ㒔ྜ࡟ࡼࡾ 1 యࡎࡘస〇ࡋ࡚࠸ࡿ㸬ᙉᗘヨ㦂⏝ヨ㦂యࡣ㸪ᡴタᚋ 3 ᪥┠࡟⬺ᆺ㸪ヨ㦂ᮦ㱋ࡲ࡛Ỉ୰㣴⏕ࡋࡓ㸬ᮦ㱋 28 ᪥┠࡛඲࡚ࡢᙉ
ᗘヨ㦂ࡣ⾜ࡗࡓ㸬ᐇ㦂⤖ᯝ࠾ࡼࡧ⪃ᐹ ᣺ື᫬㛫࡜ᙉᗘࡢ㛵ಀ㸦ணഛᐇ㦂㸧ணഛᐇ㦂࡟ࡘ࠸࡚㸪ᆺᯟᡴ㎸ࡳ᫬ࡢ᣺ື᫬㛫࡜๭⿣ᙉᗘ࡜ࡢ㛵ಀࢆᅗ2࡟♧ࡍ㸬࡞࠾㸪ヨ㦂యA3㸪A4ࡣ0⛊࡜30⛊ࡢస〇ࡣ⾜ࡗ࡚࠸࡞࠸ࡢ࡛㸪60⛊࡜120⛊ࡢࢹ࣮ࢱࡢ
ࡳ♧ࡍ㸬ࡲࡓ㸪ᅗ୰ࡢ୍Ⅼ㙐⥺ࡣ⧄⥔ࢆධࢀ࡞࠸ࣉ࣮ࣞࣥࢥࣥࢡ࣮ࣜࢺ㸦A0㸧ࡢᙉᗘࢆ♧ࡋ࡚࠸ࡿ㸬
ᅗ2ࡼࡾ㸪⧄⥔ࢆධࢀࡓࡇ࡜࡟ࡼࡾ๭⿣ᙉᗘࡣୖ᪼ࡋ㸪ࡑࡢ๭ྜࡣ᣺ື᫬㛫ࢆ㛗ࡃࡍࡿ࡯࡝኱ࡁࡃ࡞ࡗ࡚࠸ࡿഴྥࡀぢࡽࢀࡿ㸬ࡇࢀࡣ㸪᣺ືࡍࡿࡇ࡜࡟ࡼࡾᚎࠎ࡟ෆ㒊ࡢ✵Ẽ㔞ࡀపୗࡋ㸪ᮦᩱࡀ⥾ᅛࡲࡗࡓࡓࡵ࡜⪃࠼ࡽࢀࡿ㸬ࡓࡔࡋ㸪A1㸦⧄⥔᮰㸧ࡢ120⛊᣺ືࡋࡓࡶࡢࡣపୗࡋ࡚
࠸ࡿ㸬ࡲࡓ㸪A2㸦➉ࢳࢵࣉ㸧ࡢ60⛊᣺ືࡋࡓࡶࡢࡣ⧄⥔ࢆධࢀ࡞࠸ࡶࡢࡼࡾᙉᗘࡀపୗࡋ࡚࠸ࡿ㸬ࡇࢀࡽࡢཎᅉࡣ㸪࠶࡜࡛⪃ᐹࡍࡿࡼ࠺࡟㸪A1࡜A2࡛౑⏝ࡋ࡚࠸ࡿ⧄⥔ࡢ᢬ᢠ࣓࢝ࢽࢬ࣒ࡀ௚࡜ࡣ␗࡞ࡿࡓࡵ࡜⪃࠼ࡽࢀࡿ㸬ࡼࡃ᣺ື⥾ᅛࡵࢆ⾜ࡗࡓࢥࣥࢡ࣮ࣜࢺࡣ㸪◳໬ࢥࣥࢡ࣮ࣜࢺࡢᙉᗘࡀ㧗࠸್ࢆ♧ࡍࡇ࡜ࡣ㸪᪤ ࡢ◊✲࡛ࡶ☜ㄆࡉࢀ࡚࠸ࡿ(7)㸬ᮏᐇ㦂࡟࠾࠸࡚ࡶ㸪➉⧄⥔ࡀ๭⿣ᙉᗘ࡟ᑐࡋ࡚᭷ຠ࡟స⏝ࡍࡿ࡜࡜ࡶ࡟㸪༑ศ࡞⥾ᅛࡵࢆ⾜࠺ࡇ࡜࡛ࡑࡢቑຍ๭ྜࡀ㧗ࡃ࡞ࡿഴྥࢆ♧ࡍࡇ࡜ࡀ☜ㄆ࡛ࡁࡓ㸬௨ୖࡢ⤖ᯝࡼࡾ㸪ᮏㄽ᳨࡛ウࡍࡿ౪ヨయࡣ㸪᣺ື᫬㛫120⛊࡛⥾ᅛࡵࢆ⾜࠺ࡇ࡜࡟ࡋࡓ㸬㻠㻚㻜㻞㻕㻟㻚㻤㼙㻟㻚㻢㼙㻛㼤㻔㻺㻟㻚㻠䞉䡩䞉 㻟㻚㻞䞉 㻟㻚㻜䞉㻞㻚㻤㻞㻚㻢㻜㻭㻝㻔⧄⥔᮰㻕㻟㻜㻢㻜㻥㻜᣺ື᫬㛫㻔⛊㻕㻭㻞㻔➉䝏䝑䝥㻕㻭㻟㻔➉Წ㻝㻛㻞㻕㻝㻞㻜㻭㻠㻔➉Წ㻕

ᅗ 2. ౪ヨయసᡂ᫬ࡢ᣺ື᫬㛫࡜๭⿣ᙉᗘࡢ㛵ಀ ➉⧄⥔ᙧ≧ࡢ㐪࠸࡟ࡼࡿᙳ㡪㸦$ࢩ࣮ࣜࢬ㸧➉ᮦᩱࡢᙧ≧ࢆኚ໬ࡉࡏࡓAࢩ࣮ࣜࢬࡢᐇ㦂࡟ࡘ࠸࡚㸪ᮦ㱋28᪥┠ࡢ◳໬ࢥࣥࢡ࣮ࣜࢺ࡟ࡼࡿྛ✀ᙉᗘ࠾ࡼࡧ༢఩ᐜ✚㉁㔞ࢆ⾲4࡟ࡲ࡜ࡵ࡚♧ࡍ㸬࡞࠾㸪⾲4࡟♧ࡍ್ࡣ㸪ྛᮦᩱࡢヨ㦂యࢆ3యࡎࡘ㸦᭤ࡆᙉᗘヨ㦂యࡣ1యࡎࡘ㸧సᡂࡋ㸪ᐇ㦂ࢆ⾜ࡗࡓᖹᆒ್࡛࠶ࡿ㸬ᅗ3࡟㸪⧄⥔ࡢ᩿㠃✚ࢆᶓ㍈࡟࡜ࡾ㸪ᅽ⦰㸪๭⿣㸪᭤ࡆᙉᗘࡢ㛵ಀࢆࡑࢀࡒࢀࣉࣟࢵࢺࡍࡿ㸬ᚋ࡛⪃ᐹࡍࡿࡼ࠺࡟㸪᩿㠃✚ࡀᑠࡉ࡞⧄⥔᮰㸦A1㸧࡜➉ࢳࢵࣉ㸦A2㸧ࡢヨ㦂యࡣ㸪ࡦࡧ๭ࢀࡢᙧᡂ࡜࡜ࡶ࡟⧄⥔ࡀ◚᩿ࡍࡿࡀ㸪➉ᲬࢆΰධࡋࡓA3㹼A5ヨ㦂య࡛ࡣ⧄⥔ࡀ◚᩿ࡍࡿࡇ࡜࡞ࡃ㸪ࢥࣥࢡ࣮ࣜࢺ࡜ࡢ௜╔㸪࠶ࡿ࠸ࡣᦶ᧿࡟ࡼࡾᢤࡅฟࡋ࡚ᙉᗘቑຍ࡟ࡘ࡞ࡀࡗࡓ࡜⪃࠼ࡽࢀࡿ㸬ࡇࡢࡼ࠺࡟㸪ᙉᗘࢆỴᐃࡍࡿ࣓࢝ࢽࢬ࣒ࡀ⧄⥔✀㢮࡟ࡼࡗ࡚␗࡞ࡿࡓࡵ㸪඲࡚ࡢᐇ㦂⤖ᯝࢆࡦ࡜ࡃࡃࡾ࡛ホ౯ࡣ࡛ࡁ࡞࠸ࡀ㸪࠾ࡼࡑ᩿㠃✚ࡀ኱ࡁ࠸᪉ࡀ㸪๭⿣ᙉᗘ࡜᭤ࡆᙉᗘࡣ኱ࡁࡃ࡞ࡗ࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡿ㸬
⾲ 4. ◳໬ࢥࣥࢡ࣮ࣜࢺヨ㦂⤖ᯝ㸦Aࢩ࣮ࣜࢬ㸧㻭䝅䝸䞊䝈⧄⥔ΰධ㔞㻔㼢㼛㼘㻑㻕㻭㻜㻜㻚㻜－ 82 －⧄⥔✀㢮ᅽ⦰ᙉᗘ㻔㻹㻼㼍㻕᭤䛢ᙉᗘ㻔㻹㻼㼍㻕๭⿣ᙉᗘ㻔㻹㻼㼍㻕༢఩ᐜ✚㉁㔞㻌䃠㻔㻖㻝㻜㻟㼗㼓㻛㼙㻟 㻕㻞㻚㻞㻥䛺䛧㻠㻣㻚㻝㻣㻠㻚㻟㻣㻞㻚㻤㻣㻭㻝⧄⥔᮰㻠㻡㻚㻢㻡㻠㻚㻢㻥㻞㻚㻥㻡㻞㻚㻞㻤㻭㻞䝏䝑䝥㻠㻞㻚㻢㻣㻠㻚㻣㻟㻞㻚㻥㻣㻞㻚㻞㻤㻞㻚㻞㻢㻭㻟➉Წ㻝㻛㻞㻠㻠㻚㻞㻢㻠㻚㻞㻜㻟㻚㻣㻜㻭㻠㻝㻚㻜➉Წ㻠㻞㻚㻠㻝㻠㻚㻥㻡㻟㻚㻣㻤㻞㻚㻟㻜㻭㻡➉Წ㻸㻞㻜㻟㻜㻚㻤㻠㻠㻚㻤㻢㻟㻚㻠㻡㻞㻚㻟㻜㻢㻚㻜㼙 㻡㻚㻡㼙㻛㼤㻔㻺 㻡㻚㻜䞉䡩䞉 㻠㻚㻡䡬䞉䢄䞉 㻠㻚㻜㻭㼤䞉䞉 㻟㻚㻡䡩䞉 㻟㻚㻜䞉䞉 㻞㻚㻡ࡿ㸬ࡦࡧࢃࢀⓎ⏕๓࡟㸪⧄⥔ࡀ࣐ࢺࣜࢵࢡࢫ࡜༑ศ࡟௜╔ࡋ࡚࠸ࡿ㸦⧄⥔࡜࣐ࢺࣜࢵࢡࢫࡢࡦࡎࡳࡣ➼ࡋ࠸㸧࡜௬ᐃࡍࡿ࡜㸪➉⧄⥔ࢭ࣓ࣥࢺ」ྜᮦᩱࡢᘬᙇᙉᗘ㸦ǔc㸧ࡣ୍⯡࡟ḟᘧࡀᡂ❧ࡍࡿ(8)㸬

㻡㻜㻞㻕㻠㻜

㻕㼙㼙㻛㼤㻔㻺䞉䡩㼗䞉䞉䡯䞉㻞㻟㻜㻞㻜㻝㻜㻞㻚㻜

Vc

ࡇࡇ࡟㸪 K 2 㸸⧄⥔ᙧ≧࡟ࡼࡿಀᩘ㸪 K 1 㸸⧄⥔㓄ྥຠ㻜㻜㻜㻚㻡㻝㻝㻚㻡㻞⧄⥔䛾᩿㠃✚㻔㼙㼙㻞㻕᭤䛢ᙉᗘ๭⿣ᙉᗘ㻞㻚㻡㻞㻤᪥ᙉᗘ

K1K 2V f V f  V m (1  V f )          (1)㻟ᅗ 3. ⧄⥔᩿㠃✚࡟ᑐࡍࡿᙉᗘ௨ୗ࡟Aࢩ࣮ࣜࢬࡢྛヨ㦂ࡢᴫせ࡜⪃ᐹࢆࡲ࡜ࡵࡿ㸬D ᅽ⦰ᙉᗘᅽ⦰ヨ㦂ࡣ㸪୓⬟ヨ㦂ᶵ࡟ࡼࡾ㍕Ⲵࡋࡓ㸬⧄⥔ΰධ㔞࡟࠿࠿ࢃࡽࡎ㸪ྠࡌࡼ࠺࡞◚ቯ≧ἣ࡛࠶ࡗࡓ㸬ᅽ⦰ᙉᗘࡣ42.4㹼44.5MPa࡜㸪ࣉ࣮ࣞࣥࢥࣥࢡ࣮ࣜࢺ㸦A0㸧ࡢ
47.2MPa࡟ẚ࡭࡚㸪᭱኱㸯๭⛬ᗘపୗࡋࡓ㸬࡞࠾㸪A5ࡣ
30.8MPa࡜௚࡟ẚ࡭࡚ᴟ➃࡟ప࠸ࡀ㸪ࡇࢀࡣ㣴⏕ᵴ࡟ࡣᜏ ⿦⨨ࡀ↓ࡃ㸪Ỉ ࡀ10Υ௨ୖప࠿ࡗࡓࡓࡵ࡜⪃࠼ࡽࢀࡿ㸬୍⯡࡟㸪⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺࡣ㸪⧄⥔㔞ࢆቑຍࡋ࡚ࡶᅽ⦰ᙉᗘࡢቑຍࡣࡈࡃࢃࡎ࠿࡛࠶ࡗ࡚㸪⧄⥔ࡢΰධ࡟ࡼࡾ⥾ᅛࡵࡀ༑ศ࡟⾜ࢃࢀ࡟ࡃࡃ㸪ᙉᗘࡀపୗࡍࡿࡇ࡜ࡶ࠶ࡿࡇ࡜ࡀ▱ࡽࢀ࡚࠸ࡿ㸬Aࢩ࣮ࣜࢬ࡛ࡣ㸪⢒㦵ᮦࡀධࡗ࡚࠸ࡿࡢ࡛⧄⥔ࡀධࡾ㎸ࡵࡿ✵㛫ࡀᑡ࡞ࡃ㸪ᆒ㉁࡟ศᩓࡋ࡞࠿ࡗࡓ࡜᥎ᐹࡉࢀࡿ㸬ࡲࡓ㸪ΰධ⧄⥔㔞ࡀᐜ✚ࡢ1%ࡔࡗࡓࡓࡵ㸪⧄⥔ࡀᅽ⦰ᙉᗘ࡟ᑐࡋ࡚༑ศ࡞⿵ᙉຠᯝࢆⓎ᥹ࡍࡿࡇ࡜ࡣ࡞ࡃ㸪ࡴࡋࢁࡦࡧࢃࢀࢆಁ㐍ࡍࡿ㑇≀ࡢࡼ࠺࡞ᙺ๭࡛ᅽ⦰ᙉᗘࡢపୗࡀ㉳ࡇࡗࡓ࡜⪃࠼ࡽࢀࡿ㸬E ᭤ࡆᙉᗘ᭤ࡆᙉᗘࡣ㸪୓⬟ヨ㦂ᶵ࡟ࡼࡾ㍕Ⲵ἞ලࢆ⏝࠸୕➼ศⅬ༢ㄪ᭤ࡆ㍕Ⲵࢆ⾜ࡗࡓ㸬୍⯡࡟㸪ࢥࣥࢡ࣮ࣜࢺࡢ᭤ࡆᙉᗘ࡜๭⿣ᙉᗘ࡟ࡣ┦㛵ᛶࡀ࠶ࡿࡀ㸪ᮏᐇ㦂࡛ࡣᙉ࠸┦㛵ᛶࡣぢࡽࢀ࡞࠿ࡗࡓ㸬᭤ ࡆ ᙉᗘ ࡣ㸪 ≉ ࡟ప ࠿ࡗ ࡓ A3 ࢆ 㝖ࡃ ࡜ 㸪 4.69 㹼4.95MPa࡜㸪ࣉ࣮ࣞࣥ㸦A0㸧ࡢ4.37MPa࡟ẚ࡭࡚1๭⛬ᗘ኱ࡁࡃ࡞ࡾ㸪➉ࢆ1%ΰධࡍࡿࡇ࡜࡟ࡼࡾ㸪᭤ࡆᙉᗘࡀ1๭⛬ᗘ኱ࡁࡃ࡞ࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡓ㸬F ๭⿣ᙉᗘ๭⿣ヨ㦂ࡣ㸪ᅽ⦰ヨ㦂࡜ྠࡌ୓⬟ヨ㦂ᶵ࡟ࡼࡾ㍕Ⲵࡋࡓ㸬2.95㹼3.78MPa࡜㸪ࣉ࣮ࣞࣥ㸦A0㸧ࡢ2.87MPa࡟ẚ࡭࡚㸪᭱኱3๭኱ࡁࡃ࡞ࡾ㸪1%⛬ᗘࡢ⧄⥔ΰධ࡛㧗࠸ᙉᗘቑຍࡀࡳࡽࢀࡓ㸬⧄⥔࡜ࣔࣝࢱ࣐ࣝࢺࣜࢵࢡࢫ࡟ࡼࡿ」ྜᮦᩱࡢᘬᙇ
㸦๭⿣㸧ᙉᗘࢆホ౯ࡍࡿ࡟ᑐࡋ࡚ΰྜ๎ࢆ㐺⏝ࡋ࡚⪃࠼ᯝಀᩘ㸪V f 㸪V m 㸸⧄⥔㸪࣐ࢺࣜࢵࢡࢫࡢᛂຊ㸪V f 㸸⧄⥔ࡢయ✚ࡇࡢΰྜ๎࡟ᇶ࡙࠸࡚㸪๭⿣ᙉᗘ࡟࠾࠸࡚➉⧄⥔ࡀ᢬ᢠ࡟ᐤ୚ࡍࡿ㈇ᢸᙉᗘࡢ๭ྜࢆィ⟬ࡋ࡚ࡳࡿ㸬ᐇ㦂ᚋࡢ๭⿣㠃ࢆぢࡿ࡜㸪᩿㠃✚ࡀᑠࡉ࡞⧄⥔᮰㸦A1㸧࡜➉ࢳࢵࣉ㸦A2㸧ࡢヨ㦂యࡣ㸪࡯࡜ࢇ࡝ࡍ࡭࡚ࡢ⧄⥔ࡀ◚᩿ࡋ࡚࠸ࡓ㸦ᅗ4ղࡢ≧ែ㸧㸬୍᪉㸪➉ᲬࢆΰධࡋࡓA3
㹼A5ヨ㦂య࡛ࡣ⧄⥔ࡀ◚᩿ࡍࡿࡇ࡜࡞ࡃ㸪ࢥࣥࢡ࣮ࣜࢺ࡜ࡢ௜╔㸪࠶ࡿ࠸ࡣᦶ᧿࡟ࡼࡾᢤࡅฟࡋ࡚ᙉᗘቑຍ࡟ࡘ࡞ࡀࡗࡓ࡜⪃࠼ࡽࢀࡿ㸦ᅗ4ճࡢ≧ែ㸧㸬ࡲࡓ㸪୍␒ኴ࠸➉Წ㸦A4㸧࡛ࡣ㸪⧄⥔ࡀࡃࡢᏐ࡟ᢡࢀ᭤ࡀࡾ㸪⦪᪉ྥ࡟⿣ࡅ࡚࠸ࡿࡶࡢࡀఱᮏࡶほᐹࡉࢀࡓ㸦෗┿3㸧㸬ᐇ㦂࡛ࡣ㸪⧄⥔✀㢮࡟㛵ಀ࡞ࡃ㸪⧄⥔ࢆධࢀࡓࡶࡢࡣ࠸ࡎࢀࡶධࢀ࡞࠸ࡶࡢ࡟ẚ࡭࡚๭⿣ᙉᗘࡀ㧗ࡃ࡞ࡗࡓࡀ㸪ᙉᗘቑศ࡟ᐤ୚ࡍࡿ⧄⥔ࡢ᢬ᢠᶵᵓࡣ⧄⥔ࡢኴࡉ࡟ࡼࡗ࡚␗࡞ࡗ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿ㸬⧄⥔ࡀ⣽࠸⧄⥔᮰㸦A1㸧࡜➉ࢳࢵࣉ㸦A2㸧࡛ࡣ㸪➉⧄⥔ࡢᘬᙇᙉᗘ࡟ࡼࡾᙉᗘቑศࡀ㉳ࡇࡗࡓ㸬ࡲࡓ㸪᩿㠃✚ࡀ኱ࡁ࡞➉Წ㸦A3㹼A5㸧࡛ࡣ㸪➉⧄⥔ࡣ◚᩿ࡏࡎ࡟㸪࣐ࢺࣜࢡࢫ࡜ࡢ௜╔ᢤࡅฟࡋ᢬ᢠࡀᙉᗘቑศ࡟ᐤ୚ࡋࡓ࡜⪃࠼ࡽࢀࡿ㸬≉࡟㸪᩿㠃✚ࡀ኱ࡁ࡞➉Წ㸦A4㸧࡛ࡣ㸪ࡦࡧࢃࢀࡀ㛤࠸ࡓᚋ࡟㸪➉⧄⥔ࡀ᭤ࡆ᢬ᢠࢆ♧ࡋ㸦ᅗ4մࡢ≧ែ㸧㸪ࡇࡢ᢬ᢠᛂຊ㸦ࢲ࣎᢬ᢠ㸧ࡀᙉᗘቑຍ࡟᭦࡟௜ຍࡉࢀࡓ࡜⪃࠼ࡽࢀࡿ㸬ࡦࡧ๭ࢀ㠃࿘㎶ࡢࣔࣝࢱࣝ࡟ࡼࡗ࡚ᣊ᮰ࡉࢀࡓᲬᮦࡢࢲ࣎
᢬ᢠ V d ࡣ㸪ᮏᐇ㦂ࡢࡼ࠺࡞ࣔࣝࢱࣝᙉᗘࡀపࡃ㸦20MPaᮍ‶㸧㸪⿵ᙉ➽ᙉᗘࡀప࠸㸦400MPaᮍ‶㸧ࡢሙྜ㸪ḟᘧ࡛⡆༢࡟ィ⟬ࡉࢀࡿ(9)㸬
V d = 0.25 d 2V f              (2)ࡇࡇ࡟㸪 d㸸⧄⥔ࡢ┤ᚄ㸪 V f 㸸⧄⥔ࡢᙉᗘ௨ୖ㸪ᮏᐇ㦂࡛ほᐹࡉࢀࡓ⌧㇟ࢆ㋃ࡲ࠼࡚㸪ྛヨ㦂య࡟࠾࠸࡚⧄⥔ࡀ㈇ᢸࡋ࡚࠸ࡿᙉᗘࡣ㸪ᘧ(1)ࢆࡶ࡜࡟௨ୗ
ࡢᘧ(3)࡛⾲ࡍࡇ࡜࡟ࡍࡿ㸬ᘧ(3)ࡢ➨୍㡯ࡣࢥࣥࢡ࣮ࣜࢺࡢࡦࡧࢃࢀᙉᗘ㸦ᅗ4ձࡢ≧ែ㸧㸪➨஧㡯ࡣ⧄⥔◚᩿ࡲࡓࡣ௜╔࡟ࡼࡿᙉᗘ㸦ᅗ4ղࡲࡓࡣճࡢ≧ែ㸧㸪ࡑࡋ࡚➨୕㡯ࡣ⧄⥔ࡢࢲ࣎᢬ᢠ㸦ᅗ4մࡢ≧ែ㸧࡟ࡼࡿᐤ୚ศ࡜ࡋ࡚

－ 83 －

 

ᅗ 4. ⧄⥔ΰධ㔞࡜༢఩ᐜ✚㉁㔞          ෗┿ 3. ◚᩿㠃࡟࠾ࡅࡿ➉ᲬࡢᵝᏊ
⾲ 5. ⧄⥔ࡢ᢬ᢠ࡟ᐤ୚ࡍࡿ㈇ᢸᙉᗘࡢィ⟬䝁䞁䜽䝸䞊䝖䃢㼙㼂㼙⧄⥔◚᩿䃢㼠㼂㼒⧄⥔௜╔䃣㼂㼒ィィィ⧄⥔䝎䝪䃢㼐䃒ィ๭⿣ᙉᗘ䠄㻯㼍㼘䠅㻱㼤㼜㻛㻯㼍㼘↓⿵ᙉ ⧄⥔᮰ ➉䝏䝑䝥 ➉Წ㻝㻛㻞 ➉Წ ➉Წ㻸㻞㻜㻙㻜㻚㻠㻥㻜㻚㻢㻤㻢㻝㻚㻞㻣㻞㻚㻡㻠㻝㻚㻞㻣㻙㻠㻞㻚㻤㻢㻝㻝㻝㻚㻝㻠㻢㻚㻤㻤 㻝㻢㻚㻢㻣 㻟㻝㻚㻞㻡㻞㻚㻤㻣㻞㻚㻥㻡㻞㻚㻥㻣㻟㻚㻣㻜㻟㻚㻣㻤㻟㻚㻠㻡㻞㻚㻤㻣㻞㻚㻤㻣㻞㻚㻤㻣㻞㻚㻤㻣㻞㻚㻤㻣㻞㻚㻤㻣㻝㻚㻜㻜㻜㻚㻥㻥㻜㻚㻥㻥㻜㻚㻥㻥㻜㻚㻥㻥㻜㻚㻥㻥㻞㻚㻤㻣㻞㻚㻤㻠㻞㻚㻤㻠㻞㻚㻤㻠㻞㻚㻤㻠㻞㻚㻤㻠㻝㻜㻚㻞㻡㻝㻜㻚㻞㻡㻜㻚㻜㻝㻜㻚㻜㻝㻜㻚㻝㻜㻜㻚㻝㻜㻤㻢㻚㻠㻤 㻟㻜㻚㻣㻡 㻡㻣㻚㻢㻢㻜㻚㻜㻝㻜㻚㻜㻝㻜㻚㻜㻝㻜㻚㻤㻢㻜㻚㻟㻝㻜㻚㻡㻤㻡㻚㻜㻢㻞㻜㻚㻞㻡㻡㻚㻜㻢㻜㻚㻜㻟㻜㻚㻜㻟㻜㻚㻜㻟㻜㻚㻝㻡㻜㻚㻢㻝㻜㻚㻝㻡㻞㻚㻤㻣㻞㻚㻥㻠㻞㻚㻥㻠㻟㻚㻤㻢㻟㻚㻣㻢㻟㻚㻡㻣㻝㻚㻜㻜㻝㻚㻜㻜㻝㻚㻜㻝㻜㻚㻥㻢㻝㻚㻜㻜㻜㻚㻥㻣ࡑࢀࡒࢀࡢ⣼ຍ࡛ィ⟬ࡍࡿ㸬Vc

V m V m  E (V torW )V f  JV d       (3)ࡇࡇ࡟㸪 Vm 㸸࣐ࢺࣜࢵࢡࢫࡢయ✚㸪 E㸸⧄⥔ࡢ୙㐃⥆㸪ᛶ㸪ࣛࣥࢲ࣒ᛶ࡞㓄⨨࡟ࡼࡿಀᩘ㸦᪤ ࡢ◊✲(9)ࡼࡾ0.41㸧
㸪W 㸸V t 㸸⧄⥔ࡢ◚᩿ᙉᗘ㸦᪤ ࡢ◊✲(10)ࡼࡾ25MPa㸧⧄⥔ࡢ௜╔ᙉᗘ㸦➉Წ࡜ࢥࣥࢡ࣮ࣜࢺࡢ௜╔ຊ࡜ࡋ࡚᪤ ࡢ◊✲(3)ࡼࡾ0.35MPa㸧㸪 J 㸸⧄⥔ࢲ࣎ࡢ㈇ᢸ๭ྜ㸦ᐇ㦂್ࢆࡶ࡜࡟0.03࡜ࡋࡓ㸧㸪 V d 㸸ࢲ࣎᢬ᢠ㸦ᘧ(2)㸧
ࡇࡢᘧ(3)ࢆ⏝࠸࡚㸪๭⿣ᙉᗘࢆィ⟬ࡋࡓࡶࡢࢆ⾲5࡟㸪ࡲࡓィ⟬್࡟࠾ࡅࡿᙉᗘ㈇ᢸࡀศ࠿ࡿࡼ࠺࡟ࢢࣛࣇ࡟ࡋ
ࡓࡶࡢࢆᅗ5࡟♧ࡍ㸬ࢥࣥࢡ࣮ࣜࢺ࡜⧄⥔ࡢ㈇ᢸ๭ྜࡀᐃ㔞ⓗ࡟ィ⟬ࡍࡿࡇ࡜ࡀ࡛ࡁ㸪ᐇ㦂⤖ᯝ࡜ࡶࡼ࠸ᑐᛂࢆ♧ࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿ㸬 ⣽㦵ᮦ⋡࡜ᙉᗘࡢ㛵ಀ㸦%ࢩ࣮ࣜࢬ㸧㻠㻚㻝㻜䝁䞁䜽䝸䞊䝖 ⧄⥔◚᩿ ⧄⥔௜╔ ⧄⥔䝎䝪㻟㻚㻥㻜๭⿣ᙉᗘ㻔㻺㻛㼙㼙㻞㻕᩿㠃✚⧄⥔䛾⣽㛗ẚ㻔䉭㻛㼐㻕๭⿣ᙉᗘ䠄㻱㼤㼜䠅㻟㻚㻣㻜㻟㻚㻡㻜㻟㻚㻟㻜㻟㻚㻝㻜㻞㻚㻥㻜㻞㻚㻣㻜㻞㻚㻡㻜ᅗ 5. ๭⿣ᙉᗘࡢ㈇ᢸ㸦ᘧ(3)࡟ࡼࡿ㸧⣽㦵ᮦ⋡ࢆኚ໬ࡉࡏࡓ B ࢩ࣮ࣜࢬࡢᐇ㦂࡟ࡘ࠸࡚㸪ᮦ
㱋 28 ᪥┠ࡢ◳໬ࢥࣥࢡ࣮ࣜࢺ࡟ࡼࡿྛ✀ᙉᗘ࠾ࡼࡧ༢఩ᐜ✚㉁㔞ࢆ⾲ 6 ࡟ࡲ࡜ࡵ࡚♧ࡍ㸬࡞࠾㸪⾲ 6 ࡟♧ࡍ್ࡣ㸪ྛᮦᩱࡢヨ㦂యࢆ 3 యࡎࡘ㸦᭤ࡆᙉᗘヨ㦂యࡣ 1 యࡎࡘ㸧సᡂࡋᐇ㦂ࢆ⾜ࡗࡓᖹᆒ್࡛࠶ࡿ㸬ヨ㦂᪉ἲࡣ㸪A
ࢩ࣮ࣜࢬ࡜ྠࡌ࡞ࡢ࡛ヲ⣽ࡣ┬␎ࡍࡿ㸬ᅗ 6㹼9 ࡟ࡣ㸪B ࢩ࣮ࣜࢬࡢኚືᅉᏊ࡛࠶ࡿ⣽㦵ᮦ⋡ࢆᶓ㍈࡟࡜ࡾ㸪༢఩ᐜ✚㉁㔞㸪ᅽ⦰ᙉᗘ㸪๭⿣ᙉᗘ㸪ࡑࡋ࡚᭤ࡆᙉᗘࢆࡑࢀࡒࢀࣉࣟࢵࢺࡋࡓࡶࡢࢆ♧ࡋ࡚࠸ࡿ㸬ʊࡣ↓⿵ᙉ㸦B0㸧
㸪ŏࡣ⿵ᙉ㸦B1㸧ヨ㦂య࡛࠶ࡿ㸬ᅗ 6 ࠿ࡽ㸪⧄⥔ࢆ 1%ΰධࡍࡿ࡜ᐦᗘࡀᑠࡉࡃ࡞ࡾ㸪⢒㦵ᮦࡢ๭ྜࡀῶࡿ࡜㸪㍍ࡃ࡞ࡗ࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡿ㸬ᅗ 7 ࡣᅽ⦰ᙉᗘࡢ㛵ಀ࡛࠶ࡿࡀ㸪⣽㦵ᮦ⋡ࡀప࠸࡜⧄⥔ࢆΰධࡍࡿࡇ࡜࡛ᙉᗘࡀపୗࡍࡿࡀ㸪80%࠶ࡿ࠸ࡣ 100%࡜⢒㦵ᮦࡢ㔞ࡀῶࡾ㸪ࣔࣝࢱࣝ࡟㏆ࡃ࡞ࡿ࡜⧄⥔࡟ࡼࡿ⿵ᙉຠᯝࡀ⾲ࢀ㸪⧄⥔ࢆධࢀࡿ࡯࠺ࡀᙉᗘࡣ㧗ࡃ࡞ࡗ࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡿ㸬ᅗ 8 ࡢ๭⿣ᙉᗘࡶᅽ⦰ᙉᗘ࡜ྠࡌഴྥࡀぢ࠼ࡿࡀ㸪ᙉᗘࡢቑຍࡣࢃࡎ࠿࡛࠶ࡿ㸬ᅗ 9 ࡣ᭤ࡆᙉᗘ࡛࠶ࡿ

－ 84 －⾲ 6. ◳໬ࢥࣥࢡ࣮ࣜࢺヨ㦂⤖ᯝ㸦B ࢩ࣮ࣜࢬ㸧㻮䝅䝸䞊䝈⧄⥔ΰධ㔞㻔㼢㼛㼘㻑㻕㻮㻜㻙㻠㻜㻮㻜㻙㻢㻤㻔㻭㻜㻕㻜㻚㻜㻮㻜㻙㻤㻜㻮㻜㻙㻝㻜㻜㻮䠍㻙㻠㻜㻝㻚㻜㻮䠍㻙㻢㻤㻔㻭㻞㻕䠄➉䝏䝑䝥䠅㻮䠍㻙㻤㻜㻮䠍㻙㻝㻜㻜⣽㦵ᮦ⋡㻔㻑㻕㻠㻜㻚㻜㻢㻤㻚㻜㻤㻜㻚㻜㻝㻜㻜㻚㻜㻠㻜㻚㻜㻢㻤㻚㻜㻤㻜㻚㻜㻝㻜㻜㻚㻜ᅽ⦰ᙉᗘ㻔㻹㻼㼍㻕㻠㻟㻚㻢㻥㻠㻣㻚㻝㻣㻟㻡㻚㻝㻣㻟㻞㻚㻢㻢㻟㻡㻚㻠㻞㻠㻞㻚㻢㻣㻠㻜㻚㻟㻤㻟㻢㻚㻠㻝᭤䛢ᙉᗘ㻔㻹㻼㼍㻕㻠㻚㻟㻥㻠㻚㻟㻣㻠㻚㻡㻜㻠㻚㻞㻡㻟㻚㻤㻜㻠㻚㻣㻟
㻠㻚㻢㻝
㻠㻚㻝㻞

๭⿣
ᙉᗘ㻔㻹㻼㼍㻕㻟㻚㻝㻝㻞㻚㻤㻣㻟㻚㻟㻡㻟㻚㻝㻤㻞㻚㻢㻥㻞㻚㻥㻣㻟㻚㻣㻡㻟㻚㻟㻟

༢఩ᐜ✚
㉁㔞㻌䃠
㻔㻖㻝㻜㻟㼗㼓㻛㼙㻟 㻕㻞㻚㻟㻢㻞㻚㻞㻥㻞㻚㻞㻤㻞㻚㻞㻟㻞㻚㻟㻟㻞㻚㻞㻤㻞㻚㻞㻣㻞㻚㻞㻞ʊ↓⿵ᙉヨ㦂య(B0)㸪ŏ➉ࢳࢵࣉ 1%⿵ᙉヨ㦂య(B1)㻕㼙 㻞㻚㻠㻜㻛㼓㼗㻟 㻞㻚㻟㻢㻜㼪㻝䞉䢆㻔 㻞㻚㻟㻞䞉䡻䞉 㻞㻚㻞㻤䢋㼑䞉䞉 㻞㻚㻞㻠䢆䞉㻼䞉 㻞㻚㻞㻜㻡㻜㻟㻞㻕㼙㻠㻡㼙㻛㻺㼤㻔䞉㻠㻜䡩㼗䞉䞉㻟㻡䡯䞉㻟㻜㻠㻜㻢㻜㻤㻜⣽㦵ᮦ⋡㻔㻑㻕㻠㻜㻝㻜㻜㻢㻜㻤㻜⣽㦵ᮦ⋡㻔㻑㻕㻝㻜㻜ᅗ 6. ⣽㦵ᮦ⋡࡟ᑐࡍࡿ༢఩ᐜ✚㉁㔞ࡢኚ໬   ᅗ 7. ⣽㦵ᮦ⋡࡟ᑐࡍࡿᅽ⦰ᙉᗘࡢኚ໬㻠㻚㻜㻠㻚㻤㻞㻕㼙㻟㻚㻢㼙㻛㼤㻔㻺䞉㻟㻚㻞䡩䞉䞉㻞㻚㻤䞉㻕㻞 㻠㻚㻢㼙㼙㻠㻚㻠㻛㼤㻔㻺䞉㻠㻚㻞䡩䞉㻠㻚㻜䡬䞉䢄䞉㻟㻚㻤㻞㻚㻠㻟㻚㻢㻠㻜㻢㻜㻤㻜⣽㦵ᮦ⋡㻔㻑㻕㻝㻜㻜㻠㻜㻢㻜㻤㻜⣽㦵ᮦ⋡㻔㻑㻕㻝㻜㻜ᅗ 8. ⣽㦵ᮦ⋡࡟ᑐࡍࡿ๭⿣ᙉᗘࡢኚ໬    ᅗ 9. ⣽㦵ᮦ⋡࡟ᑐࡍࡿ᭤ࡆᙉᗘࡢኚ໬ࡀ㸪๭⿣ᙉᗘ࡜ྠࡌࡃ㸪࡯࡜ࢇ࡝⧄⥔ΰධࡢᙳ㡪ࡣ࡞࠸㸬᪤ ࡢ◊✲(8)࡟ࡼࡿ࡜㸪⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺࡣ㸪༢఩Ỉ㔞㸪༢఩ࢭ࣓ࣥࢺ㔞࠾ࡼࡧ⧄⥔ΰධ⋡ࡸ⧄⥔ᙧ≧࡟ᛂࡌ࡚㸪ࢥࣥࢩࢫࢸࣥࢩ࣮࡟౫Ꮡࡋࡓ᭱㐺⣽㦵ᮦ⋡ࡀᏑᅾࡍࡿ㸬⣽㦵ᮦ⋡࡜ᙉᗘ࡜ࡢ㛵ಀࡣ᫂☜࡛ࡣ࡞ࡃ㸪ᮏᐇ㦂⤖ᯝ࠿ࡽࡶ㸪ඛ࡟᳨ウࡋࡓ A ࢩ࣮ࣜࢬ࡜␗࡞ࡾ㸪⣽㦵ᮦ⋡ࡀᙉᗘ࡟ཬࡰࡍᐃ㔞ⓗ࡞ᙳ㡪ࡣ☜ㄆ࡛ࡁ࡞࠿ࡗࡓ㸬 ໬Ꮫΰ࿴๣ࡀ➉࡟ཬࡰࡍᙳ㡪㸦&ࢩ࣮ࣜࢬ㸧࢔ࣝ࢝ࣜ୰࡟࠾࠸࡚㸪⾲㠃࡟ఱࡶฎ⌮ࡋ࡚࠸࡞࠸➉ᮦࡣ㸪࢔ࣝ࢝ࣜᡂศ࡟ࡼࡗ࡚➉ࡢ⣽⬊ࡀ౵ࡉࢀ㸪ḟ➨࡟ᘬᙇᙉᗘࡀపୗࡋ࡚࠸ࡃࡇ࡜ࡀ᪤ ࡢ◊✲⪅࡟ࡼࡾ☜ㄆࡉࢀ࡚࠸ࡿ㸬ࡋ࠿ࡋ㸪ྂ࠸ᐇ㦂࡞ࡢ࡛ヲ⣽ࡀ୙࡛᫂࠶ࡾ㸪ࡇࡢࡇ࡜࡟ࡘ࠸࡚ࡣࡑࡢᚋ◊✲ࡉࢀࡓ஦౛ࡀ࡞࠸㸬C ࢩ࣮ࣜࢬ࡛ࡣ㸪ࡇࡢࡇ࡜࡟ࡘ࠸᳨࡚ドࡍࡿࡓࡵ㸪⡆༢࡞ヨ㦂యࢆ〇సࡋ࡚㸪ᐇ㦂ࡍࡿࡇ࡜࡟ࡍࡿ㸬C ࢩ࣮ࣜࢬࡣ㸪ඛࡢᐇ㦂࡜ࡣヨ㦂య〇స᪉ἲࡀ␗࡞ࡿࡢ࡛㸪ࡣࡌࡵ࡟◊✲ィ⏬࡜ヨ㦂య〇స㸪ᐇ㦂ᴫせࢆㄝ᫂ࡍࡿ㸬D ◊✲ィ⏬ᐇ㦂ࡢ᪉ἲࡣ㸪┤ᚄ 160mm ⛬ᗘ㸪⫗ཌ 15mm ࡢ 3 ᖺ┠ࡢᏗ᐀➉࠿ࡽ㸪ᅗ 10 ࡟♧ࡍᑍἲ࡛ヨ㦂∦ࢆ๐ࡾฟࡋ㸪ヨ㦂༊㛫ࡢ 60mm 㒊ศࢆ෗┿ 4 ࡟♧ࡍࡼ࠺࡞ᆺᯟ࡛㸪ࣔࣝࢱ࡛ࣝ‶ࡓࡋ࡚◳໬ࡉࡏࡓ㸬1㸪6㸪12 ࠿᭶┠࡟㸪◳໬ࡋࡓࣔࣝࢱࣝ࠿ࡽヨ㦂∦ࢆ 3 ᮏࡎࡘྲྀࡾฟࡋ㸪ヨ㦂∦ࡢ᩿㠃ᑍἲࢆ ᐃࡋᘬᙇヨ㦂ࢆᐇ᪋ࡍࡿ㸬－ 85 －

PPPP࠙༢఩PPࠚᅗ 10. ᘬᙇヨ㦂∦F ౪ヨయ〇సᙉไᨩᢾᆺ࣑࢟ࢧ࡟ᮦᩱࢆᢞධࡋ㸪ࢭ࣓ࣥࢺ」ྜᮦᩱ
ࢆ⦎ࡿ㸬ᘬᙇヨ㦂యࡢヨ㦂㒊ศࡀ㸪ࢭ࣓ࣥࢺ࡟᥋ゐࡋ◳໬ࡍࡿࡼ࠺࡟ᆺᯟࢆ〇సࡋ㸪ࡇࡢᆺᯟෆ࡟⦎ࡾୖࡀࡗࡓ
ᮦᩱࢆᡴ㎸ࡴ㸬ᡴࡕ㎸ࡳ᏶஢ 2 ᪥ᚋ࡟⬺ᆺࡋ㸪20Υࡢᜏᐊ࡛㣴⏕ࡍࡿ㸦෗┿ 6㸧㸬࡞࠾㸪‵ᗘࡣㄪᩚࡋ࡚࠸࡞࠸
ࡢ࡛㸪30%⛬ᗘࡢ஝⇱ࡋࡓ≧ែ࡛㣴⏕ࡋ࡚࠸ࡿ㸬෗┿ 4. ᘬᙇヨ㦂యᆺᯟ෗┿ 6. ᜏ ᐊෆࡢᵝᏊ෗┿ 5. ᐇ㦂࡛౑⏝ࡋࡓ໬Ꮫΰ࿴๣
⾲ 7. ໬Ꮫΰ࿴๣ᡂศ⾲㻌୺ᡂศ㻌ᐦᗘ
䠄㼓㻛㼏㼙㻘㻞㻜䉝㻕㻌඲䜰䝹䜹䝸㔞䠄䠂䠅㻌ሷ໬≀䜲䜸䞁㔞㻭㻱 ๣㻌㻭㻱 ῶỈ๣㻌㧗ᛶ⬟ 㻭㻱 ῶỈ๣㻌䜰䝹䜻䝹䜶䞊䝔䝹⣔㝜䜲䜸䞁 ኚᛶ䝸䜾䝙䞁䝇䝹䝩䞁㓟໬ྜ 䝫䝸䜹䝹䝪䞁㓟䜶䞊䝔䝹⣔⏺㠃άᛶ๣㻌≀㻌໬ྜ≀㻌㻝㻚㻜㻞䡚㻝㻚㻜㻢㻌㻝㻚㻜㻢䡚㻝㻚㻝㻜㻌㻝㻚㻜㻠䡚㻝㻚㻝㻝㻌㻝㻚㻝㻌

㻝㻚㻝㻌

㻝㻚㻠㻌

㻜㻚㻜㻝㻌

㻜㻚㻜㻟㻌㻜㻚㻜㻝㻌እほ㻌ῐ㯤Ⰽᾮయ㻌ᬯ〓Ⰽᾮయ㻌

㉥〓Ⰽᾮ≧㻌౑⏝㔞㻌㻯㽢㻜㻚㻜㻜㻢䠂㻌㻯㽢㻝䠂㻌㻯㽢㻜㻚㻥䠂㻌䠄䠂䠅㻌(a) C0(b) C1－ 86 －(c) C2(d) C3
෗┿ 7. ᘬᙇヨ㦂∦ࡢ◚᩿≧ἣ‥••․‛․‧•ࣖщࡇ‚⁀‡ᆺᯟ࡟ὶࡋ㎸ࢇࡔࣔࣝࢱࣝ࡟ࡣ㸪໬Ꮫΰ࿴๣ࢆῧຍࡋ㸪ΰ࿴๣ࡢ୺ᡂศࡀ➉ࡢ⣽⬊࡟ཬࡰࡍ໬Ꮫⓗస⏝ࢆ᳨ドࡍࡿ㸬ΰ࿴๣ࡢ୰࡛ࡶᘓタ⌧ሙ࡛ẚ㍑ⓗ฼⏝ᗘࡀ㧗࠸ AE๣㸪AE ῶỈ๣㸪㧗ᛶ⬟ AE ῶỈ๣ࡢ 3 ✀㢮ࢆ⏝࠸ࡿ㸦෗
┿ 5㸧㸬ΰ࿴๣ࡢ୺ᡂศࢆ⾲ 7 ࡟♧ࡍ㸬ᐇ㦂࡛ࡣ㸪ΰ࿴๣ࢆྵࡲ࡞࠸ࡶࡢ࡜㸪3 ✀㢮ࡢΰ࿴๣ࢆῧຍࡋࡓ㓄ྜ࡜ࡋࡓࡶࡢ㸪4 ✀㢮ࢆసᡂࡍࡿ㸬E 㓄ྜタィ㓄ྜタィ࡛ࡣ㸪໬Ꮫΰ࿴๣௨እࡢ᮲௳ࡣࡍ࡭࡚ྠࡌ࡜
ࡋࡓ㸬ᮏ᮶㸪໬Ꮫΰ࿴๣࡟ࡣῶỈຠᯝࡀ࠶ࡿࡢ࡛㸪౑⏝ࡍࡿΰ࿴ᮦࡢᛶ⬟࡟ᛂࡌ࡚༢఩Ỉ㔞ࢆኚ࠼ࡿ࡭ࡁ࡛࠶ࡿࡀ㸪௒ᅇࡢᐇ㦂ࡢ┠ⓗ࠿ࡽ㸪᪋ᕤᛶࡸ⪏ஂᛶࡣ㛵ಀ࡞࠸ࡢ࡛㸪ΰ࿴๣ࡢῧຍࡀ࠶ࡿ࣭࡞ࡋ௨እࡣ㓄ྜࢆኚ࠼࡚࠸
࡞࠸㸦⾲ 3-2㸧㸬໬Ꮫΰ࿴๣ࡢ౑⏝㔞ࡣ㸪⾲ 7 ࡟♧ࡍ࡜࠾ࡾ࡛࠶ࡿࡀ㸪ᮏᐇ㦂࡛ࡣᶆ‽㔞ࡢ 1.5 ಸࢆῧຍࡋ࡚࠸ࡿ㸬ΰ࿴๣࡟ࡼ
ࡿᙳ㡪ࢆ┤᥋ぢࡓ࠸ࡓࡵᑡࡋከࡵ࡟ῧຍࡋࡓ㸬ࡇࢀ࡟ࡼࡗ࡚㸪✵Ẽࡢศᩓຠᯝࡀ኱ࡁࡃ㸪ࢫࣛࣥࣉ್ࡸࣇ್࣮ࣟࡀィ ࡛ࡁ࡞࠸⛬ࡸࢃࡽ࠿࠸ࢥࣥࢡ࣮ࣜࢺࡀฟ᮶ࡓࡀ㸪ୖグࡢ㏻ࡾ᪋ᕤᛶ࡟ࡘ࠸࡚ࡣゐࢀ࡞࠸ࡢ࡛㸪ࡇࡢࡲࡲ㓄ྜࢆኚ࠼ࡎ࡟ᆺᯟ࡟ᡴࡕ㎸ࢇࡔ㸬․••‣‧•‣••‵•‵․‧•‵‣‵‥↡↉↮≋ȣ≌••‧•••‣••••‣‧•••

ᅗ 11. ᘬᙇᛂຊ-ࡦࡎࡳ㛵ಀ․••••G ➉ᮦࡢᘬᙇヨ㦂ᮦ㱋 28 ᪥┠࡟ᘬᙇヨ㦂ࢆࡋࡓヨ㦂∦ࡢヨ㦂㒊ศࢆ෗┿ 7 ࡟♧ࡍ㸬ヨ㦂∦ࡈ࡜࡟኱ࡁ࡞㐪࠸ࡣ࡞ࡃ㸪᩿㠃ࢆ㍯ษࡾ࡟ࡍࡿࡼ࠺࡟◚᩿ࡋࡓࡶࡢ࡜㸪⦪᪉ྥ࡟㛗ࡃ⿣ࡅࡿࡼ࠺࡟◚᩿ࡋࡓࡶࡢࡀࡑࢀࡒࢀ࡛࠶ࡗࡓ㸬ྠࡌࢩ࣮ࣜࢬࡣ㸪3 ᮏࡎࡘヨ㦂ࡋࡓࡀ㸪ࡑࡢ࠺ࡕ 1 ᮏ࡟ࡣࡦࡎࡳࢤ࣮ࢪࢆ 2 ᯛ㈞௜ࡋ࡚㸪ࡦࡎࡳࢆィ ࡋࡓ㸬ᅗ 11 ࡟㸪ヨ㦂∦ 4 ᮏࡢᘬᙇᛂຊ-ࡦࡎࡳ㛵ಀࢆ♧ࡍ㸬ᮦ
㱋28 ᪥࡛ࡣ4 ᮏ࡜ࡶ๛ᛶࡣ࡯࡜ࢇ࡝ኚࢃࡗ࡚࠸࡞࠸ࡇ࡜
ࡀศ࠿ࡿ㸬ྛࢩ࣮ࣜࢬ 3 ᮏࡢᘬᙇᙉᗘࢆᖹᆒࡋࡓࡶࡢࢆ㸪ᅗ 12࡟♧ࡍ㸬ᘬᙇᙉᗘ࡟ࡘ࠸࡚ࡣ㸪᫂ࡽ࠿࡟໬Ꮫΰ࿴๣ࢆῧ
ຍࡋࡓࡶࡢ㸦C1㹼C3㸧ࡀపୗࡋ࡚࠸ࡿࡇ࡜ࡀศ࠿ࡿ㸬ࡓࡔࡋ㸪ࡇࡢཎᅉࡀΰ࿴๣ࡢ⭉㣗ࡢᙳ㡪࠿࡝࠺࠿࡟ࡘ࠸࡚
ࡣ㸪⌧᫬Ⅼࡢࢹ࣮ࢱࡔࡅ࡛ࡣุู୙⬟࡛࠶ࡿ㸬ᅗ 13 ࡟㸪༢఩ᐜ✚㔜㔞ࢆẚ㍑ࡋࡓࡶࡢࢆ♧ࡍࡀ㸪ඛ࡟㏙࡭ࡓࡼ࠺࡟㸪㓄ྜ᪉ἲ㸪ΰ࿴๣ࡢῧຍ㔞㸪㣴⏕᪉ἲ࡞࡝ࡢᙳ㡪࠿ࡽ㸪ΰ࿴๣ࢆῧຍࡋࡓヨ㦂యࡣ㍍ࡃ࡞ࡗ࡚࠸ࡿ㸬ࡇࢀࡣ✵Ẽࡀࣔࣝࢱࣝෆ㒊࡟ศᩓࡋ࡚㸪✵Ẽ㔞ࡀቑ࠼࡚࠸ࡿࡓ
ࡵ࡜⪃࠼ࡽࢀࡿ㸬ࡋࡓࡀࡗ࡚㸪C1㹼C3 ࡢ➉∦ࡣ✵Ẽ࡟ᗈࡃゐࢀ࡚࠸ࡿࡢ࡛㸪஝⇱ࡋࡸࡍࡃ࡞ࡗ࡚࠸ࡿ࡜ࡶ⪃࠼ࡽࢀ㸪ΰ࿴๣࡟ࡼࡿ໬Ꮫⓗ࡞స⏝ࡀ࠶ࡿ࠿࡝࠺࠿㸪ࡇࢀ࠿ࡽᐇ᪋ࡍࡿ 6 ࠿᭶┠㸪12 ࠿᭶┠ࡢᐇ㦂⤖ᯝࡶ㋃ࡲ࠼㸪᳨ウࡋ࡚࠸ࡁࡓ࠸㸬ࡽࢌࣖщࡇ(N/mm2)

240230220210200190180‵•‵‣‵․‵‥

ᅗ 12. ᘬᙇᙉᗘࡢẚ㍑

ҥˮ˳ᆢ᣻᣽‚⁙‡⁕‥‛․†․‧․†․•․†‣‧․†‣•․†•‧․†••‣†‫‧‫‬‣†‫•‫‬‵•‵‣‵․

ᅗ 13. ༢఩య✚㔜㔞ࡢẚ㍑
‵‥ࡲ࡜ࡵ⮬↛⣲ᮦ࡛࠶ࡿ➉ࢆά⏝ࡍࡿࡇ࡜ࢆ᳨ウࡋ㸪➉➽⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺࡢ㛤Ⓨࢆ⾜࠺ࡇ࡜ࢆ┠ⓗ࡟㸪ᇶ♏ⓗ࡞ᐇ㦂ࢹ࣮ࢱࢆᐇ ࡋࡓ㸬ᐇ㦂ࣃ࣓࣮ࣛࢱ࡜ࡋ࡚㸪➉ࡢᙧ≧㸦᩿㠃✚࡜㛗ࡉ㸧㸪⣽㦵ᮦ⋡࡞࡝4ࡘࡢࢩ࣮ࣜࢬ࡛ヨ㦂యࢆ〇సࡋ㸪ᇶᮏⓗ࡞≀ᛶ࡜ࡋ࡚㸪◳໬ࢥࣥࢡ࣮ࣜࢺࡢᙉᗘ≉ᛶ㸦ᅽ⦰㸪๭⿣㸪᭤ࡆ㸧㸪༢఩ᐜ✚㉁㔞࡞࡝᳨ウࡋࡓ⤖ᯝ㸪ḟࡢࡇ࡜ࡀ᫂ࡽ࠿࡟࡞ࡗࡓ㸬1) ᪋ᕤᛶ࡟㛵ࡍࡿ᳨ウ⧄⥔ࢆධࢀࡿࡇ࡜࡟ࡼࡾ㸪๭⿣ᙉᗘࡣୖ᪼ࡋ㸪ࡑࡢ๭ྜࡣ᣺ື᫬㛫ࢆ㛗ࡃࡍࡿ࡯࡝኱ࡁࡃ࡞ࡗࡓ㸬ࡇࢀࡣ㸪᣺ືࡍࡿࡇ࡜࡟ࡼࡾෆ㒊ࡢ✵Ẽࡀᢤࡅ࡚ᮦᩱࡀ⥾ᅛࡲࡗࡓࡓࡵ࡜⪃࠼ࡽࢀࡿ㸬2) ➉⧄⥔ᙧ≧ࡢ㐪࠸࡟ࡼࡿᙳ㡪㸦Aࢩ࣮ࣜࢬ㸧ࡦࡧࢃࢀ࡟┤᥋ⓗ࡟㛵ಀ࠶ࡿ๭⿣ᙉᗘࡣ㸪2.95㹼
3.78MPa࡜㸪ࣉ࣮ࣞࣥࢥࣥࢡ࣮ࣜࢺࡢ2.87MPa࡟ẚ࡭࡚㸪᭱኱3๭኱ࡁࡃ࡞ࡾ㸪1%⛬ᗘࡢ⧄⥔ΰධ࡛㧗࠸ᙉᗘቑຍࡀࡳࡽࢀࡓ㸬౪ヨయ◚ቯ㠃ࡢ⧄⥔ࡢ≧ែ࠿ࡽ㸪➉Წࢆΰධࡋࡓヨ㦂య࡛ࡣ⧄⥔ࡀ◚᩿ࡍࡿࡇ࡜࡞ࡃ㸪ࢥࣥࢡ࣮ࣜࢺ࡜ࡢ௜╔㸪࠶ࡿ࠸ࡣᦶ᧿࡟ࡼࡾᢤࡅฟࡋ࡚ᙉᗘቑຍ࡟ࡘ࡞ࡀࡗࡓ࡜⪃࠼ࡽࢀࡿ㸬3) ⣽㦵ᮦ⋡࡜ᙉᗘࡢ㛵ಀ㸦Bࢩ࣮ࣜࢬ㸧⣽㦵ᮦ⋡ࡀ኱ࡁ࠸᪉ࡀ⧄⥔ࡣ᭷ຠ࡟స⏝ࡍࡿࡇ࡜ࡣ☜ㄆ࡛ࡁࡓ㸬4) ໬Ꮫΰ࿴๣ࡀ➉࡟ཬࡰࡍᙳ㡪㸦Cࢩ࣮ࣜࢬ㸧໬Ꮫΰ࿴๣ࢆῧຍࡋࡓࢥࣥࢡ࣮ࣜࢺ࡟ᾐࡋࡓ➉ᮦࡢᘬᙇᙉᗘࡣ㸪᫂ࡽ࠿࡟໬Ꮫΰ࿴๣↓ῧຍ࡟ᑐࡋ࡚పୗࡋࡓ㸬ࡓࡔࡋ㸪ࡇࡢཎᅉࡀΰ࿴๣ࡢ⭉㣗ࡢᙳ㡪࠿࡝࠺࠿࡟ࡘ࠸࡚ࡣ㸪⌧᫬Ⅼࡢࢹ࣮ࢱࡔࡅ࡛ࡣุู୙⬟࡛࠶ࡿ㸬ㅰ㎡
ヨ㦂యࡢ〇స࡟࠶ࡓࡾ㸪୰ᅜ࢔ࢧࣀࢸࢡࣀࢫᰴᘧ఍♫ࡼࡾ㸪➉ᮦᩱ࡜㦵ᮦࡢ୍㒊ࢆᥦ౪ࡋ࡚࠸ࡓࡔࡁࡲࡋࡓ㸬ࡲࡓ㸪ヨ㦂య〇స࠾ࡼࡧᐇ㦂ᐇ᪋࡟㝿ࡋ㸪㏆␥኱ᏛᕤᏛ㒊ᘓ⠏⏕⏘◊✲ᐊࡢH25ᖺᗘ༞ᴗ⏕࡟༠ຊ࠸ࡓࡔࡁࡲࡋࡓ㸬ࡇࡇ࡟グࡋ࡚῝⏒ࡢㅰព⾲ࡋࡲࡍ㸬ཧ⪃ᩥ⊩(1) Masakazu TERAI,Koichi MINAMI, ͆ Fracture
Behavior and Mechanical Properties of Bamboo
Reinforced Concrete Members”,11th International
conference on the mechanical behavior of materials(ICM2011) 㸪 Proceedings Vol.10, (2011-6)
pp.2976-2981(2) Masakazu TERAI and Koichi MINAMI,͆ Basic－ 87 －Study on Mechanical Properties of Bamboo
ReinforcedConcrete”,
IABSE-IASS2011
Symposium㸪 Proceedings DVD, (2011-9)(3) ᑎ஭㞞࿴㸪༡ ᏹ୍,͆➉➽ࢥࣥࢡ࣮ࣜࢺࡢ௜╔ᛶ≧࠾ࡼࡧ᭤ࡆᛶ≧࡟㛵ࡍࡿᇶ♏ⓗ◊✲͇㸪ࢥࣥࢡ࣮ࣜࢺᕤᏛᖺḟㄽᩥ㞟㸪Vol.33(DVD)㸪(2011-7)(4) ⣽⏣㈏୍㸪͆➉➽ࢥࣥࢡ࣮ࣜࢺᕤ͇㸪ಟᩍ♫᭩㝔㸪
(1942-2)(5) Masakazu TERAI and Koichi MINAMI,͆Fracture
Behavior and Mechanical Properties of Bamboo
Fiber Reinforced Concrete”, Key Engineering
Materials㸪Vols.488-489, Trans Tech Publications,
Switzerland, (2011-9), pp.214-217(6) ᑎ஭㞞࿴㸪༡ ᏹ୍,͆➉⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺࡢຊᏛ≉ᛶ࡟㛵ࡍࡿᐇ㦂ⓗ◊✲͇㸪ࢥࣥࢡ࣮ࣜࢺᕤᏛᖺḟㄽᩥ㞟㸪Vol.34(DVD)㸪(2012-7)(7) ᚨ㔜ⱥಙ㸪ᕝୖ Ὥ㸪࿴⏣୍ᮁ㸪͆ࡶࡳẆ⅊ΰ࿴ࣔࣝࢱࣝࡢ᣺ື⥾ᅛࡵຠᯝ࡟㛵ࡍࡿ◊✲͇㸪ࢥࣥࢡ࣮ࣜࢺᕤᏛᖺḟㄽᩥ㞟㸪➨24ᕳNo.1㸪(2002-7)㸪
pp.537-542(8) ᑠᯘ୍㍜㸪͆⧄⥔⿵ᙉࢥࣥࢡ࣮ࣜࢺ㸫≉ᛶ࡜ᛂ⏝㸫͇㸪࣮࣒࢜♫㸪(1981)(9) Miha Tomazevic,“Earthquake-Resistant Designof Masonry Buildings Series on Innovation inStructures and Construction”, Vol.1, Imperial
College Press, (1999)(10) Fergyanto E. GUNAWAN, et al., “Mechani cal
Properties of Oil Palm Empty Fruit Bunch Fiber”,
Journal of Solid Mechanics and Materials
Engineering, Vol.3, No.7, (2009-3), pp.943-951－ 88 －