JP2012097449A - Pc鋼材 - Google Patents
Pc鋼材 Download PDFInfo
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- JP2012097449A JP2012097449A JP2010245412A JP2010245412A JP2012097449A JP 2012097449 A JP2012097449 A JP 2012097449A JP 2010245412 A JP2010245412 A JP 2010245412A JP 2010245412 A JP2010245412 A JP 2010245412A JP 2012097449 A JP2012097449 A JP 2012097449A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 239000004519 grease Substances 0.000 claims abstract description 13
- -1 polyethylene Polymers 0.000 claims abstract description 8
- 229920000573 polyethylene Polymers 0.000 claims abstract description 7
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract 2
- 239000011513 prestressed concrete Substances 0.000 description 29
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000004567 concrete Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 2
- 229920003355 Novatec® Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- RLAWWYSOJDYHDC-BZSNNMDCSA-N lisinopril Chemical compound C([C@H](N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(O)=O)C(O)=O)CC1=CC=CC=C1 RLAWWYSOJDYHDC-BZSNNMDCSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
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Abstract
【解決手段】PC鋼線1と、そのPC鋼線1の周りにグリース3を介在して被せたポリエチレン製シース2とから成るアンボンドPC鋼材である。シース2は、引張強さ:29MPa以上の高強度のものとする。この高弾性のシース2であると、曲げて施工されても破れることがない。このため、グリース3の漏洩もない。
【選択図】図1
Description
このアンボンド工法は、小梁がない大床構造にも使用が可能のため、LPG等の液化ガスの貯蔵タンクの屋根スラブや原子炉における蒸気発生器の屋根スラブ等の構築に採用されている(特許文献1図7 特許文献2図1)。
このとき、その圧接によって、シース2が破れると、グリース3が漏れ出てPC鋼線1が錆易くなり、その錆によってPC鋼線1の強度が低下して、スラブコンクリートに対する引張力が低下する恐れがある。
具体的な構成としては、PC鋼線と、そのPC鋼線の周りにグリースを介在して被せた樹脂シースとから成るアンボンドPC鋼材であって、曲げられて使用され、その曲げによって樹脂シースに圧縮力が作用した場合、その圧縮力ではその樹脂シースは破断されない高強度を有する構成を採用したものである。
このPC鋼材10は、ドーム状スラブにおいては、円弧状に曲げて施工される。このため、上述のように、そのPC鋼材10の軸線方向に沿ってガイドを設けることとなり、図2に示すように、ガイドをなす治具12によってその態様を模型化し、その治具12の案内面の半径:R、緊張荷重:N(kN)、曲げ治具12頂点G付近のシース2に加わる荷重:A(kN/mm)とすると、次式の近似式が成立する。
N=2×2R×π/4×∫A(cos2θ)dθ θ:0→π/2・・(1)
ここで、R=700mm、N=210kNとすると、
上記式(1)は、210=2×2×700×π/4×∫A(cos2θ)dθとなり、
θ:0→π/2から、A=0.12kN/mmとなる。
また、この試験例1〜9の樹脂で図1のPC鋼材10のシース2を形成し、その各試料を図2に示す試験を行い、その結果を表1に示す。その図2の試験において、R:700mm、N:210kNで、1分、引張荷重Nを負荷した。表中、「×」はグリース3が漏れ出た場合、「○」はグリ−スが漏れ出なかった場合を示す。
1a 鋼線
2 シース
3 グリース
10 PC鋼材
Claims (2)
- PC鋼線(1)と、そのPC鋼線(1)の周りにグリース(3)を介在して被せた樹脂シース(2)とから成るアンボンドPC鋼材(10)であって、曲げられて使用され、その曲げによって前記樹脂シース(2)に圧縮力が作用した場合、その圧縮力ではその樹脂シース(2)は破断されない高強度を有するものであることを特徴とするPC鋼材。
- 上記樹脂シース(2)を引張強さ:29MPa以上のポリエチレンとしたことを特徴とする請求項1に記載のPC鋼材。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010245412A JP5676212B2 (ja) | 2010-11-01 | 2010-11-01 | Pc鋼材 |
Applications Claiming Priority (1)
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JP2010245412A JP5676212B2 (ja) | 2010-11-01 | 2010-11-01 | Pc鋼材 |
Publications (2)
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JP2012097449A true JP2012097449A (ja) | 2012-05-24 |
JP5676212B2 JP5676212B2 (ja) | 2015-02-25 |
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JP2010245412A Active JP5676212B2 (ja) | 2010-11-01 | 2010-11-01 | Pc鋼材 |
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JP (1) | JP5676212B2 (ja) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016520459A (ja) * | 2013-06-05 | 2016-07-14 | マークフォージド,インコーポレーテッド | 繊維強化付加製造方法 |
US10076876B2 (en) | 2013-03-22 | 2018-09-18 | Markforged, Inc. | Three dimensional printing |
US10076875B2 (en) | 2013-03-22 | 2018-09-18 | Markforged, Inc. | Methods for composite filament fabrication in three dimensional printing |
US10099427B2 (en) | 2013-03-22 | 2018-10-16 | Markforged, Inc. | Three dimensional printer with composite filament fabrication |
US10259160B2 (en) | 2013-03-22 | 2019-04-16 | Markforged, Inc. | Wear resistance in 3D printing of composites |
US10434702B2 (en) | 2013-03-22 | 2019-10-08 | Markforged, Inc. | Additively manufactured part including a compacted fiber reinforced composite filament |
US10603841B2 (en) | 2013-03-22 | 2020-03-31 | Markforged, Inc. | Multilayer fiber reinforcement design for 3D printing |
US10611082B2 (en) | 2013-03-22 | 2020-04-07 | Markforged, Inc. | Apparatus for fiber reinforced additive manufacturing |
US10682844B2 (en) | 2013-03-22 | 2020-06-16 | Markforged, Inc. | Embedding 3D printed fiber reinforcement in molded articles |
US10696039B2 (en) | 2013-03-22 | 2020-06-30 | Markforged, Inc. | Multilayer fiber reinforcement design for 3D printing |
US10717228B2 (en) | 2013-03-22 | 2020-07-21 | Markforged, Inc. | Three dimensional printing |
US10953609B1 (en) | 2013-03-22 | 2021-03-23 | Markforged, Inc. | Scanning print bed and part height in 3D printing |
US11065861B2 (en) | 2013-03-22 | 2021-07-20 | Markforged, Inc. | Methods for composite filament threading in three dimensional printing |
US11148409B2 (en) | 2013-03-22 | 2021-10-19 | Markforged, Inc. | Three dimensional printing of composite reinforced structures |
US11237542B2 (en) | 2013-03-22 | 2022-02-01 | Markforged, Inc. | Composite filament 3D printing using complementary reinforcement formations |
US11787104B2 (en) | 2013-03-22 | 2023-10-17 | Markforged, Inc. | Methods for fiber reinforced additive manufacturing |
US11981069B2 (en) | 2013-03-22 | 2024-05-14 | Markforged, Inc. | Three dimensional printing of composite reinforced structures |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003039522A (ja) * | 2001-07-30 | 2003-02-13 | Sumitomo Electric Ind Ltd | アンボンドpc鋼より線の製造方法 |
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- 2010-11-01 JP JP2010245412A patent/JP5676212B2/ja active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003039522A (ja) * | 2001-07-30 | 2003-02-13 | Sumitomo Electric Ind Ltd | アンボンドpc鋼より線の製造方法 |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10821662B2 (en) | 2013-03-22 | 2020-11-03 | Markforged, Inc. | Methods for fiber reinforced additive manufacturing |
US11759990B2 (en) | 2013-03-22 | 2023-09-19 | Markforged, Inc. | Three dimensional printing |
US10076876B2 (en) | 2013-03-22 | 2018-09-18 | Markforged, Inc. | Three dimensional printing |
US10076875B2 (en) | 2013-03-22 | 2018-09-18 | Markforged, Inc. | Methods for composite filament fabrication in three dimensional printing |
US10099427B2 (en) | 2013-03-22 | 2018-10-16 | Markforged, Inc. | Three dimensional printer with composite filament fabrication |
US10259160B2 (en) | 2013-03-22 | 2019-04-16 | Markforged, Inc. | Wear resistance in 3D printing of composites |
US10434702B2 (en) | 2013-03-22 | 2019-10-08 | Markforged, Inc. | Additively manufactured part including a compacted fiber reinforced composite filament |
US10603841B2 (en) | 2013-03-22 | 2020-03-31 | Markforged, Inc. | Multilayer fiber reinforcement design for 3D printing |
US10611082B2 (en) | 2013-03-22 | 2020-04-07 | Markforged, Inc. | Apparatus for fiber reinforced additive manufacturing |
US10682844B2 (en) | 2013-03-22 | 2020-06-16 | Markforged, Inc. | Embedding 3D printed fiber reinforcement in molded articles |
US11981069B2 (en) | 2013-03-22 | 2024-05-14 | Markforged, Inc. | Three dimensional printing of composite reinforced structures |
US10040252B2 (en) | 2013-03-22 | 2018-08-07 | Markforged, Inc. | Methods for fiber reinforced additive manufacturing |
US10953609B1 (en) | 2013-03-22 | 2021-03-23 | Markforged, Inc. | Scanning print bed and part height in 3D printing |
US10953610B2 (en) | 2013-03-22 | 2021-03-23 | Markforged, Inc. | Three dimensional printer with composite filament fabrication |
US10696039B2 (en) | 2013-03-22 | 2020-06-30 | Markforged, Inc. | Multilayer fiber reinforcement design for 3D printing |
US11014305B2 (en) | 2013-03-22 | 2021-05-25 | Markforged, Inc. | Mid-part in-process inspection for 3D printing |
US11065861B2 (en) | 2013-03-22 | 2021-07-20 | Markforged, Inc. | Methods for composite filament threading in three dimensional printing |
US11148409B2 (en) | 2013-03-22 | 2021-10-19 | Markforged, Inc. | Three dimensional printing of composite reinforced structures |
US11237542B2 (en) | 2013-03-22 | 2022-02-01 | Markforged, Inc. | Composite filament 3D printing using complementary reinforcement formations |
US11420382B2 (en) | 2013-03-22 | 2022-08-23 | Markforged, Inc. | Apparatus for fiber reinforced additive manufacturing |
US11577462B2 (en) | 2013-03-22 | 2023-02-14 | Markforged, Inc. | Scanning print bed and part height in 3D printing |
US10717228B2 (en) | 2013-03-22 | 2020-07-21 | Markforged, Inc. | Three dimensional printing |
US11787104B2 (en) | 2013-03-22 | 2023-10-17 | Markforged, Inc. | Methods for fiber reinforced additive manufacturing |
JP2016520459A (ja) * | 2013-06-05 | 2016-07-14 | マークフォージド,インコーポレーテッド | 繊維強化付加製造方法 |
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