JP4010524B2 - Bearing plate with conical surface - Google Patents
Bearing plate with conical surface Download PDFInfo
- Publication number
- JP4010524B2 JP4010524B2 JP15430299A JP15430299A JP4010524B2 JP 4010524 B2 JP4010524 B2 JP 4010524B2 JP 15430299 A JP15430299 A JP 15430299A JP 15430299 A JP15430299 A JP 15430299A JP 4010524 B2 JP4010524 B2 JP 4010524B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- bearing plate
- pressure receiving
- receiving surface
- conical surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 16
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 description 10
- 230000037431 insertion Effects 0.000 description 10
- 210000002435 tendon Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000012012 Paullinia yoco Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Reinforcement Elements For Buildings (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は円錐面を有する支圧板に係り、橋梁用床版に比べて肉厚の薄い、あるいは遙かに小さい面積のコンクリート製品、例えば鉄道レール支持用コンクリート製品にポストテンションを導入する際、緊張材を締着するために供されるものである。
【０００２】
【従来の技術】
四角錐状に形成したアンカープレートは、実公平５−１８４１６号公報に見られるように、本件出願人の内の一人が既に提案済みである。
このアンカープレートは、コンクリート製橋梁用床版のように大型の製品向けとなっており、シースと緊張材を一体化するための充填材を注入するための注入孔が外部の斜面から軸孔に向けて穿たれている。
また、緊張材の挿通孔は、圧力伝達面側でシースを嵌合するために円錐状に拡径している。
【０００３】
【発明が解決しようとする課題】
アンボンド工法によりコンクリート製品にポストテンションを導入する場合、支圧板にグラウト注入孔やシース管取付部の加工は必要としない。
従来の支圧板は緊張材に緊張力が加わった場合、挿通孔の圧力伝達面側の孔縁内部に発生するトルクにより、支圧板の外周部分がコンクリート製品から浮き上がることがある。この場合、大きな緊張力が圧力伝達面の限られた面から製品に伝達されるので、プレストレスの効果を十分に発揮できない場合がある。
本発明は鉄道レール支持用コンクリート製品等に緊張力を導入する際、緊張材を締着して応力の均等配分ができ、プレストレスの効果を十分に発揮できる円錐面を有する支圧板を提供することを目的とする。
【０００４】
【課題を解決するための手段】
本発明に係る円錐面を有する支圧板は一面に複数の単位受圧面の集成面である受圧面を備え、他面が該単位受圧面に対応する複数の単位圧力伝達面の集成面である円形状部のある圧力伝達面となっている。該受圧面と直交する複数の直線上に緊張材の挿通孔が各別に穿たれる。そして、該受圧面の周縁部が該圧力伝達面側と円錐面を介して続いている。
この支圧板の場合、受圧面は複数の単位受圧面の集成面なので、緊張材に加わる緊張力を各単位受圧面で受けて緊張力の分散がはかれ、緊張材の挿通孔が複数となるので、板厚が大きくて緊張材を並行して挿通する必要のある床版等の場合に適用できる。
【０００５】
該単位圧力伝達面相互の境界線の延長上に応力分散部が形成されていてもよい。
この場合、応力が境界線上に集中するのを応力分散部に分散でき、支圧板の変形や破損を防げる。
【０００６】
【発明実施の形態】
以下の説明で、同一符号は同一又は相応部分を示す。
図１は従来の支圧板の１例を示してある。支圧板は板状で、一面が受圧面１で、他面が円形の圧力伝達面２となり、受圧面１と直交する直線Ｌ上に緊張材３の挿通孔４が穿たれている。そして、この受圧面１の周縁が圧力伝達面２側と円錐面５を介して続いている。
【０００７】
緊張材３を通すための挿通孔４の孔径は大きくない。緊張材３の緊張力を定着材６から受圧面１に受ければ、圧力伝達面２から均等にコンクリート製品７に伝達する。これにより、製品を損傷する恐れもなく、プレストレスの効果を高めることができる。
【０００８】
図３及び図４は本発明にかかる支圧板の具体例を示してあり、図５と図６はこの支圧板の各別の変形例である。
【０００９】
この支圧板は板状で、一面に受圧面１を備え、他面が円形状部のある圧力伝達面２となっている。この受圧面１と直交する複数の直線Ｌ上に緊張材３の挿通孔４が各別に穿たれる。そして、受圧面１の周縁部が圧力伝達面２側と円錐面５を介して続いている。
緊張材３の挿通孔４が複数個用意されるので、板厚が大きくて緊張材３を並行して挿通する必要のある床版等のコンクリート製品７の場合に好適となる。
【００１０】
この支圧板の場合、受圧面１は複数の単位受圧面２１の集成面である。
そのため、緊張材３に加わる緊張力を各単位受圧面２１で受けるので、緊張力の分散がはかれる。従って、支圧板の変形や損傷を防げる。
【００１１】
同様に、圧力伝達面２は複数の単位圧力伝達面２２の集成面である。
そのため、緊張材３に加わる緊張力を各単位圧力伝達面２２からコンクリート製品７に伝達するので、緊張力を分散して製品７に伝達できる。従って、支圧板の変形や損傷を防げる。
【００１２】
この支圧板の場合、単位圧力伝達面２２相互の境界線Ｂの延長上に応力分散部２３が形成されている。
こうすると、応力が境界線Ｂ上に集中するのを応力分散部２３に分散でき、支圧板の変形や破損を防げる。
【００１３】
［実験例］
Φ１３ｍｍの緊張材用の従来型と本発明型の類型である単一型の支圧板の面圧性能比較試験を行った。従来型は縦９０ｍｍ×横９０ｍｍ×厚さ１６ｍｍの正方形板、類型がΦ９０ｍｍ×厚さ１６ｍｍの円錐台形である。面圧スキャナーによる支圧板における面圧の分布解析結果は従来型が図７と図８、本発明型が図９と図１０に示す通りである。
図７と９は荷重１０tonfの場合、図８と１０は荷重２０tonfの場合である。
これらの図面で分かる通り、従来型の場合、面圧は外側で概略円周上に分布しており、その外側はほとんど面圧が発生していない。即ち正方形板の四隅部分は荷重負担にほとんど寄与していないことが分かる。そのため、これらの隅角部分を切除しても支圧板の機能は損なわれず、本発明のように円錐台形状とすることにより材料の節約が可能となった。
以上の結果ら判断して、複数の単位受圧面の集成面である受圧面を備えた支圧板についても、同様の作用効果を奏するであろうことは容易に推察されるところである。
【００１４】
【発明の効果】
本発明に係る支圧板によれば、緊張材の挿通孔が複数個用意されるので、板厚が大きくて緊張材を並行して挿通する必要のあるコンクリート製品の場合に好適となり、支圧板の構造は極めて簡単となり、緊張材に加わる緊張力を各単位受圧面で受けてコンクリート製 品に伝達でき、緊張力が分散して製品に伝達されるので、支圧板の変形や損傷を防げる。
【００１５】
請求項２によれば、応力が境界線上に集中するのを応力分散部に分散でき、支圧板の変形や破損を防げる。
【図面の簡単な説明】
【図１】 従来型の円錐面を有する支圧板の１例を示す正面図である。
【図２】 縦断面図である。
【図３】 本発明に係る円錐面を有する支圧板の具体例を示す背面図である。
【図４】 一部切断側面図である。
【図５】 支圧板の更に別の例を示す背面図である。
【図６】 支圧板の更に別の例を示す背面図である。
【図７】 従来型正方形支圧板の荷重１０tonfの場合の面圧分布解析図である。
【図８】 従来型正方形支圧板の荷重２０tonfの場合の面圧分布解析図である。
【図９】 従来型円錐形状支圧板の荷重１０tonfの場合の面圧分布解析図である。
【図１０】 従来型円錐形状支圧板の荷重２０tonfの場合の面圧分布解析図である。
【符号の説明】
１ 受圧面
２ 圧力伝達面
３ 緊張材
４ 挿通孔
５ 円錐面
６ 定着材
７ コンクリート製品
２１ 単位受圧面
２２ 単位圧力伝達面
２３ 応力分散部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bearing plate having a conical surface, and when a post tension is introduced into a concrete product having a thinner wall or a much smaller area than a bridge slab, such as a concrete product for supporting railroad rails, It is provided to fasten the material.
[0002]
[Prior art]
As shown in Japanese Utility Model Publication No. 5-18416, one of the applicants has already proposed an anchor plate formed in a quadrangular pyramid shape.
This anchor plate is intended for large products such as concrete bridge slabs, and the injection hole for injecting the filler to integrate the sheath and tension material into the shaft hole from the external slope. It is worn toward.
Further, the tendon insertion hole is expanded in a conical shape so as to fit the sheath on the pressure transmission surface side.
[0003]
[Problems to be solved by the invention]
When post-tension is introduced into a concrete product by the unbonding method, it is not necessary to process the grout injection hole or the sheath tube attachment portion on the bearing plate.
When a tension force is applied to the tension member in the conventional bearing plate, the outer peripheral portion of the bearing plate may be lifted from the concrete product due to the torque generated inside the hole edge on the pressure transmission surface side of the insertion hole. In this case, since a large tension force is transmitted to the product from a limited surface of the pressure transmission surface, the effect of prestress may not be sufficiently exhibited.
The present invention provides a bearing plate having a conical surface capable of exerting a pre-stress effect sufficiently by tightening a tension material and distributing stress uniformly when introducing tension force to a concrete product for railroad rail support. For the purpose.
[0004]
[Means for Solving the Problems]
Bearing plate having engagement Ru circular conical surfaces in the present invention includes a pressure receiving surface which is assembled surfaces of the plurality of unit pressure receiving surface on one side, in assembly surfaces of the plurality of unit pressure transmitting surfaces other surface corresponding to the unit receiving surface It is a pressure transmission surface with a certain circular portion. Tensile material insertion holes are individually formed on a plurality of straight lines orthogonal to the pressure receiving surface. The peripheral portion of the pressure receiving surface continues through the pressure transmission surface side and the conical surface.
For supporting the pressure plate of this, since the pressure receiving surface is a assembly surfaces of the plurality of unit pressure receiving surface, it receives the tension applied to the tension member in the unit pressure receiving surface distribution of tensioning force Hakare, insertion hole of the tensions material more since the, Ru can be applied to the case of the slab such that need to be inserted in parallel tendon large plate thickness.
[0005]
A stress dispersion portion may be formed on the extension of the boundary line between the unit pressure transmission surfaces.
In this case, the concentration of stress on the boundary line can be dispersed in the stress dispersion portion, and deformation and breakage of the bearing plate can be prevented.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the following description, the same reference numerals indicate the same or corresponding parts.
1 is shown an example of a conventional Bearing plate. The pressure bearing plate is plate-shaped, one surface is a
[0007]
The diameter of the
[0008]
3 and 4 is shown an example of Bearing plate according to the present invention, which is the another modification of the supporting plate of FIG. 5 and FIG. 6 Yoko.
[0009]
This pressure bearing plate is plate-shaped and includes a
Since a plurality of
[0010]
In the case of this pressure bearing plate, the
Therefore, since the tension force applied to the tension material 3 is received by each unit pressure receiving surface 21, the tension force is dispersed. Therefore, deformation and damage of the bearing plate can be prevented.
[0011]
Similarly, the
Therefore, since the tension force applied to the tension material 3 is transmitted from each unit
[0012]
In the case of this bearing plate , a
If it carries out like this, it can disperse | distribute to the stress dispersion |
[0013]
[Experimental example]
A surface pressure performance comparison test was performed on a conventional bearing plate for a tension material having a diameter of 13 mm and a single type bearing plate of the present invention . Conventional square plate vertical 90 mm × horizontal 90 mm × thickness 16 mm, is class type is frustoconical 90 mm × thickness 16 mm. The results of surface pressure distribution analysis on the bearing plate by the surface pressure scanner are as shown in FIGS. 7 and 8 for the conventional type and FIGS. 9 and 10 for the present invention type.
7 and 9 are for a load of 10 tons, and FIGS. 8 and 10 are for a load of 20 tons.
As can be seen from these drawings, in the case of the conventional type, the surface pressure is distributed substantially on the outer circumference and almost no surface pressure is generated on the outer side. That is, it can be seen that the four corners of the square plate hardly contribute to the load. Therefore, even if these corner portions are cut off, the function of the pressure bearing plate is not impaired, and the material can be saved by using the truncated cone shape as in the present invention.
Judging from the above results, it is easily guessed that the same function and effect will also be achieved for a pressure bearing plate having a pressure receiving surface that is an assembly surface of a plurality of unit pressure receiving surfaces.
[0014]
【The invention's effect】
According to engagement Ru supported plate of the present invention, since the insertion hole of the tension member is a plurality prepared, be suitable in the case of concrete products that need to be inserted in parallel tendon large plate thickness, Bearing plate structures Ri Do very simple, the tension applied to the tendon is received by the unit pressure receiving surface can be transmitted to the concrete product, since tension force is transmitted to the product by dispersing, deformation and damage of Bearing plates I can prevent it.
[0015]
According to the second aspect , the concentration of stress on the boundary line can be dispersed in the stress dispersion portion, and deformation and breakage of the bearing plate can be prevented.
[Brief description of the drawings]
1 is a front view showing an example of a conventional Bearing plate having a conical surface.
FIG. 2 is a longitudinal sectional view.
3 is a rear view showing a specific example of Bearing plate having engagement Ru circular conical surface to the present invention.
4 is a part sectional side view.
5 is a rear view showing still another example of the supporting plate.
6 is a rear view showing still another example of the supporting plate.
FIG. 7 is a surface pressure distribution analysis diagram for a conventional square bearing plate with a load of 10 tons.
FIG. 8 is a surface pressure distribution analysis diagram when the load of a conventional square bearing plate is 20 tons.
FIG. 9 is a surface pressure distribution analysis diagram when the load of a conventional conical bearing plate is 10 tons.
FIG. 10 is a surface pressure distribution analysis diagram in the case of a load of 20 tons of a conventional conical bearing plate.
[Explanation of symbols]
DESCRIPTION OF
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15430299A JP4010524B2 (en) | 1999-06-01 | 1999-06-01 | Bearing plate with conical surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15430299A JP4010524B2 (en) | 1999-06-01 | 1999-06-01 | Bearing plate with conical surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000336843A JP2000336843A (en) | 2000-12-05 |
| JP4010524B2 true JP4010524B2 (en) | 2007-11-21 |
Family
ID=15581165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15430299A Expired - Lifetime JP4010524B2 (en) | 1999-06-01 | 1999-06-01 | Bearing plate with conical surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4010524B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4500665B2 (en) * | 2004-12-22 | 2010-07-14 | 住友電工スチールワイヤー株式会社 | Load transmitting component for fixing PC tendon and prestressed concrete structure using the same |
| JP4958061B2 (en) * | 2006-03-06 | 2012-06-20 | 株式会社Ｉｈｉインフラ建設 | Replacement method for precast floor slabs for composite girder floor replacement and cast-in-place RC floor slabs for composite girder |
-
1999
- 1999-06-01 JP JP15430299A patent/JP4010524B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000336843A (en) | 2000-12-05 |
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