DE1484348A1 - Tendon anchorage for prestressed concrete parts - Google Patents

Description

Tendon anchorage for prestressed concrete component ¹

"Jiο i'irfimlung concerns a tendon anchoring for prestressing tonbuuteile, consisting of a 3-point tensioning anchor resp. .'Oaie lea 'tendon screwed on' 'uttor and a conical

'\ nkerplatto, Ήβ yourself with ihi * err. lower ^ and on one dismisses »t.

In the case of a well-known reduction of this kind, the anchor is used; . ei nor llnnvandiren ^ ylinflri see Ilttlee formed VorV krones introduced into it forces; overhung by einon stick 3oherverbund of eel nan lateral surfaces ^r * transfer uf the concrete nai8 _f if he lie tension in the truss from eto η concreted Trrird. "The introduction begins here directly on the surface of the structural concrete. With the diaeor bokannton anchoring, only relatively small forces can be exceeded" because the anchor plate is not supported by its full lower ring edge, but only with one tongue on the anchoring ring * and is in the ^ anankerun ^ srlnf initiated

not distributed on a larger flat

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BAD ORSGiNAL

_έ β eind even have hot 3panngliedverankerune 's conical anchor Pletten known · di · rest her old "lower ring edge rollfläohig. Here, however, the tension force from the anchor plate is applied directly to the surface of the structural concrete. If the favorable load-bearing effect of the shell-shaped anchor plate is to be used, it may only be supported on the concrete at its lower iaad along a relatively small area. The contact area between the Aaker area and the 3etoa is therefore relatively small, o that rather high compressive stresses occur here. In the case of very high tension forces, the permissible compressive stresses, even in high-strength concretes, will soon be exceeded.

AIr the tension Glienicke anchorage are! Already Ankfcrplatten known which are in len trust ^ erkebeton Invited «« «n, uieee known. \ Nkerplatten, gagea Me the Ankeraiufcter Uiit supported a .vingschulter, sini at its lower Äand udt a groove provided , so that the anchor plate becomes smaller in the direction of force. These known anchor plates therefore act on the concrete like a wedge, through which significant gap tensile forces are introduced into the structural concrete. They can therefore only be used with their own 3aucodies and require a large gap to be approved.

The task of the tightening is to avoid these disadvantages and to create a tendon anchoring that is simple and cheap and even possible, maximum prestressing forces of 200 tons and extremely small. space -from the tendon to the structure .concrete tu exceeded. 909805/0689 _B AD ORIGINAL

As a result, the invention is solved because the anchoring ring is designed as a cone-shaped fiaube, which is concreted into the component to be clamped and on whose smaller base ring the edge of the anchor plate rests τοίΐ-shaped and their larger base ring which is introduced into the hood and transfers the tensioning force to the concrete supporting structure.

The fact that the cone-shaped anchor plate is placed on a cone-shaped bellows hood has the advantage that much brighter textures can be transmitted in the anchor plate and hood, since the hood absorbs higher structural stresses than the sound of the structure. Be through the hood that which has been transferred to you meets a larger Structural sound initiated. T) Ie hood does not suffer any deformations and keeps splitting forces «τοη der fttfc · l «t« nob «rflJLoh · farm. Iar · Ckiatalt lat la Wirteehaftlioh «r Wal- ·· d «a natural flood of forces and the Jruokepanaungen occurring in the Bertlhrungafläoh« awla «n building ·· uad B« ton überaehrcltea looks like the lruokf «etigk * it d ·« concrete.

The hood is in the d «a rorsuapann« and a component is fully coated and its body and / or inner shell is formed by an ara coating, the oil consisting of a hard filling Toroidal core tightly encased Since the filling of the hood cannot move to the side, it is able to absorb a far greater pressure force than corresponds to the nature of the material. The anchoring elements therefore only need to have a very small diameter, so that on keeln ^Ä ^

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et et space a large number of anchorages who housed can.

According to the finding, the outer reinforcement of the hood from Wire coils old formed close together, but the outer and / or inner / rnierune of the pigeon can also consist of a sheet steel jacket. As a result, the cost of materials is relatively low and the elements have individual elements just a very light weight. Nevertheless let a flawless Load transfer given and those occurring under the clamping force Deformations are kept to a minimum.

The lining of the ring-shaped stave can be concrete or plastic be used. These materials are proportionate cheap, so that the anchoring elements can also be produced at the 3auetelle itself at low cost if necessary.

According to the invention, the smaller circular surface of the hood facing the anchor plate is armored with a steel ring plate, which is expediently welded to the reinforcement of the hood. The forces carried by the anchor plate on the hood can only be applied there in the filling auav / irken, where this is prevented by the outer and inner lateral surface from giving way to the side. At the same time, the outer and inner lateral surface are connected to one unit by the oirigo-welded iJtu'il ring plate and form a closed fora, ia the jie i; ohno 5c ^: iwieri _d : l <: «i ten oin ^^ ractit ./ place placer ^ n. FCarm.

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Since the Sioleittuie is so high that it is intended for anchoring aaeh the finishing, there are even minor sxaent ^ i2ities ee ^v r disturbances: make noticeable, a zeatrical ring or Seatrial pins are engraved in the underside of the anchor plate, oll »intervene in the rear hood. 3cicu Vufseteen the anchor plate on lie ei ob e ton! or t <? arbor vird 4crdurch ersieXt a eehr high Pafigeoanigkelt, ohno Dafi a tleaa- or wedge effect occurs * 3anf.it a "eton at α ^ ^r inbetcnierea the Iaube Ii. in »Inner?

jelan ^ t, -iiri. äie rin <3fi5rmic € -Iaube

ao 'iuo ^ e ^ ll ^ ot, let them embrace 3ie ypannkamcsraunklciaunc. Here elti ^ the exact £ W

un-1 l ^T auba secured.

against duroh * ird the same Kelti ^ the exact £ WM »* true $ I.3ce of

"jfin ^ ung is explained by means of 2eicVnun & an '.land, an aueftt ^ runyebeiapielee nö» t «r, which a ripannplleäverenkerttcii l« a

in -lein downpipe 1 lancnbe-reclic ^ arranged * "Trennirlied>" eau β apreren, to "inem Uundel zueacaengcfaeten tension wires 2, lie zv'ischen let itegelfBrB · ^ thickened" nio a · tension anchor * U and a conical f-nkerMllee 4 enclosed with an. On ä # ß -j-annarker 3 we ^ a? U £ ausigft ^ it uni ^u l er! urea da «tension member stretched and the fip & nkra.Ct assigned to this stretched. The tensioning anchor 3 has a thread 5 _t on la «the ankhautter on ^ oec * iraubt Ip ⁺ -, with which the tendon is suspended in aoinor der.racbt» n? fan.amvj enteproohendl ^ ede ^v nton Ta «?«? ^ at ^ will hold. ? ie * .nkrrnwttcr 6 «tilt κ * ei oh ^ iton a ^ kor ^ lföruiiiie anchor plate 7 au» -tabl ab. ^:) ic conical aur.biliunc dor anchor plate has the advantage that all under the 1 anchor nut 6

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sustained clamping force suffers practically no deformation and therefore his canoe is relatively light.

In order to be able to determine the dimensions of the bearing surface 8 of the anchor plate 7 independently of the respective permissible Ueton compressive stress or the concrete strength de3 and to be able to limit it to a length, the anchor plate Jciy is not based directly on the token body 9 but on a cone-shaped hood 1o which in turn introduces the compressive forces into the concrete of the Juukb'rpers "^.

The kegelstuiapfforiaige aaube 1o is concreted into the Jau body 9 and consists of a steel ring plate 11, which is a cylindrical sleeve 18 made of sheet steel and a conical wire helix 12 with tightly lying .indungen is welded. The del of the Jtahlringplatte 11, the sleeve 18 and the Jraht.ion 12 Johlraum formed is filled iuit 3eton and ^forms;: a tapered Vin £ core 13. The hood kegelstumpfförciige to> is prepared from its individual parts in mass production on site or in the ready- Delivery mechanism assembled to form the load-transferring anchoring element. Here, the metal parts are twisted together and filled with high-quality concrete, which is introduced and compacted in the usual way, co

_o As the drawing shows, it includes the frustoconical

cn _Ä

^ * 'Pigeon 1o with ± ner sleeve 1δ the 3pannkamiaerausklsiaung 14 on their

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rem front 2nde in such a way that the steel ring plate 11 with the front edge 15 de3 building structure 9 is flush. Below the ke-

Hood 1o is a Kundstahl-

epirale 16 arranged, which serves ale split tensile reinforcement. - 7 -

BATH

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Since> the hood 1o is concreted in the structure 9, the bond is ensured and a full-surface support of the larger one Base ring surface 19 guaranteed on the structural concrete, so that perfect power transmission is possible.

The frustoconical hood is characterized by its relatively low weight and a ^ n. low cost of materials. Through the arrangement corresponding to the T'materialeigenaohaften Individual parts 11, 12, 13 and 18 and the frustoconical pora of the hood create an optimal effect that corresponds to that of a sand pot *) The 3-ring steel plate 11 transmits the Tension force on the concrete of the lung core 13, which is laterally limited by the wire helix 12 and the cylindrical sleeve 13. Here, the poorer reinforcement 12 only suffers tensile stresses and the inner reinforcement 18 only compressive stresses, since they are applied to it • absorbs acting radial forces like an arch. Since the Concrete filling 13 cannot move to either side, it is able to absorb practically unlimited forces.

The cone angle of the frustoconical hood 1o is adapted to the natural course of tension. By changing the height of the truncated cone, the base ring surface 19 can then be dimensioned that the permissible Betondruok stresses are not exceeded when introducing the tension forces in this joint.

The anchor plate 7 let nit holes 2o, 21 provided for Venting and Ausprenoen deo tendon ducts serve. She knows also on its outer surface on a paragraph 22 on which the

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ORIGINAL

The prestressing jack is supported when the tendon is tensioned can. On the underside of the anchor plate 7 centering pins or a Zeatrierring 23 are inserted, which engage in the 3paankaoamer lining 14 and a precise centering of the Allow anchor plate 7.

BATH ORIGINAL

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Claims (1)

Registration number. 34 Ϊο7 7 / VTb I Fi ion I koln. de * Customs officer am · specify New patent claims (U jbpaaaelied anchoring «for prestressed concrete components» consisting aas one on the tension anchor bsw. dae end of aafg «» ohraubttn ltatttr and «la« rk «f« lfl5rslx «n AnVerpl * tt ·, <ti« «praises her *« lower TlidJ * äi »ff * ine μ v © r» n-JEerun «* srlae« b «tat« t _v d * duroh fekeaaseiohnet »Aafi ^ er» nlterangerln «: al« kecaletuspfförelg «hood do) det let, dl · la d« n voreuepejaneodefc component set in concrete did and «α / whose smaller OraadrlRfflltefc · (17) d «R τ? _η η4 der Ankerplatt · (7) roller float ice and 3 er en rrOß «» - r «Orandringntleho (19) die ta 41 · Hanbo (ίο) aaf the door "*" kebetonn (9) surpasses. aat _v Askli Ji * üuflere and / or inner W "ntelfl * oh" the Kaab · (1o) from einor Araieruo ^ (12, IS) co * ird _v ia au iie "a hard precipitation bontehen-lon ο sera (13) tightly fit. Q ₀ 3 · "'Pfwitv ^ lie * Sforszdtaru & a * ¹ RACh Ληβρτ ^ ο ^: 1 or 2» <t «t * ur <) ^T < ^ iKULselohnett dae the ludere Artderuos (12) of the hood (Ie) ▼ on Drahtwfeadeoi old close together 31 ninth fe- (Art. 7, Paragraph 1, Paragraph 2, No. 1, Clause 3 of the Amendment Act of 4. aj9qj> .. BATH ORIGINAL JO 4 · Spaniyrliedveranfcerun / r naoh «in *« 4 »r Mifr-rfiah * 1 to 3, thereby £ e! R * nn ** iia> met, * ηβ <! Ie ltufter '* and / or inner« Araierung (16 ) represents hood (to) from eini "r ttahlbleehaantel wlr.1. 3paaa / jli «idv» yan »« run, Br nach · 1η # ιβ lör 4cijT »rUch · 1 ble A, rtaduroh g # lcenne * icbn # t, ^ aS dl« ^ irt · »Tlfllung (13) der ffaul) β iu »concrete 6. Jpannslieiiverankeruag naoh «inen d *» r inftprüch «1 to 5, dadaroh g «kennaeichn« t, d * 0 dl «h» rt «Ellung (13) der 'dove from art β to ff 7 »ffpa member anchors; According to a 4 # sr claim “1 to 6, characterized in that the smaller base ring face” (17) facing the plate (7) is armored with a steel plate (11) that “wakes up” .t the armlertiOiar (12-18) of the hood (1o) is vtreo-welded. β. Spaunfflledverankernnff naoh a "4or 4n" t "rfJohe 1 to 7, thereby jelcamiaeichnet that in lov 'fntemoite of the anchor plate (7) a centering ring (23) or ZwntT-ieretifte are embedded, which ir. The ring-shaped faub" (to) - after * i a »* Λ * τ AneprUohe 1 bi» B, 909805 / 0S89 BATH ORIGINAL characterized in that 3ir rir.nfiJrmige 'pigeon (io) a · (14) encompasses. 909805/0689 ^ BAD ORIGINAL