JP6132132B2 - High performance perforated steel plate gibber - Google Patents

High performance perforated steel plate gibber Download PDF

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JP6132132B2
JP6132132B2 JP2012273890A JP2012273890A JP6132132B2 JP 6132132 B2 JP6132132 B2 JP 6132132B2 JP 2012273890 A JP2012273890 A JP 2012273890A JP 2012273890 A JP2012273890 A JP 2012273890A JP 6132132 B2 JP6132132 B2 JP 6132132B2
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perforated steel
steel plate
concrete
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gibber
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JP2014118723A (en
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輿石 正己
正己 輿石
賢司 仲山
賢司 仲山
啓明 井上
啓明 井上
吉武 謙二
謙二 吉武
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Shimizu Corp
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本発明は、土木構造物や建築構造物などのコンクリートと鋼材を接合する構造において用いられ、コンクリートと鋼材との一体化ずれ止め効果(ジベル効果)を得るために使用される孔あき鋼板ジベル(以下、PBLジベルということがある。)に関するものである。   The present invention is used in a structure that joins concrete and steel materials such as civil engineering structures and building structures, and is used to obtain an integrated displacement preventing effect (gibel effect) between concrete and steel materials. Hereinafter, it may be referred to as PBL gibber.).

従来、土木構造物や建築構造物などのコンクリートと鋼材を接合する構造において、コンクリートと鋼材との一体化ずれ止め効果(ジベル効果)を得るために孔あき鋼板ジベルが使用されている(例えば、特許文献1〜6を参照)。   Conventionally, in a structure in which concrete and steel materials such as civil engineering structures and building structures are joined, a perforated steel plate gibber is used in order to obtain an integrated displacement preventing effect (gibel effect) between concrete and steel material (for example, (See Patent Documents 1 to 6).

例えば、橋梁や高架道路などを構成する合成桁としては、鋼桁のフランジ上にコンクリートスラブを打設して、鋼桁とコンクリートスラブとからなる合成桁を用いることがある。このような合成桁では、鋼桁とコンクリートスラブとの合成を図るために、鋼桁のフランジ上にずれ止め用の孔あき鋼板ジベルを設置することにより、鋼桁とコンクリートスラブとのずれを防止して、両者を一体化している。   For example, as a composite girder constituting a bridge or an elevated road, a concrete girder composed of a steel girder and a concrete slab may be used by placing a concrete slab on a steel girder flange. In such a composite girder, in order to synthesize the steel girder and the concrete slab, a perforated steel plate gibber is installed on the flange of the steel girder to prevent deviation between the steel girder and the concrete slab. Both are integrated.

鋼桁とコンクリートを接合するために設ける孔あき鋼板ジベルとしては、図2に示すような構造が多用されている。図2に示される孔あき鋼板ジベル1は、波形鋼板ウェブ橋における波形鋼板2とコンクリートスラブ3の接合部に適用したものであり、波形鋼板2のフランジプレート4(鋼材)の表面に2枚の孔あきのリブ5(形鋼)を橋軸方向Xに併設し、対応する孔6どうしに鉄筋7を貫通させた構造である。この孔あき鋼板ジベル1は、橋軸方向Xに連続するリブ5にあけられた孔6の中のコンクリートがずれせん断作用に抵抗することによって2面せん断の挙動を呈する。さらに孔6の中に配置された貫通鉄筋7のせん断抵抗作用によって、接合部の橋軸方向水平せん断に対し、高いずれせん断抵抗性を有するとともに、非常に高いずれ剛性を有するものである。   A structure as shown in FIG. 2 is often used as a perforated steel plate gibber provided for joining steel girders and concrete. A perforated steel plate gibber 1 shown in FIG. 2 is applied to a joint portion between a corrugated steel plate 2 and a concrete slab 3 in a corrugated steel web bridge, and two pieces are provided on the surface of a flange plate 4 (steel material) of the corrugated steel plate 2. This is a structure in which perforated ribs 5 (section steel) are provided side by side in the bridge axis direction X, and the reinforcing bars 7 are passed through the corresponding holes 6. This perforated steel plate gibber 1 exhibits a two-plane shearing behavior when the concrete in the holes 6 formed in the ribs 5 continuous in the bridge axis direction X resists shearing action. Furthermore, by the shear resistance action of the penetrating rebar 7 arranged in the hole 6, it has a high shear resistance and a very high rigidity against the horizontal shear in the bridge axis direction of the joint.

一方、鋼材におけるコンクリート打設箇所にコンクリートを接合するために設けるジベルの他の形式として、例えば頭付きスタッドボルトからなるスタッドジベルが用いられることがある(例えば、特許文献1、5を参照)。上記のPBLジベルは、このスタッドジベルに比べて大きなずれ剛性を有しており、鋼材とコンクリート間に作用するせん断力を着実に伝達することができる。   On the other hand, as another type of a gibber provided for joining concrete to a concrete placement site in a steel material, for example, a stud gibber composed of a stud bolt with a head may be used (see, for example, Patent Documents 1 and 5). The PBL dowel has a larger displacement rigidity than the stud dowel, and can steadily transmit the shearing force acting between the steel material and the concrete.

特開2009−243134号公報JP 2009-243134 A 特開2010−236218号公報JP 2010-236218 A 特開2010−138685号公報JP 2010-138865 A 特開2011−219983号公報JP 2011-219983 A 特許第3917806号公報Japanese Patent No. 3917806 特許第4045994号公報Japanese Patent No. 4045994

ところで、上記の従来のPBLジベルには、次の2つの問題があった。   By the way, the above-mentioned conventional PBL dowel has the following two problems.

(1)PBLジベルのせん断耐力に関しては、ジベル周面を十分にコンクリートで拘束した場合における設計式が技術文献(土木学会複合構造標準示方書−2009年制定、2010年1月発行)に示されている。しかしながら、PBLジベルの周面拘束が小さい断面の小さなRC部材(鉄筋コンクリート部材)と、鋼材(鋼桁)との接合に関しては、明確な設計式が確立されていない。 (1) Regarding the shear strength of the PBL gibber, the design formula in the case where the circumferential surface of the gibber is sufficiently constrained with concrete is shown in the technical literature (Japan Society of Civil Engineers Composite Structure Standard Specification-Established in 2009, published in January 2010). ing. However, a clear design formula has not been established for joining a small RC member (reinforced concrete member) having a small cross section with a small peripheral constraint of the PBL dowel and a steel material (steel girder).

(2)従来のPBLジベルは主としてせん断力に抵抗することを目的としているが、断面力(軸力、曲げモーメント、せん断力)が同時に作用する場合におけるPBLジベルの性能は必ずしも明らかではない。 (2) Although the conventional PBL dowel is mainly intended to resist the shearing force, the performance of the PBL dowel when the cross-sectional force (axial force, bending moment, shearing force) acts simultaneously is not always clear.

本発明は、上記に鑑みてなされたものであって、軸力、曲げモーメント、せん断力の同時作用下においても所要の性能を発揮可能な高性能孔あき鋼板ジベルを提供することを目的とする。   The present invention has been made in view of the above, and an object of the present invention is to provide a high-performance perforated steel plate gibel that can exhibit required performance even under the simultaneous action of axial force, bending moment, and shearing force. .

上記した課題を解決し、目的を達成するために、本発明に係る高性能孔あき鋼板ジベルは、所定方向に延在する部材の延在方向とは直角方向に突設され、かつ、コンクリートに埋め込んで、前記部材と前記コンクリートとの結合を図るために使用され、突設方向について孔が一段または所定の間隔をあけて複数段に開けられた鋼板により構成される孔あき鋼板を有する孔あき鋼板ジベルにおいて、前記孔あき鋼板の前記部材に固定される側とは反対側に溶接され、支圧抵抗により軸力および曲げモーメントを伝達するフランジプレートと、前記孔あき鋼板の前記孔を貫通する貫通鉄筋と、前記孔あき鋼板の周囲において、前記孔あき鋼板の突設方向に所定の間隔で複数組配置した帯鉄筋とを備え、前記帯鉄筋は、前記孔あき鋼板の正面視で前記孔と重ならない位置に設けられ、前記部材の延在方向における前記孔あき鋼板の延在長である幅は、同時に作用する軸力、曲げモーメント、せん断力に対応できるように、前記部材の延在方向の延在長よりも短くしてあることを特徴とする。 In order to solve the above-described problems and achieve the object, the high performance perforated steel plate gibel according to the present invention is provided in a direction perpendicular to the extending direction of a member extending in a predetermined direction , and is made of concrete. A perforated steel plate having a perforated steel plate, which is used for embedding and connecting the member and the concrete, and is formed of a steel plate in which the holes are opened in a single step or a plurality of steps at a predetermined interval in the projecting direction. In a steel plate diver, a flange plate that is welded to a side opposite to the side fixed to the member of the perforated steel plate and transmits an axial force and a bending moment by a bearing resistance, and penetrates the hole of the perforated steel plate. a through rebar, Oite around the perforated steel plate, and a hoop reinforcement in which a plurality of sets arranged at predetermined intervals in the projecting direction of the perforated steel plate, the band rebar, in a front view of the perforated steel plate Previous The width, which is the extension length of the perforated steel sheet in the extending direction of the member, is provided at a position that does not overlap with the hole, so that the extension of the member can correspond to the axial force, bending moment, and shear force acting simultaneously. It is characterized in that it is shorter than the extending length in the current direction .

また、本発明に係る他の高性能孔あき鋼板ジベルは、上述した発明において、前記帯鉄筋を、前記孔あき鋼板を拘束する効果を発揮できる間隔で密に配置したことを特徴とする。   Further, another high performance perforated steel plate gibel according to the present invention is characterized in that, in the above-described invention, the band reinforcing bars are densely arranged at intervals that can exert an effect of restraining the perforated steel plate.

本発明によれば、部材に突設され、かつ、コンクリートに埋め込んで、前記部材と前記コンクリートとの結合を図るために使用され、孔が一段または複数段に開けられた鋼板により構成される孔あき鋼板を有する孔あき鋼板ジベルにおいて、前記孔あき鋼板の前記部材に固定される側とは反対側に溶接したフランジプレートと、前記孔あき鋼板の周囲に配置した帯鉄筋とを備えるので、作用する軸力(引抜力)、曲げモーメントに対して、フランジプレート前面のコンクリート支圧抵抗により大きな抵抗力を発揮することができる。また、作用するせん断力に対して、フランジプレートが孔あき鋼板の曲げ変形を防止し、残留ずれ変位を低減することが可能である。したがって、軸力、曲げモーメント、せん断力の同時作用下においても所要の性能を発揮可能な孔あき鋼板ジベルを提供することができるという効果を奏する。   According to the present invention, a hole is formed by a steel plate that is provided on a member and is embedded in concrete and used to bond the member and the concrete, and the hole is formed in one or more steps. In a perforated steel plate gibber having a perforated steel plate, since it comprises a flange plate welded to the side opposite to the side fixed to the member of the perforated steel plate, and a band reinforcing bar arranged around the perforated steel plate, the action A large resistance force can be exerted by the concrete bearing resistance on the front surface of the flange plate against the axial force (pulling force) and bending moment. Further, the flange plate can prevent the bending deformation of the perforated steel sheet against the acting shear force, and the residual displacement can be reduced. Therefore, there is an effect that it is possible to provide a perforated steel plate gibel that can exhibit the required performance even under the simultaneous action of the axial force, the bending moment, and the shearing force.

図1は、本発明に係る高性能孔あき鋼板ジベルの実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of a high performance perforated steel plate gibber according to the present invention. 図2は、従来の孔あき鋼板ジベルを示す斜視図である。FIG. 2 is a perspective view showing a conventional perforated steel plate gibber.

以下に、本発明に係る高性能孔あき鋼板ジベルの実施の形態を図面に基づいて詳細に説明する。なお、以下においては橋梁や高架道路などを構成する合成桁、すなわち鋼桁とコンクリート部材とを接合してなる合成桁に使用される高性能孔あき鋼板ジベルの場合について説明するが、この実施例によりこの発明が限定されるものではない。   Embodiments of a high performance perforated steel plate gibber according to the present invention will be described below in detail with reference to the drawings. In the following, a description will be given of a case of a high performance perforated steel plate gibel used for a composite girder constituting a bridge, an elevated road, etc., that is, a composite girder obtained by joining a steel girder and a concrete member. However, the present invention is not limited to the above.

図1に示すように、本発明に係る高性能孔あき鋼板ジベル10は、鋼桁フランジプレート12(部材)に溶接により突設され、かつ、コンクリート部材14(コンクリート)に埋め込んで、鋼桁フランジプレート12とコンクリート部材14との結合を図るために使用されるものである。この孔あき鋼板ジベル10は、孔あき鋼板16と、フランジプレート20と、孔あき鋼板16の周囲に配置した帯鉄筋22(スターラップ)とを備えている。   As shown in FIG. 1, a high performance perforated steel plate gibber 10 according to the present invention protrudes from a steel girder flange plate 12 (member) by welding and is embedded in a concrete member 14 (concrete). This is used to connect the plate 12 and the concrete member 14 together. The perforated steel plate gibber 10 includes a perforated steel plate 16, a flange plate 20, and a band rebar 22 (stirrup) disposed around the perforated steel plate 16.

フランジプレート20は、孔あき鋼板16の鋼桁フランジプレート12に固定される側16aとは反対側16bに溶接してある。また、孔あき鋼板16には複数の孔18が開けてある。孔18は、鋼桁フランジプレート12の橋軸方向Xおよび直角方向Y(突設方向)についてそれぞれ所定間隔をあけて複数設けられる。また、各孔18には貫通鉄筋24が貫通配置してある。なお、図の例では孔18を方向Xに3個、方向Yに2個設けた場合を示しているが、これに限るものではなく、例えば孔18を方向Yに1個(一段)、あるいは3個以上(複数段)に設けるようにしても構わない。   The flange plate 20 is welded to the side 16b opposite to the side 16a fixed to the steel girder flange plate 12 of the perforated steel plate 16. The perforated steel plate 16 has a plurality of holes 18. A plurality of holes 18 are provided at predetermined intervals in the bridge axis direction X and the perpendicular direction Y (projecting direction) of the steel girder flange plate 12. Further, a penetration reinforcing bar 24 is disposed through each hole 18. In the example shown in the figure, three holes 18 are provided in the direction X and two holes 18 are provided in the direction Y. However, the present invention is not limited to this. For example, one hole 18 in the direction Y (one step), or Three or more (multiple stages) may be provided.

孔あき鋼板16の形状は、軸力(引抜力)、曲げモーメント、せん断力に対応できるように、従来のPBLジベルに比べて幅(橋軸方向Xの延在長L)を狭く、かつ、コンクリート部材14に対する埋込長Hを長くしてある。   The shape of the perforated steel plate 16 is narrower in width (extended length L in the bridge axis direction X) than the conventional PBL gibber so as to correspond to axial force (pulling force), bending moment, and shearing force, and The embedding length H with respect to the concrete member 14 is increased.

また、帯鉄筋22は、孔あき鋼板16の突設方向Yに所定の間隔Dで複数組配置してあるが(図の例では3組配置)、孔あき鋼板16を拘束する効果を十分に発揮できる最小の間隔で密に配置することが好ましい。   In addition, a plurality of sets of band reinforcing bars 22 are arranged at a predetermined interval D in the projecting direction Y of the perforated steel plate 16 (three sets are arranged in the example in the figure), but the effect of restraining the perforated steel plate 16 is sufficient. It is preferable to arrange them closely with a minimum interval that can be exhibited.

上記のように構成した本発明の高性能孔あき鋼板ジベル10によれば、作用する軸力(引抜力)、曲げモーメントに対して、フランジプレート20前面のコンクリート支圧抵抗により大きな抵抗力を発揮することができる。また、作用するせん断力に対して、フランジプレート20が孔あき鋼板16の曲げ変形を防止し、残留ずれ変位を低減することが可能である。   According to the high performance perforated steel plate gibber 10 of the present invention configured as described above, a large resistance force is exerted by the concrete bearing resistance on the front surface of the flange plate 20 against the acting axial force (pulling force) and bending moment. can do. Further, the flange plate 20 can prevent bending deformation of the perforated steel plate 16 against the acting shearing force, and the residual displacement can be reduced.

このため、従来のPBLジベルは主としてせん断力に抵抗するものであるが、本発明の高性能孔あき鋼板ジベル10によれば、軸力、曲げモーメント、せん断力の同時作用下においても所要の性能を発揮することができる。   For this reason, the conventional PBL dowel mainly resists the shearing force. However, according to the high performance perforated steel plate gibel 10 of the present invention, the required performance is obtained even under the simultaneous action of axial force, bending moment and shearing force. Can be demonstrated.

また、従来のPBLジベルは、孔あき鋼板ジベルの周面を十分に拘束するコンクリートが必要であったが、本発明の高性能孔あき鋼板ジベル10によれば孔あき鋼板16の形状寸法を縮小するとともに、孔あき鋼板16周面を帯鉄筋22で補強することにより、小さな断面のRC部材と鋼桁との連結が可能になるという効果も期待できる。   In addition, the conventional PBL dowel requires concrete that sufficiently constrains the peripheral surface of the perforated steel plate dowel. However, according to the high performance perforated steel plate dowel 10 of the present invention, the shape of the perforated steel plate 16 is reduced. In addition, by reinforcing the peripheral surface of the perforated steel plate 16 with the band reinforcing bar 22, an effect that the RC member having a small cross section and the steel beam can be connected can be expected.

また、例えばシールドセグメントとそれに連結するRC構造物を本発明の高性能孔あき鋼板ジベルを用いて連結する場合には、シールド内部における配筋、型枠、コンクリート打ち込み等の作業を省略できるという効果も期待できる。このようにすれば、外面接合工法が可能になる。   In addition, for example, when connecting the shield segment and the RC structure connected thereto using the high performance perforated steel plate gibber of the present invention, it is possible to omit operations such as bar arrangement, formwork, and concrete driving inside the shield. Can also be expected. In this way, an outer surface joining method can be performed.

また、本発明と従来のPBLジベルの性能を比較すると、本発明のPBLジベルの引抜き耐力は、従来のPBLジベルの概ね2.3倍になると考えられる。また、本発明のPBLジベルの曲げ耐力は、従来のPBLジベルの概ね1.6倍になると考えられる。また、本発明のPBLジベルのせん断特性としては、設計荷重時における残留ずれ変位は従来のPBLジベルの0.5倍になると考えられる。   Further, when comparing the performance of the present invention with that of a conventional PBL dowel, it is considered that the pulling-out strength of the present invention is approximately 2.3 times that of the conventional PBL dowel. The bending strength of the PBL dowel of the present invention is considered to be approximately 1.6 times that of the conventional PBL dowel. Further, as the shear characteristics of the PBL dowel of the present invention, it is considered that the residual displacement at the time of design load is 0.5 times that of the conventional PBL dowel.

以上説明したように、本発明によれば、部材に突設され、かつ、コンクリートに埋め込んで、前記部材と前記コンクリートとの結合を図るために使用され、孔が一段または複数段に開けられた鋼板により構成される孔あき鋼板を有する孔あき鋼板ジベルにおいて、前記孔あき鋼板の前記部材に固定される側とは反対側に溶接したフランジプレートと、前記孔あき鋼板の周囲に配置した帯鉄筋とを備えるので、作用する軸力(引抜力)、曲げモーメントに対して、フランジプレート前面のコンクリート支圧抵抗により大きな抵抗力を発揮することができる。また、作用するせん断力に対して、フランジプレートが孔あき鋼板の曲げ変形を防止し、残留ずれ変位を低減することが可能である。したがって、軸力、曲げモーメント、せん断力の同時作用下においても所要の性能を発揮可能な孔あき鋼板ジベルを提供することができる。   As described above, according to the present invention, the projection is provided on the member and embedded in the concrete, and is used to connect the member and the concrete. In a perforated steel plate dowel having a perforated steel plate constituted by a steel plate, a flange plate welded to a side opposite to the side fixed to the member of the perforated steel plate, and a belt reinforcing bar disposed around the perforated steel plate Therefore, a large resistance force can be exerted by the concrete bearing resistance on the front surface of the flange plate against the acting axial force (pulling force) and bending moment. Further, the flange plate can prevent the bending deformation of the perforated steel sheet against the acting shear force, and the residual displacement can be reduced. Therefore, it is possible to provide a perforated steel plate gibel that can exhibit the required performance even under the simultaneous action of axial force, bending moment, and shearing force.

以上のように、本発明に係る高性能孔あき鋼板ジベルは、土木構造物や建築構造物などのコンクリートと鋼材を接合する構造において用いられ、コンクリートと鋼材とのずれ止め効果(ジベル効果)を得るために使用される孔あき鋼板ジベルに有用であり、特に、断面力(軸力、曲げモーメント、せん断力)の同時作用下においても所要の性能を発揮するのに適している。   As described above, the high-performance perforated steel plate gibel according to the present invention is used in a structure in which concrete and steel materials such as civil engineering structures and building structures are joined, and has an effect of preventing slippage between the concrete and steel materials (gibel effect). It is useful for perforated steel plate gibbels used for obtaining, and is particularly suitable for exhibiting the required performance even under the simultaneous action of cross-sectional forces (axial force, bending moment, shearing force).

10 高性能孔あき鋼板ジベル
12 鋼桁フランジプレート(部材)
14 コンクリート部材(コンクリート)
16 孔あき鋼板
16a 固定される側
16b 反対側
18 孔
20 フランジプレート
22 帯鉄筋
24 貫通鉄筋
10 High performance perforated steel plate gibber 12 Steel girder flange plate (member)
14 Concrete members (concrete)
16 Perforated steel plate 16a Fixed side 16b Opposite side 18 Hole 20 Flange plate 22 Reinforcing bar 24 Penetration reinforcing bar

Claims (2)

所定方向に延在する部材の延在方向とは直角方向に突設され、かつ、コンクリートに埋め込んで、前記部材と前記コンクリートとの結合を図るために使用され、突設方向について孔が一段または所定の間隔をあけて複数段に開けられた鋼板により構成される孔あき鋼板を有する孔あき鋼板ジベルにおいて、
前記孔あき鋼板の前記部材に固定される側とは反対側に溶接され、支圧抵抗により軸力および曲げモーメントを伝達するフランジプレートと、
前記孔あき鋼板の前記孔を貫通する貫通鉄筋と、
前記孔あき鋼板の周囲において、前記孔あき鋼板の突設方向に所定の間隔で複数組配置した帯鉄筋とを備え
前記帯鉄筋は、前記孔あき鋼板の正面視で前記孔と重ならない位置に設けられ、
前記部材の延在方向における前記孔あき鋼板の延在長である幅は、同時に作用する軸力、曲げモーメント、せん断力に対応できるように、前記部材の延在方向の延在長よりも短くしてあることを特徴とする高性能孔あき鋼板ジベル。
Projecting in a direction perpendicular to the extending direction of the member extending in a predetermined direction , and embedded in the concrete and used for connecting the member and the concrete, the hole is formed in one step in the projecting direction. In a perforated steel plate gibber having a perforated steel plate composed of steel plates opened at a plurality of stages at predetermined intervals ,
A flange plate that is welded to a side opposite to the side fixed to the member of the perforated steel plate, and transmits axial force and bending moment by bearing resistance;
A penetrating rebar that penetrates the hole of the perforated steel sheet;
Oite around the perforated steel plate, and a hoop reinforcement in which a plurality of sets arranged at predetermined intervals in the projecting direction of the perforated steel plate,
The rebar is provided at a position that does not overlap the hole in the front view of the perforated steel sheet,
The width, which is the extension length of the perforated steel sheet in the extension direction of the member, is shorter than the extension length of the member in the extension direction so that it can correspond to the axial force, bending moment, and shear force acting simultaneously. high-performance perforated steel dowel, characterized in that you have.
前記帯鉄筋を、前記孔あき鋼板を拘束する効果を発揮できる間隔で密に配置したことを特徴とする請求項1に記載の高性能孔あき鋼板ジベル。 The high-performance perforated steel plate gibel according to claim 1, wherein the band reinforcing bars are densely arranged at intervals that can exert an effect of restraining the perforated steel plate.
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