JP2006316535A - Bridge composite bearing - Google Patents

Bridge composite bearing Download PDF

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JP2006316535A
JP2006316535A JP2005141129A JP2005141129A JP2006316535A JP 2006316535 A JP2006316535 A JP 2006316535A JP 2005141129 A JP2005141129 A JP 2005141129A JP 2005141129 A JP2005141129 A JP 2005141129A JP 2006316535 A JP2006316535 A JP 2006316535A
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bearing
collar
key
rubber body
steel plate
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JP4549230B2 (en
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Yasuhisa Hishijima
康久 比志島
Takehiko Himeno
岳彦 姫野
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Kawaguchi Metal Industries Co Ltd
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Kawaguchi Metal Industries Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bridge composite bearing extremely simple in structure, easy in machining, and manufacturable at low cost. <P>SOLUTION: The bridge composite bearing installed between an upper structure 18 and a lower structure 12 comprises a lower bearing 1 composed of a laminated rubber bearing and an upper bearing 2 provided on the lower bearing 1, the upper bearing 1 is composed of an upper shoe 13, a lower shoe 14 and a rubber body 15 provided between the upper shoe 13 and the lower shoe 14 and transferring a vertical load of the upper structure 18 to the lower bearing 1, and enabling it to rotate in the vertical direction, the bridge composite bearing is fitted to key holes 16, 22 and 17 formed at the upper shoe 13, the hard rubber body 15 and the lower shoe 14, the shear deformation of the hard rubber body 15 is constrained, and, it is constituted by having a shear key 25 transferring a horizontal load of the upper structure 18 to the lower bearing 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、橋梁用複合支承に関し、さらに詳細には、回転機能と水平変形機能とを分離した支承に関する。   The present invention relates to a composite bearing for a bridge, and more particularly to a bearing in which a rotation function and a horizontal deformation function are separated.

従来、橋梁用の支承として水平力分散ゴム支承が知られている。これは、ゴム層と鋼板とを積層してなる積層ゴム（ゴム沓）の上下に上沓及び下沓をそれぞれ取付け、上部構造と下部構造との間に設置される支承である。この水平力分散ゴム支承においては、ゴム沓が鉛直方向に変形することにより上部構造の回転を吸収し、またせん断変形することにより上部構造の水平変位を吸収するようになっている。   Conventionally, a horizontal force dispersion rubber bearing is known as a bridge bearing. This is a support that is installed between an upper structure and a lower structure by attaching upper and lower ridges to the top and bottom of a laminated rubber (rubber ridge) formed by laminating a rubber layer and a steel plate. In this horizontal force dispersion rubber bearing, the rubber cage is deformed in the vertical direction to absorb the rotation of the superstructure, and the shear deformation is absorbed to absorb the horizontal displacement of the superstructure.

すなわち、積層ゴムは鉛直荷重支持の他に、回転機能と水平変形機能との３つの役割を担っている。このため、一つの支承に３つの機能を集約するため設計が難しく、支承の大きさも大きくなるという難点があった。このようなことから、回転機能と水平変形機能とを分離した支承、言い換えれば回転機能を持つ支承と水平変形機能を持つ支承とを複合させた支承が提案されている（特許文献１参照）。   That is, the laminated rubber has three roles of a rotation function and a horizontal deformation function in addition to the vertical load support. For this reason, since three functions are integrated into one support, the design is difficult, and the size of the support is also increased. For this reason, a bearing in which the rotation function and the horizontal deformation function are separated, in other words, a bearing in which a bearing having a rotation function and a bearing having a horizontal deformation function are combined has been proposed (see Patent Document 1).

この支承は水平変形機能を担う積層ゴム支承と、その上に設けられて回転機能を担う密閉ゴム支承板支承とからなる複合支承である。より詳細には、積層ゴム支承の上部鋼板の上面に円形の鍋状凹部（ポット）を形成し、この鍋状凹部に圧縮ゴム板を封入するとともに、上沓の下面に鍋状凹部に嵌合する嵌合凸部（ピストン）を設けた支承である。   This bearing is a composite bearing composed of a laminated rubber bearing that assumes a horizontal deformation function and a sealed rubber bearing plate bearing that is provided on the laminated rubber bearing and assumes a rotating function. More specifically, a circular pan-shaped recess (pot) is formed on the upper surface of the upper steel plate of the laminated rubber bearing, and a compression rubber plate is enclosed in the pan-shaped recess, and the lower surface of the upper bowl is fitted into the pan-shaped recess. It is the support which provided the fitting convex part (piston) to perform.

しかしながら、この従来の複合支承は、上部鋼板に鍋状凹部を、また上沓に嵌合凸部をそれぞれ一体に形成する構造を採用している。このため、加工が面倒であり、製造コストも高くなるという難点を指摘することができる。また、上揚力を受け止める手段については、何ら開示されていない。
特開２００３−６４６２２号公報 However, this conventional composite bearing employs a structure in which a pan-shaped recess is formed on the upper steel plate and a fitting protrusion is integrally formed on the upper plate. For this reason, the difficulty that processing is troublesome and manufacturing cost becomes high can be pointed out. Further, there is no disclosure about a means for receiving the lifting force.
JP 2003-64622 A

この発明は上記のような技術的背景に基づいてなされたものであって、次の目的を達成するものである。
この発明の目的は、構造が極めてシンプルで加工も容易であって、低コストで製造することができる橋梁用複合支承を提供することにある。 The present invention has been made based on the technical background as described above, and achieves the following object.
An object of the present invention is to provide a composite bearing for a bridge that is extremely simple in structure and easy to process and can be manufactured at low cost.

この発明の別の目的は、上揚力を受け止める手段を付加した橋梁用複合支承を提供することにある。   Another object of the present invention is to provide a bridge composite bearing to which means for receiving the lifting force is added.

この発明は上記課題を達成するために、次のような手段を採用している。
すなわち、この発明は、上部構造と下部構造との間に設置され、積層ゴム支承からなる下部支承と、この下部支承上に設けられる上部支承とからなる橋梁用複合支承であって、
前記上部支承は、上沓及び下沓と、
前記上沓と下沓との間に設けられて、前記上部構造の鉛直荷重を前記下部支承に伝達するとともに、鉛直方向の回転を可能とするゴム体とからなり、
前記上沓、前記ゴム体及び前記下沓にそれぞれ設けられたキー穴に嵌合され、前記ゴム体のせん断変形を拘束するとともに、前記上部構造の水平荷重を前記下部支承に伝達するせん断キーを備えてなることを特徴とする橋梁用複合支承にある。 The present invention employs the following means in order to achieve the above object.
That is, this invention is a composite bearing for a bridge that is installed between an upper structure and a lower structure and includes a lower bearing made of a laminated rubber bearing and an upper bearing provided on the lower bearing,
The upper bearing includes an upper arm and a lower arm,
It is provided between the upper and lower heels, and transmits a vertical load of the upper structure to the lower support, and comprises a rubber body that enables vertical rotation,
A shear key which is fitted in a key hole provided in each of the upper collar, the rubber body and the lower collar, restrains the shear deformation of the rubber body and transmits the horizontal load of the upper structure to the lower bearing; It is in the composite bearing for bridges characterized by being provided.

より具体的には、前記下部支承を構成する前記積層ゴム支承は、上部に前記下沓が固定される厚肉の上部鋼板を有し、前記せん断キーの下端部は前記上部鋼板の上面に設けられたキー穴に嵌合されている。この場合、前記上部鋼板が、前記下沓を兼ねている構造を採用してもよい。   More specifically, the laminated rubber bearing constituting the lower bearing has a thick upper steel plate to which the lower collar is fixed at an upper portion, and a lower end portion of the shear key is provided on an upper surface of the upper steel plate. The key hole is fitted. In this case, a structure in which the upper steel plate also serves as the lower arm may be adopted.

また、前記せん断キーは、上端部に前記上部構造の下面に設けられたキー穴に嵌合されるとともに、前記上沓と係合可能なフランジ部を有し、また前記下沓のキー穴周壁に形成された雌ねじに螺着される雄ねじ部を有している。   The shear key is fitted into a key hole provided on the lower surface of the upper structure at an upper end portion, and has a flange portion that can be engaged with the upper collar, and the key hole peripheral wall of the lower collar And a male screw portion to be screwed onto the female screw formed on the head.

この発明の複合支承によれば、構造的には、上部支承が上沓及び下沓間にゴム体を設けて、せん断キーを嵌合した簡単なものであるので、上沓及び下沓にはキー穴を設けるだけの簡単な加工を施せばよく、製造コストを安価なものとすることができる。   According to the composite bearing of this invention, structurally, the upper bearing is a simple one in which a rubber body is provided between the upper collar and the lower collar and the shear key is fitted. It is only necessary to perform a simple process of providing a key hole, and the manufacturing cost can be reduced.

また、下沓のキー穴を雌ねじ穴としてせん断キーを下沓に固定するとともに、上端部に上沓と係合するフランジ部を設けることにより、上部構造の上揚力を受け止めることができる。   In addition, by fixing the shear key to the lower rod with the keyhole of the lower rod as a female screw hole and providing the flange portion that engages with the upper rod at the upper end portion, it is possible to receive the uplift force of the upper structure.

この発明の実施形態を図面を参照しながら以下に説明する。図１は、この発明の実施形態を示す橋軸方向に沿った断面図、図２は図１のＡ−Ａ線断面図である。複合支承は積層ゴム支承からなる下部支承１と、その上に設けられる上部支承２とで構成される。下部支承である積層ゴム支承１は全体に四角柱状のもので、厚肉の上下部鋼板３，４と、薄肉の複数の中間鋼板５と、ゴム層６とを交互に積層し加硫接着して形成される。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view along the bridge axis direction showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. The composite bearing is composed of a lower bearing 1 composed of a laminated rubber bearing and an upper bearing 2 provided thereon. The laminated rubber bearing 1 which is the lower bearing is a quadrangular prism as a whole. The thick upper and lower steel plates 3 and 4, the thin intermediate steel plates 5 and the rubber layer 6 are alternately laminated and vulcanized and bonded. Formed.

下部鋼板４はせん断キー７及びボルト８を介してベースプレート９に固定され、これにより積層ゴム支承１とベースプレート９とが一体化される。このベースプレート９はアンカーボルト１０（この実施形態ではカプラー１１付き）を介して橋脚や橋台などの下部構造１２に固定される。   The lower steel plate 4 is fixed to the base plate 9 via the shear key 7 and the bolt 8, whereby the laminated rubber support 1 and the base plate 9 are integrated. The base plate 9 is fixed to a lower structure 12 such as a pier or an abutment via an anchor bolt 10 (with a coupler 11 in this embodiment).

上部支承２は上沓１３と、下沓１４と、これら上下沓１３，１４間に挟持される硬質ゴム体１５とを有している。上沓１３及び下沓１４は、いずれも四角形の鋼板からなる部材で、それぞれ中央にキー穴１６，１７が設けられている。下沓１４のキー穴１７はその周壁に雌ねじが形成された雌ねじ穴となっている。橋桁（鋼桁）である上部構造１８の下面にはソールプレート１９が溶接等により固定され、このソールプレート１９に上沓１３がセットボルト２０により固定される。下沓１４は上沓１３よりも大きく、積層ゴム支承である下部支承１と平面的な大きさがほぼ等しくなっていて、取付けボルト２１により上部鋼板３に固定されている。   The upper bearing 2 includes an upper rod 13, a lower rod 14, and a hard rubber body 15 that is sandwiched between the upper and lower rods 13 and 14. Each of the upper rod 13 and the lower rod 14 is a member made of a rectangular steel plate, and is provided with key holes 16 and 17 in the center. The key hole 17 of the lower collar 14 is a female screw hole having a female screw formed on its peripheral wall. A sole plate 19 is fixed to the lower surface of the upper structure 18 that is a bridge girder (steel girder) by welding or the like, and an upper rod 13 is fixed to the sole plate 19 with a set bolt 20. The lower rod 14 is larger than the upper rod 13 and has a planar size substantially equal to that of the lower bearing 1 which is a laminated rubber bearing, and is fixed to the upper steel plate 3 by mounting bolts 21.

硬質ゴム体１５はポリウレタンなどからなる円形の部材で、中央にキー穴２２が設けられ、したがって全体的にはドーナツ状をなしている。硬質ゴム体１５は、上下沓１３，１４間に単に挟み置かれるだけで、上下沓１３，１４には固着されていない。この硬質ゴム体１５を定位置に保持するための保持リング２３が、上下沓１３，１４の下面及び上面にそれぞれ設けられている。硬質ゴム体１５は、上部構造１８の鉛直荷重を下部支承１に伝達するとともに、外周が部分的に圧縮変形することにより上部構造１８の鉛直方向の回転を可能とする部材である。この上部構造の回転をしやすくするために硬質ゴム体１５の外周にはくびれ２４が形成されている。   The hard rubber body 15 is a circular member made of polyurethane or the like and is provided with a key hole 22 in the center, and thus has a donut shape as a whole. The hard rubber body 15 is simply sandwiched between the upper and lower rods 13 and 14 and is not fixed to the upper and lower rods 13 and 14. Holding rings 23 for holding the hard rubber body 15 in place are provided on the lower and upper surfaces of the upper and lower rods 13 and 14, respectively. The hard rubber body 15 is a member that transmits the vertical load of the upper structure 18 to the lower support 1 and enables the upper structure 18 to rotate in the vertical direction by partially compressing and deforming the outer periphery. In order to facilitate the rotation of the superstructure, a constriction 24 is formed on the outer periphery of the hard rubber body 15.

上沓１３，硬質ゴム体１５及び下沓１４の各キー穴１６，２２，１７には、せん断キー２５が嵌合されている。図３は、せん断キー２５の嵌合状態を拡大して示す断面図である。せん断キー２５は下沓１４の雌ねじ穴１７に螺着される雄ねじ部２６を有し、下端部３０は上部鋼板３の上面に形成されたキー穴２７に嵌合されている。また、せん断キー２５の上端部にはフランジ部２９が形成されている。このフランジ部２９はソールプレート１９に形成されたキー穴２８に嵌合され、下面が上沓１３と係合可能となっている。   A shear key 25 is fitted in the key holes 16, 22, and 17 of the upper collar 13, the hard rubber body 15, and the lower collar 14. FIG. 3 is an enlarged cross-sectional view showing the fitting state of the shear key 25. The shear key 25 has a male screw portion 26 screwed into the female screw hole 17 of the lower collar 14, and the lower end portion 30 is fitted in a key hole 27 formed on the upper surface of the upper steel plate 3. A flange 29 is formed at the upper end of the shear key 25. The flange portion 29 is fitted into a key hole 28 formed in the sole plate 19, and the lower surface can be engaged with the upper collar 13.

フランジ部２９の外周は湾曲面２９ａとなっている。また、フランジ部２９と上沓１３との間、せん断キー２５と上沓１３及び硬質ゴム体１５の各キー穴１６，２２の内周との間には隙間が設けられている。せん断キー２５はフランジ部２９の湾曲面２９ａでソールプレート１９のキー穴２８に周接し、また上記のような隙間が設けられていることにより、せん断キー２５によって上部構造１８の回転が阻害されない構造となっている。なお、フランジ部２９の上面に設けられた穴３１は、せん断キー２５を廻して下沓１４に螺着する際に、スパナを掛けるためのものである。   The outer periphery of the flange portion 29 is a curved surface 29a. Further, gaps are provided between the flange portion 29 and the upper collar 13 and between the shear key 25 and the inner circumference of each of the key holes 16 and 22 of the upper collar 13 and the hard rubber body 15. The shear key 25 is in contact with the key hole 28 of the sole plate 19 at the curved surface 29a of the flange portion 29, and is provided with the gap as described above, so that the rotation of the upper structure 18 is not hindered by the shear key 25. It has become. The hole 31 provided on the upper surface of the flange portion 29 is used to hang a spanner when the shear key 25 is turned and screwed to the lower rod 14.

以上のような複合支承において、上部構造１８の鉛直荷重は、上部支承２を介して下部支承１に伝達される。また、上部構造１８の水平荷重は、フランジ部２９の湾曲面２９ａを介してせん断キー２５に伝達され、その下端部３０を介して下部支承１すなわち積層ゴム支承の上部鋼板３に伝達される。これにより、積層ゴム支承１がせん断変形して上部構造１８の水平変位が吸収される。このとき、硬質ゴム体１５はせん断キー２５によって拘束されているのでせん断変形することはない。さらに、上部構造１８の回転は硬質ゴム体１５の外周が部分的に圧縮変形することにより吸収される。   In the composite bearing as described above, the vertical load of the upper structure 18 is transmitted to the lower bearing 1 through the upper bearing 2. Further, the horizontal load of the upper structure 18 is transmitted to the shear key 25 via the curved surface 29a of the flange portion 29, and is transmitted to the lower support 1, that is, the upper steel plate 3 of the laminated rubber support via the lower end portion 30 thereof. As a result, the laminated rubber bearing 1 is sheared and the horizontal displacement of the upper structure 18 is absorbed. At this time, since the hard rubber body 15 is restrained by the shear key 25, it does not undergo shear deformation. Further, the rotation of the upper structure 18 is absorbed by partial compression deformation of the outer circumference of the hard rubber body 15.

このように、水平変形機能は下部支承である積層ゴム支承１が担い、回転機能は上部支承２が担っていることから、積層ゴム支承１の鉛直ばね剛性を高めることができる。すなわち、ゴム層６の一層厚を薄くして一次形状係数を高めることにより、積層ゴム支承１の鉛直ばね剛性を高めることができる。これにより、積層ゴム支承１の鉛直たわみが抑えられるので、振動問題が解消する。また、所定のせん断ばね剛性を設定し易くなり、地震時の変位を低減することが可能となる。なお、次式で表される積層ゴム支承１の一次形状係数は１０以上とすることが好ましい。
Ｓ＝ａ・ｂ／２(ａ＋ｂ)・ｔe
ここに、Ｓ：一次形状係数、ａ，ｂ：積層ゴム支承の平面上の一辺の長さ、ｔe：ゴム層の一層厚である。 As described above, the horizontal deformation function is borne by the laminated rubber bearing 1 which is the lower bearing, and the rotating function is borne by the upper bearing 2, so that the vertical spring rigidity of the laminated rubber bearing 1 can be increased. That is, by reducing the thickness of the rubber layer 6 and increasing the primary shape factor, the vertical spring rigidity of the laminated rubber bearing 1 can be increased. Thereby, since the vertical deflection of the laminated rubber bearing 1 is suppressed, the vibration problem is solved. Moreover, it becomes easy to set a predetermined shear spring rigidity, and it becomes possible to reduce the displacement at the time of an earthquake. The primary shape factor of the laminated rubber bearing 1 represented by the following formula is preferably 10 or more.
S = a · b / 2 (a + b) · te
Here, S is the primary shape factor, a and b are the length of one side on the plane of the laminated rubber bearing, and t e is the thickness of the rubber layer.

さらに、上記複合支承では、上部構造１８に上揚力が作用した場合、せん断キー２５のフランジ部２９が上沓１３に係合するので、この係合によって上揚力を受け止めることができる。   Further, in the composite bearing, when an upward lifting force is applied to the upper structure 18, the flange portion 29 of the shear key 25 engages with the upper flange 13, so that the upward lifting force can be received by this engagement.

上記のような複合支承によれば、構造的には、上部支承が上沓１３及び下沓１４間に硬質ゴム体１５を挟持してせん断キーを嵌合した簡単なものであるので、上沓１３及び下沓１４はキー穴を設けるだけの簡単な加工を施せばよく、製造コストを安価なものとすることができる。   According to the composite bearing as described above, structurally, the upper bearing is a simple structure in which the rigid rubber body 15 is sandwiched between the upper collar 13 and the lower collar 14 and the shear key is fitted. 13 and the lower rod 14 may be simply processed by simply providing a key hole, and the manufacturing cost can be reduced.

図４は、別の実施形態を示す断面図である。この実施形態では、図１に示した上部支承２の下沓１４は、単独のものとして設けられていない。すなわち、下部支承１の上部鋼板３が上部支承２の下沓を兼ねている。上部鋼板３に設けられたキー穴２７が雌ねじ穴となっていて、この雌ねじ穴２７にせん断キー２５の下端部３０に形成された雄ねじ部２６が螺着されている。なお、上部鋼板３には保持リング２３とともに、硬質ゴム体１５を保持するための保持板２３ａが設けられている。その他の構成は、図１に示した実施形態と同様である。この実施形態の複合支承によれば、上部鋼板３が上部支承２の下沓を兼ねているので、支承全体の高さを低くすることができる。   FIG. 4 is a cross-sectional view showing another embodiment. In this embodiment, the lower collar 14 of the upper support 2 shown in FIG. 1 is not provided as a single unit. That is, the upper steel plate 3 of the lower support 1 also serves as the lower arm of the upper support 2. A key hole 27 provided in the upper steel plate 3 is a female screw hole, and a male screw portion 26 formed on the lower end portion 30 of the shear key 25 is screwed into the female screw hole 27. The upper steel plate 3 is provided with a holding ring 23 and a holding plate 23 a for holding the hard rubber body 15. Other configurations are the same as those of the embodiment shown in FIG. According to the composite bearing of this embodiment, since the upper steel plate 3 also serves as the lower arm of the upper bearing 2, the overall height of the bearing can be reduced.

上記実施形態は例示にすぎず、この発明は例えば以下に示すような種々の態様を採ることができる。
(1)上記実施形態では、上部支承２のゴム体として硬質ゴムを用いて上下沓間に挟み置かれる構造としたが、高面圧ゴム支承で用いられるゴム（内部に鋼板が埋め込まれている）のように、上下沓に加硫接着する構造とすることもできる。
(2)上記実施形態では、上部構造１８として鋼桁が示されているが、この発明は上部構造がコンクリート桁の場合でも適用できる。 The above embodiment is merely an example, and the present invention can take various aspects as shown below, for example.
(1) In the above embodiment, a hard rubber is used as the rubber body of the upper support 2 and the structure is sandwiched between the upper and lower ribs. However, the rubber used in the high surface pressure rubber support (with a steel plate embedded therein ) And vulcanized and bonded to the upper and lower ridges.
(2) In the above embodiment, a steel girder is shown as the upper structure 18, but the present invention can be applied even when the upper structure is a concrete girder.

この発明の実施形態を示す橋軸方向に沿った断面図である。It is sectional drawing along the bridge-axis direction which shows embodiment of this invention. 図１のＡ−Ａ線矢視断面図である。It is AA arrow sectional drawing of FIG. せん断キー２５の嵌合状態を拡大して示す断面図である。It is sectional drawing which expands and shows the fitting state of the shear key. 別の実施形態を示す橋軸方向に沿った断面図である。It is sectional drawing along the bridge-axis direction which shows another embodiment.

符号の説明Explanation of symbols

１ 下部支承（積層ゴム支承）
２ 上部支承
３ 上部鋼板
４ 下部鋼板
５ 中間鋼板
６ ゴム層
１２ 下部構造
１３ 上沓
１４ 下沓
１５ 硬質ゴム体
１６ キー穴
１７ キー穴（雌ねじ穴）
１８ 上部構造
１９ ソールプレート
２２ キー穴
２３ 保持リング
２５ せん断キー
２６ 雄ねじ部
２７ キー穴
２８ キー穴
２９ フランジ部
２９ａ 湾曲面 1 Lower bearing (laminated rubber bearing)
2 Upper support 3 Upper steel plate 4 Lower steel plate 5 Intermediate steel plate 6 Rubber layer 12 Lower structure 13 Upper rod 14 Lower rod 15 Hard rubber body 16 Key hole 17 Key hole (Female screw hole)
18 Superstructure 19 Sole plate 22 Key hole 23 Retaining ring 25 Shear key 26 Male thread part 27 Key hole 28 Key hole 29 Flange part 29a Curved surface

Claims (4)

上部構造と下部構造との間に設置され、積層ゴム支承からなる下部支承と、この下部支承上に設けられる上部支承とからなる橋梁用複合支承であって、
前記上部支承は、上沓及び下沓と、
前記上沓と下沓との間に設けられて、前記上部構造の鉛直荷重を前記下部支承に伝達するとともに、鉛直方向の回転を可能とするゴム体とからなり、
前記上沓、前記ゴム体及び前記下沓にそれぞれ設けられたキー穴に嵌合され、前記ゴム体のせん断変形を拘束するとともに、前記上部構造の水平荷重を前記下部支承に伝達するせん断キーを備えてなることを特徴とする橋梁用複合支承。 A composite bearing for a bridge, which is installed between an upper structure and a lower structure and includes a lower bearing made of laminated rubber bearings and an upper bearing provided on the lower bearing,
The upper bearing includes an upper arm and a lower arm,
It is provided between the upper and lower heels, and transmits a vertical load of the upper structure to the lower support, and comprises a rubber body that enables vertical rotation,
A shear key which is fitted in a key hole provided in each of the upper collar, the rubber body and the lower collar, restrains the shear deformation of the rubber body and transmits the horizontal load of the upper structure to the lower bearing; A composite bearing for bridges, characterized by comprising. 前記下部支承を構成する前記積層ゴム支承は、上部に前記下沓が固定される厚肉の上部鋼板を有し、前記せん断キーの下端部は前記上部鋼板の上面に設けられたキー穴に嵌合されていることを特徴とする請求項１記載の橋梁用複合支承。   The laminated rubber bearing constituting the lower bearing has a thick upper steel plate to which the lower collar is fixed at an upper portion, and a lower end portion of the shear key is fitted in a key hole provided on an upper surface of the upper steel plate. The composite bearing for bridges according to claim 1, wherein the bridges are combined. 前記上部鋼板は、前記下沓を兼ねていることを特徴とする請求項２記載の橋梁用複合支承。   The composite bearing for a bridge according to claim 2, wherein the upper steel plate also serves as the lower arm. 前記せん断キーは、上端部に前記上部構造の下面に設けられたキー穴に嵌合されるとともに、前記上沓と係合可能なフランジ部を有し、また前記下沓のキー穴周壁に形成された雌ねじに螺着される雄ねじ部を有していることを特徴とする請求項２又は３記載の橋梁用複合支承。   The shear key is fitted to a key hole provided on the lower surface of the upper structure at the upper end portion, and has a flange portion that can be engaged with the upper collar, and is formed on the key hole peripheral wall of the lower collar. 4. The bridge composite bearing according to claim 2, further comprising a male screw portion screwed onto the female screw.
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CN112503132A (en) * 2020-11-27 2021-03-16 谢一凡 A high-efficient bumper shock absorber for improving bridge anticollision function

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