JP6338563B2 - Tower structure - Google Patents

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JP6338563B2
JP6338563B2 JP2015216064A JP2015216064A JP6338563B2 JP 6338563 B2 JP6338563 B2 JP 6338563B2 JP 2015216064 A JP2015216064 A JP 2015216064A JP 2015216064 A JP2015216064 A JP 2015216064A JP 6338563 B2 JP6338563 B2 JP 6338563B2
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tower
foundation
seismic isolation
isolation device
base portion
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JP2017089109A (en
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貴博 野田
貴博 野田
田中 健介
健介 田中
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Mitsubishi Heavy Industries Machinery Systems Co Ltd
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本発明は、地盤から鉛直方向に延びる煙突の筒身などの第一構造体と、第一構造体の周囲の少なくとも一部に配置され地盤に接続されて第一構造体を支持する鉄塔などの第二構造体と、を備える塔状構造物に関するものである。   The present invention includes a first structure such as a chimney cylinder extending in the vertical direction from the ground, a steel tower that is disposed at least partially around the first structure and is connected to the ground to support the first structure. And a second structural body.

従来、例えば、特許文献1に示される免震型鉄塔は、複数の脚部を有した鉄塔の各脚部と、鉄塔を支持する建屋などの下部構造との間に免震装置がそれぞれ介装されている。   Conventionally, for example, in a seismic isolation type tower shown in Patent Document 1, a seismic isolation device is interposed between each leg of a tower having a plurality of legs and a lower structure such as a building that supports the tower. Has been.

また、例えば、特許文献2に示される鉄塔用免震装置は、鉄塔の複数の脚と、鉄塔が立設されたビルなどの下部構造体との間に装備される免震装置である。   Moreover, for example, the seismic isolation device for a steel tower shown in Patent Document 2 is a seismic isolation device equipped between a plurality of legs of a steel tower and a lower structure such as a building in which the steel tower is erected.

また、例えば、特許文献3に示される内部煙筒吊支え式煙突は、外側支持構造体に免震部材を介装した荷重支持手段により内部煙筒の上部を吊支え式に支持すると共に、該内部煙筒の下部外周面を外側支持構造体の側面支持手段により上下方向に沿ってスライド可能に支持し、荷重支持手段と側面支持手段とによる各支持位置の間における内部煙筒の側面を少なくとも水平方向の振動エネルギを吸収する減衰器を介して外側支持構造体に接続している。   Further, for example, an internal smoke cylinder suspension support type chimney disclosed in Patent Document 3 supports the upper part of the internal smoke cylinder in a suspension support type by a load support means having a seismic isolation member interposed in the outer support structure, and the internal smoke cylinder Is supported by the side support means of the outer support structure so as to be slidable in the vertical direction, and at least the horizontal side surface of the inner smoke tube is vibrated between the support positions by the load support means and the side support means. It is connected to the outer support structure via an attenuator that absorbs energy.

特開2001−182371号公報JP 2001-182371 A 特開2002−030830号公報JP 2002-030830 A 特開2000−064661号公報JP 2000-064661 A

上述した特許文献1,2は、鉄塔により筒身を支持する塔状構造物ではなく、鉄塔が建屋やビルなどの下部構造の屋上に設置されたもので、鉄塔の脚と下部構造との間に免震装置を設けている。   Patent Documents 1 and 2 mentioned above are not tower-like structures that support the cylinder body by a steel tower, but a steel tower installed on the roof of a lower structure such as a building or a building, between the legs of the steel tower and the lower structure. Has a seismic isolation device.

また、上述した特許文献3は、鉄塔により筒身を支持する塔状構造物であるが、筒身の下端が固定されておらず排煙ダクトが接続されており、筒身の上端部および側部を鉄塔に対して制震構造により支持している。   In addition, Patent Document 3 described above is a tower-like structure that supports a cylinder by a steel tower, but the lower end of the cylinder is not fixed and a smoke exhaust duct is connected, and the upper end and the side of the cylinder are connected. Is supported by a seismic control structure against the steel tower.

ところで、地盤から鉛直方向に延びる筒身などの第一構造体は、下端が地盤に接続されて上端が自由であるため、地震などの振動により大きな揺れを伴う。このため、第一構造体と、第一構造体の周囲の少なくとも一部に配置され地盤に接続されて第一構造体を支持する鉄塔などの第二構造体と、を備える塔状構造物が一般に知られている。   By the way, the first structure such as a cylinder extending vertically from the ground is greatly shaken by vibration such as an earthquake because the lower end is connected to the ground and the upper end is free. For this reason, a tower-like structure provided with a first structure and a second structure such as a steel tower that is arranged at least partially around the first structure and is connected to the ground and supports the first structure. Generally known.

近年、このような塔状構造物に対し、設計地震外力が大きく設定されている。この場合、一般に知られている塔状構造物において、第一構造体である筒身の壁厚を厚くしたり、第二構造体である鉄塔の脚や梁を太くしたりして強度を増すと、主要部材が増加するため製造コストが増大化する問題がある。   In recent years, a design earthquake external force has been set large for such a tower-like structure. In this case, in a generally known tower-like structure, the wall thickness of the cylindrical body as the first structure is increased, or the legs and beams of the steel tower as the second structure are increased to increase the strength. And there is a problem that the manufacturing cost increases because the number of main members increases.

そこで、上記塔状構造物に対し、例えば、特許文献1,2に示すような免震装置を、地盤と煙突筒身の下端との間、および地盤と鉄塔の下端との間に設けた場合、煙突筒身全体が地盤に対して水平方向に相対変位するため、煙突筒身と煙突筒身に接続される排煙ダクトとの接続部分や、排煙ダクト自体に、煙突筒身の相対変位を吸収するエキスパンションジョイントが必要になる。   Therefore, for the above tower-like structure, for example, a seismic isolation device as shown in Patent Documents 1 and 2 is provided between the ground and the lower end of the chimney cylinder, and between the ground and the lower end of the steel tower. Because the entire chimney cylinder is relatively displaced in the horizontal direction with respect to the ground, the relative displacement of the chimney cylinder at the connection between the chimney cylinder and the smoke exhaust duct connected to the chimney cylinder or at the exhaust duct itself An expansion joint that absorbs water is required.

また、上記塔状構造物に対し、例えば、特許文献3に示すような制震構造を、煙突筒身と鉄塔との間に適用した場合、地震外力を吸収することができるが、大きく設定された設計地震外力を吸収することは難しい。   Further, for example, when a damping structure as shown in Patent Document 3 is applied between the chimney cylinder and the steel tower, the external force of the earthquake can be absorbed with respect to the tower-like structure. It is difficult to absorb the design seismic external force.

本発明は、上述した課題を解決するものであり、地盤から鉛直方向に延びる煙突筒身などの第一構造体と、第一構造体の周囲の少なくとも一部に配置され地盤に接続されて第一構造体を支持する鉄塔などの第二構造体と、を備える塔状構造物であって、大きな地震外力を吸収することのできる塔状構造物を提供することを目的とする。   The present invention solves the above-described problem, and is arranged in a first structure body such as a chimney cylinder extending vertically from the ground and at least part of the periphery of the first structure and connected to the ground. An object of the present invention is to provide a tower-like structure including a second structure such as a steel tower that supports one structure, which can absorb a large earthquake external force.

上述の目的を達成するために、本発明の塔状構造物は、鉛直方向に延びる第一構造体と、前記第一構造体の周囲の少なくとも一部に配置されて前記第一構造体を支持する第二構造体と、前記第一構造体の下端を地盤に連結する第一基礎部と、前記第二構造体の下端を地盤に連結する第二基礎部と、前記第二構造体と前記第二基礎部との連結間に設けられた免震装置と、を備えることを特徴とする。   In order to achieve the above-described object, the tower-like structure of the present invention is configured to support the first structure by being arranged at least in a part around the first structure extending in the vertical direction and the first structure. A second base that connects the lower end of the first structure to the ground, a second base that connects the lower end of the second structure to the ground, the second structure, and the A seismic isolation device provided between the second base portion and the second base portion.

この塔状構造物によれば、第一構造体に対する地震外力による水平変位を第二構造体を介して免震装置により吸収することで、大きく設計された地震外力であっても第二構造体側で吸収することができる。しかも、第一構造体は下端のみ第一基礎部に固定されているため元より固有振動が比較的長周期であり、免震装置により第二構造体に対する地震外力による水平変位を許容することで、元の第一構造体の固有振動の抑制を緩和して固有振動の長周期化を図る。すなわち、耐震設計におけるレベル2規模の地震動よりもさらに大きなレベル3規模の地震動に対し、免震装置による長周期化対策によって地震応答を低減する。この結果、第一構造体や第二構造体を構成する主要部材を減少することができ、製造コストを低減することができる。また、従来、構造物全体(第一構造体+第二構造体)に対して免震を行うことに対し、本発明の塔状構造物は、第二構造体のみを免震することにより、同等の免震効果を得ることができ、かつ第一構造物に配管などが接続される場合に従来では必要とされるエキスパンションジョイントを必要としない。   According to this tower-like structure, the horizontal displacement due to the seismic external force with respect to the first structure is absorbed by the seismic isolation device via the second structure, so even if the seismic external force is greatly designed, the second structure side Can be absorbed. In addition, since the first structure is fixed to the first foundation only at the lower end, the natural vibrations are relatively long from the beginning, and the seismic isolation device allows horizontal displacement due to external forces on the second structure. The suppression of the natural vibration of the original first structure is eased to make the natural vibration longer. In other words, the seismic response is reduced by a countermeasure for extending the period with the seismic isolation device for the level 3 scale earthquake motion that is larger than the level 2 scale earthquake motion in the seismic design. As a result, the main members constituting the first structure and the second structure can be reduced, and the manufacturing cost can be reduced. In addition, conventionally, the tower-like structure of the present invention is isolated only from the second structure, while performing isolation from the entire structure (first structure + second structure). An equivalent seismic isolation effect can be obtained, and an expansion joint that is conventionally required when piping or the like is connected to the first structure is not required.

また、本発明の塔状構造物では、前記第二基礎部は、前記第二構造体の下端が固定された基礎躯体と、前記地盤に固定された基礎本体と、を含み、前記免震装置は、前記基礎躯体と前記基礎本体との間に設けられることを特徴とする。   Further, in the tower-like structure of the present invention, the second foundation part includes a foundation frame in which a lower end of the second structure is fixed, and a foundation body fixed to the ground, and the seismic isolation device Is provided between the foundation housing and the foundation body.

この塔状構造物によれば、地震外力による水平変位が第二構造体に生じた場合、当該第二構造体には鉛直方向上方への引き抜き力が加わるが、この引き抜き力は第二構造体の下端が固定された基礎躯体により抑えることができる。しかも、地震外力による水平変位は、基礎躯体と基礎本体との間に設けられた免震装置により吸収することができる。   According to this tower-like structure, when a horizontal displacement due to an earthquake external force occurs in the second structure, a pulling force is applied to the second structure in the vertical direction. It can be suppressed by the foundation frame to which the lower end of is fixed. Moreover, the horizontal displacement due to the seismic external force can be absorbed by the seismic isolation device provided between the foundation frame and the foundation body.

また、本発明の塔状構造物では、前記免震装置は、前記第二基礎部に対して前記第二構造体を水平方向に移動可能に支持する移動機構と、前記第二基礎部と前記第二構造体との間に復元力を作用させる復元力機構と、前記第二基礎部と前記第二構造体との間に減衰力を作用させる減衰力機構と、を含むことを特徴とする。   In the tower-like structure of the present invention, the seismic isolation device supports the second structure so that the second structure can be moved in the horizontal direction with respect to the second foundation, the second foundation, and the A restoring force mechanism for applying a restoring force between the second structure and a damping force mechanism for applying a damping force between the second base portion and the second structure. .

この塔状構造物によれば、第一構造体に対して地震外力による水平変位を吸収する効果を顕著に得ることができる。   According to this tower-like structure, the effect of absorbing the horizontal displacement due to the earthquake external force can be remarkably obtained with respect to the first structure.

また、本発明の塔状構造物では、前記免震装置は、前記第二基礎部に対して前記第二構造体を水平方向に移動可能に支持し、かつ前記第二基礎部と前記第二構造体との間に復元力を作用させる支承と、前記第二基礎部と前記第二構造体との間に減衰力を作用させる減衰力機構と、を含むことを特徴とする。   In the tower-like structure of the present invention, the seismic isolation device supports the second structure so as to be movable in the horizontal direction with respect to the second base portion, and the second base portion and the second base portion. It includes a bearing for applying a restoring force between the structure and a damping force mechanism for applying a damping force between the second base portion and the second structure.

この塔状構造物によれば、支承により第二基礎部に対して第二構造体を水平方向に移動可能に支持する機能と、第二基礎部と第二構造体との間に復元力を作用させる機能とを兼ねることができ、免震装置の小型化を図ることができ、かつ免震装置の設置範囲を縮小することができる。   According to this tower-like structure, the function of supporting the second structure so as to be movable in the horizontal direction with respect to the second foundation by support and the restoring force between the second foundation and the second structure are provided. The seismic isolation device can be downsized and the installation range of the seismic isolation device can be reduced.

また、本発明の塔状構造物では、前記免震装置は、前記第二基礎部に対して前記第二構造体を水平方向に移動可能に支持し、かつ前記第二基礎部と前記第二構造体との間に復元力を作用させつつ、前記第二基礎部と前記第二構造体との間に減衰力を作用させる減衰ゴム支承を含むことを特徴とする。   In the tower-like structure of the present invention, the seismic isolation device supports the second structure so as to be movable in the horizontal direction with respect to the second base portion, and the second base portion and the second base portion. A damping rubber bearing is provided that applies a damping force between the second base portion and the second structure while applying a restoring force to the structure.

この塔状構造物によれば、減衰ゴム支承により第二基礎部に対して第二構造体を水平方向に移動可能に支持する機能と、第二基礎部と第二構造体との間に復元力を作用させる機能と、第二基礎部と第二構造体との間に減衰力を作用させる機能とを兼ねることができ、免震装置の小型化を図ることができ、かつ免震装置の設置範囲を縮小することができる。   According to this tower-like structure, the function of supporting the second structure so as to be movable in the horizontal direction with respect to the second foundation by the damping rubber support, and the restoration between the second foundation and the second structure. The function of applying a force and the function of applying a damping force between the second foundation and the second structure can be achieved, and the seismic isolation device can be reduced in size, and The installation range can be reduced.

また、本発明の塔状構造物では、前記第一構造体と前記第二構造体との間に設けられた制震装置をさらに備えることを特徴とする。   Moreover, the tower-like structure according to the present invention further includes a vibration control device provided between the first structure and the second structure.

この塔状構造物によれば、上述した効果に加えて第一構造体の過大な振動を抑制することができる。   According to this tower-like structure, in addition to the effects described above, excessive vibration of the first structure can be suppressed.

本発明によれば、大きな地震外力を吸収することができる。   According to the present invention, a large earthquake external force can be absorbed.

図1は、本発明の実施形態に係る塔状構造物の側面図である。FIG. 1 is a side view of a tower-like structure according to an embodiment of the present invention. 図2は、本発明の実施形態に係る塔状構造物の平面図である。FIG. 2 is a plan view of the tower-like structure according to the embodiment of the present invention. 図3は、本発明の実施形態に係る塔状構造物における免震装置の他の例の横断面拡大図である。FIG. 3 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. 図4は、本発明の実施形態に係る塔状構造物における免震装置の他の例の平面視拡大図である。FIG. 4 is an enlarged plan view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. 図5は、本発明の実施形態に係る塔状構造物における免震装置の他の例の横断面拡大図である。FIG. 5 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. 図6は、本発明の実施形態に係る塔状構造物における免震装置の他の例の横断面拡大図である。FIG. 6 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. 図7は、本発明の実施形態に係る塔状構造物における免震装置の他の例の横断面拡大図である。FIG. 7 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. 図8は、本発明の実施形態に係る塔状構造物の他の例の側面図である。FIG. 8 is a side view of another example of the tower-like structure according to the embodiment of the present invention.

以下に、本発明に係る実施形態を図面に基づいて詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。また、下記実施形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。   Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

図1は、本実施形態に係る塔状構造物の側面図である。図2は、本実施形態に係る塔状構造物の平面図である。   FIG. 1 is a side view of a tower-like structure according to this embodiment. FIG. 2 is a plan view of the tower-like structure according to the present embodiment.

図1において、本実施形態の塔状構造物1は、鉛直方向に延びる第一構造体2と、第一構造体2の周囲の少なくとも一部に配置されて第一構造体2を支持する第二構造体3と、を備えている。   In FIG. 1, a tower-like structure 1 of the present embodiment includes a first structure 2 that extends in the vertical direction, and a first structure 2 that is disposed at least partially around the first structure 2 and supports the first structure 2. Two structures 3.

第一構造体2は、例えば筒身を含む。第二構造体3は、例えば鉄塔を含む。以下の説明において、第一構造体2を適宜、筒身2と称し、第二構造体3を適宜、鉄塔3と称する。なお、第一構造体2は、例えば柱状の構造体でもよいし、居住可能な塔状の構造体でもよい。   The first structure 2 includes, for example, a cylinder. The second structure 3 includes, for example, a steel tower. In the following description, the first structure 2 is appropriately referred to as a cylinder 2, and the second structure 3 is appropriately referred to as a steel tower 3. The first structure 2 may be, for example, a columnar structure or a towerable structure that can be inhabited.

筒身2は、その下端が第一基礎部4に固定される。第一基礎部4は、筒身2の下端を地盤Gに連結するもので、コンクリートにより構成され地盤Gに打ち込まれた杭4aを含む。   The lower end of the tube body 2 is fixed to the first base portion 4. The first foundation portion 4 connects the lower end of the tubular body 2 to the ground G, and includes a pile 4 a made of concrete and driven into the ground G.

筒身2は、第一基礎部4から鉛直方向に立ち上がるように設けられる。筒身2は、鉛直方向に延びるように長い。筒身2は、例えば煙突筒身である。筒身2は、下端部に排煙ダクト5が接続され、当該排煙ダクト5から送られるガスを内部に通して上端部から排出する。なお、筒身2は、単数の部材でもよいし、複数の部材を含んでもよい。   The tube body 2 is provided so as to rise from the first base portion 4 in the vertical direction. The cylinder body 2 is long so as to extend in the vertical direction. The cylinder 2 is, for example, a chimney cylinder. The cylinder 2 has a smoke exhaust duct 5 connected to a lower end portion thereof, and discharges gas sent from the smoke exhaust duct 5 from the upper end portion through the inside. The cylinder 2 may be a single member or may include a plurality of members.

鉄塔3は、その下端が第二基礎部6に固定される。第二基礎部6は、鉄塔3の下端を地盤Gに連結するもので、主にコンクリートにより構成され地盤Gに打ち込まれた杭6aを含む。第二基礎部6の詳細な構成については後述する。   The lower end of the steel tower 3 is fixed to the second foundation part 6. The 2nd foundation part 6 connects the lower end of the steel tower 3 to the ground G, and includes the pile 6a comprised mainly by concrete and driven into the ground G. The detailed configuration of the second base portion 6 will be described later.

鉄塔3は、第二基礎部6から鉛直方向に立ち上がるように設けられる。鉄塔3は、筒身2の周囲に配置される。本実施形態において、鉄塔3は、トラスト構造を含む。鉄塔3は、筒身2に隣り合う複数の縦材3aと、縦材3a間に接続される横材3bと、縦材3aと横材3bとの少なくとも一方に接続される斜材3cとを含む。   The steel tower 3 is provided so as to rise in the vertical direction from the second base portion 6. The steel tower 3 is arranged around the cylindrical body 2. In the present embodiment, the steel tower 3 includes a trust structure. The steel tower 3 includes a plurality of vertical members 3a adjacent to the cylindrical body 2, a horizontal member 3b connected between the vertical members 3a, and a diagonal member 3c connected to at least one of the vertical member 3a and the horizontal member 3b. Including.

縦材3aは、筒身2の周囲に複数配置される。縦材3aは、鉛直方向に延びるように長い。本実施形態において、縦材3aは、筒身2を中心として筒身2の周囲に4本配置される。縦材3aは、その下端が鉄塔3の下端となり第二基礎部6に固定される。縦材3aは、鋼管を含む。なお、縦材3aが、形鋼を含んでもよい。   A plurality of vertical members 3 a are arranged around the cylindrical body 2. The vertical member 3a is long so as to extend in the vertical direction. In the present embodiment, four vertical members 3 a are arranged around the cylinder 2 with the cylinder 2 as the center. The lower end of the vertical member 3 a becomes the lower end of the steel tower 3 and is fixed to the second foundation portion 6. The vertical member 3a includes a steel pipe. In addition, the vertical member 3a may include a shape steel.

横材3bは、水平方向において隣り合う縦材3aと縦材3aとを結ぶように配置される。横材3bは、水平方向と平行となるように配置される。水平方向において、横材3bは、筒身2を囲むように配置される。横材3bは、形鋼を含む。なお、横材3bが、鋼管を含んでもよい。また、横材3bは、鉛直方向に複数配置され、本実施形態において、鉛直方向に7つ(7段)配置される。   The cross member 3b is disposed so as to connect the vertical members 3a and 3a adjacent to each other in the horizontal direction. The cross member 3b is disposed so as to be parallel to the horizontal direction. In the horizontal direction, the cross member 3b is disposed so as to surround the cylindrical body 2. The cross member 3b includes a shape steel. The cross member 3b may include a steel pipe. A plurality of cross members 3b are arranged in the vertical direction, and in the present embodiment, seven (seven steps) are arranged in the vertical direction.

斜材3cは、縦材3aや横材3bに対して傾斜して配置される。斜材3cは、鉛直方向(上下方向)に隣り合う縦材3aと横材3bとを連結するように配置される。斜材3cは、他の斜材3cと縦材3aまたは横材3bとを連結するように配置される。斜材3cは、水平方向において隣り合う縦材3aと縦材3aとを結ぶように配置されてもよい。斜材3cは、鉛直方向(上下方向)に隣り合う横材3bと横材3bとを結ぶように配置されてもよい。斜材3cは、形鋼を含む。なお、斜材3cが、鋼管を含んでもよい。   The diagonal member 3c is disposed to be inclined with respect to the vertical member 3a and the horizontal member 3b. The diagonal member 3c is disposed so as to connect the vertical member 3a and the horizontal member 3b adjacent to each other in the vertical direction (vertical direction). The diagonal member 3c is arranged so as to connect the other diagonal member 3c and the vertical member 3a or the horizontal member 3b. The diagonal material 3c may be arranged so as to connect the vertical material 3a and the vertical material 3a adjacent in the horizontal direction. The diagonal member 3c may be disposed so as to connect the cross member 3b and the cross member 3b adjacent in the vertical direction (vertical direction). The diagonal 3c includes a section steel. The diagonal member 3c may include a steel pipe.

このように構成された鉄塔3は、筒身2の側部の少なくとも一部に連結され、筒身2の水平方向への変位を抑えるように支持する。鉄塔3と筒身2との連結は、例えば、横材3bが設けられた水平方向において縦材3aや横材3bと筒身2の側部とを水平方向に延びる形鋼や鋼管により連結する。   The steel tower 3 configured in this manner is connected to at least a part of the side portion of the cylinder 2 and supports the cylinder 2 so as to suppress displacement in the horizontal direction. The steel tower 3 and the tube body 2 are connected by, for example, connecting the vertical member 3a or the cross member 3b and the side part of the tube body 2 in the horizontal direction in which the cross member 3b is provided by a shape steel or a steel pipe extending in the horizontal direction. .

上述した塔状構造物1において、第二構造体である鉄塔3と第二基礎部6との連結間に免震装置7が設けられる。   In the tower-like structure 1 described above, the seismic isolation device 7 is provided between the steel tower 3 that is the second structure and the second base portion 6.

ここで、第二基礎部6は、図1および図2に示すように、基礎本体6Aと、基礎躯体6Bと、を含む。   Here, as shown in FIGS. 1 and 2, the second foundation portion 6 includes a foundation body 6 </ b> A and a foundation housing 6 </ b> B.

基礎本体6Aは、コンクリートで構成されており、水平方向に配置された底盤6Aaと、底盤6Aaの周縁にて鉛直方向に立てて設けられた立壁6Abと、が一体に構成されている。本実施形態において、底盤6Aaは、筒身2を地盤Gに固定する第一基礎部4を囲むように中央が抜けた矩形状に形成される。そして、立壁6Abは、底盤6Aaの内側の全周縁および外側の全周縁に連続し鉛直上方に向けて設けられる。従って、基礎本体6Aは、底盤6Aaおよび立壁6Abにより、中央が抜けて周囲が上方に開放した箱状に形成される。そして、基礎本体6Aは、立壁6Abの上端である開放端が地盤Gの表面(地面)に向けて地盤Gに埋められ、底盤6Aaの下面に杭6aが設けられて地盤Gに固定される。   The base body 6A is made of concrete, and a bottom board 6Aa arranged in the horizontal direction and a standing wall 6Ab provided upright in the vertical direction at the periphery of the bottom board 6Aa are integrally formed. In the present embodiment, the bottom plate 6Aa is formed in a rectangular shape with the center removed so as to surround the first base portion 4 that fixes the tubular body 2 to the ground G. The upright wall 6Ab is provided continuously upward in the vertical direction and continuously to the entire inner periphery and the outer periphery of the bottom board 6Aa. Therefore, the base body 6A is formed in a box shape with the center coming off and the periphery opened upward by the bottom board 6Aa and the standing wall 6Ab. The foundation main body 6A is fixed to the ground G with the open end, which is the upper end of the standing wall 6Ab, buried in the ground G toward the surface (ground) of the ground G, and the pile 6a is provided on the lower surface of the bottom 6Aa.

基礎躯体6Bは、コンクリートでブロック状に構成されており、基礎本体6Aの箱状の内部に配置される。基礎躯体6Bは、鉄塔3の各縦材3aに対応して複数設けられており、それぞれ縦材3aの下端が固定される。本実施形態では、縦材3aが筒身2を中心として筒身2の周囲に4本配置されているため、基礎躯体6Bは、第一基礎部4を中心として第一基礎部4の周囲で水平方向に4つ配置されている。また、基礎躯体6Bは、水平方向で隣り合う基礎躯体6Bと基礎躯体6Bとが連結材6Cで連結される。連結材6Cは、基礎本体6Aの箱状の内部において水平方向で第一基礎部4を囲むように配置される。連結材6Cは、形鋼や鋼管を含む。   The foundation frame 6B is made of concrete and formed into a block shape, and is disposed inside the box-like body of the foundation body 6A. A plurality of foundation housings 6B are provided corresponding to the respective vertical members 3a of the steel tower 3, and the lower ends of the vertical members 3a are respectively fixed. In the present embodiment, four vertical members 3 a are arranged around the cylinder 2 around the cylinder 2, so that the foundation housing 6 </ b> B is around the first foundation 4 around the first foundation 4. Four are arranged in the horizontal direction. In addition, in the foundation chassis 6B, the foundation chassis 6B and the foundation chassis 6B adjacent in the horizontal direction are connected by a connecting material 6C. The connecting member 6C is arranged so as to surround the first base portion 4 in the horizontal direction in the box-shaped inside of the base body 6A. The connecting material 6C includes a shape steel and a steel pipe.

免震装置7は、第二基礎部6における基礎本体6Aと各基礎躯体6Bとの間に設けられる。免震装置7は、基礎本体6Aに対して基礎躯体6B(鉄塔3)を水平方向に移動可能に支持する移動機構7Aと、基礎本体6Aと基礎躯体6B(鉄塔3)との間に復元力を作用させる復元力機構7Bと、基礎本体6Aと基礎躯体6B(鉄塔3)との間に減衰力を作用させる減衰力機構7Cと、を含む。   The seismic isolation device 7 is provided between the foundation main body 6A and each foundation housing 6B in the second foundation portion 6. The seismic isolation device 7 has a restoring force between the base body 6A and the base housing 6B (steel tower 3), and a moving mechanism 7A that supports the base body 6B (steel tower 3) so as to move in the horizontal direction with respect to the base body 6A And a damping force mechanism 7C that applies a damping force between the foundation main body 6A and the foundation frame 6B (steel tower 3).

移動機構7Aは、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面とが対向する間に設けられており、基礎躯体6B(鉄塔3)の鉛直方向の荷重を受け、かつ基礎躯体6B(鉄塔3)を水平方向に移動可能に支持する。移動機構7Aは、例えば、図2に示すように、基礎本体6Aの底盤6Aaの上面に固定されて水平方向に長く延びる第一レール部材7Aaと、基礎躯体6Bの下面に固定されて水平方向で第一レール部材7Aaに直交して長く延びる第二レール部材7Abと、が相互の延在方向にスライド可能に設けられる、いわゆる、すべり支承が適用される。なお、移動機構7Aは、図2に示す以外の構成のすべり支承や転がり支承を含む。また、移動機構7Aは、基礎躯体6B側に生じる引き抜き力を基礎本体6A側で受けるように構成され、例えば、第一レール部材7Aaと第二レール部材7Abとが相互の鉛直方向への移動を規制されている。   The moving mechanism 7A is provided while the bottom plate 6Aa of the foundation main body 6A and the lower surface of the foundation chassis 6B are opposed to each other, receives the load in the vertical direction of the foundation chassis 6B (steel tower 3), and is provided with the foundation chassis 6B (iron tower 3). ) Is movably supported in the horizontal direction. For example, as shown in FIG. 2, the moving mechanism 7A is fixed to the upper surface of the bottom plate 6Aa of the base body 6A and extends in the horizontal direction, and is fixed to the lower surface of the base housing 6B in the horizontal direction. A so-called sliding bearing is applied in which a second rail member 7Ab extending long perpendicularly to the first rail member 7Aa is slidably provided in the extending direction. The moving mechanism 7A includes a sliding bearing and a rolling bearing having a configuration other than that shown in FIG. In addition, the moving mechanism 7A is configured to receive a pulling force generated on the foundation housing 6B side on the foundation body 6A side. For example, the first rail member 7Aa and the second rail member 7Ab move in the vertical direction. It is regulated.

復元力機構7Bは、基礎本体6Aと基礎躯体6B(鉄塔3)とを基準位置に戻す復元力を作用させる。復元力機構7Bは、例えば、図1および図2に示すように、基礎本体6Aの立壁6Abと基礎躯体6Bの側面とが対向する間を接続するバネ部材が適用される。このバネ部材は、各基礎躯体6Bに対応して設けられ、水平方向で直交する少なくとも2方向に弾性力(圧縮力または引張力)を生じるように配置されている。そして、バネ部材は、それぞれの弾性力(圧縮力または引張力)が釣り合って基礎本体6Aと基礎躯体6B(鉄塔3)との相対変位(移動機構7Aによる移動の変位)が静止した位置を基準位置とし、移動機構7Aによる変位が生じた場合、この変位を弾性力により基準位置に戻す復元力を作用させる。なお、バネ部材は、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面とが対向する間で、基礎本体6A側と基礎躯体6B側とに水平方向に対向して設けられた各固定部材6D(図3参照)の間を接続してもよい。   The restoring force mechanism 7B applies a restoring force that returns the foundation body 6A and the foundation frame 6B (steel tower 3) to the reference position. As shown in FIGS. 1 and 2, for example, a spring member that connects the standing wall 6Ab of the base body 6A and the side surface of the base housing 6B is applied to the restoring force mechanism 7B. This spring member is provided corresponding to each foundation housing 6B, and is arranged so as to generate elastic force (compression force or tensile force) in at least two directions orthogonal to each other in the horizontal direction. The spring member is based on the position where the relative displacement (displacement of movement by the moving mechanism 7A) between the foundation body 6A and the foundation frame 6B (steel tower 3) is stationary due to the balance of the respective elastic forces (compression force or tensile force). When the displacement is caused by the moving mechanism 7A, a restoring force is applied to return the displacement to the reference position by an elastic force. The spring member is fixed to each of the fixing members 6D (in the horizontal direction facing the base body 6A and the base housing 6B) while the bottom plate 6Aa of the base body 6A and the bottom surface of the base housing 6B are opposed to each other. (See FIG. 3).

減衰力機構7Cは、基礎本体6Aと基礎躯体6B(鉄塔3)との相対変位(移動機構7Aによる移動の変位)を減衰させる減衰力を作用させる。減衰力機構7Cは、例えば、図1および図2に示すように、基礎本体6Aの立壁6Abと基礎躯体6Bの側面とが対向する間を接続するダンパが適用される。図1および図2に示すダンパは、オイルダンパーや粘性ダンパが適用される。このダンパは、各基礎躯体6Bに対応して設けられ、水平方向で直交する少なくとも2方向に減衰力を生じるように配置されている。   The damping force mechanism 7C applies a damping force that attenuates the relative displacement (displacement of movement by the moving mechanism 7A) between the foundation main body 6A and the foundation frame 6B (steel tower 3). For example, as shown in FIGS. 1 and 2, the damping force mechanism 7 </ b> C is a damper that connects the standing wall 6 </ b> Ab of the foundation body 6 </ b> A and the side surface of the foundation housing 6 </ b> B. An oil damper or a viscous damper is applied to the damper shown in FIGS. This damper is provided corresponding to each foundation housing 6B, and is disposed so as to generate a damping force in at least two directions orthogonal to each other in the horizontal direction.

図3および図5〜図7は、本実施形態に係る塔状構造物における免震装置の他の例の横断面拡大図である。図4は、本実施形態に係る塔状構造物における免震装置の他の例の平面視拡大図である。   3 and 5 to 7 are enlarged cross-sectional views of other examples of the seismic isolation device in the tower structure according to the present embodiment. FIG. 4 is an enlarged plan view of another example of the seismic isolation device in the tower structure according to the present embodiment.

図3〜図7は、免震装置7が基礎本体6Aの底盤6Aaと基礎躯体6Bの下面との間に配置された例を示している。   3-7 has shown the example by which the seismic isolation apparatus 7 was arrange | positioned between the bottom board 6Aa of 6 A of foundation main bodies, and the lower surface of the foundation housing 6B.

図3〜図6に示す免震装置7は、支承7Dと、減衰力機構(ダンパ)7Cと、を含む。   The seismic isolation device 7 shown in FIGS. 3 to 6 includes a support 7D and a damping force mechanism (damper) 7C.

図3および図5に示す支承7Dは、上述した移動機構7Aおよび復元力機構7Bを兼ねたもので、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面とが対向する間で、水平方向に設けたゴム板と鋼板とを交互に鉛直方向に積層した積層ゴム支承である。   The bearing 7D shown in FIGS. 3 and 5 also serves as the moving mechanism 7A and the restoring force mechanism 7B described above, and is provided in the horizontal direction while the bottom panel 6Aa of the basic body 6A and the lower surface of the basic casing 6B face each other. This is a laminated rubber bearing in which rubber plates and steel plates are alternately laminated in the vertical direction.

図6に示す支承7Dは、上述した移動機構7Aおよび復元力機構7Bを兼ねたもので、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面とが対向する間で、鉛直方向に対向する各鋼板の凹状の曲面7Daの間に鋼球7Dbを挟み込んだ曲面式の球転がり支承である。   A bearing 7D shown in FIG. 6 serves as both the moving mechanism 7A and the restoring force mechanism 7B described above, and each steel plate facing in the vertical direction while the bottom panel 6Aa of the foundation body 6A and the lower surface of the foundation casing 6B are opposed to each other. This is a curved surface type ball rolling bearing in which a steel ball 7Db is sandwiched between the concave curved surface 7Da.

支承7Dは、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面との間の複数箇所(図4では4箇所)に配置され、鉄塔3の荷重を均等に受けるように縦材3aの下端の直下位置を囲むように配置されていることが好ましい。   The bearings 7D are arranged at a plurality of locations (four locations in FIG. 4) between the bottom plate 6Aa of the foundation main body 6A and the lower surface of the foundation casing 6B, and directly below the lower ends of the vertical members 3a so as to receive the load of the steel tower 3 evenly. It is preferable to arrange so as to surround the position.

図3、図4、図6に示す減衰力機構(ダンパ)7Cは、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面とが対向する間で、基礎本体6A側と基礎躯体6B側とに水平方向に対向して設けられた各固定部材6Dの間を接続して設けられている。図3、図4、図6に示す減衰力機構(ダンパ)7Cは、オイルダンパーや粘性ダンパが適用される。このダンパは、水平方向で直交する少なくとも2方向に減衰力を生じるように配置されている。   The damping force mechanism (damper) 7C shown in FIGS. 3, 4, and 6 is horizontal to the base body 6A side and the base housing 6B side while the bottom plate 6Aa of the base body 6A and the lower surface of the base housing 6B face each other. The fixing members 6D provided to face each other are connected to each other. An oil damper or a viscous damper is applied to the damping force mechanism (damper) 7C shown in FIGS. The damper is disposed so as to generate a damping force in at least two directions orthogonal to each other in the horizontal direction.

図5に示す減衰力機構(ダンパ)7Cは、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面とが対向する間で、基礎本体6A側と基礎躯体6B側とを予め湾曲された鋼棒を介在して接続して設けられた鋼棒ダンパである。また、図には明示しないが、減衰力機構(ダンパ)7Cは、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面とが対向する間で、基礎本体6A側と基礎躯体6B側とを予め湾曲された鉛柱を介在して接続して設けられた鉛ダンパであってもよい。これら鋼棒ダンパおよび鉛ダンパは、塑性変形により減衰力を生じる。鋼棒ダンパおよび鉛ダンパは、図6の曲面式の球転がり支承と併用することを含む。   The damping force mechanism (damper) 7C shown in FIG. 5 is a steel rod that is curved in advance on the base body 6A side and the base housing 6B side while the bottom plate 6Aa of the base body 6A and the lower surface of the base housing 6B face each other. It is a steel bar damper provided by being interposed and connected. Although not clearly shown in the drawing, the damping force mechanism (damper) 7C is curved in advance between the base body 6A side and the base housing 6B side while the bottom plate 6Aa of the base body 6A and the lower surface of the base housing 6B face each other. It may be a lead damper provided by being connected via a lead column. These steel bar dampers and lead dampers generate a damping force by plastic deformation. The steel bar damper and the lead damper include the combined use with the curved ball rolling bearing of FIG.

図7に示す免震装置7は、減衰ゴム支承7Eを含む。減衰ゴム支承7Eは、移動機構7A、復元力機構7Bおよび減衰力機構7Cを兼ねたもので、基礎本体6A側と基礎躯体6B側とを接続して設けられている。減衰ゴム支承7Eは、例えば、水平方向に設けたゴム板を鉛直方向に積層した積層ゴムに、鉛ダンパが挿入された構成がある。減衰ゴム支承7Eは、基礎本体6Aの底盤6Aaと基礎躯体6Bの下面との間の複数箇所(例えば、図4で示す支承7Dと同様に4箇所)に配置され、鉄塔3の荷重を均等に受けるように縦材3aの下端の直下位置を囲むように配置されていることが好ましい。   The seismic isolation device 7 shown in FIG. 7 includes a damping rubber bearing 7E. The damping rubber bearing 7E serves as the moving mechanism 7A, the restoring force mechanism 7B, and the damping force mechanism 7C, and is provided by connecting the base body 6A side and the base housing 6B side. The damping rubber support 7E has, for example, a configuration in which a lead damper is inserted into a laminated rubber in which rubber plates provided in the horizontal direction are laminated in the vertical direction. The damping rubber bearings 7E are arranged at a plurality of locations (for example, four locations as in the bearing 7D shown in FIG. 4) between the bottom plate 6Aa of the foundation main body 6A and the lower surface of the foundation casing 6B, and the load on the tower 3 is evenly distributed. It is preferable to arrange so as to surround a position directly below the lower end of the longitudinal member 3a so as to receive.

このように、本実施形態の塔状構造物1は、鉛直方向に延びる第一構造体としての筒身2と、筒身2の周囲の少なくとも一部に配置されて筒身2を支持する第二構造体としての鉄塔3と、筒身2の下端を地盤に連結する第一基礎部4と、鉄塔3の下端を地盤に連結する第二基礎部6と、鉄塔3と第二基礎部6との連結間に設けられた免震装置7と、を備える。   As described above, the tower-like structure 1 of the present embodiment is a cylinder 2 as a first structure extending in the vertical direction, and a second structure that is disposed at least partially around the cylinder 2 and supports the cylinder 2. The steel tower 3 as a two-structure body, the first foundation part 4 connecting the lower end of the cylinder 2 to the ground, the second foundation part 6 connecting the lower end of the tower 3 to the ground, the tower 3 and the second foundation part 6 And a seismic isolation device 7 provided between the two.

この塔状構造物1によれば、筒身2に対する地震外力による水平変位を鉄塔3を介して免震装置7により吸収することで、大きく設計された地震外力であっても鉄塔3側で吸収することができる。しかも、筒身2は下端のみ第一基礎部4に固定されているため元より固有振動が比較的長周期であり、免震装置7により鉄塔3に対する地震外力による水平変位を許容することで、元の筒身2の固有振動の抑制を緩和して固有振動の長周期化を図る。すなわち、耐震設計におけるレベル2規模の地震動よりもさらに大きなレベル3規模の地震動に対し、免震装置による長周期化対策によって地震応答を低減する。なお、免震装置7を設けずに第二基礎部6に鉄塔3の下端を固定すると、筒身2の固有振動が短周期化してしまう。この結果、筒身2や鉄塔3を構成する主要部材を減少することができる。具体的には、例えば、筒身2の壁厚を減肉化したり、鉄塔3の縦材3a、横材3b、斜材3cを細くしたりすることが可能になり、各基礎部4,6を小型化したり、製造コストを低減することができる。また、従来、構造物全体(筒身2+鉄塔3)に対して免震を行うことに対し、本発明の塔状構造物は、鉄塔3のみを免震することにより、同等の免震効果を得ることができ、かつ筒身2に配管などが接続される場合に従来では必要とされるエキスパンションジョイントを必要としない。   According to this tower-like structure 1, the horizontal displacement due to the seismic external force with respect to the barrel 2 is absorbed by the seismic isolation device 7 through the steel tower 3, so that even a greatly designed earthquake external force is absorbed on the steel tower 3 side. can do. Moreover, since the tube body 2 is fixed to the first base portion 4 only at the lower end, the natural vibration is relatively long from the beginning, and the seismic isolation device 7 allows horizontal displacement due to the seismic external force on the tower 3. The suppression of the natural vibration of the original tube body 2 is eased to make the natural vibration longer. In other words, the seismic response is reduced by a countermeasure for extending the period with the seismic isolation device for the level 3 scale earthquake motion that is larger than the level 2 scale earthquake motion in the seismic design. In addition, if the lower end of the steel tower 3 is fixed to the 2nd foundation part 6 without providing the seismic isolation apparatus 7, the natural vibration of the cylinder 2 will shorten a period. As a result, the main members constituting the tube body 2 and the steel tower 3 can be reduced. Specifically, for example, the wall thickness of the cylindrical body 2 can be reduced, and the vertical members 3a, horizontal members 3b, and diagonal members 3c of the steel tower 3 can be thinned. Can be reduced in size and the manufacturing cost can be reduced. Moreover, conventionally, the tower-like structure of the present invention has an equivalent seismic isolation effect by isolating only the tower 3 while performing the base isolation for the entire structure (cylinder 2 + steel tower 3). An expansion joint that is conventionally required when piping or the like is connected to the tube body 2 can be obtained.

また、本実施形態の塔状構造物1では、第二基礎部6は、鉄塔3の下端が固定された基礎躯体6Bと、地盤Gに固定された基礎本体6Aと、を含み、免震装置7は、基礎躯体6Bと基礎本体6Aとの間に設けられることが好ましい。   Moreover, in the tower-like structure 1 of the present embodiment, the second foundation portion 6 includes a foundation frame 6B to which the lower end of the steel tower 3 is fixed, and a foundation body 6A that is fixed to the ground G. 7 is preferably provided between the foundation housing 6B and the foundation body 6A.

この塔状構造物1によれば、地震外力による水平変位が鉄塔3に生じた場合、当該鉄塔3には鉛直方向上方への引き抜き力が加わるが、この引き抜き力は鉄塔3の下端が固定された基礎躯体6Bにより抑えることができる。しかも、地震外力による水平変位は、基礎躯体6Bと基礎本体6Aとの間に設けられた免震装置7により吸収することができる。   According to this tower-like structure 1, when a horizontal displacement due to an earthquake external force occurs in the steel tower 3, a pulling force is applied to the steel tower 3 in the vertical direction, but this pulling force fixes the lower end of the steel tower 3. This can be suppressed by the foundation frame 6B. Moreover, the horizontal displacement due to the seismic external force can be absorbed by the seismic isolation device 7 provided between the foundation housing 6B and the foundation body 6A.

また、本実施形態の塔状構造物1では、免震装置7は、第二基礎部6に対して鉄塔3を水平方向に移動可能に支持する移動機構7Aと、第二基礎部6と鉄塔3との間に復元力を作用させる復元力機構7Bと、第二基礎部6と鉄塔3との間に減衰力を作用させる減衰力機構7Cと、を含むことが好ましい。   Moreover, in the tower-like structure 1 of this embodiment, the seismic isolation device 7 includes the moving mechanism 7A that supports the steel tower 3 so as to be movable in the horizontal direction with respect to the second base part 6, and the second base part 6 and the steel tower. It is preferable to include a restoring force mechanism 7 </ b> B that applies a restoring force to 3, and a damping force mechanism 7 </ b> C that applies a damping force between the second foundation portion 6 and the steel tower 3.

この塔状構造物1によれば、筒身2に対して地震外力による水平変位を吸収する効果を顕著に得ることができる。   According to the tower-like structure 1, the effect of absorbing the horizontal displacement due to the earthquake external force with respect to the cylindrical body 2 can be remarkably obtained.

また、本実施形態の塔状構造物1では、免震装置7は、第二基礎部6に対して鉄塔3を水平方向に移動可能に支持し、かつ第二基礎部6と鉄塔3との間に復元力を作用させる支承7Dと、第二基礎部6と鉄塔3との間に減衰力を作用させる減衰力機構7Cと、を含むことが好ましい。   Moreover, in the tower-like structure 1 of the present embodiment, the seismic isolation device 7 supports the steel tower 3 so as to be movable in the horizontal direction with respect to the second base part 6, and the second base part 6 and the steel tower 3. It is preferable to include a support 7 </ b> D that applies a restoring force therebetween and a damping force mechanism 7 </ b> C that applies a damping force between the second foundation portion 6 and the steel tower 3.

この塔状構造物1によれば、支承7Dにより第二基礎部6に対して鉄塔3を水平方向に移動可能に支持する機能と、第二基礎部6と鉄塔3との間に復元力を作用させる機能とを兼ねることができ、免震装置7の小型化を図ることができ、かつ免震装置7の設置範囲を縮小することができる。   According to this tower-like structure 1, the function of supporting the steel tower 3 so as to be movable in the horizontal direction with respect to the second base portion 6 by the support 7 </ b> D, and a restoring force between the second base portion 6 and the steel tower 3 are provided. The seismic isolation device 7 can be miniaturized and the installation range of the seismic isolation device 7 can be reduced.

また、本実施形態の塔状構造物1では、免震装置7は、第二基礎部6に対し鉄塔3を水平方向に移動可能に支持し、かつ第二基礎部6と鉄塔3との間に復元力を作用させつつ、第二基礎部6と鉄塔3との間に減衰力を作用させる減衰ゴム支承7Eを含むことが好ましい。   Moreover, in the tower-like structure 1 of this embodiment, the seismic isolation device 7 supports the steel tower 3 so as to be movable in the horizontal direction with respect to the second foundation part 6, and between the second foundation part 6 and the steel tower 3. It is preferable to include a damping rubber bearing 7E that applies a damping force between the second base portion 6 and the steel tower 3 while applying a restoring force to the steel tower 3.

この塔状構造物1によれば、減衰ゴム支承7Eにより第二基礎部6に対して鉄塔3を水平方向に移動可能に支持する機能と、第二基礎部6と鉄塔3との間に復元力を作用させる機能と、第二基礎部6と鉄塔3との間に減衰力を作用させる機能とを兼ねることができ、免震装置7の小型化を図ることができ、かつ免震装置7の設置範囲を縮小することができる。   According to this tower-like structure 1, the function of supporting the steel tower 3 so as to be movable in the horizontal direction with respect to the second base part 6 by the damping rubber support 7 </ b> E, and the restoration between the second base part 6 and the steel tower 3. The function of applying a force and the function of applying a damping force between the second base portion 6 and the steel tower 3 can be achieved, the seismic isolation device 7 can be reduced in size, and the seismic isolation device 7 can be achieved. The installation range can be reduced.

図8は、本実施形態に係る塔状構造物の他の例の側面図である。図8に示すように、塔状構造物1は、第一構造体である筒身2と第二構造体である鉄塔3との間に設けられた制震装置8をさらに備えることが好ましい。   FIG. 8 is a side view of another example of the tower-like structure according to the present embodiment. As shown in FIG. 8, it is preferable that the tower-like structure 1 further includes a vibration control device 8 provided between the cylindrical body 2 as the first structure and the steel tower 3 as the second structure.

制震装置8は、上述した免震装置7と同様な構成であり、筒身2と鉄塔3とを水平方向に相対的に移動可能に支持する機能と、筒身2と鉄塔3との間に復元力を作用させる機能と、筒身2と鉄塔3との間に減衰力を作用させる機能とを有する。制震装置8は、制震性能を得るうえで、図8に示すように、鉄塔3の上端(頂部)に設けることが好ましいが、さらに鉛直方向の途中にも設けても制震性能を顕著に得るうえでよい。   The seismic control device 8 has the same configuration as the seismic isolation device 7 described above, and has a function of supporting the barrel 2 and the steel tower 3 so as to be relatively movable in the horizontal direction, and between the barrel 2 and the steel tower 3. And a function of applying a damping force between the tubular body 2 and the steel tower 3. As shown in FIG. 8, the seismic control device 8 is preferably provided at the upper end (top) of the steel tower 3 as shown in FIG. 8, but the seismic control performance is remarkable even when provided in the middle of the vertical direction. It is good in getting to.

この塔状構造物1によれば、上記効果に加えて筒身2の過大な振動を抑制することができる。   According to this tower-like structure 1, in addition to the above effects, excessive vibration of the cylinder 2 can be suppressed.

1 塔状構造物
2 筒身(第一構造体)
3 鉄塔(第二構造体)
4 第一基礎部
6 第二基礎部
6A 基礎本体
6B 基礎躯体
7 免震装置
7A 移動機構
7B 復元力機構
7C 減衰力機構
7D 支承
7E 減衰ゴム支承
8 制震装置
G 地盤
1 tower-like structure 2 cylinder (first structure)
3 Steel tower (second structure)
4 1st foundation part 6 2nd foundation part 6A foundation main body 6B foundation frame 7 Seismic isolation device 7A Movement mechanism 7B Restoring force mechanism 7C Damping force mechanism 7D Bearing 7E Damping rubber bearing 8 Damping device G Ground

Claims (6)

鉛直方向に延びる第一構造体と、
前記第一構造体の周囲の少なくとも一部に配置されて前記第一構造体を支持する第二構造体と、
前記第一構造体の下端を地盤に連結する第一基礎部と、
前記第二構造体の下端を地盤に連結する第二基礎部と、
前記第二構造体と前記第二基礎部との連結間に設けられた免震装置と、
を備えることを特徴とする塔状構造物。
A first structure extending in a vertical direction;
A second structure that is disposed on at least a part of the periphery of the first structure and supports the first structure;
A first foundation connecting the lower end of the first structure to the ground; and
A second base portion connecting the lower end of the second structure to the ground;
A seismic isolation device provided between the second structure and the second foundation,
A tower-like structure comprising:
前記第二基礎部は、前記第二構造体の下端が固定された基礎躯体と、前記地盤に固定された基礎本体と、を含み、前記免震装置は、前記基礎躯体と前記基礎本体との間に設けられることを特徴とする請求項1に記載の塔状構造物。   The second foundation part includes a foundation chassis in which a lower end of the second structure is fixed, and a foundation body fixed to the ground, and the seismic isolation device includes the foundation chassis and the foundation body. The tower-like structure according to claim 1, wherein the tower-like structure is provided between them. 前記免震装置は、前記第二基礎部に対して前記第二構造体を水平方向に移動可能に支持する移動機構と、前記第二基礎部と前記第二構造体との間に復元力を作用させる復元力機構と、前記第二基礎部と前記第二構造体との間に減衰力を作用させる減衰力機構と、を含むことを特徴とする請求項1または2に記載の塔状構造物。   The seismic isolation device provides a restoring force between the second base portion and the second structure, and a moving mechanism that supports the second structure so as to be movable in the horizontal direction with respect to the second base portion. The tower-like structure according to claim 1, comprising: a restoring force mechanism that acts; and a damping force mechanism that acts a damping force between the second base portion and the second structure. object. 前記免震装置は、前記第二基礎部に対して前記第二構造体を水平方向に移動可能に支持し、かつ前記第二基礎部と前記第二構造体との間に復元力を作用させる支承と、前記第二基礎部と前記第二構造体との間に減衰力を作用させる減衰力機構と、を含むことを特徴とする請求項1または2に記載の塔状構造物。   The seismic isolation device supports the second structure movably in the horizontal direction with respect to the second base portion, and causes a restoring force to act between the second base portion and the second structure body. The tower-like structure according to claim 1, further comprising a support and a damping force mechanism that applies a damping force between the second base portion and the second structure. 前記免震装置は、前記第二基礎部に対して前記第二構造体を水平方向に移動可能に支持し、かつ前記第二基礎部と前記第二構造体との間に復元力を作用させつつ、前記第二基礎部と前記第二構造体との間に減衰力を作用させる減衰ゴム支承を含むことを特徴とする請求項1または2に記載の塔状構造物。   The seismic isolation device supports the second structure so as to be movable in the horizontal direction with respect to the second foundation, and causes a restoring force to act between the second foundation and the second structure. However, the tower-like structure according to claim 1, further comprising a damping rubber bearing that applies a damping force between the second base portion and the second structure. 前記第一構造体と前記第二構造体との間に設けられた制震装置をさらに備えることを特徴とする請求項1〜5のいずれか1つに記載の塔状構造物。   The tower structure according to claim 1, further comprising a vibration control device provided between the first structure and the second structure.
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