JP3436344B2 - Potential lowering equipment for lightning strikes in base-isolated buildings - Google Patents
Potential lowering equipment for lightning strikes in base-isolated buildingsInfo
- Publication number
- JP3436344B2 JP3436344B2 JP07995198A JP7995198A JP3436344B2 JP 3436344 B2 JP3436344 B2 JP 3436344B2 JP 07995198 A JP07995198 A JP 07995198A JP 7995198 A JP7995198 A JP 7995198A JP 3436344 B2 JP3436344 B2 JP 3436344B2
- Authority
- JP
- Japan
- Prior art keywords
- lightning
- conductor
- building
- equipotential
- upper structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、上部構造体と基礎
部分とがアイソレータ（免震装置）によって電気的に絶
縁される鉄筋コンクリート造又は鉄骨鉄筋コンクリート
造の免震建物における落雷時の建物の電位低下設備に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reduction in the potential of a building in the case of a lightning strike in a reinforced concrete structure or a reinforced concrete structure of a reinforced concrete structure in which an upper structure and a foundation portion are electrically insulated by an isolator (isolation device). It is about equipment.
【０００２】[0002]
【従来の技術】一般的な免震建物は「ＪＩＳ Ａ ４２
０１」に準拠し、以下の２種類の方法により避雷針設備
の避雷導線を設けている。2. Description of the Related Art A general seismic isolated building is "JIS A 42
01 ”, the lightning conductor wire of the lightning rod installation is provided by the following two methods.
【０００３】１．避雷針設備の突針からの避雷導線をア
イソレータの位置に関係なく建物頂部から引き下げ導線
により接地極まで通す方法。
２．免震建物の上部構造体の主鉄筋あるいは鉄骨を引き
下げ導線として、建物頂部から上部構造体の底部まで避
雷導線を簡略化して設け、以降接地極まで配線を行う方
法。1. A method of pulling down the lightning conductor from the lightning rod of the lightning rod equipment from the top of the building to the grounding electrode by a conductor regardless of the position of the isolator. 2. A method of installing a simple lightning conductor from the top of the building to the bottom of the upper structure, with the main reinforcing bar or steel frame of the upper structure of the base-isolated building as the conducting wire, and then wiring to the ground electrode.
【０００４】避雷導線はこの「ＪＩＳ Ａ ４２０１−
１９９２」の３．１．３（１）の規定によれば次の通り
である。
（１）避雷導線は一つの被保護物について２条以上とす
る。被保護物の水平投影面積が５０ｍ2 以下のものにつ
いては１条でよい。The lightning conductor is this "JIS A 4201-
According to 3.1.2 (1) of "1992", it is as follows. (1) There shall be two or more lightning conductors for one protected item. If the horizontal projection area of the object to be protected is 50 m 2 or less, one article is sufficient.
【０００５】（２）建物外周部に沿って測った引下げ導
線の間隔は原則として５０ｍを超えない間隔とする。
（以下略）
上記ＪＩＳは上部構造体と基礎部分とがアイソレータに
よって電気的に絶縁される免震建物に対しての規定はな
いため、非免震建物と同様の避雷針設備となっている。(2) As a general rule, the distance between the down conductors measured along the outer periphery of the building should not exceed 50 m.
(Omitted) The above JIS does not provide for a base-isolated building in which the upper structure and the foundation are electrically insulated by an isolator, and therefore has the same lightning rod equipment as a non-seismic isolated building.
【０００６】[0006]
【発明が解決しようとする課題】避雷針設備は雷電流を
速やかに大地に流す必要がある。免震構造を備えていな
い建物であれば、建物自体が建物の杭、基礎部分で大地
と接しており、これらは「ＪＩＳ Ａ ４２０１−１９
９２」の３．２（ｃ）に示されているように、基礎の接
地抵抗が５Ω以下であれば接地極が省略可能とされてい
る。一般的には独立した接地極を設ける場合であっても
建物基礎部分は接地極の一部として機能している。この
ため、雷電流を速やかに大地に流すことができる。The lightning rod installation needs to quickly send a lightning current to the ground. If the building does not have a seismic isolation structure, the building itself is in contact with the ground at the piles and foundations of the building, and these are referred to as “JIS A 4201-19”.
As shown in 3.2 (c) of "92", the ground electrode can be omitted if the ground resistance of the foundation is 5Ω or less. Generally, even when an independent grounding electrode is provided, the building foundation part functions as a part of the grounding electrode. Therefore, the lightning current can be quickly passed to the ground.
【０００７】しかし、免震建物では上部構造体と基礎部
分とがアイソレータのゴムにより電気的に絶縁されてい
るので、上部構造体と接地極とを上記ＪＩＳの断面積の
限られた避雷導線で接続しただけでは、上部構造体の避
雷導線に雷電流が流れるとき上部構造体の電位上昇が不
均衡となり、電位上昇値もさらに大きくなる。このた
め、雷電流は電源線や通信線を通り建物外に流出するこ
ととなり、他の電気設備に障害を発生させる可能性が高
くなる。However, in a base-isolated building, since the upper structure and the foundation are electrically insulated by the rubber of the isolator, the upper structure and the ground electrode are provided with the lightning conductor having a limited cross-sectional area of JIS. Only by connecting, when the lightning current flows through the lightning conductor of the upper structure, the potential rise of the upper structure becomes unbalanced, and the potential rise value further increases. For this reason, the lightning current will flow out of the building through the power supply line and the communication line, and there is a high possibility that other electric equipment will be damaged.
【０００８】この発明は、免震建物におけるかかる問題
を解決するものであって、従来のＪＩＳ規格による避雷
針技術と免震工法の技術とを整合させ、電気的性能を高
めて落雷時の建物の電位上昇を均一化させると共に電位
上昇を低減させ、他の電気設備への障害発生を抑制する
ことのできる、免震建物における落雷時の建物の電位低
下設備を提供することを目的とする。The present invention solves such a problem in a base-isolated building by matching the conventional lightning rod technology according to the JIS standard with the technology of the base-isolated construction method to improve the electrical performance and to improve the performance of the building during a lightning strike. An object of the present invention is to provide a facility for lowering the potential of a building at the time of a lightning strike in a seismic isolated building, which can make the potential increase uniform and reduce the potential increase, and suppress the occurrence of a failure in other electric equipment.
【０００９】[0009]
【課題を解決するための手段】本発明では、上部構造体
と基礎部分とがアイソレータによって電気的に絶縁され
る免震建物において、上部構造体の底部に等電位化連絡
導線を格子状に配設、「仮想大地」となるものを構成
し、避雷針設備の突針と等電位化連絡導線とを避雷導線
で接続すると共に、等電位化連絡導線と接地極とを接続
するための接続避雷導線を各アイソレータの置かれる柱
毎に設けることにより、免震建物における落雷時の建物
の電位上昇を均一化させると共に電位の上昇を低減して
いる。According to the present invention, in a base-isolated building in which an upper structure and a base portion are electrically insulated by an isolator, equipotential connecting conductor wires are arranged in a grid pattern at the bottom of the upper structure. Install a lightning conductor to connect the protruding pin of the lightning rod equipment and the equipotential communication conductor with the lightning conductor, and to connect the equipotential communication conductor and the ground electrode. By installing each isolator on each pillar, the potential rise of the building at the time of a lightning strike in the base-isolated building is made uniform and the rise of the potential is reduced.
【００１０】等電位化連絡導線及び避雷導線として、上
部構造体の主構造物である鉄筋又は鉄骨の柱、梁及び上
部構造体の底部梁の各部位を一体に接続した導体として
代用すれば、建物頂部から上部構造体の底部までの避雷
導線を簡略化することができる。この場合、ＪＩＳ規格
と整合をとるために鉄骨鉄筋コンクリート造の場合は鉄
骨、鉄筋コンクリート造の場合は主鉄筋２条以上を避雷
導線の一部である引き下げ導線として代用し規定数を配
設、各引き下げ導線に１個以上の接地極を設ける。[0010] As the equipotential of contact wires and lightning conductor, rebar or steel pillars which is the main structure of the superstructure, if substituted for each part of the bottom beam of the beam and the upper structure as a conductor connected together, The lightning conductor from the top of the building to the bottom of the upper structure can be simplified. In this case, in order to comply with the JIS standard, in the case of steel-framed reinforced concrete, the steel frame is used, and in the case of reinforced concrete, two or more main reinforcing bars are used as pull-down conductors that are part of the lightning conductor, and the specified number is arranged. Provide one or more ground poles on the conductor.
【００１１】[0011]
【発明の実施の形態】図１は本発明の実施の一形態であ
る免震建物における落雷時の建物の電位低下設備の構成
を示す立面図、図２は上部構造体の底部の等電位化連絡
導線の配置を示す平面図である。1 is an elevational view showing the structure of a facility for lowering the potential of a building during a lightning strike in a base-isolated building, which is an embodiment of the present invention, and FIG. 2 is an equipotential at the bottom of an upper structure. It is a top view which shows arrangement | positioning of the chemical | medical communication wire.
【００１２】ここで、免震建物１は、上部構造体２と基
礎３との間にアイソレータ４を設けて免震構造とした鉄
筋コンクリート造あるいは鉄骨鉄筋コンクリート造の建
物であって、上部構造体２と基礎３との間がアイソレー
タ４によって電気的に絶縁されている。The seismic isolated building 1 is a building of reinforced concrete structure or steel frame reinforced concrete structure having an isolator 4 provided between the upper structure 2 and the foundation 3 to provide a seismic isolation structure. The base 3 is electrically insulated by the isolator 4.
【００１３】上部構造体２の底部には、等電位化連絡導
線５が図２に示すように格子状に配設されており、各交
差部６は電気的に接続されている。電位化連絡導線５は
ＪＩＳに準拠した避雷導線を底部梁内に敷設するが、底
部梁の２条以上の主鉄筋を利用することもできる。At the bottom of the upper structure 2, equipotential connecting conductors 5 are arranged in a grid pattern as shown in FIG. 2, and the intersections 6 are electrically connected. As the potential connecting conductor 5, a lightning conductor according to JIS is laid inside the bottom beam, but it is also possible to use two or more main reinforcing bars of the bottom beam.
【００１４】上部構造体２の頂部には、避雷針設備の突
針７が立設されており、この突針７から等電位化連絡導
線５まで避雷導線８が設けられている。避雷導線８はＪ
ＩＳに準拠し、避雷導線を敷設するか又は主鉄筋あるい
は鉄骨を利用する。At the top of the upper structure 2, a projecting rod 7 of a lightning rod installation is erected, and a lightning conducting wire 8 is provided from the projecting rod 7 to the equipotential communication conductor 5. Lightning conductor 8 is J
According to IS, lay a lightning conductor or use main reinforcing bars or steel frames.
【００１５】さらに、各アイソレータ４の置かれる柱毎
に、等電位化連絡導線５と接地極９とを接続するための
接続避雷導線１０が設けられている。使用する導線の断
面積はＪＩＳに準拠のものを選定する。Further, a connection lightning conductor 10 for connecting the equipotentialization communication conductor 5 and the ground electrode 9 is provided for each pillar on which each isolator 4 is placed. The cross-sectional area of the conductor used should be JIS-compliant.
【００１６】この設備では上部構造体２の底部に等電位
化連絡導線５が格子状に設けられているので、落雷時に
上部構造体２の底部での電位上昇は均一化される。ま
た、各アイソレータ４の置かれる柱毎に、等電位化連絡
導線５と接地極９とを接続するための接続避雷導線１０
が設けられているので、上部構造体２の電位の上昇は効
果的に低減される。従って、他の電気設備への障害発生
も抑制できる。In this equipment, since the equipotentialization connecting conductors 5 are provided in the bottom of the upper structure 2 in a grid pattern, the potential increase at the bottom of the upper structure 2 is made uniform during a lightning strike. Further, for each pillar on which each isolator 4 is placed, a connecting lightning conductor 10 for connecting the equipotentialization connecting conductor 5 and the ground electrode 9 to each other.
Is provided, the increase in the potential of the upper structure 2 is effectively reduced. Therefore, it is possible to prevent a failure from occurring in other electric equipment.
【００１７】等電位化連絡導線５として上部構造体２の
鉄筋又は鉄骨を代替すれば、柱、梁及び上部構造体２の
底部梁の各部を一体に導線として代用することとなり、
建物頂部から上部構造体２の底部までの避雷導線８が簡
略化できる。If the reinforcing bar or the steel frame of the upper structure 2 is replaced as the equipotential connecting conductive wire 5, each part of the pillar, the beam and the bottom beam of the upper structure 2 will be integrally substituted as a conductive wire.
The lightning conductor 8 from the top of the building to the bottom of the upper structure 2 can be simplified.
【００１８】[0018]
【発明の効果】以上説明したように、本発明の免震建物
における落雷時の建物の電位低下設備は、従来のＪＩＳ
規格による避雷針技術と免震工法の技術とを整合させ、
電気的性能を高めて落雷時の建物の電位上昇を均一化さ
せると共に電位上昇を低減させ、他の電気設備への障害
発生を抑制することができる。具体的には電気機器は一
定の耐電圧量があり、雷サージについても「インパルス
耐電圧」としてサージ耐量か見込まれている。免震建物
では落雷時にこの耐量を超える雷電流が流れる可能性が
高くなり、電気機器を保護するために、建物内電気配線
に雷保護装置を付加する必要がでてくる。建物の電位上
昇を抑えることができれば、電気配線は従来の技術内容
をそのまま使うことができる。As described above, the facility for lowering the potential of a seismic isolated building according to the present invention at the time of a lightning strike is the same as the conventional JIS.
Matching the standard lightning rod technology and the technology of seismic isolation method,
It is possible to improve the electric performance to make the potential increase of the building at the time of a lightning strike uniform, reduce the potential increase, and suppress the occurrence of obstacles to other electric equipment. Specifically, electrical equipment has a certain amount of withstand voltage, and it is expected that the surge withstand voltage will be "impulse withstand voltage" for lightning surges. In a base-isolated building, there is a high possibility that a lightning current exceeding this withstand level will flow at the time of a lightning strike, and it will be necessary to add a lightning protection device to the electric wiring in the building in order to protect electrical equipment. If the potential rise of the building can be suppressed, the electrical wiring can use the conventional technical contents as it is.
【図１】本発明の実施の一形態である免震建物における
落雷時の建物の電位低下設備の構成を示す立面図であ
る。FIG. 1 is an elevational view showing a configuration of a potential lowering facility for a building at the time of a lightning strike in a seismic isolated building according to an embodiment of the present invention.
【図２】上部構造体の底部の等電位化連絡導線の配置を
示す平面図である。FIG. 2 is a plan view showing the arrangement of equipotentialization connecting conductors on the bottom of the upper structure.
１ 免震建物 ２ 上部構造体 ３ 基礎 ４ アイソレータ ５ 等電位化連絡導線 ６ 交差部 ７ 突針 ８ 避雷導線 ９ 接地極 １０ 接続避雷導線 1 seismic isolated building 2 Upper structure 3 basics 4 Isolator 5 equipotential connection conductor 6 intersection 7 needle 8 lightning conductor 9 Ground pole 10 connection lightning conductor
フロントページの続き (56)参考文献 特開 平６−294239（ＪＰ，Ａ) 特開 平７−212949（ＪＰ，Ａ) 実開 昭51−34220（ＪＰ，Ｕ) 実開 平２−149067（ＪＰ，Ｕ) 実開 昭59−99398（ＪＰ，Ｕ) 実開 昭49−69738（ＪＰ，Ｕ) 実開 平３−73363（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02G 13/00 Continuation of the front page (56) Reference JP-A-6-294239 (JP, A) JP-A-7-212949 (JP, A) Actually open 51-34220 (JP, U) Actually open 2-149067 (JP , U) Actual development Sho 59-99398 (JP, U) Actual development Sho 49-69738 (JP, U) Actual development Hei 3-73363 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB) Name) H02G 13/00
Claims (2)
によって電気的に絶縁される免震建物において、上部構
造体の底部に等電位化連絡導線を格子状に配設、仮想大
地となるものを構成し、避雷針設備の突針と等電位化連
絡導線とを避雷導線で接続すると共に、等電位化連絡導
線と接地極とを接続するための接続避雷導線を各アイソ
レータの置かれる柱毎に設けたことを特徴とする免震建
物における落雷時の建物の電位低下設備。1. In a base-isolated building in which an upper structure and a foundation are electrically insulated by an isolator, equipotential connecting conductors are arranged in a grid pattern on the bottom of the upper structure to form a virtual ground. The lightning rod equipment is configured to connect the protrusion and the equipotential communication wire with the lightning conductor wire, and the connection lightning conductor wire for connecting the equipotential communication wire and the ground electrode is provided for each pillar where each isolator is placed. A facility for lowering the potential of a seismic isolated building during a lightning strike.
である鉄筋又は鉄骨の柱、梁と、等電位化連絡導線とし
ての上部構造体の主構造物である鉄筋又は鉄骨の底部梁
の各部位とを一体に接続した導体として代用することを
特徴とする請求項１記載の免震建物における落雷時の建
物の電位低下設備。 2. A avoid rebar or steel pillars which is the main structure of the superstructure of the lightning conductor, and beams, and equipotential contact conductor
Building potential of lightning strikes in the seismic isolation building according to claim 1, in which the respective portions of the bottom beam rebar or steel, characterized in that substitute as a conductor connected together is the main structure of the superstructure of Te Degradation equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07995198A JP3436344B2 (en) | 1998-03-26 | 1998-03-26 | Potential lowering equipment for lightning strikes in base-isolated buildings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07995198A JP3436344B2 (en) | 1998-03-26 | 1998-03-26 | Potential lowering equipment for lightning strikes in base-isolated buildings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11285139A JPH11285139A (en) | 1999-10-15 |
| JP3436344B2 true JP3436344B2 (en) | 2003-08-11 |
Family
ID=13704625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07995198A Expired - Fee Related JP3436344B2 (en) | 1998-03-26 | 1998-03-26 | Potential lowering equipment for lightning strikes in base-isolated buildings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3436344B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004187416A (en) * | 2002-12-04 | 2004-07-02 | Asahi Electric Works Ltd | Electrically conductive connection method and structure thereof |
-
1998
- 1998-03-26 JP JP07995198A patent/JP3436344B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11285139A (en) | 1999-10-15 |
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