JP2007138438A - Deformation restraining structure of tower structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the deformation restraining structure of a tower structure minimizing influence caused by flexural deformation of the tower structure itself located below a post member by holding the post member vertically even when the lower end of the post member fitted to a structure body is horizontally displaced or inclines. <P>SOLUTION: The deformation restraining structure restrains the deformation of a top part of a communication tower (the tower structure) 10 having the post member 30 for supporting an antenna, and a long-sized steel frame part 22 supporting the post member 30 by the top part through a holding member 40. The holding member 40 positions the respective center axes 22a, 30a of the steel frame part 22 and the post member 30 on the same straight line in a vertical direction in a normal state and absorbs the relative displacement of the respective center axes which occurs between the steel frame part 22 and the post member 30 when the steel frame part 22 is horizontally displaced or inclines. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure for suppressing deformation of a tower-like structure, and more particularly to a structure for suppressing deformation of an upper part of a tower-like structure that supports an antenna of, for example, a television, satellite communication, or a mobile phone.

  In recent years, with the shift from analog communication to digital communication and the spread of mobile terminal devices such as mobile phones, a highly reliable transmission / reception facility up to higher frequencies has been demanded. For example, in terrestrial digital broadcasting of television, strict conditions are required so that the inclination angle of the antenna of the television tower is within 0.5 ° in order to maintain stable image quality.

  Communication facilities must continue to function during earthquakes and typhoons, and it was necessary to increase the rigidity of tower structures such as TV towers in order to reduce the deformation of communication facilities, that is, to suppress the angle of inclination of the antenna. . For this reason, the size of the cross-sectional area is not determined from the stress as in a normal structure, but the cross-sectional area of the tower-like structure is increased to suppress deformation. Especially in large facilities, it is necessary to increase the cross-sectional area in order to suppress bending deformation of the tower-like structure, and as a result, a relatively large installation area is required. It was a big problem.

  In order to solve such problems, the following tower-like structures have been proposed. That is, it is a tower-like structure comprising a column member (lightning rod and column in the literature described later) and a structure body (steel tower in the document described later) that supports the column member, While maintaining the state, the lower end is supported in such a manner that only the force in the horizontal direction is transmitted on the table provided inside the structure body, and the high damping rubber provided on the top of the structure body They are connected by bearings. In such a tower-like structure, the high damping rubber bearing is sheared and deformed by the horizontal force generated by an earthquake or wind to absorb energy, and the column member remains in a vertical state, and the tower-like structure itself Bending deformation can be minimized (see, for example, Patent Document 1). With such a tower structure, it is not necessary to increase the installation area more than necessary.

JP 2002-188321 A

  However, the tower-like structure as proposed in Patent Document 1 does not have a mechanism that can absorb rotation at the lower end of the column member, and is effective for horizontal vibration caused by an earthquake or the like. When the structure is inclined at the lower end of the column, the support member is inclined, and as a result, the bending deformation of the tower-shaped structure may be increased.

  In view of the above circumstances, the present invention is a tower-like structure that holds a column member in a vertical direction and is below the column member even when the lower end of the column member attached to the structure body is displaced or tilted in the horizontal direction. It is an object of the present invention to provide a deformation suppressing structure for a tower structure that suppresses the influence of bending deformation of the object itself to a minimum.

  In order to achieve the above object, a tower-like structure deformation suppressing structure according to claim 1 of the present invention is a long member that supports a column member that supports an object, and a column member that supports the column member via a receiving member. In the deformation suppressing structure that suppresses deformation of the top of the tower-like structure having a shape-like structure main body, the receiving member normally has the center axis of the structure main body and the column member aligned in the same vertical direction. When the structure main body is displaced or tilted in the horizontal direction while being positioned on the line, the relative displacement of the respective central axes occurring between the structure main body and the column member is absorbed. Features.

  Further, the tower-like structure deformation suppressing structure according to claim 2 of the present invention is the above-described structure according to claim 1, wherein the receiving member is configured such that when the structure main body is displaced or inclined in the horizontal direction, It has the 1st smooth surface which slides between the top parts of an object main body, and the 2nd smooth surface which slides between the said support | pillar members, It is characterized by the above-mentioned.

  Moreover, the deformation suppression structure for a tower-like structure according to claim 3 of the present invention is the concave shape in which the upper end surface of the structure body is gradually recessed from the outer peripheral portion toward the center portion in the above-described claim 2. The support surface formed on the support member has a concave spherical shape that gradually decreases from the outer peripheral portion toward the central portion, and the first smooth surface is centered from the outer peripheral portion. The second smooth surface protrudes gradually upward from the outer peripheral portion toward the central portion, while protruding downward toward the portion and forming a convex spherical shape having a curvature substantially equal to the upper end surface. It has a convex spherical shape having a curvature substantially equal to that of the support surface.

  The tower-like structure deformation suppressing structure according to claim 4 of the present invention is the above-described structure according to claim 2, wherein the upper end surface of the structure body protrudes gradually upward from the outer peripheral portion toward the center portion. The support surface formed on the column member has a convex spherical shape that gradually protrudes downward from the outer peripheral portion toward the center portion, and the first smooth surface is the upper surface. The second smooth surface has substantially the same curvature as the support surface, while having a concave spherical shape that has a curvature substantially equal to the end surface and gradually concaves from the outer peripheral portion toward the central portion. In addition, a concave spherical shape gradually dents from the outer peripheral portion toward the central portion is characterized.

  Moreover, the deformation | transformation suppression structure of the tower-shaped structure which concerns on Claim 5 of this invention is the through-hole which the lower end part formed in the said receiving member in any one of Claims 1-4 mentioned above. It penetrates into the inside of the structure main body in a form penetrating through and is supported through a damping mechanism.

  According to the invention of the present invention, when the receiving member normally positions the central axes of the structure main body and the column member on the same straight line in the vertical direction, the structure main body is displaced or inclined in the horizontal direction. Since the relative displacement of each central axis that occurs between the structure body and the column member is absorbed, the column member is held in the vertical direction and the tower-like structure itself below the column member is bent. There is an effect that the inclination of the support member due to the deformation can be suppressed to the minimum.

  Exemplary embodiments of a tower-like structure deformation suppressing structure according to the present invention will be described below in detail with reference to the accompanying drawings.

<Embodiment 1>
1 to 3 show a tower-like structure to which the deformation suppressing structure according to Embodiment 1 of the present invention is applied, FIG. 1 is a side view, and FIG. FIG. 3 is a model diagram schematically showing the state of FIG. The tower-like structure illustrated here is a large communication tower 10 having a height of about 600 m above the ground, and includes a tower body 20 and a column member 30.

  The tower main body 20 extends along the vertical direction, and supports the column member 30 at the top. The tower main body 20 includes a reinforced concrete cylinder (hereinafter also referred to as an RC cylinder) 21 and a steel frame (structure main body) 22.

  The RC cylinder 21 is erected on the underground base portion 11 buried underground, and includes a lower RC portion 21a, a middle RC portion 21b, and an upper RC portion 21c. Here, the lower RC part 21a is the lowest part, for example, the part that occupies up to about 60 m above the ground, and is the part with the highest strength. The middle RC portion 21b is a portion located on the upper side of the lower RC portion 21a, for example, a portion occupying between 60 m and 310 m above the ground, and has a cylindrical shape. The upper RC portion 21c is a portion located on the upper side of the middle RC portion 21b, for example, a portion occupying between 310 to 450 m above the ground, and has a tapered shape in which the outer diameter gradually decreases toward the upper side.

  The steel frame 22 has a long shape (for example, 70 m) formed by processing a steel material, for example, and is erected on the upper side of the RC cylinder 21 (upper RC portion 21c). That is, it is a portion that occupies, for example, between 450 to 520 m above the ground of the communication tower 10. The upper end surface 23 serving as the top of the steel frame portion 22 is a bottom surface of a concave portion that opens upward, and more specifically, a concave that gradually becomes deeper (downward) from the outer peripheral portion toward the central portion. It has a spherical shape. This upper end surface 23 is smooth. In addition, an opening hole 24 that opens in a circular shape and communicates with the internal space is formed in the central portion of the upper end surface 23, that is, the portion corresponding to the central axis of the steel frame portion 22. This opening hole 24 has a diameter larger than the outer diameter of the lower end part of the support | pillar member 30 mentioned later. Further, as shown in FIG. 2, the internal space of the steel frame portion 22 has a width larger than the diameter of the opening hole 24, and an intermediate beam 25 is appropriately provided.

  The column member 30 is made of, for example, steel or the like processed into a columnar shape, and is installed at the highest position (520 to 600 m above the ground) of the communication tower 10. For example, the antenna member that supports an object such as an antenna is attached. It is a platform. A disk-shaped support piece 31 protruding in the radially outward direction is provided around a portion that is substantially in the middle of the column member 30. The outer diameter of the support piece 31 has a size substantially equal to the width of the steel frame portion 22. Further, the support surface 32 which is the lower surface of the support piece 31 is a bottom surface of a recess opening downward, and more specifically, a recess that gradually becomes deeper (upward) from the outer peripheral portion toward the center portion. It has a spherical shape. A weight member 33 such as a battery is integrally provided at the lower end portion of the support member 30.

  Such a column member 30 is installed in a state where the lower end portion enters the inside of the steel frame portion 22 through the opening hole 24 of the steel frame portion 22 of the tower body 20. More specifically, in the state where the support member 40 is interposed, the column member 30 enters the inside of the steel frame portion 22 with the lower end portion thereof being vertically moved (high) It is supported via a damping mechanism 26 such as an oil damper provided separately in the vertical direction. That is, the steel frame portion 22 (tower body 20) supports the column member 30 at the top via the receiving member 40. The receiving member 40 will be described.

  As described above, the receiving member 40 is interposed between the steel frame portion 22 and the support member 30, and more specifically, the top of the steel structure portion 22, the support piece 31 of the support member 30, and Between them. The receiving member 40 has a form obtained by processing a substantially cylindrical member having a short vertical length, and the outer diameter is substantially equal to the outer diameter of the support piece 31. . The lower surface 41 of the receiving member 40 has a convex spherical shape protruding gradually downward from the outer peripheral portion toward the central portion, while the upper surface 42 is a convex protruding gradually upward from the outer peripheral portion toward the central portion. The receiving member 40 has a spherical shape, and the shape of the receiving member 40 is roughly like an abacus ball. Here, the lower surface 41 of the receiving member 40 has a curvature substantially equal to that of the upper end surface 23 of the steel frame portion 22, and the upper surface 42 of the receiving member 40 has a curvature substantially equal to that of the support surface 32 of the support piece 31. is doing. The upper and lower surfaces 41 and 42 of the receiving member 40 are provided with rubber members (not shown in the drawing) such as laminated rubber (shown in the form of a spring in FIG. 3). In addition, the code | symbol 40a in FIG. 3 is a virtual support point.

  In addition, the receiving member 40 is provided with a through-hole 43 extending along the vertical direction on the central axis. The through hole 43 penetrates the lower end portion of the column member 30, has a diameter substantially equal to the opening hole 24 of the steel frame portion 22, and has a diameter larger than the outer diameter of the column member 30. .

  And the acceptance member 40 is inserted between the upper end surface 23 of the steel frame 22 and the support piece 31 of the support member 30 through the through hole 43 at the lower end of the support member 30. Since the lower surface 41 of the receiving member 40 has substantially the same curvature as the upper end surface 23 of the steel frame portion 22, the maximum projecting portion of the lower surface 41 coincides with the maximum recessed portion of the upper end surface 23. That is, the central axis of the receiving member 40 and the central axis of the steel frame portion 22 coincide with each other on the same straight line in the vertical direction. Further, since the upper surface 42 of the receiving member 40 has a curvature substantially equal to that of the lower surface 41 of the support piece 31 of the column member 30, the maximum projecting portion of the upper surface 42 coincides with the maximum recessed portion of the lower surface 41. That is, the center axis of the receiving member 40 and the center axis of the support member 30 are aligned on the same straight line in the vertical direction.

  In this manner, the receiving member 40 is normally in a state where the lower end portion of the column member 30 is passed through the through hole 43, and the center axes 22a and 30a of the steel frame portion 22 and the column member 30 as shown in FIG. Are positioned on the same straight line in the vertical direction.

  In such a communication tower 10, when horizontal vibration occurs due to an earthquake or the like, the tower body 20 is displaced in the horizontal direction. When the tower body 20 is displaced in the horizontal direction, the steel frame portion 22 is similarly displaced in the horizontal direction. In such a case, as shown in FIG. 5, in the receiving member 40, the lower surface 41 slides as a first smooth surface due to inertia with the upper end surface 23 of the steel frame 22, and at the same time, the upper surface 42 also serves as the second smooth surface. It slides due to inertia with the support surface 32 of the column member 30. That is, the support member 40 has a convex spherical shape in which the upper and lower surfaces 41 and 42 have substantially the same curvature as the corresponding upper end surface 23 and the support surface 32 (both concave spherical shapes), respectively. Without displacing the vertical gravity component of the steel frame, it slides in a manner that cancels out the force generated by the horizontal displacement of the steel frame 22. As a result, the receiving member 40 absorbs the relative displacement of the respective central axes 22 a and 30 a caused by the horizontal displacement of the steel frame portion 22 between the steel frame portion 22 and the column member 30. As a result, the column member 30 can be held in a state in which the central axis 30a extends in the vertical direction.

  Further, when horizontal vibration occurs due to an earthquake or the like, the steel frame portion 22 is inclined due to bending deformation of the tower body 20. In such a case, as shown in FIG. 6, in the receiving member 40, the lower surface 41 slides as a first smooth surface due to inertia with the upper end surface 23 of the steel frame portion 22, and at the same time, the upper surface 42 also serves as a second smooth surface. It slides due to inertia with the support surface 32 of the column member 30. That is, the support member 40 has a convex spherical shape in which the upper and lower surfaces 41 and 42 have substantially the same curvature as the corresponding upper end surface 23 and the support surface 32 (both concave spherical shapes), respectively. The gravity component in the vertical direction is not dispersed and slips in a manner that cancels the force generated by the inclination of the steel frame portion 22. Thereby, the receiving member 40 absorbs the relative displacement of each central axis 22a, 30a which arises by the inclination of the steel frame part 22 between the steel frame part 22 and the support | pillar member 30. FIG. As a result, the column member 30 can be held in a state in which the central axis 30a extends in the vertical direction.

  When the horizontal vibration due to an earthquake or the like ends and the shaking is stopped, the receiving member 40 does not disperse the gravity component in the vertical direction of the column member 30 due to the gravity of the weight member 33, and the lower surface 41 has the steel frame part. The upper surface 42 can also slide with the support surface 32 of the column member 30, and the column member 30 can be restored to the original position.

  As described above, according to the deformation suppressing structure in the first embodiment of the present invention, the receiving member 40 normally has the central axes 22a and 30a of the steel frame portion 22 (tower body 20) and the column member 30. When the steel frame portion 22 is displaced or tilted in the horizontal direction while being positioned on the same straight line in the vertical direction, the relative center axes 22a and 30a generated between the steel frame portion 22 and the column member 30 are relatively different. Therefore, the column member 30 can be disposed along the vertical direction, thereby minimizing the inclination of the column member 30 due to bending deformation of the communication tower 10 itself caused by horizontal vibration caused by an earthquake or the like. Can be suppressed.

  According to the above-described deformation suppressing structure, the weight member 33 is integrally provided at the lower end portion of the column member 30. Therefore, when the horizontal vibration due to an earthquake or the like ends and the shaking stops, the receiving member 40 The lower surface 41 slides between the upper end surface 23 of the steel frame portion 22 without dispersing the vertical gravity component of the column member 30 due to the gravity of the member 33, and at the same time, the upper surface 42 is also separated from the support surface 32 of the column member 30. And the column member 30 can be restored to the original position, and there is no possibility of the residual deformation of the communication tower 10 itself. Further, if the distance between the weight member 33 and the receiving member 40 is further increased, it is possible to increase the period of shaking caused by horizontal vibration, thereby reducing the response (swing) caused by an earthquake or the like. It becomes possible to do.

  Further, according to the deformation suppressing structure, since the rubber members are provided on the upper and lower surfaces 41, 42 of the receiving member 40, the rubber member is deformed when a horizontal vibration due to an earthquake or the like occurs, and the impact applied to the receiving member 40. Can be relaxed.

  Furthermore, according to the deformation suppressing structure, since the lower end portion of the support member 30 is supported via the damping mechanism 26, the response displacement of the support member 30 caused by horizontal vibration can be reduced by increasing the damping of the vibration system. In addition, when horizontal vibration due to an earthquake or the like ends, the vibration can be quickly converged. In particular, since the two damping mechanisms 26 are provided separately on the upper and lower sides, the relative displacement of the column member 30 due to the steel frame 22 being displaced or inclined in the horizontal direction can be controlled simultaneously. . And the response displacement of the support | pillar member 30 can also be reduced more by controlling the damping mechanism 26 to active (active) by computer control.

<Embodiment 2>
7 and 8 each show a tower-like structure to which the deformation suppressing structure according to Embodiment 2 of the present invention is applied, and FIG. 7 is a cross-sectional side view showing an enlarged main part. FIG. 8 is a model diagram schematically showing the state of FIG. In addition, the same code | symbol is attached | subjected to what has the same structure as the tower-like structure (communication tower) in Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

  7 and 8, the communication tower has a tower body 20 'and a support member 30'.

  The tower main body 20 'extends along the vertical direction and supports the column member 30' at the top. This tower main body 20 'has an RC cylinder 21 and a steel frame portion 22'.

  The steel frame portion 22 ′ has a long shape (for example, 70 m) formed by processing steel or the like, for example, and is erected on the upper side of the RC cylinder 21 (upper RC portion 21 c). That is, it is a part that occupies, for example, between 450 to 520 m above the ground of the communication tower. An upper end surface 23 'serving as the top of the steel frame portion 22' has a convex spherical shape that gradually protrudes upward from the outer peripheral portion toward the center portion. This upper end surface 23 'is smooth. An opening hole 24 is formed in the center portion of the upper end surface 23 ', that is, the portion corresponding to the center axis of the steel frame portion 22'. The opening hole 24 opens in a circular shape and communicates with the internal space. This opening hole 24 has a diameter larger than the outer diameter of the lower end part of the support | pillar member 30 'mentioned later. Further, as shown in FIG. 7, the internal space of the steel frame portion 22 ′ has a width larger than the diameter of the opening hole 24, and an intermediate beam 25 is appropriately provided.

  The column member 30 ′ is made of, for example, a steel material processed into a columnar shape, and is installed at the highest position (520 to 600 m above the ground) of the communication tower. For example, an antenna mounting for supporting an object such as an antenna is provided. It is a platform. A disk-like support piece 31 ′ protruding in the radially outward direction is provided around a portion that is substantially in the middle of the column member 30 ′. The outer diameter of the support piece 31 'has a size substantially equal to the width of the steel frame portion 22'. Further, the support surface 32 'serving as the lower surface of the support piece 31' has a convex spherical shape that gradually protrudes downward from the outer peripheral portion toward the center portion.

  Such a column member 30 'is installed in a state where the lower end portion enters the inside of the steel frame portion 22' through the opening hole 24 of the steel frame portion 22 'of the tower body 20'. More specifically, in the state where the support member 50 is interposed, the support member 30 'enters the inside of the steel frame portion 22' with the lower end portion inserted therein, and the lower end portion that has entered enters the inside of the steel frame portion 22 '. It is supported via a damping mechanism 26 such as an oil damper that is provided two vertically (in the height direction). That is, the steel frame portion 22 ′ (tower body 20 ′) supports the column member 30 ′ at the top via the receiving member 50. The receiving member 50 will be described.

  As described above, the receiving member 50 is interposed between the steel frame portion 22 ′ and the column member 30 ′. More specifically, the top of the steel frame portion 22 ′ and the column member 30 ′ It is interposed between the support piece 31 '. The receiving member 50 has a form obtained by processing a substantially cylindrical shape having a short vertical length, and the outer diameter is substantially equal to the outer diameter of the support piece 31 '. ing. The lower surface 51 of the receiving member 50 is a bottom surface of a concave portion that opens downward, and more specifically, has a concave spherical shape that gradually becomes deeper (upward) from the outer peripheral portion toward the central portion. ing. On the other hand, the upper surface 52 is a bottom surface of a concave portion that opens upward, and more specifically, has a concave spherical shape that gradually becomes deeper (downward) from the outer peripheral portion toward the central portion. Yes. Here, the lower surface 51 of the receiving member 50 has substantially the same curvature as the upper end surface 23 'of the steel frame portion 22', and the upper surface 52 of the receiving member 50 is substantially the same as the support surface 32 'of the support piece 31'. Have equal curvature. On the upper and lower surfaces 51 and 52 of the receiving member 50, rubber members such as laminated rubber (not shown in the drawing) (shown in the form of a spring in FIG. 8) are provided. In addition, the code | symbol 50a in FIG. 8 is a virtual support point.

  In addition, the receiving member 50 is provided with a through hole 53 extending along the vertical direction on the central axis thereof. The through hole 53 penetrates the lower end portion of the column member 30 ', has a diameter substantially equal to the opening hole 24 of the steel frame portion 22', and has a diameter larger than the outer diameter of the column member 30 '. is doing.

  The receiving member 50 is inserted through the through hole 53 in the lower end portion of the support member 30 ', and is interposed between the upper end surface 23' of the steel frame portion 22 'and the support piece 31' of the support member 30 '. However, since the lower surface 51 of the receiving member 50 has substantially the same curvature as the upper end surface 23 'of the steel frame portion 22', the maximum indented portion of the lower surface 51 coincides with the maximum protruding portion of the upper end surface 23 '. It becomes a state to do. That is, the center axis of the receiving member 50 and the center axis of the steel frame portion 22 ′ are aligned on the same straight line in the vertical direction. Further, since the upper surface 52 of the receiving member 50 has substantially the same curvature as the support surface 32 ′ of the column member 30 ′, the maximum recessed portion of the upper surface 52 coincides with the maximum projecting portion of the support surface 32 ′. . That is, the center axis of the receiving member 50 and the center axis of the column member 30 ′ are aligned on the same straight line in the vertical direction.

  In this way, the receiving member 50 is normally in a state where the lower end portion of the column member 30 'is passed through the through hole 53, as shown in FIG. 9, the central axes of the steel frame portion 22' and the column member 30 '. 22b and 30b are located on the same straight line in the vertical direction.

  In such a communication tower, when horizontal vibration occurs due to an earthquake or the like, the tower body 20 'is displaced in the horizontal direction. When the tower body 20 ′ is displaced in the horizontal direction, the steel frame portion 22 ′ is similarly displaced in the horizontal direction. In such a case, as shown in FIG. 10, in the receiving member 50, the lower surface 51 slides due to inertia with the upper end surface 23 'of the steel frame 22' as the first smooth surface, and at the same time, the upper surface 52 also slides into the second slide. As a surface, it slides by inertia between the support surface 32 'of the column member 30'. In other words, the receiving member 50 has a concave spherical shape in which the upper and lower surfaces 51, 52 have substantially the same curvature as the corresponding upper end surface 23 ′ and support surface 32 ′ (both convex spherical shapes). The member 30 'slides in a manner that cancels out the force generated by the horizontal displacement of the steel frame 22' without dispersing the vertical gravity component. Thereby, the receiving member 50 absorbs the relative displacement of the respective central axes 22b and 30b caused by the horizontal displacement of the steel frame portion 22 'between the steel frame portion 22' and the column member 30 '. As a result, the column member 30 ′ can be held in a state where the central axis 30 b extends in the vertical direction.

  Further, when horizontal vibration occurs due to an earthquake or the like, the steel frame portion 22 'is inclined due to bending deformation of the tower body 20'. In such a case, as shown in FIG. 11, in the receiving member 50, the lower surface 51 serves as a first sliding surface due to inertia with the upper end surface 23 'of the steel frame 22', and at the same time, the upper surface 52 also slides into the second sliding surface. As a surface, it slides by inertia between the support surface 32 'of the column member 30'. In other words, the receiving member 50 has a concave spherical shape in which the upper and lower surfaces 51, 52 have substantially the same curvature as the corresponding upper end surface 23 ′ and support surface 32 ′ (both convex spherical shapes). The member 30 'slides in such a manner as to cancel the force generated by the inclination of the steel frame portion 22' without dispersing the gravity component in the vertical direction. Thereby, the receiving member 50 absorbs the relative displacement of each central axis 22b, 30b which arises by inclination of the steel frame part 22 'between the steel frame part 22' and the support | pillar member 30 '. As a result, the column member 30 ′ can be held in a state where the central axis 30 b extends in the vertical direction.

  When the horizontal vibration due to an earthquake or the like ends and the shaking stops, the receiving member 50 does not disperse the gravity component in the vertical direction of the column member 30 ′ due to the gravity of the weight member 33, and the lower surface 51 is made of the steel frame. The upper surface 52 is slid between the upper end surface 23 ′ of the portion 22 ′ and simultaneously the upper surface 52 is also slid between the support surface 32 ′ of the column member 30 ′ and the column member 30 ′ can be restored to the original position.

  As described above, according to the deformation suppressing structure in the second embodiment of the present invention, the receiving member 50 is normally the central shaft 22b of each of the steel frame portion 22 '(tower body 20') and the column member 30 '. , 30b are positioned on the same straight line in the vertical direction, while the steel frame portion 22 'is displaced or tilted in the horizontal direction, the respective centers generated between the steel frame portion 22' and the column member 30 ' Since the relative displacement of the shafts 22b and 30b is absorbed, the column member 30 'can be arranged along the vertical direction, and thereby the column member due to bending deformation of the communication tower itself caused by horizontal vibration caused by an earthquake or the like. The inclination of 30 'can be minimized.

  According to the above deformation suppressing structure, the weight member 33 is integrally provided at the lower end portion of the column member 30 ′. Therefore, when the horizontal vibration due to an earthquake or the like ends and the shaking stops, the receiving member 50 The lower surface 51 slides between the upper end surface 23 ′ of the steel frame 22 ′ without dispersing the vertical gravity component of the column member 30 ′ due to the gravity of the weight member 33, and at the same time, the upper surface 52 also supports the column member 30 ′. And the support member 32 'can be restored to the original position, so that there is no risk of residual deformation of the communication tower itself. Further, if the distance between the weight member 33 and the receiving member 50 is further increased, a longer period of shaking caused by horizontal vibration can be achieved, thereby reducing response (swing) due to an earthquake or the like. It becomes possible to do.

  Further, according to the deformation suppressing structure, since the rubber members are provided on the upper and lower surfaces 51, 52 of the receiving member 50, the rubber member is deformed when a horizontal vibration due to an earthquake or the like occurs, and the impact applied to the receiving member 50. Can be relaxed.

  Further, according to the deformation suppressing structure, since the lower end portion of the support member 30 'is supported via the damping mechanism 26, the response displacement of the support member 30' caused by horizontal vibration is reduced by increasing the damping of the vibration system. In addition, when the horizontal vibration due to an earthquake or the like ends, the vibration can be quickly converged. Particularly, since two damping mechanisms 26 are provided separately and supported on the upper and lower sides, the relative displacement of the column member 30 ′ due to the horizontal displacement or tilting of the steel frame 22 ′ can be controlled simultaneously. Can do. Further, the response displacement of the column member 30 ′ can be further reduced by controlling the damping mechanism 26 to be active (active) by computer control.

  The preferred embodiment 1 and embodiment 2 of the present invention have been described above. However, the present invention is not limited to these, and various modifications can be made. For example, in the first and second embodiments described above, the strut members 30 and 30 'are attenuated by using the damping mechanism 26 such as an oil damper. However, in the present invention, the strut member (antenna) The deformation (tilt angle) may be detected by a sensor to control the oil damper.

  Moreover, in this invention, you may make it cover the support | pillar member containing an antenna, more specifically the part which protrudes upwards from a steel-frame frame part with the cover member for windshields fixed only to the tower main body. According to such a configuration, for example, it is possible to eliminate the influence of a wind such as during a typhoon, and it is possible to set only the earthquake response as a deformation suppression target.

  As described above, the deformation suppressing structure for a tower-like structure according to the present invention is useful for a tower-like structure that supports an antenna of, for example, a television, satellite communication, or a mobile phone.

It is the side view which showed the tower-like structure to which the deformation | transformation suppression structure in Embodiment 1 of this invention was applied. It is the cross-sectional side view which expanded and showed the principal part of the tower-like structure to which the deformation | transformation suppression structure in Embodiment 1 of this invention was applied. FIG. 3 is a model diagram schematically showing the state of FIG. 2. It is the schematic diagram which showed typically the steel frame frame part in FIG. 2, a support | pillar member, and a receiving member. It is the schematic diagram which showed typically the steel frame frame part in FIG. 2, a support | pillar member, and a receiving member. It is the schematic diagram which showed typically the steel frame frame part in FIG. 2, a support | pillar member, and a receiving member. It is the cross-sectional side view which expanded and showed the principal part of the tower-like structure to which the deformation | transformation suppression structure in Embodiment 2 of this invention was applied. FIG. 8 is a model diagram schematically showing the state of FIG. 7. It is the schematic diagram which showed typically the steel frame frame part in FIG. 7, a support | pillar member, and a receiving member. It is the schematic diagram which showed typically the steel frame frame part in FIG. 7, a support | pillar member, and a receiving member. It is the schematic diagram which showed typically the steel frame frame part in FIG. 7, a support | pillar member, and a receiving member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Communication tower 11 Underground base 20,20 'Tower main body 21 RC cylinder 21a Lower RC part 21b Middle RC part 21c Upper RC part 22 Steel frame part 23 Upper end face 24 Open hole 25 Intermediate beam 26 Damping mechanism (damper)
30, 30 'support member 31, 31' support piece 32, 32 'support surface 40, 50 receiving member 41, 51 lower surface 42, 52 upper surface 43, 53 through hole

Claims (5)

In the deformation suppressing structure that suppresses deformation of the top of the tower-like structure having a column member that supports the object and a long structure body that supports the column member at the top via a receiving member,
The accepting member normally positions the center axis of each of the structure main body and the column member on the same straight line in the vertical direction, while the structure main body is displaced or inclined in the horizontal direction, A structure for suppressing deformation of a tower-like structure, which absorbs a relative displacement of each central axis generated between a structure main body and the column member.   The receiving member includes a first smooth surface that slides between a top portion of the structure body and a second smooth surface that slides between the support members when the structure body is displaced or tilted in a horizontal direction. The deformation suppressing structure for a tower-like structure according to claim 1, comprising: The upper end surface of the structure main body has a concave spherical shape gradually dented from the outer peripheral portion toward the central portion,
The support surface formed on the support member has a concave spherical shape gradually dented from the outer peripheral portion toward the central portion,
The first smooth surface protrudes gradually downward from the outer peripheral portion toward the center portion and has a convex spherical shape having a curvature substantially equal to the upper end surface, while the second smooth surface is formed from the outer peripheral portion. The tower-like structure deformation suppressing structure according to claim 2, wherein the tower-like structure has a convex spherical shape that gradually protrudes upward toward a central portion and has a curvature substantially equal to the support surface. The upper end surface of the structure body has a convex spherical shape that gradually protrudes upward from the outer peripheral portion toward the central portion,
The support surface formed on the support member has a convex spherical shape that gradually protrudes downward from the outer peripheral portion toward the center portion,
The first smooth surface has a curvature substantially equal to the upper end surface and has a concave spherical shape gradually dented from the outer peripheral portion toward the center portion, while the second smooth surface is 3. The deformation suppression of a tower-like structure according to claim 2, wherein the tower-like structure has a curvature substantially equal to that of the support surface, and has a concave spherical shape gradually dented from the outer peripheral portion toward the central portion. Construction.   The said support | pillar member approached the inside of the said structure main body in the aspect which penetrated the through-hole formed in the said receiving member in the lower end part, and is supported through the damping mechanism. The deformation | transformation suppression structure of the tower-like structure as described in any one of these.

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