JP4631280B2 - Seismic control pier - Google Patents

Description

  The present invention relates to a vibration control pier having a vibration control effect on the pier itself.

  The seismic isolation method for the bridge structure is mainly to give the bearing structure seismic isolation effect. On the other hand, the pier according to the present invention is not a seismic isolation method using a device typified by a seismic isolation bearing, but a new pier structure incorporating a seismic control effect in the structure of the pier itself that is easily damaged by an earthquake.

  As prior art documents in which such a bridge pier itself has a seismic control effect, there are, for example, Patent Document 1 and Patent Document 2. The invention of Patent Document 1 is a vibration control structure of a bridge. A bridge girder is supported by a truss assembly pier, a damper for suppressing truss deformation during bridge vibration is incorporated in the truss assembly pier, and a bridge girder in the vicinity of this truss assembly pier. Is supported by a narrow bridge pier with a movable support only for vertical loads. The invention of Patent Document 2 is an earthquake-resistant bridge in which an oil damper or a viscous damper that resists relative deformation is obliquely arranged inside a pier partitioned by a plurality of diaphragms for maintaining a cross section.

Further, as prior art documents related to the present invention, there are, for example, Patent Document 3 and Patent Document 4. The invention of Patent Document 3 is a seismic reinforcement structure for a ramen bridge. In a frame surrounded by bridge piers on both sides rising from the foundation and girders of the superstructure, a stiffener and steel elastic-plastic as an energy absorber A damper (honeycomb damper) is installed. The invention of Patent Document 4 is a vibration control structure of a megastructure frame joined to a building, in which a damper unit is incorporated into a megastructure frame composed of mega columns, mega beams, and mega braces via braces.
Japanese Patent Laid-Open No. 5-140911 Japanese Patent Laid-Open No. 9-296413 JP-A-10-298916 Japanese Patent No. 3260473

  In the case of the inventions of Patent Documents 1 and 2, in which a conventional pier itself has a seismic control effect, it is necessary to construct a truss assembly pier with a special structure or a pier with a built-in diaphragm, and a thin pier with a movable support is separately provided. It is necessary to adopt a seismic isolation method to increase the natural period.

  The present invention is a new pier structure that incorporates the vibration control effect into the structure of the pier itself that is easily damaged by an earthquake, and by incorporating a vibration control device into the pier of the column structure or the wall structure, The objective is to provide a seismic control pier that can reliably reduce seismic force with a relatively simple pier structure.

Claim 1 of the present invention provides a truss having a truss rating in the center between columns or walls as a chord material by connecting a single pier with a plurality of columns or walls with a truss material as an abdomen. It is a bridge pier of a column structure or a wall structure that has a long period by being configured, and the truss material between the columns or walls constituting the single pier is vertically arranged at the center between the columns or between the walls. A seismic control device that absorbs energy by relative displacement at the truss rating points is arranged so that the relative displacement is in the vertical direction. by connecting the truss member is a seismic control piers, characterized in that which gave Damping function pier itself.

  The first aspect of the present invention is applied to a truss having a truss rating in the center between columns or walls as a chord material, such as a double warren truss, and a case where a vibration control device is incorporated in the truss rating at the center. Is done. Truss materials as left and right abdomen are attached to each of the members that are relatively displaced in the vertical direction of the vibration control device.

Claim 2 of the present invention, a single piers, a plurality of pillars or walls as the chord, formed by long period of by configuring truss connected by truss members as web members set Column structure or set A pier with a wall structure, and a truss member and a column or wall are arranged at a plurality of truss rating points that are continuous in the vertical direction along the column or wall. Separating and arranging the vibration control device that absorbs energy by relative displacement to the truss rating point so that the relative displacement is in the vertical direction, and connecting the diagonal and the column or wall with this vibration control device, It is a seismic control pier characterized by having a seismic control function on the pier itself.

  The second aspect of the present invention is applied to a case where a vibration control device is incorporated in a column or wall truss rating as a chord member in, for example, a single warren truss or a double warren truss. Each member that is relatively displaced in the vertical direction of the vibration control device is attached to a truss material as a belly and a column or wall.

Claim 3 of the present invention is a column structure in which a single pier is constructed by connecting a plurality of columns or walls in a vertically dotted manner or by connecting them with a panel that is continuous in the vertical direction to make a long period of time. Or, it is a bridge pier with a wall structure, and the panels between the columns or walls constituting the single pier are separated into left and right between the columns or walls, and energy is absorbed by relative displacement between the separated left and right panels. A number of seismic control devices are installed so that the relative displacement is in the vertical direction, and the left and right panels are connected by this seismic control device, so that the pier itself has a seismic control function. It is an earthquake pier.

  This claim 3 is a case where a panel made of concrete or steel is used instead of a truss, and the panel is integrally projected to a pair of opposing pillars and walls, respectively, facing the opposing pillars and walls, The pair of panels are connected by a vibration control device at the center between columns or walls. In the vertical direction, a plurality of panels may be arranged in a dotted manner, or a panel that is continuous in the vertical direction may be used.

Claim 4 of the present invention is a column structure in which a single bridge pier is constructed by connecting a plurality of columns or walls in a vertically dotted manner or by connecting them with a panel that is continuous in the vertical direction to make a long period of time. Or a bridge pier with a built-in wall structure, and the panel between the columns or walls constituting the single pier is separated from the column or wall, and energy is absorbed by relative displacement between the separated panel and the column or wall. A number of seismic control devices are installed so that the relative displacement is in the vertical direction, and the pier itself has a seismic control function by connecting panels and columns or walls with this seismic control device. It is a seismic control pier.

  This claim 4 is also a case where a panel made of concrete or steel is used in place of the truss, and either or both sides of the panel between the columns or between the walls are separated from the columns or walls, and separated from the columns or walls. Connect the panel with the seismic control device. Also in this case, in the up-down direction, a plurality of panels may be arranged in a dotted manner, or a panel continuous in the up-down direction may be used.

According to a fifth aspect of the present invention, in the vibration control pier according to any one of the first to fourth aspects, the vibration control device includes a steel elastic-plastic damper (such as a honeycomb damper made of mild steel), an oil damper, a viscous damper. A seismic control pier characterized by an elastic damper, a friction damper, a lead damper, or a laminated rubber (normal type, containing lead, high damping, etc.).

  The present invention is passive vibration control, and a passive vibration control device that attenuates or absorbs energy by relative displacement of members can be used. In addition, this seismic control device is installed only on trusses and panels in the direction of the bridge axis, only on trusses and panels in the direction perpendicular to the bridge axis, and on trusses and panels in both directions perpendicular to the bridge axis as necessary. can do. Moreover, regarding the up-down direction, you may arrange | position to all the truss grades etc., and may arrange | position to the truss grades etc. of a required part.

  According to the present invention as described above, the bridge pier of the column structure or the wall structure using the truss, the panel or the like is separated into the left and right, and the seismic control device in which the relative displacement, that is, the energy absorption is vertical in the separated part. As a result, the horizontal displacement of the column or wall at the time of the earthquake is converted into a vertical displacement at the separation part, and the seismic energy is absorbed by the vertical displacement of the seismic control device installed in this part. The seismic force is reduced. In addition, since the column structure or the wall structure is originally a flexible structure and can have a long period, a reduction in seismic force can also be expected.

  Since the seismic control pier of the present invention is configured as described above, it has the following effects.

  (1) The pier of the column structure or the wall structure using trusses, panels, etc. is separated into the left and right, and the pier itself itself because the segregation device with relative displacement, that is, energy absorption, is installed in the vertical direction. Therefore, the seismic force can be surely reduced.

  (2) Since it is only necessary to install a vibration control device on the column or wall without constructing a special pier as in the past, a pier structure that can reduce the seismic force reliably and easily is low-cost. Can be obtained at

  (3) Since the columns and walls are flexible and can be extended in period, it is possible to eliminate the need for conventional seismic isolation methods.

  Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 is a front view showing an embodiment of a seismic control pier having a column structure according to the present invention and a deformation state at the time of the earthquake. FIG. 2 is a perspective view showing a specific example thereof. FIG. 3 is a front view showing another embodiment of the seismic control pier having a column structure according to the present invention. FIG. 4 is a plan view showing an embodiment of a seismic control pier having a wall structure according to the present invention. FIG. 5 is a plan view showing various forms of the column structure.

  In the embodiment of FIG. 1, the seismic control pier 1 of the present invention is based on a column structure composed of several columns 2. In order to integrate this assembled column structure, it is necessary to connect a pair of adjacent columns with a truss. For example, a double warren truss 3 is used. In this case, a double-warren truss 3 having the pair of columns 2 as a chord material and the truss material 4 as an abdomen is formed by arranging an X-shaped truss member 4 between adjacent pairs of columns. .

  In this double warren truss 3, truss rating points a between the abdominal materials are arranged in the center between the columns 2 and 2 continuously in the vertical direction, and the truss 3 is left and right at the truss rating points continuous in the vertical direction. The seismic control device 5 that attenuates or absorbs energy by the relative displacement at each truss rating point a is incorporated so that the relative displacement is in the vertical direction, and the left and right trusses 3A and 3B are connected by this seismic control device 5. And unite. Note that the truss rating of the chord material and the belly material is in, for example, the pillar 2, and the end of the truss material 4 is embedded or joined to the pillar 2 made of concrete, steel, steel-concrete composite structure, or the like.

  As shown in Fig. 1 (b), due to the truss structure separated as described above, the horizontal displacement of the column pier at the time of the earthquake becomes the vertical displacement at the location of the truss rating point a, and the relative displacement in that part By arranging the vibration control device 5 in the vertical direction, the vibration control device 5 exhibits a vibration control effect due to its energy absorption capability, and the seismic force is reduced. In addition, since the column structure is originally a flexible structure and can be made to have a long period of time, it can be expected to reduce seismic force.

  In addition, although embodiment of this FIG. 1 illustrated about the case where the double warren truss 3 is used, it is not restricted to this, The other truss which has the truss rating point of abdominal material in the center between string materials can be used.

  The damping device 5 is preferably a honeycomb damper made of mild steel that exhibits a damping effect by shear deformation, but any device can be used as long as it provides a damping effect by relative displacement. is there. For example, cylinder-type oil dampers equipped with pressure regulating valves, viscoelastic dampers that use the viscous resistance force of viscoelastic bodies, friction dampers that use frictional force, lead dampers, regular type, leaded, high damping laminated rubber There are passive vibration control devices.

  Such a vibration control device 5 may be arranged at all the truss rating points a, or may be arranged only at the truss rating points a of necessary parts such as the upper part. In addition, it is built into a truss in the direction of the bridge axis or perpendicular to the bridge axis, but by combining it in both directions of the bridge axis and the bridge axis, the structure can exhibit a seismic control effect against earthquakes in both directions.

  In the specific embodiment of FIG. 2, the damping device 5 is arranged in a truss structure in a bridge axis direction and a direction perpendicular to the bridge axis in a column structure with four columns 2, and a honeycomb damper is used for this damping device. ing. The honeycomb damper is provided with attachment plates 7 on both sides of a mild steel plate 6 processed into a honeycomb shape, and the ends of the truss members 4 are attached to the attachment plates 7. As a result, relative displacement, that is, shear deformation occurs in the vertical direction.

  The embodiment of FIG. 3 is a case where a single warren truss 8 is used. In this case, since the truss rating points b are scattered in the vertical direction along the pillars 2, the truss rating continuous in the vertical direction is provided. The truss 8 and the column 2 are separated at the point position, and the vibration control device 5 is incorporated in each truss rating point b of the column 2 so that the relative displacement thereof is in the vertical direction. And the truss 8 are connected and integrated. Other configurations are the same as those of the embodiment of FIG. The effect is the same as that of the embodiment of FIG. 1 except that the vibration control is performed on both sides of the truss.

  In addition, although the embodiment of FIG. 3 illustrated the case where the single warren truss 8 is used, the double warren truss 3 or any other truss is used in order to arrange the vibration control device at the truss rating of the chord material and the abdomen. Can do.

  The embodiment of FIG. 4 is a seismic control pier with a combined wall structure in which a plurality of walls 9 arranged in parallel are connected by a plurality of trusses. In the illustrated example, two walls 9 are arranged in parallel to the direction perpendicular to the bridge axis, and are connected by four double warren trusses 3 parallel to the bridge axis direction. A single warren truss 8 or the like can also be used. The number and direction of the walls are not limited to the illustrated example. Other configurations and operational effects are the same as those of the embodiment of FIGS.

  In the embodiment of FIG. 5, the horizontal cross-sectional shape of the column structure is changed. In FIG. 5 (a), the three columns 2 form a triangular cross-section column, and the number of columns, trusses, and damping devices We are trying to reduce it. In FIG. 5 (b), it is applied to a case where a rectangular cross-section column is composed of six columns 2 and the width of the bridge girder is large. Similarly, the assembled wall structure may have various cross sections.

  Furthermore, it can also be set as the assembled column structure and assembled wall structure which do not use the above truss members. FIG. 6 shows a case where a concrete panel is used instead of the truss member, and a trapezoidal concrete panel 10 in a side view projecting toward the opposite column 2 is integrally formed on the opposing surfaces of a pair of opposing columns 2 and 2. The pair of concrete panels 10 and 10 are connected and integrated by the vibration control device 5 at the center between the columns.

  The concrete panel 10 has a trapezoidal shape in which the width is narrowed toward the vibration control device 5, and is arranged in the vertical direction like the truss member. However, the present invention is not limited thereto, and may be a concrete panel having a quadrangular shape in a side view, or a vertically long concrete panel that is continuous in the vertical direction. Further, the panel is not limited to concrete but may be made of steel or the like. The vibration control device 5 has the same structure as that of the truss, and may be arranged at all panel connection points in the vertical direction as in the case of the truss, or only at a necessary portion such as the upper part. May be.

  Similarly to the case of the truss, the concrete panel 10 can be separated from the pair of pillars 2 or the one pillar 2, and the concrete panel 10 and the pillar 2 can be connected by the vibration control device 5. In addition, although the above is a case where a concrete panel is used for the bridge pier of a column structure, it is applicable similarly to the bridge pier of a wall structure.

  Needless to say, the present invention is not limited to the illustrated examples.

It is one Embodiment of the seismic control pier of the column structure of this invention, (a) is a front view, (b) is a schematic front view which shows the deformation | transformation condition at the time of an earthquake. It is a perspective view which shows the specific example of FIG. It is a front view which shows other embodiment of the seismic control pier of the column structure of this invention. It is a top view which shows one Embodiment of the seismic control pier of the assembled wall structure of this invention. It is a top view which shows the various form of the assembly pillar structure of this invention. Ru perspective view showing an embodiment of a Kumibashira structure using a panel instead of the truss of the present invention.

Explanation of symbols

1 ... Dam control pier 2 ... Pillar 3 ... Double warren truss 4 ... Truss material 5 ... Damping device 6 ... Mild steel plate 7 ... Mounting plate 8 ... Single warren truss 9 ... Wall 10 ... concrete panel

Claims (5)

The single piers, a plurality of pillars or walls, with the long periodic by configuring the truss in the center pillar or between walls of the chord coupled with truss member is truss rated point as web members comprising a bridge pier set pillar structure or Kumikabe structure, a plurality of truss price point successive locations in the vertical direction truss member of the pillars or between the walls constituting the single pier in the middle of Hashirakan or walls With the seismic device that absorbs energy by relative displacement at the truss rating point, the relative displacement is in the vertical direction, and the left and right truss members are connected by this seismic control device, Seismic control pier characterized by having seismic control function on the pier itself. The single piers, a plurality of pillars or walls as the chord, a bridge pier set pillar structure or Kumikabe structure formed by long period of by linked truss member as web members constituting the truss, the separated into a truss member and the bar or wall in a plurality of truss price point successive locations in the vertical direction along the column or between walls of the truss constitute a single pier pillar or wall, the truss price point A seismic control device that absorbs energy by relative displacement is arranged so that the relative displacement is in the vertical direction, and the pier itself has a seismic control function by connecting diagonal members and columns or walls. Seismic control pier characterized by It is a pier with a column structure or a wall structure that has a long period by configuring a single pier with a plurality of columns or walls interspersed in the vertical direction or connected with panels that are continuous in the vertical direction . , A panel between the columns or walls constituting the single pier is separated left and right between the columns or walls, and a seismic control device that absorbs energy by relative displacement between the separated left and right panels. A seismic control pier characterized by having a seismic control function on the pier itself by connecting multiple left and right panels with this control system. It is a pier with a column structure or a wall structure that has a long period by configuring a single pier with a plurality of columns or walls interspersed in the vertical direction or connected with panels that are continuous in the vertical direction . Separating the panel between the columns or walls constituting the single pier from the column or wall, and relative to a seismic control device that absorbs energy by relative displacement between the separated panel and the column or wall. A seismic control pier characterized by having a seismic control function on the pier itself by connecting multiple panels and columns or walls with this control system.   The vibration control pier according to any one of claims 1 to 4, wherein the vibration control device is a steel elastic-plastic damper, an oil damper, a viscoelastic damper, a friction damper, a lead damper, or a laminated rubber. Characteristic damping pier.