JP6148045B2 - Double-sided slide support device for structures - Google Patents

Description

  The present invention relates to a double-sided slide support device for a structure installed between an upper structure and a lower structure of a structure such as a building or a bridge. The present invention relates to a double-sided slide bearing device for a structure that absorbs by a relative displacement in the horizontal direction perpendicular to each other through the upper and lower sliding surfaces, and absorbs by compressing and deforming an elastic body against the vertical displacement in the vertical direction.

  After the Hyogoken-Nanbu Earthquake, seismic isolation structures that reduce seismic force and improve seismic resistance through longer periods and higher damping using high-damping rubber-based seismic isolation bearings and laminated rubber bearings with lead plugs are common Has been adopted. As a function-separated type support structure, a case in which a support structure that combines a vertical load support bearing that handles a vertical load and a horizontal force distribution bearing that handles a horizontal force is increasing.

  In addition, an elastic bearing with sliding surfaces on both the upper and lower sides is placed between the upper structure and the lower structure as a seismic isolation or vibration control bearing device for the structure, and acts on the lower structure during earthquakes by the frictional force of the upper and lower sliding surfaces. There has been proposed a double-sided slide support device for a structure that reduces horizontal displacement and transmits it to an upper structure.

JP 2001-140976 A JP 2002-39266 A

  Conventional double-sided slide bearings for structures have a structure in which the upper and lower structures are relatively displaced with respect to a displacement in one horizontal direction, and do not correspond to a displacement in all horizontal directions that acts during an earthquake. In addition, it is necessary to dispose a stopper for limiting the displacement, which has a problem of a complicated configuration. In addition, for the vertical vertical displacement acting on the vertical structure during an earthquake, the elastic body compresses and absorbs the vertical downward displacement, but for the vertical upward displacement, A tensile force acts on the elastic body, and an elastic body such as rubber has a tensile allowance, so the area and thickness of the elastic body must be increased in order to cope with the tensile force acting on the elastic body. This is not preferable in the technical field of bearings for structures that are required to be made. Further, the reaction force when the upper and lower slide surfaces start to slide relative to the relative displacement at the time of the earthquake is 20-30% larger than the reaction force at the time of continuous sliding. Due to the increased reaction force at the start of sliding, the mounting bolts and the like designed by the reaction force at the time of continuous sliding are damaged, and there is a problem that the bearing is damaged without exhibiting the damper function.

  The present invention solves the problems of the prior art, has a simple structure, and is greatly attenuated by sliding of the upper and lower sliding surfaces via an elastic body against horizontal displacement in all directions acting during an earthquake. The elastic body can compress and deform and absorb the positive and negative displacements in the vertical direction acting on the upper and lower structures, and the reaction force at the start of sliding of the upper and lower slide surfaces can be reduced. An object of the present invention is to provide a double-sided slide bearing device for a possible structure.

The structure double-sided slide support device of the present invention is a double-sided slide support device for a structure that is arranged between an upper structure and a lower structure of a structure such as a building or a bridge in order to solve the above-mentioned problem, A pair of lower displacement transmission members fixed in parallel to the lower sliding member arranged on the lower structure side, and an upper sliding member arranged on the upper structure side fixed in parallel to the direction perpendicular to the lower displacement transmission member. An upper mounting plate having a pair of upper displacement transmitting members and a pair of engaging protrusions that are fixed to the upper portion of the elastic body and engage with the lower displacement transmitting member and that form the upper sliding member and the upper sliding surface When, and a lower mounting plate forming the lower sliding member and the lower slide surface is fixed to the lower have engaging projections of a pair of engaging the upper displacement transmission member of the elastic member, the lower Place the upper flange on the upper end of the displacement transmission member The upper flange portion and the upper step formed on the engaging projection of the upper mounting plate are in contact with each other to form a vertically downward displacement transmission surface, and the lower flange portion is formed at the lower end of the upper displacement transmission member. And a downward stepped portion formed on the upper surface of the lower flange portion and the engaging projection portion of the lower mounting plate is brought into contact with a vertically upward displacement transmission surface, and the vertical displacement is The elastic body is compressed and deformed and absorbed, and the upper slide surface and the lower slide surface are displaced relative to each other in the horizontal direction perpendicular to each other via the elastic body and absorb the displacement in all horizontal directions acting during an earthquake. It is characterized by that.

Further, the structure double-sided slide support device according to the present invention includes a contact surface between the lower displacement transmission member and the engagement protrusion of the upper mounting plate, or the upper displacement transmission member, the lower mounting plate, and the engagement protrusion. An elastic member is disposed between any of the contact surfaces, and a time difference is set in the slide start time of the upper slide surface or the lower slide surface with respect to the relative displacement during the earthquake.

  Further, the double-sided slide support device for a structure according to the present invention is such that the friction coefficient of the upper slide surface and the friction coefficient of the lower slide surface are set differently, and the upper slide surface or the lower slide with respect to the relative displacement during an earthquake. A time difference is set for the slide start time of the surface.

  Moreover, the double-sided slide support device for a structure of the present invention is characterized in that a friction coefficient of the upper slide surface and the lower slide surface is 0.1 to 0.15.

A double-sided slide support device for a structure, which is disposed between an upper structure and a lower structure of a structure such as a building or a bridge, and is fixed in parallel to a lower sliding member disposed on the lower structure side A lower displacement transmission member, a pair of upper displacement transmission members fixed in parallel to a direction perpendicular to the lower displacement transmission member to an upper sliding member disposed on the upper structure side, and a lower portion fixed to an upper portion of an elastic body An upper mounting plate having a pair of engaging protrusions that engage with a displacement transmitting member and forming the upper sliding member and the upper sliding surface, and fixed to a lower portion of the elastic body and engaged with the upper displacement transmitting member A lower mounting plate having a pair of engaging protrusions and forming a lower sliding member and a lower sliding surface, wherein an upper flange portion is formed at an upper end of the lower displacement transmission member, and a lower surface of the upper flange portion And formed on the engaging projection of the upper mounting plate The upper stepped portion is abutted to form a vertically downward displacement transmission surface, a lower flange portion is formed at the lower end of the upper displacement transmission member, and the upper flange portion and the engaging projection portion of the lower mounting plate are formed. The formed downward stepped part is abutted to form a vertically upward displacement transmission surface, and the elastic body is compressed and absorbed with respect to vertical displacement in the vertical direction. The upper slide surface and the lower slide surface are displaced relative to each other in the horizontal direction perpendicular to each other via the elastic body and absorb, thereby sliding the upper and lower slide surfaces through the elastic body against the displacement in the entire horizontal direction. The seismic energy can be attenuated by friction due to friction and elastic deformation of the elastic body. Further, it is possible to reduce the amount of horizontal displacement transmitted to the upper structure by causing the horizontal displacement acting on the lower structure during an earthquake to be displaced in the opposite direction by the upper and lower fixing portions of the elastic body. In the event of an earthquake, any displacement in the vertical direction acting on the vertical structure will be absorbed by the compressive deformation of the elastic body, so there is no need to pay attention to the allowable tensile value of the rubber that constitutes the elastic body. It is possible to realize a reduction in size and thickness.
An elastic member is arranged between the contact surface between the lower displacement transmission member and the engaging projection of the upper mounting plate, or between the contact surface of the upper displacement transmission member, the lower mounting plate and the engaging projection, and the earthquake. By setting a time difference in the slide start time of the upper slide surface or the lower slide surface with respect to the relative displacement at the time, it becomes possible to suppress the initial reaction force at the time of the earthquake of the double slide method.
By setting the friction coefficient of the upper slide surface and the friction coefficient of the lower slide surface to be different, and setting the time difference in the slide start time of the upper slide surface or the lower slide surface with respect to the relative displacement at the time of earthquake, double-sided slide method It is possible to keep the initial reaction force at the time of the earthquake low.
By setting the friction coefficient of the upper slide surface and the lower slide surface to 0.1 to 0.15, it is possible to keep the initial reaction force at the time of an earthquake of the double slide method low.

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  An embodiment of a double-sided slide support device 1 for a structure according to the present invention will be described with reference to the drawings. FIG. 1 is a side view seen from one direction of a double-sided slide support device 1 for a structure of the present invention, and FIG. 2 is a side view seen from a right angle direction of one direction.

  The double-sided slide support device 1 for a structure is disposed between the lower structure 2 and the upper structure 3. The lower sliding member 5 is fixed to the lower structure 2 by anchor bolts 4 embedded in the lower structure 2. An upper sliding member 7 is fixed to the upper structure 3 by a set bolt 6. The lower sliding member 5 and the upper sliding member 7 are made of stainless steel having a small friction coefficient.

  As shown in FIGS. 3A, 3B, and 3C, a pair of lower displacement transmission members 8 are fixed to the lower sliding member 5 in parallel by a fixing bolt 9 with an interval L1. The lower displacement transmission member 8 may be fixed to the lower sliding member 5 by welding. The lower displacement transmission member 8 has a lateral width of L2, and upper flange portions 8a extending in the lateral direction are formed on both side ends of the upper end portion thereof. The lower displacement transmission member 8 has a planar front surface portion 8b and a side surface portion 8c.

  As shown in FIGS. 4A and 4B, a pair of upper displacement transmission members 10 are fixed to the upper sliding member 7 in parallel in a direction perpendicular to the lower displacement transmission member 8 with a spacing L3 by a fixing bolt 11. The The upper displacement transmission member 10 may be fixed to the upper sliding member 7 by welding. The upper displacement transmission member 10 has a lateral width of L4, and a lower flange portion 10a extending in the lateral direction is formed on both side ends of the upper end portion thereof. Moreover, the upper displacement transmission member 10 has a planar front surface portion 10b and a side surface portion 10c.

  An elastic body 12 is disposed between the lower sliding member 5 and the upper sliding member 7. As shown in FIG. 5, the elastic body 12 is a laminated rubber in which a plurality of rubbers and reinforcing steel plates are alternately laminated. An upper connecting steel plate 13 and a lower connecting steel plate 14 are arranged above and below the elastic body 12 by vulcanization integral molding. The elastic body 2 may be a high-damping rubber other than the laminated rubber, or a laminated rubber containing a lead plug in which a lead plug is inserted into the laminated rubber.

  An upper mounting plate 15 is fixed to the upper connecting steel plate 12 by fixing bolts 16. As shown in FIG. 6, a pair of engaging protrusions 15a are formed at intervals L5 at both lateral ends of the upper mounting plate 15. The lateral length of the upper mounting plate 15 excluding the engaging protrusion 15a is L6. As shown in FIG. 7, an upward stepped portion 15b is formed in the engaging projection 15a. A fixing bolt insertion hole 15 c for inserting the fixing bolt 16 is formed in the upper mounting plate 15, and a large-diameter portion that accommodates the head of the fixing bolt 16 is formed above the fixing bolt insertion hole 15 c. By forming the large diameter portion in the fixing bolt insertion hole 15 c, the head of the fixing bolt 16 does not protrude from the upper surface of the upper mounting plate 15 when fixing with the fixing bolt 16. Since the upper surface of the upper mounting plate 15 forms the upper sliding member 7 and the upper sliding surface, the upper mounting plate 15 is formed of polished stainless steel with a surface having a small friction coefficient, or low friction such as tetrafluoroethylene on the upper surface. Install the material.

  A lower mounting plate 17 is fixed to the lower connecting steel plate 14 with fixing bolts 18. As shown in FIG. 6, a pair of engaging protrusions 17a are formed at intervals L7 at both ends of the lower mounting plate 17 in the lateral direction. The direction of the engaging protrusion 17a is a direction orthogonal to the direction of the engaging protrusion 15a. The lateral length of the lower mounting plate 17 excluding the engaging projection 17a is L8. As shown in FIG. 8, a downward stepped portion 17b is formed in the engaging projection 17a. A fixing bolt insertion hole 17c for inserting the fixing bolt 18 is formed in the lower mounting plate 17, and a large-diameter portion that accommodates the head of the fixing bolt 18 is formed below the fixing bolt insertion hole 17c. By forming the large-diameter portion in the fixing bolt insertion hole 17 c, the head of the fixing bolt 16 does not protrude from the lower surface of the lower mounting plate 17 when fixing with the fixing bolt 18. Since the lower surface of the lower mounting plate 17 forms the lower sliding member 5 and the lower sliding surface, the lower mounting plate 17 is formed of polished stainless steel with a small friction coefficient, or a low friction material such as tetrafluoroethylene on the lower surface. Is installed.

  The engagement state of the upper mounting plate 15 and the lower displacement transmission member 8 will be described with reference to FIGS. The distance L1 between the pair of parallelly arranged lower displacement transmission members 8 and the length L6 excluding the engaging protrusion 15a of the upper mounting plate 15 are substantially the same length, and between the pair of engaging protrusions 15a. The interval L5 is substantially the same length as the lateral length L2 of the lower displacement transmitting member 8. As a result, the side portion 15d between the engaging projections 15a of the upper mounting plate 15 contacts the front surface portion 8b of the lower displacement transmission member 8. The inner side surfaces of the pair of engaging projections 15a are in contact with the side surface portions 8c of the lower displacement transmission member 8 to form a displacement transmission surface Z for relative displacement in the XX direction. With respect to the relative displacement in the Y-Y direction, the side portion 15c between the engaging projections 15a of the upper mounting plate 15 abuts against the front surface portion 8b of the lower displacement transmitting member 8 to prevent it. An upward step 15b of the engaging projection 15a abuts below the upper flange 8a. As shown in FIG. 9B, the upper surface of the upper flange portion 8 a is located below the upper surface of the upper mounting plate 15. The contact surface between the upper flange portion 8a and the upward step portion 15b serves as a transmission surface for relative displacement in the vertical direction.

  The engagement state of the lower mounting plate 17 and the upper displacement transmission member 10 will be described with reference to FIGS. The distance L3 between the pair of upper displacement transmitting members 10 arranged in parallel and the length L8 excluding the engaging protrusion 17a of the lower mounting plate 15 are substantially the same length, and between the pair of engaging protrusions 17a. The interval L7 is substantially the same length as the lateral length L4 of the upper displacement transmitting member 10. As a result, the side portion 17 c between the engaging projections 17 a of the lower mounting plate 17 abuts on the front surface portion 10 b of the upper displacement transmission member 10. The inner side surfaces of the pair of engaging projections 17a are in contact with the side surface portion 10c of the upper displacement transmission member 10 to form a displacement transmission surface W for relative displacement in the Y-Y direction. The side portion 17c between the engaging projections 17a of the lower mounting plate 17 abuts against the front surface portion 10b of the upper displacement transmission member 10 to prevent relative displacement in the XX direction. A downward stepped portion 17b of the engaging projection 17a abuts on the lower flange portion 10a. As shown in FIG. 10B, the lower surface of the lower flange portion 10 a is located above the lower surface of the lower mounting plate 17. The contact surface between the lower flange portion 10a and the downward stepped portion 17b serves as a transmission surface for relative displacement in the vertical direction.

  The case where a horizontal force acts on the double-sided slide support device 1 for structures will be described with reference to FIG.

  The double-sided slide support device 1 for a structure of the present invention can cope with horizontal stress in all directions by being attached to the upper and lower structures 3 and 2 as described above. During the earthquake, the horizontal force acting on the lower structure 2 is transmitted through the pair of engaging projections 15a of the upper mounting plate 15, the side wall portion 8c of the lower displacement transmission member 8, and the displacement transmission surface Z, and the upper sliding member. 7 and slid in the XX direction via the upper sliding surface between the upper mounting plate 15 and the upper mounting plate 15. The horizontal force in the Y-Y direction is prevented because the side portion 15c between the engaging projections 15a of the upper mounting plate 15 is in contact with the front surface portion 8b of the lower displacement transmission member 8. Further, the horizontal force acting on the lower structure 2 is transmitted to the elastic body 12 to which the upper mounting plate 15 is fixed.

  In the case of a normal elastic bearing, the upper and lower sides of the elastic body 12 are deformed in the same direction when a horizontal force is applied. The double-sided slide support device 1 for a structure according to the present invention is such that the upper slide surface between the upper mounting plate 15 fixed on the elastic body 12 and the upper sliding member 7 can only slide in the XX direction. The lower sliding surface between the lower mounting plate 17 and the lower sliding member 5 fixed below 12 is mounted so that only sliding in the YY direction is possible, so that the X− transmitted to the upper portion of the elastic body 12 is transmitted. The horizontal force in the X direction is converted into the displacement YY direction in the reverse direction with the central portion of the elastic body 12 as a boundary, and the lower slide between the lower mounting plate 17 and the lower sliding member 5 fixed to the lower portion of the elastic body 12. It slides in the direction opposite to the sliding direction of the upper slide surface through the surface.

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Since the displacement direction of the upper mounting plate 15 fixed to the upper portion of the elastic body 12 and the displacement direction of the lower mounting plate 17 fixed to the lower portion of the elastic body 12 are opposite directions, the horizontal displacement transmitted to the upper structure 3 is reversed. The amount is greatly reduced because the horizontal displacement of the upper mounting plate 15 is subtracted. Furthermore, it becomes possible to attenuate the energy by the friction accompanying the slide on the upper slide surface and the lower slide surface.

  In the case of double-sided slide support, a large initial reaction force is generated when the upper slide surface and the lower slide surface start to slide simultaneously due to the horizontal force applied during an earthquake. Due to the increased reaction force at the start of sliding, the mounting bolts and the like designed by the reaction force at the time of continuous sliding are damaged, and there is a problem that the bearing is damaged without exhibiting the damper function.

  As one means for solving this problem, the friction coefficient between the upper slide surface and the lower slide surface is made as small as possible. The upper mounting plate 15 and the upper sliding member that form the upper slide surface are formed of polished stainless steel with a small friction coefficient, or a low friction material such as ethylene tetrafluoride is installed on the surface. 1 to 0.15. By reducing the coefficient of friction between the upper slide surface and the lower slide surface, it is possible to keep the initial reaction force small even if the slides start simultaneously on both slide surfaces in the event of an earthquake.

  Another means of suppressing the initial reaction force is to provide a time difference in the slide start time during the earthquake between the upper slide surface and the lower slide surface. As one method of giving a time difference to the slide start time, the friction coefficient of the upper slide surface and the lower slide surface is set to be different. By setting the friction coefficient between the upper slide surface and the lower slide surface to be different from each other, it is possible to suppress the initial reaction force by providing a time difference in the slide start time.

  11A and 11B, another method for providing a time difference in the slide start time at the time of the earthquake between the upper slide surface and the lower slide surface will be described. Any one of the displacement transmission surface Z between the lower displacement transmission member 8 and the engagement projection 15a of the upper mounting plate 15 or the displacement transmission surface W between the upper displacement transmission member 10 and the engagement projection 17a of the lower mounting plate 17 By interposing the elastic member 19, the time difference between the slide start time at the time of the earthquake between the upper slide surface and the lower slide surface can be given, and the initial reaction force can be kept small. As the elastic member 19, resin, rubber or the like is used. A deformable metal such as lead may be used.

  A case where vertical displacement in the vertical direction acts on the double-sided slide support device 1 for a structure will be described.

  In the case of a normal elastic bearing, when a vertically upward displacement is applied, a tensile force is applied to the elastic body. In the case of the double-sided slide bearing device 1 for a structure of the present invention, when a downward displacement in the vertical direction is applied, the relative displacement in the vertical direction is elasticized via the contact surfaces of the upper flange portion 8a and the upward step portion 15b. The elastic body 12 is compressed and deformed and absorbed. When a vertical upward displacement is applied to the double-sided slide support device 1 for a structure, the vertical upward relative displacement is transmitted to the elastic body 12 via the contact surfaces of the lower flange portion 10a and the downward step portion 17b. The elastic body 12 is compressed and deformed and absorbed.

  The elastic body 12 compressively deforms and absorbs the upward displacement in the vertical direction, so that it is not necessary to pay attention to the allowable tensile value of rubber or the like constituting the elastic body 12, and the bearing can be reduced in size and thickness. It becomes possible.

  As described above, according to the double-sided slide support device for a structure of the present invention, it is possible to attenuate seismic energy due to friction by sliding through the upper and lower slide surfaces with respect to displacement in the entire horizontal direction. In addition, the initial reaction force in the double-sided slide support can be kept low. Furthermore, it is possible to reduce the amount of horizontal displacement transmitted to the upper structure by causing the horizontal displacement acting on the lower structure 2 during an earthquake to be displaced in the opposite direction by the upper and lower fixing portions of the elastic body. In addition, in the event of an earthquake, any displacement in the vertical direction acting on the vertical structure is absorbed by the compressive deformation of the elastic body, so there is no need to pay attention to the allowable tensile value of the rubber that constitutes the elastic body. Therefore, it is possible to reduce the size and thickness of the bearing.

  1: double-sided slide support device for structure, 2: lower structure, 3: upper structure, 4: anchor bolt, 5: lower sliding member, 6: set bolt, 7: upper sliding member, 8: lower displacement transmission member, 8a : Upper flange part, 8b: front part, 8c: side part, 9: fixing bolt, 10: upper displacement transmission member, 10a: lower flange part, 10b: front part, 10c: side part, 11: fixing bolt, 12: Elastic body, 13: upper connecting steel plate, 14: lower connecting steel plate, 15: upper mounting plate, 15a: engaging projection, 15b: upward stepped portion, 15c: fixing bolt insertion hole, 15d: side portion, 16: fixing Bolt, 17: lower mounting plate, 17a: engaging projection, 17b: downward stepped portion, 17c: fixing bolt insertion hole, 17d: side portion, 18: fixing bolt, 19: elastic member

Claims (4)

A double-sided slide support device for a structure that is arranged between an upper structure and a lower structure of a structure such as a building or a bridge,
A pair of lower displacement transmission members fixed in parallel to the lower sliding member disposed on the lower structure side;
A pair of upper displacement transmission members fixed in parallel to a direction perpendicular to the lower displacement transmission member to an upper sliding member disposed on the upper structure side;
An upper mounting plate that is fixed to the upper part of the elastic body and has a pair of engaging protrusions that engage with the lower displacement transmission member and forms the upper sliding member and the upper sliding surface;
A lower mounting plate having a pair of engaging protrusions fixed to a lower portion of the elastic body and engaged with the upper displacement transmission member, and forming a lower sliding surface with the lower sliding member;
With
An upper flange portion is formed at the upper end of the lower displacement transmission member, and an upward stepped portion formed on the lower surface of the upper flange portion and the engaging projection portion of the upper mounting plate is brought into contact to form a vertically downward displacement transmission surface. A lower flange portion is formed at the lower end of the upper displacement transmission member, and a vertical step-up displacement transmission surface is brought into contact with the upper step surface of the lower flange portion and the downward stepped portion formed on the engaging projection portion of the lower mounting plate. The elastic body is compressed and absorbed with respect to vertical displacement in the vertical direction, and the upper slide surface and the lower slide surface are interposed through the elastic body with respect to displacement in all horizontal directions acting during an earthquake. A double-sided slide support device for a structure, which absorbs by being displaced relative to each other in a horizontal direction perpendicular to each other. An elastic member is provided between the contact surface between the lower displacement transmission member and the engagement protrusion of the upper mounting plate, or between the contact surfaces of the upper displacement transmission member, the lower mounting plate and the engagement protrusion. 2. The double-sided slide support device for a structure according to claim 1, wherein a time difference is set in the slide start time of the upper slide surface or the lower slide surface with respect to relative displacement during an earthquake.   The friction coefficient of the upper slide surface and the friction coefficient of the lower slide surface are set differently, and the time difference is set in the slide start time of the upper slide surface or the lower slide surface with respect to the relative displacement at the time of the earthquake, The double-sided slide support device for a structure according to claim 1.   The double-sided slide support device for a structure according to any one of claims 1 to 3, wherein a friction coefficient of the upper slide surface and the lower slide surface is set to 0.1 to 0.15.

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