JP2008013347A - Seismic isolation wall connection device in facility for construction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seismic isolation wall connection device capable of suppressing influence of shear caused by earthquake vibration predicted to be applied to the wall connection device fixing a structure to a facility for construction. <P>SOLUTION: This seismic isolation wall connection device absorbs influence of the difference of shear generated between the structure and the facility for construction based on earthquake vibration by connecting the structure composed of a plurality of support members, and having a seismic isolation device installed therein, and the facility for construction such as an elevator or tower crane for construction. As the seismic isolation wall connection device, the plurality of support members are each divided into a plurality of parts in order to absorb the influence; a structure ensuring mutual displacement operation is composed by connecting the respective divided parts to one another by using connection bolts 22; and in order to generate the displacement operation by allowing movement of the connection bolt 22 when an earthquake load exceeding a preset value is applied to the support members due to earthquake vibration, a bolt hole of each connection bolt 22 is elongated, and shear pins 20 allowing shearing are mounted between the respective divided parts. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention combines a structure in which a seismic isolation device is installed with a construction facility such as a construction elevator or a tower crane, and is based on a difference in deviation generated between the structure and the construction facility based on seismic motion. The present invention relates to a seismic isolation wall connecting device that absorbs the influence.

  The mast of a tower crane, which is a construction facility to be assembled in a structure, and the guide rail of a construction elevator, etc. are connected to the structure by a device called a wall connection. If a seismic isolation device is installed in the structure, there must be a horizontal shift between the upper and lower parts of the structure where the seismic isolation device is activated by seismic motion and the construction equipment not on the seismic isolation device. Therefore, this shift cannot be absorbed by a simple wall connecting device. For this reason, construction elevators and tower cranes may be damaged. In fact, there were cases of collapse during the 1995 Hanshin-Awaji Earthquake.

  For this reason, a wall connecting device that absorbs seismic loads has been developed. For example, in the invention of Japanese Patent Application Laid-Open No. 2005-225665, a first seismic isolation that absorbs movement in one direction by providing a spring frame that can move in one direction within a horizontal plane with respect to a support frame that supports a guide rail. And a spring frame that can move in a direction perpendicular to the one direction, and a second seismic isolation portion that can absorb the movement. However, this seismic isolation wall connecting device has a complicated structure and is expensive. In addition, since the amount of displacement is small, it is difficult to obtain an effect even when applied for heavy loads.

  Japanese Patent Laid-Open No. 2001-199680 relates to a horizontal support device for a mast of a tower crane, and has a configuration in which a vibration control device is attached to a stay attached to the mast and a stay attached to a pillar of a building. What is described as a vibration control device is a well-known oil damper and a double rod type is used. However, the amount of displacement is not sufficient, and it is not cheap. Japanese Patent Laid-Open No. 2002-145580 is an example in which an oil damper is used to constitute a seismic damper device, which is considered to have the same characteristics or problems as those of the above invention.

  On the other hand, seismic and seismic control systems called brake dampers have been implemented in some areas, such as the joints between seismic elements such as columns and beams, braces, seismic walls, and frames. It has a structure in which a thin stainless steel plate and a brake material are sandwiched in pairs. When a certain amount of external force acts on the building due to strong winds or earthquakes, the joint part slips and absorbs energy by friction. Although it is said that the frictional force and restoring force characteristics by the above system are stable, the structure is complicated, the cost is not low, and it is not used as construction equipment. The obtained displacement is about 50 millimeters. Incidentally, the displacement amount in the case of Japanese Patent Application Laid-Open No. 2001-199680 using an oil damper does not exceed that, and the displacement amount of the invention of Japanese Patent Application Laid-Open No. 2005-225665 is about 30 millimeters.

JP 2001-199680 A JP 2002-145580 A JP-A-2005-225665

  The present invention has been made paying attention to the above points, and the problem is to ensure the effect of the displacement caused by the earthquake motion, which is expected to be added to the wall connecting device fixing the structure and the construction equipment. An object of the present invention is to provide a low-cost seismic isolation wall connecting device in a construction facility that can be absorbed or suppressed by action. Another object of the present invention is to provide a seismic isolation wall connecting device in a construction facility capable of obtaining a displacement amount that is twice or more larger than that of the conventional one.

  In order to solve the above-mentioned problems, the present invention combines a structure composed of a plurality of support members and provided with a seismic isolation device, and a construction facility such as a construction elevator or a tower crane, so that seismic motion can be achieved. Based on the seismic isolation wall connecting device that absorbs the effects of the difference in displacement that occurs between the structure and the construction equipment, in order to absorb the effects of the difference in displacement that occurs between the structure and the construction equipment, A plurality of support members are divided into multiple parts, and each divided part is connected with a connecting bolt to ensure mutual displacement operation. Earthquakes exceeding a preset value due to earthquake motion When a load is applied to the support member, the bolt bolt hole of the coupling bolt is elongated to enable movement of the coupling bolt and cause a displacement operation, and a shearable shear pin Attached between the divided portions is obtained by taking the means of.

  The seismic isolation wall connecting device according to the present invention is composed of a plurality of support members, and is interposed between a structure where the seismic isolation device is installed and construction equipment such as a construction elevator or a tower crane, The structure and the construction equipment are combined. That is, one seismic isolation wall connecting device is composed of a plurality of support members. And each support member shall be equipped with the mechanism which absorbs the influence based on seismic motion, and shall absorb the influence by the difference of the gap which arises between a structure and the installation for construction. Therefore, it can be said that it is similar to that using an oil damper in that it is provided on the support member.

  However, as a mechanism for absorbing the influence based on the seismic motion generated between the structure and the construction facility, the present invention divides a plurality of support members into a plurality of parts, and the parts between the divided support members. The separable parts can be moved relative to each other, and the divided parts are connected using connecting bolts, and shear pins are attached to absorb the seismic load exceeding the preset value. In addition, the structure ensures the displacement operation between the structure and the construction equipment. The joint portion and the shear pin portion formed by the joint bolt form a friction joint, and the seismic force is effectively absorbed by managing the friction, slip, and shear force in the friction joint.

  As a method of connecting the support members, it is possible to take a method of directly connecting the parts divided into a plurality of parts and a method of using a different member between the divided parts. Therefore, the support member is configured to directly connect the divided parts using a connecting bolt and attach a shear pin, or to connect using a connecting bolt via an intermediate member and attach a shear pin. (Invention of claim 2).

  In order to ensure the displacement operation between the structure and the construction equipment and to allow the relative movement of the coupling bolts when an earthquake load exceeding a preset value is applied to the support member due to the earthquake motion The bolt hole of the connecting bolt is made into a long hole, and a shearable shear pin is attached to each divided portion. The long hole and the shear pin using the coupling bolt are specific means and methods for managing friction, slip and shear force in the seismic isolation wall connecting device according to the present invention. The slot allows the joint to move when an earthquake load exceeding a preset value is applied to the friction joint, and the shear pin applies an earthquake load exceeding a preset value to the shear pin. When it is done, it breaks, and at the same time as it breaks, it allows sliding of the connecting bolt within a certain range of long holes.

  That is, when an earthquake load exceeding a preset value is applied, a slight slip occurs in the friction joint (in some designs, the difference between the shear pin and the mounting hole diameter is about 0.5 mm), and the shear force is applied to the shear pin. The shear pin breaks and a large slip occurs at the friction joint, absorbing the seismic force. It is the shear pin that controls the set value, and it is desirable that the friction bonding portion hold a load slightly smaller than the breaking load of the shear pin. However, if it is difficult to manage the frictional force, the load to be held can be set small (tightening torque is reduced), and the axial force during normal operation can be borne by the shear pin as a state where it can always slide. . Because of the function of the shear pin that bears only the shearing force, tightening with a nut is not necessary for the attachment, and a structure of a retaining degree may be used.

  More specifically, for example, when a seismic force larger than the seismic load defined in the crane structural standard and the elevator structural standard is applied to the apparatus of the present invention → initial slip occurs at the joint, that is, the friction joint → the shear pin Fracture → Friction joint slip = Seismic force absorption. Therefore, the friction and slip in the apparatus of the present invention are set by setting the fastening force according to the conditions such as the friction coefficient value for the condition for causing the initial slip in the joint portion and the condition for causing the shear pin to break. Can be managed. It should be noted that the apparatus of the present invention is not displaced and is left in a fixed state in a small input state where no deviation occurs in the upper and lower parts of the structure.

  According to the calculation performed for confirming the effect by the apparatus of the present invention, the length of the supporting member constituting the wall connecting apparatus is 640 mm, the tightening axial force by the connecting bolt is 2400 kg per bolt, and the supporting member connecting surface is When the coefficient of friction was μ = 0.35 and the applied load was 2500 kg, a displacement of 100 millimeters could be obtained. This is a value corresponding to two to three times the amount of displacement in the conventional method and apparatus, and is sufficient to prove the effectiveness of the seismic isolation wall connecting apparatus according to the present invention.

  Further, in the apparatus of the present invention, the friction adjustment is performed on the coupling portion by the coupling bolt between the divided portions of the support member, the coupling portion of the shear pin, or the coupling portion by the coupling bolt of the support member and the intermediate member, and the shear pin mounting portion. As a means, a plate-shaped adjustment plate made of metal or resin can be arranged (the invention according to claim 3). For example, when the support member and the intermediate member, when used, are formed of black steel, the friction coefficient at the coupling surface is in the range of μ = 0.2 to 0.35. However, according to the experiment, the friction coefficient between the intermediate member made of stainless steel and the ultra-high molecular weight polyethylene is μ≈0.14, which makes it easier to manage the frictional force.

  In this way, the apparatus of the present invention can achieve the intended purpose, but the following can be given as examples of specific forms and materials used. For example, an L-shaped or H-shaped metal mold material is used for the support member, and a plurality of bolts are connected to each of the L-shaped or H-shaped constituent sides so that a plurality of positions are provided at a certain position in the longitudinal direction. It is assumed that a plurality of bolt coupling portions are provided, and a displacement operation managing means is provided on the bolt coupling portions (the invention according to claim 4). In consideration of the technical field or the construction object, it is considered that the L-shaped or H-shaped metal mold material is usually used by painting a steel plate having a black skin. For friction welding, it is desirable to use at least the joint portion in a black skin state or to use after blasting. In addition, composite materials with non-ferrous metals or plastic materials can also be used. The intermediate member can be handled in the same manner, and the same material as that of each part of the divided support member or a different material is used so as to obtain a desired coefficient of friction.

  Since the present invention is configured and operates as described above, the divided portion obtained by dividing the support member is coupled using a coupling bolt at the elongated hole portion, and the coupling portion and The frictional joint consisting of the shear pin mounting part can control or manage the displacement operation between the structure and the construction equipment. When an earthquake load exceeding a preset value is applied, the structure and the construction equipment are fixed. The effect that it becomes possible to absorb or suppress the influence of the deviation accompanying the earthquake motion, which is predicted to be added to the connecting wall connecting device. Since the apparatus of the present invention is mainly composed of mold steel, coupling bolts, and shear pins, it can be implemented at a low cost and with a reliable action. Furthermore, according to the present invention, it is possible to obtain a displacement amount that is twice or more than that of the conventional one.

  Hereinafter, the seismic isolation wall connecting device according to the present invention will be described in more detail with reference to the illustrated embodiment. 1 and 2 show an example of a seismic isolation wall connecting device 10 according to the present invention. These apply in part to the various examples illustrated in FIG. Each of the square shape and the circular shape shown in FIG. 6 indicates a guide rail or a post, and both indicate a part of the construction equipment. Further, 11, 12, 13, and 14 are support members, and the seismic isolation wall connecting device 10 of the present invention is configured by including these four support members 11, 12, 13, and 14. Seven types a to g shown in FIG. 6 are examples of such a method of arranging the support members.

  Further, FIG. 7 shows an example of a tower crane which is a construction facility. In order to couple the mast 16 to a structure 18 where a seismic isolation device (not shown) is installed, the seismic isolation wall joining device according to the present invention is shown. 10 is applied. The seismic isolation wall connecting device 10 in FIG. 7 corresponds to the type d in FIG. FIG. 8 shows an example of a construction elevator that is a construction facility. In order to connect the guide rail 19 of the construction elevator to the structure 18 having the seismic isolation device denoted by reference numeral 17, the present invention relates to the construction elevator. This is an example in which the seismic isolation wall connecting device 10 is applied.

  In the seismic isolation wall connecting device 10 according to the present invention, the one shown in FIG. 1 corresponds to the type f in FIG. 6 and the one shown in FIG. 2 corresponds to the type b in FIG. 6 using a mast 17 'having a circular cross section. These seismic isolation wall connecting devices 10 use three or four of the support members 11, 12, 13, and 14, and each of the support members 11, 12, 13, and 14 is at both ends thereof. The bolts 15 are attached to the structure 18 and the construction facilities 17 ′ and 19.

  Each support member 11, 12, 13, 14 is divided in two, one of the respective divided parts being attached to the structure 18 and the other being attached to the construction equipment indicated by the guide rail 19 or mast 17 ′. In addition, each divided portion is fixed via an intermediate member 21. In the example of FIGS. 1 and 2, each of the support members 11, 12, 13, and 14 is divided into two parts, and both divided parts can be relatively moved using the intermediate member 21, and the friction at the fixed part is made. In order to manage or control the force, each divided portion is coupled with a coupling bolt 22 in a long hole, and a shear pin 20 is attached to control the displacement operation of the coupling bolt 22 using these as management means. It is something to manage.

  The seismic isolation wall connecting device 10 according to the present invention will be described more specifically with reference to FIGS. 3A, 3B, 3D, 3D, 3D, and 3D, the supporting member is made of L-shaped steel, and each of the divided portions 23 and 24 divided into two is formed by a long hole at an appropriate position on the L-shaped component side. Bolt holes 25 and 26 are formed in the longitudinal direction of the respective divided parts 23 and 24, and the connecting bolts 22 are inserted into the bolt holes 27 of the intermediate member 21 and connected using nuts, and shearing is performed at a set value. The shear pins 20 that enable this are inserted into the divided portions 23 and 24 and the mounting holes 28 and 29 of the intermediate member 21, respectively, and bolted using nuts. A predetermined diameter difference is provided between the diameter of the shear pin 20 and the diameter of the mounting holes 28 and 29 so as to cause slight slippage due to an earthquake load.

  4A, 4B, 4C, and 4D show that the support member is formed of H-shaped steel, and thereafter, the H-shaped configuration is obtained for each of the divided portions 33 and 34 that are divided into two in substantially the same manner as in the above example. Bolt holes 35 and 36 made of long holes are formed at appropriate positions on the sides in the longitudinal direction of the divided portions 33 and 34, and the coupling bolts 22 are inserted into the bolt holes 37 of the intermediate member 31 and nuts are inserted. The shear pin 20 that has been coupled using a shearing force at a set value and is inserted into the mounting holes 38 and 39 of the divided portions 33 and 34 and the intermediate member 31, respectively, and is bolted using a nut. Have. In the example of FIG. 4 using the H-shaped steel, since it has a coupling portion more than twice as large as that of the L-shaped steel, the mechanical performance as the management means of the friction joint is much larger than that of the former. In the above two examples, both the intermediate members 21 and 31 are illustrated as examples using a flat plate material. However, the present invention is not limited to this, and a material having an L-shaped or groove-shaped cross-sectional shape can be applied to the support member. 3 and 4, the installation location of the coupling bolt 22 is indicated by a center line.

  Further, in the apparatus of the present invention, a plate-shaped adjustment plate made of metal or resin is used as a friction adjusting means for the connecting portion and the shear pin mounting portion of each divided portion or the connecting portion of the support member and the intermediate member and the shear pin mounting portion. Can be arranged. The example will be described with reference to FIG. 5. For example, a resin-made adjustment plate 42 and a stainless-steel adjustment plate 43 are interposed as a set between the divided portion 40 of the support member and the intermediate member 41.

  When both the support member and the intermediate member are formed of black steel, the friction coefficient at the contact surface between the members is in the range of μ = 0.2 to 0.35. The friction coefficient between the stainless steel intermediate member and the ultra high molecular weight polyethylene is μ≈0.14. Although not described one by one, it is assumed that a necessary washer is used for the coupling bolt and is tightened with a predetermined torque using a nut. The predetermined torque is within a range in which the frictional force can be managed, and the shear pin 20 is fastened with a nut that is about the extent of retaining.

  The shear pin 20 is interposed between the divided portion and the intermediate member, causes a slight slip between the time when the seismic load is applied and before shearing, and then breaks when a predetermined shear force is transmitted. It should satisfy the condition. As the condition, the difference between the diameter of the shear pin 20 to be provided in the present invention and the diameter of the mounting holes 28 and 29 may be 0.5 millimeter or less until the diameter of the shear pin 20 is about 35 millimeters. If the diameter difference is within this range, the shearing force applied to the joint portion can be accurately transmitted to the shear pin 20 and can be broken with high accuracy. If the diameter of the shear pin 20 exceeds about 20 millimeters, the diameter difference may be increased accordingly, but the expansion of the diameter difference to the above range should be avoided as it results in a decrease in accuracy. Apart from that, it is also possible to adopt known technical matters in material mechanics such as the material of the shear pin 20, the cross-sectional shape and its change, or processing that can be performed to induce shear on the shear pin 20.

  In the seismic isolation wall connecting device 10 in the construction equipment according to the present invention configured as described above, when an earthquake load exceeding a preset value is applied to the support members 11, 12, 13, 14, the coupling bolt 22 is First, along the bolt holes 25, 26, 35, and 36, which are long holes, a slight displacement operation is generated, and the seismic load is absorbed and converted into friction and heat generation. At that time, the displacement operation decreases or stops. However, when the seismic load is larger and exceeds a preset shear load, the shear pin 20 starts to break. Also in this case, if the seismic load falls below the set value during the displacement operation, the shear pin 20 absorbs the seismic load within a range that does not lead to complete fracture. When the shear pin 20 is completely broken, the connecting pin 22 will move further along the long holes forming the bolt holes 25, 26, 35, 36, and this stage is the seismic load absorption by the device 10 of the present invention. Close to the final stage.

  In this way, it is possible to absorb the deviation between the upper part and the lower part of the seismic isolation structure caused by the earthquake motion, and it is possible to prevent the construction equipment such as the mast and the guide rail from being damaged. In addition, in the state where the upper and lower parts of the seismic isolation structure are not displaced, the support members 11, 12, 13, and 14 remain fixed even when an impact is applied. The device of the present invention does not malfunction due to the impact.

  The present invention can be used for a structure in which a seismic isolation device is installed and a facility that is not on the seismic isolation device in general. For example, the present invention can be applied to a permanent elevator of a guide rail type or a permanent lifting machine of a mast type.

It is a top view which shows Example 1 of the seismic isolation wall connection apparatus in the construction equipment which concerns on this invention. It is a top view which similarly shows Example 2 of the apparatus which similarly concerns on this invention. 1 shows a specific configuration example 1 of the apparatus according to the present invention, in which A is a partial front view, B is a side view with respect to FIG. 3A, C is a bottom view with respect to FIG. 3A, and D is a side view with respect to FIG. 2 shows a specific configuration example 2 of the apparatus according to the present invention, in which A is a partial front view, B is a side view with respect to FIG. 3A, C is a bottom view with respect to FIG. 3A, and D is a side view with respect to FIG. It is a partial expanded explanatory view which shows 2 of the specific structural examples of the apparatus which concerns on this invention. It is explanatory drawing which similarly shows seven types of arrangement methods a thru | or g of the supporting member in the apparatus which concerns on this invention. The example which applied the apparatus which concerns on this invention to the tower crane which is construction equipment is shown, A is a whole front view, B is a plane explanatory drawing which expands and shows a principal part. It is side explanatory drawing which shows the example which applied the apparatus which concerns on this invention to the construction elevator which is construction equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seismic isolation wall connection apparatus in construction facilities 11, 12, 13, 14 Support member 15 Bolt 16 Mast 17 Seismic isolation apparatus 18 Construction 19 Guide rail 20 Shear pin 21, 31, 41 Intermediate member 22 Connection bolt 23, 24, 33, 34, 40 Dividing parts 25, 26, 35, 36 Bolt holes 27, 37 Bolt holes 28, 29, 38, 39 Shear pin mounting holes

Claims (4)

A structure composed of a plurality of support members and equipped with seismic isolation devices and construction equipment such as construction elevators and tower cranes are combined and generated between the construction and construction equipment based on earthquake motion A seismic isolation wall connecting device that absorbs the effects of the difference in displacement,
In order to absorb the influence due to the difference in displacement that occurs between the structure and the construction equipment, each of the supporting members is divided into a plurality of parts, and each divided part is connected using a connecting bolt. With a structure that guarantees mutual displacement operation,
When an earthquake load exceeding a preset value is applied to the support member due to seismic motion, the bolt holes of the coupling bolts are made long so that the coupling bolts can move and cause displacement action. Seismic isolation wall connecting device in construction equipment, characterized by attaching possible shear pins between each divided part. The support member is configured to connect the divided parts directly using a connecting bolt and attach a shear pin, or connect the divided parts using a connecting bolt via an intermediate member between the divided parts, and connect the shear pin. The seismic isolation wall connecting device in the construction facility according to claim 1, which is configured to be attached. 2. A plate-shaped adjustment plate made of metal or resin is disposed as a friction adjusting means on the connecting portion and the shear pin mounting portion of each divided portion of the support member or the connecting portion and the shear pin mounting portion of the support member and the intermediate member. Or the seismic isolation wall connecting device in the construction facilities described in 2. Each divided portion of the support member is formed of an L-shaped or H-shaped metal mold, and is configured to be bolted at a certain position on each of the L-shaped or H-shaped components. 2. The seismic isolation wall connecting device in a construction facility according to claim 1, further comprising a displacement operation managing means.

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