JPH011837A - Energy absorbing assembly and construction comprising the energy absorbing assembly - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) Kizawa 1 is applicable to structures such as buildings and similar structures;
In particular, it relates to structures that absorb the energy generated by earthquakes and other loads applied to buildings, thereby minimizing the structural damage to such buildings.

BACKGROUND OF THE INVENTION Buildings of various constructions typically consist of vertical columns and horizontal floor beams connected to the columns. Typically, the ends of the floor beams are butt welded to adjacent columns to rigidly secure the framework in place.

Although these structures are satisfactory for absorbing the shocks or loads of weak or small earthquakes on the structure, when the shocks and loads of such earthquakes become relatively large, the support and beam Structures consisting of these structures will suffer irreparable damage and will have to be dismantled and rebuilt.

(Problem to be Solved by the Invention) In order to minimize such structural damage, various types of damping devices have been installed between columns and beams to absorb some of the energy. . however,
Such damping devices remain unsatisfactory for several reasons. Therefore, there is a need to improve the energy absorption devices used in structures of the type described so that they can reliably absorb seismic forces and other forces, such as wind pressure.

An energy absorbing device coupled to plumbing or similar equipment is disclosed in U.S. Patent No. 4. [As disclosed in f20,888. This patent uses a number of plate-like energy absorbing members with an hourglass or X-shaped structure. First ends of the energy absorbing members are coupled to a fixed support surface, such as a wall, and second ends of the members are cantilevered from the first ends. An arm is firmly connected to the end of the cantilevered element. The arms protrude outward,
MI+ has an end fixed to one end of the long connector. The opposite end of the connector is connected to plumbing or similar equipment.

The point of attachment of the outer end of the arm and the connector is located in a plane passing through the central or narrowest area of the energy absorbing member, and as the arm or cantilevered end of the member moves, The applied tensile and compressive forces are kept to a minimum. As a result, one member is free from structural damage caused by the actual bar and ring, and the member can function functionally for a long period of time.

While the element structures of the aforementioned patents have been successful in a range of structural applications related to pipework and the like, they have not been successful in applications that absorb energy associated with the relative motion of structural columns and beams. There is still room for improvement.

In contrast, the end product Elj provides an improved assembly that can also be used in architectural applications where displacement is lower than in piping applications.

(Means for Solving the Problems) The present invention connects a series of metal plate-like elements provided at one interval to each other via end blocks and spacers that are fastened to each other. The elements are substantially parallel to each other and extend in a cantilevered manner from the upper end of the Mt body.

In one embodiment of the invention, the upper end of the element is rigidly connected to the floor beam. The cantilevered end is also connected via a plate-like strut to an adjacent column, to which the floor beam is pivotally attached. In a first embodiment, multiple poles are used, and the lower end of the plate can be freely interlocked with respect to the upper end of the plate.

In a second embodiment of the invention, the assembly comprises an element consisting of an hourglass-shaped plate. The upper end of the element is rigidly fixed to the horizontal floor beam. An inclined place is fixed to both lower ends of the element, the lower ends of the places extending downwardly and away from each other and are fixed to a subsequent floor beam located below.

OPERATION The assembly of the present invention is used to increase the energy absorption capacity of a structure and improve its responsiveness to dynamic loads, such as those commonly found in buildings. This energy-absorbing or damping capacity-altering effect is obtained by bending or deforming an assembly of plate-like elements beyond their yield point. The unique triangular shape of the plate-like elements of the first embodiment makes it possible to increase the damping capacity so that the structure does not shake violently even when exposed to dynamic loads, e.g. due to earthquakes or wind pressure. The mold cost is a major factor. With this configuration.

This is because the material can be deformed almost uniformly over the entire length and width of the plate-like element.

A principal object of the present invention is to provide a new and improved energy absorbing assembly consisting of plate-like elements. Said plate-like elements are arranged such that the assembly can be connected to a structure of columns and beams. The assembly increases the energy absorption capacity of the structure and can protect the structure from damage when the structure is exposed to dynamic loads such as those caused by earthquakes or wind.

Other objects of the invention will become apparent from the description below.

Some embodiments of the present invention will be described in detail with reference to the accompanying drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral IO generally indicates a first embodiment of an energy absorbing assembly according to the invention. The energy absorbing assembly includes a plurality of spaced apart plate-like energy absorbing elements 12. The individual elements are of the type shown in FIG. The elements are arranged substantially parallel to each other in a vertical position, as shown in FIG. Each element 12 has a rectangular upper portion 1
4, a triangular central portion 18, and a portion 16 connecting the upper portion and the central portion. The triangular central portion 18 is provided with a pair of slanted edges 20 which converge as they approach the lower portion 22 . The lower part is approximately rectangular, and the upper part 14
The side portions 14, the central portion 18 and the lower portion 22, which are smaller in shape than the L, are integral with each other. Element 12 is made from a suitably rigid material, such as iron.

The upper portion 14 of each element 12 includes a pair of spaced holes 24. As shown in FIG.
4. A pair of bolts 27 are inserted through the spacer 30 and the block 28, and when these bolts are tightened, the upper portion 14 is fixedly tightened via the pair of end blocks 28 and the plurality of spacers 30. A nut 29 also secures the bolt in place. Element 12 cantilevers outwardly and downwardly from the spacer and end block.

Each element 12 has a central portion 1 as shown in FIG.
8 and the lower part 22 have the narrowest area 31. Therefore, the central portion 18 has a substantially triangular shape, and bending of the element due to absorption of energy occurs mainly in the area 31.

The lower portion 22 of each element 12 is provided with a rectangular recess 32 in one side surface. These rectangular recesses 32 extend substantially parallel to the lower edge 34 of the lower portion 22. These recesses are adapted to receive partially cylindrical rollers 36, as shown in FIG. The roller is rotatable relative to the element, and when the assembly IO is used in accordance with the method described with reference to FIG. It forms a means of holding the object in a safe manner.

A pair of end blocks 38 are located at the lower ends of assembly IO. Each end block 38 has an equally sized recess 40 on its negative surface.

These recesses 40 are connected to the element 12 as shown in FIG.
in horizontally aligned relationship with a recess 32 in upper portion 22 of. A pair of bolts 39 pass through holes 41 in end block 38 and nuts 37 are screwed onto the bolts.

Thus, the bolt joins the lower ends of the elmmen h12 in a crab manner, and the joined elements 12 are tightened by the end block 38 and the roller 36 in place in the recesses 32 and 40, respectively. is fixed.

A plate-like strut 42 is rigidly secured to and extends laterally from one of the end blocks 38, as shown in FIGS. 1 and 5. The tension 42 is
It includes a lip that is welded to the exposed portion on the side adjacent the end block 38.

A recessed portion 46 is formed at an adjacent end of the strut 42;
A clearance is provided between the bolt 39 and the nut 37.

In use, as shown in FIG. 4, the assembly 10 is placed between the vertical support column 50 and the horizontal floor beam 52. I! tied.

Posts 50 and beams 52 are typically structures.

For example, a part of a building. Additionally, both the column and the beam are made of structures such as I-beams or H-beams. The column 50 has side flanges 54, and the beam 52 has upper and lower flanges 56.
It is equipped with Each of the pillar 50 and the beam 52 has a protrusion 58.
and 60 are provided, and these protrusions are connected to each other by pins 62.

Therefore, the beam 52 can be installed laterally spaced apart from the column 50, and the beam 52 can be rotated about the bin 62 relative to the column 50 in the event of an earthquake.

The assembly 10 is coupled to the lower flange 56 of the beam 52 by welding the upper end block 28 of the assembly 10 to the door surface of the door flange of the beam 52. A strut 42 is welded to the lower end of the block as shown in FIG. The outer ends of struts 42 are also welded to adjacent flanges 54 of struts 50 as shown in FIG.

Therefore, instead of welding the assembly 10 to the struts 50 and beams 52, in which the assembly 10 is rigidly fixed to both the struts 50 and the beams 52, port or other fasteners can be used as needed. Rigid connections may also be provided between the assembly 10 and the supports and beams.

A building with columns 50 and beams 52 is 1K before an earthquake or wind pressure.
When exposed to
It functions to absorb the energy of li- generated when deforming with respect to the pillar 50.

For example, if the strut deforms to the left, the lower flange 5
The gap between element 6 and the column is reduced, and element 12
The element is deformed and moved to the element position 12A indicated by the dotted line in the figure. This position exceeds the elastic limit for element 12, resulting in permanent distortion. In the event that the (Niremen) 12 is deformed to the extent that it changes its shape and is no longer useful for absorbing new earthquake shocks or wind pressure loads, the assembly IO should be replaced as appropriate. Can be done. When the beam 52 rotates clockwise as seen in FIG. 4 due to earthquake shaking, the element 12 of one assembly 10 absorbs energy, and the element is at the position m12B (as shown by the dotted line).
It is conceivable that it can be deformed up to (Fig. 4). element 1
Even if 2 undergoes permanent deformation, the element in this case can also continue to absorb earthquake shocks or wind loads. Therefore, even after permanent deformation occurs, replacement of the assembly is not necessarily necessary.

Assembly IO can be used to enhance the energy absorption capabilities of a structure and improve the response of a structure with columns 50 and beams 52 to dynamic loads. This improved ability to absorb or dampen energy is achieved by bending or deforming the elements of the assembly 10 beyond the yield point of the membrane 12. By providing the assembly 10 to increase the damping effect, the columns 50 and beams 52 are provided with a special shape of the element 12 that does not sway violently even when exposed to dynamic loads such as earthquakes or wind loads. are important elements of the assembly 10. This is because the shape of the elements 12 allows the material to be deformed almost uniformly over the entire length and width of each element.

6-11, another embodiment of an energy absorbing assembly according to the present invention is shown, and is designated generally by the reference numeral 70.

As shown in FIG. 8, the assembly body 70 is composed of a plurality of substantially rectangular plate-like elements 72 having an hourglass-shaped structure. In the example of FIG. 8, the plate-like element 72 has a triangular upper part 74 and a rectangular lower part 76, with a narrowed area 78 between both parts. 70 is a series of upper spacers 79;
A pair of upper end blocks 80 and ports 81 are provided at the upper end of the assembly. Similarly, the lower portion of assembly 70 includes end blocks 82 . Spacer 84 and Porto 8
5 is installed.

Assembly 70 is adapted for use in construct 86 (FIG. 6). This construction 86 may be constructed by assembling two assemblies 70, for example, as shown in FIGS. The end block 80 of the assembly 70 is attached to the underside of the central portion of the beam 90 and is welded to the flange 91 of the beam 90, with the element 72 extending downwardly from the beam 90 as shown in FIG. A ramp place 94 is secured to the end block 82 of the assembly 70 by welding. The places 94 extend downward while moving away from each other, and, as shown in FIG. 6, are connected to a connection point between the floor beam 91 located on the lower side and the adjacent column 88.

In use, assembly 70 is shown in FIGS. 6 and 7.
isfj! :90. Earthquake load or earthquake #
When a blow is applied to the structure 86, the beam 90 moves to the right or to the left relative to the beam 91. With such movement, the element 72 of the assembly 70 deforms beyond its elastic limit,
Permanent distortion occurs. If the place 94 moves to the right as viewed in FIG. 7, it is possible that the element 72 deforms to the dotted line position 72A shown in FIG. If place 94 moves in the opposite direction, element 72 moves to dotted line 7.
Transform to position 2B.

Another method of connecting the upper end of the place 94 to the assembly 70 is to attach a pair of triangular plates 96 (FIGS. 9 and 11) at the do side of the Ml solid 70 as shown in FIG. It can be installed in the end block 82. Each plate 96 is provided with a hole 98 for receiving a bottle lOO whose side end is pivoted to the - side of the place. Each place includes a pair of spaced end pieces with holes 102 therethrough.

FIG. 11 shows the hole 101 in the place and the hole 9 in the plate 96.
Bin 100 passing through 8 shows how the upper end of place 94 is connected to plate 96. Bin 100 is located in a plane passing through area 78 of element 72.

The configuration of the present invention together with the embodiments is summarized as follows.

(1) In a structure, there is a vertical support, a horizontal floor beam, and an axis located at one end of the floor beam near the upper part of the floor beam. and an energy absorbing assembly connected to the column and connected to the floor joist near a lower portion of the floor joist and proximate one end of the floor joist. Constructs that are

(2) In the structure described in (1) above, the energy absorbing assembly includes a plurality of horizontally spaced and vertically extending plate-like elements, and the lower ends of the elements are connected to the column. tensioning means, the lower ends of these elements being interlocking 611F.

(3) In the construct described in item h (2), each element has a substantially triangular shape.

(4) The construction according to (2) above, wherein the lower ends of each pair of adjacent elements are provided with a roller therebetween.

(5) The structure according to item L (4), in which each element is provided with a recess for partially receiving an adjacent roller.

(6) In the structure described in (4) above, a pair of end blocks adjacent to the lower end of the element and a bolt means connected to the end blocks are provided, and one of the end blocks is provided with a support. A structure that has a strut connected to it.

(7)] - In the structure described in item (1), a fastening means is provided near the upper end of the element for fastening and fixing the elements to each other, and the fastening means 1. 'II Structures in which fixed means are firmly connected to floor beams.

(8) In a structure consisting of a series of horizontally spaced straight columns, a series of vertically spaced horizontal floor beams, and an energy absorbing assembly, The energy absorbing assembly is.

a plurality of generally parallel longitudinally oriented plate-like energy absorbing elements, each having a central portion having a narrowed width dimension; and means for clamping and securing the upper ends of the elements together; means connected to the lower end of the element to enable the element to bend in its central portion; A construction having a place-L step for connecting to a located floor beam.

(9) A construct according to (7) above, in which each element is hourglass-shaped.

(10) In the structure described in (7) above, the connecting means includes a pair of inclined places, and the inclined places are acid-shaped toward the lower end of the element as they approach the lower end of the element. A structure in which the lower end is connected to the floor beam located on the door side.

(11) The construct described in (lO) above, in which the upper end of the place is connected to the lower end of the element.

(12) The structure as described in (10) above, wherein a pair of side plates are provided, each plate having a triangular shape and having an upper portion corresponding to the central portion of the element, and wherein the place is provided with a pivot pin. such a construct is connected to this upper part via.

[Brief explanation of the drawing]

FIG. 1 shows the stopping factor of the energy absorbing assembly according to the present invention. Figure 2 shows a series of generally horizontally spaced, vertically oriented plate-like elements connected together to form a single unit. FIG. 1A is a perspective view of the assembly of FIG. 1; FIG. 2 is an elevational view of one of the plates of the iVt volume of FIG. 1; 3 is an iF view of one of a pair of lower end blocks forming part of the assembly of FIG. 1; FIG. FIG. 4 shows the use of the energy absorbing assembly of the present invention.
FIG. 2 is a schematic diagram showing a column and a floor beam that are connected to each other. FIG. 5 is an enlarged schematic diagram of a portion of the energy absorbing assembly showing the struts connecting the assembly to the upright struts. FIG. 6 is a schematic diagram showing a series of struts and floor beams, one of which is fitted with an energy absorbing assembly according to another embodiment of the invention. FIG. 7 is an enlarged schematic diagram of a portion of the energy absorbing assembly of FIG. 6, illustrating the upper beam and how the assembly is connected to the upper beam. FIG. 8 is a top view of one of the plate-like elements of the energy absorbing assembly in FIGS. 6 and 7; FIG. 9 is a front view of the energy absorbing assembly of FIGS. 6 and 7, showing the ramp place connecting the assembly to another floor joist located below. 10 is a side view of one end of the place of FIG. 9; FIG. FIG. 11 is a side view of the assembly of FIGS. 6, 7, and 9, illustrating how the place of FIG. 1 theta is connected to the plate assembly. 10...Energy absorbing assembly 12-...Plate-like element 14...Rectangular inner part 18...Triangular central part 22...Rectangular lower part 24-@-Hole for port 27-・φ bolt 28... End block 30... Spacer 31... Narrowest area 32... Lower part recess 36... Cylindrical roller 38... End block 39...・-Bolt 40...Recess 41-...Bolt hole 42...Strut 50...Strut 52・-φ Liangichi agent Patent attorney Positive Vapor pressure (external law name) Shi- Kumu no Sushi

Claims (2)

[Claims] (1) A vertical support, a horizontal floor joist, and a means for pivotally attaching the floor joist to the support, located at one end of the joist and near the upper portion of the joist. and an energy absorbing assembly connected to the column and connected to the floor joist near a lower portion of the floor joist and proximate one end of the floor joist. (2) In a structure consisting of a series of horizontally spaced vertical columns, a series of vertically spaced horizontal floor beams, and an energy absorbing assembly, The absorption assembly comprises a plurality of generally parallel longitudinally oriented plate-like energy absorption elements, each having a central portion with a narrowed width dimension, and means for clamping the upper ends of the elements together. means connected to the lower end of the element to enable the element to bend in a central portion; and place means for connecting to a floor joist located at.