KR20200038751A - The hysteretic damper for seismic retrofit - Google Patents

Abstract

The present invention relates to a hysteretic damper for seismic reinforcement, capable of dissipating large amounts of energy. The hysteretic damper for seismic reinforcement comprises: a pair of first bodies including a steel beam forming an inner core, a reinforcing pipe arranged around the steel beam, concrete mortar filled in the reinforcing pipe to prevent buckling of the steel beam, and a connection unit coupled to one side of the steel beam to be connected to a bracket coupled to edges of a beam and a column; and a second body allowing both sides thereof to be installed between the first bodies via a low-displacement unit, and having a high-displacement unit embedded therein to offset relatively large displacement. The second body includes: a steel beam; a reinforcing pipe arranged around the steel beam; and concrete mortar filled in the reinforcing pipe. The steel beam of the second body is divided into two pieces to be installed on each other while the high-displacement unit is arranged therebetween. The steel beams buried in the concrete mortar are separated from concrete mortar to be moved in a longitudinal direction. The low-displacement unit includes: coupling flanges fixed on the reinforcing pipes of the first and second bodies; and a stretching member interposed between the coupling flanges to respond to relatively small displacement.

Description

The damper for seismic reinforcement {THE HYSTERETIC DAMPER FOR SEISMIC RETROFIT}

 The present invention relates to a hysteresis damper for seismic reinforcement, and more specifically, it can flexibly resist low displacement due to vibration and weak vibration or wind load, and dissipates large energy while acting as a hysteresis damper at high displacement due to strong vibration or vibration. Of course, the present invention relates to a hysteretic damper for seismic reinforcement that enables automatic restoration to a circular shape after deformation occurs due to a load applied to a structure.

In general, building structures must have a seismic design to protect them from wind loads as well as earthquakes.

In particular, the damage caused by the collapse of the structure in the event of an earthquake is enormous, so it is essential to reinforce the strength and seismic resistance of the structure by installing a damping device in a frame such as a pillar or beam to resist the earthquake load.

Therefore, a friction damper that generates friction energy or a hysteresis damper that elastically deforms is installed in the building structure for earthquake-resistant reinforcement.

However, if a single damper is used in this way, it is impossible to cope with both small and large lateral loads.

For example, in the case of a wind load or a small-scale earthquake, energy dissipation capacity is exhibited due to the friction energy generated by the friction damper, but it is difficult to exhibit a sufficient function only with the friction damper when a large-scale earthquake arrives.

Therefore, a hysteresis damper is required to exert energy dissipation ability in a large-scale earthquake as well as a wind load or a small earthquake in a gate-shaped frame.

As a technology that is the background of the present invention, 'Energy Dissipation Type Gasam Damper' has been proposed as Korean Patent Registration No. 10-1724535.

This is a first friction member having a first flat surface; A second friction member having a second flat surface in close contact with the first flat surface; And a shape memory member connecting the first friction member and the second friction member, wherein the shape memory member is tensioned when the first friction member and the second friction member are moved away from each other, and the first friction member and the second friction member are It is characterized in that it is buckled when it is close to each other, so that it is made to be automatically restored to a circular shape after deformation occurs due to a horizontal load applied to the structure.

However, the above background technology exhibits energy dissipation capacity when wind loads or small-scale earthquakes arrive, but when large lateral loads due to relatively large-scale earthquakes occur, it exceeds the energy dissipation capacity, resulting in a problem that the structure cannot be restored. .

Republic of Korea Registered Patent No. 1724535

The present invention has been devised in view of the above problems, and the first object of the present invention is to be able to flexibly resist low displacement due to vibration and weak vibration or wind load, and to act as a hysteresis damper at high displacement due to strong vibration or vibration. In addition, it is to provide a hysteretic damper for seismic reinforcement that can dissipate a large amount of energy and automatically restore it to a circular shape after deformation occurs due to a load applied to the structure.

The second object of the present invention is that the low displacement transmitted to the steel beam through the connection portion of the first body allows the elastic member of the low displacement portion to be absorbed, and is transmitted to the steel beam of the second body through the connection portion of the first body. The displacement exceeds the elasticity of the low displacement portion, which is to provide a hysteretic damper for seismic reinforcement that allows the high displacement portion to dissipate.

According to a feature for achieving the above object, the first invention relates to a hysteresis damper for seismic reinforcement, for this purpose, a steel beam forming an inner core, a reinforcement pipe disposed around the steel beam, and the steel beam A pair of first bodies made of a concrete mortar filled in the inside of the reinforcing pipe to prevent buckling, and a connection part coupled to one side of the steel beam and connected to a bracket coupled to a corner of a column and a beam; And a second body in which a high displacement portion is built in such that both sides of the first body are addressed via a low displacement portion, and a relatively large displacement is offset therein, but the second body is made of steel. A beam, a reinforcing pipe having a perimeter of the steel beam, and a concrete mortar filled in the reinforcing pipe, the steel beams of the second body are separated into two and are mutually addressed through a high displacement portion, the Each steel beam embedded in the concrete mortar is configured to be separated from the concrete mortar so that it can flow in the longitudinal direction, and the low displacement portion is coupled between the coupling flange fixed to the reinforcing pipes of the first and second bodies, and each coupling flange. It is characterized by being interposed and made of an elastic member corresponding to a relatively small displacement.

In the second invention, in the first invention, the high displacement portion is fixed to the concrete mortar, and on both sides, a guide fixing body in which each steel beam composed of two pieces is slidingly coupled, and a steel beam inserted into the guide fixing body It is characterized by being composed of a high elastic body interposed between.

The third invention is characterized in that, in the first invention, each of the coupling flanges is connected through a coupling pin so as to be able to flow through a stretching member therebetween.

The fourth invention is characterized in that, in the first invention, the steel beam is formed with a plurality of incisions to prevent fracture by buckling and to respond to expansion and contraction.

The fifth onset, in the first invention, is characterized in that each connecting portion is spaced apart with a reinforcement pipe and a certain "gap" so that only the external force transmitted can be transmitted to the steel beam.

According to the hysteresis damper for seismic reinforcement of the present invention, it is possible to flexibly resist low displacement due to vibration and weak vibration or wind load, and be able to dissipate large energy while acting as hysteresis damper at high displacement due to strong vibration or vibration. have.

In addition, the high displacement portion of the present invention, the high elastic body is maintained in a compressed state of about 80% ~ 90%, there is an effect that can prevent the residual deformation of the hysteresis damper.

In addition, the present invention allows the low displacement that is transmitted to the steel beam through the connection portion of the first body to absorb the elastic member of the low displacement portion, and the high displacement that is transmitted to the steel beam of the second body through the connection portion of the first body is the low displacement portion. Beyond the elasticity of, this has the effect of contributing to the stabilization of the building because it can dissipate the high displacement.

1 is a cross-sectional configuration of the hysteresis damper for seismic reinforcement according to the present invention,
2 is a configuration diagram showing a state in which a hysteresis damper for seismic reinforcement according to the present invention is installed.

The following objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments related to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete and that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

The embodiments described and illustrated herein also include its complementary embodiments.

In this specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, 'comprise' and / or 'comprising' does not exclude the presence or addition of one or more other components.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the following specific embodiments, various specific contents have been prepared to more specifically describe and understand the invention. However, a reader who has knowledge in this field to understand the present invention can recognize that it can be used without these various specific contents. It should be noted that, in some cases, parts that are commonly known in describing the invention and that are not significantly related to the invention are not described in order to avoid confusion in describing the invention.

1 is a configuration diagram of a hysteresis damper for seismic reinforcement according to the present invention, and FIG. 2 is a configuration diagram showing a history damper for seismic reinforcement according to the present invention.

1 and 2, the present invention can flexibly resist low displacement due to weak vibration and weak vibration or wind load, and can dissipate large energy while acting as a hysteresis damper at high displacement due to strong vibration or vibration. Of course, the present invention relates to a hysteresis damper 100 for seismic reinforcement that enables automatic restoration to a circular shape after deformation occurs due to a load applied to a structure.

The hysteresis damper 100 for seismic reinforcement of the present invention is not only installed in a diagonal direction, but also can be installed in a "Y" form or an "X" form by connecting a plurality.

And the hysteresis damper 100 for seismic reinforcement of the present invention is largely divided into three first and second bodies 100a and 100b, and each body 100a and 100b comprises a steel beam 110 forming an inner core. , Consisting of a reinforcement pipe 120 disposed around the steel beam 110 and a concrete mortar 130 filled inside the reinforcement pipe 120 to prevent buckling of the steel beam 110.

Here, the first body (100a) is a structure that is mutually addressed with the second body (100b) therebetween, and between the first body (100a) and the second body (100b) is a low displacement portion (150) as a medium The speech is provided, and the high displacement portion 160 is built in the second body 100b.

On the other hand, the steel beams 110 of the first body 100a and the second body 100b are separated from the concrete mortar 130 so that they can flow in the longitudinal direction while being embedded in the concrete mortar 130. This is possible by coating a separate coating film on the surface of the steel beam 110 before pouring the concrete mortar 130.

In addition, each of the first body (100a) is coupled to one side of the steel beam 110 includes a connecting portion 140 connected to the bracket 210 coupled to the edge of the pillar (200a) and beam (200b). Through this, the hysteresis damper 100 is disposed diagonally inside the door frame constructed of steel or concrete to provide a structure that can be installed at corners facing each other.

In addition, each of the connecting portions 140 is formed with a reinforcement pipe 120 and a predetermined "gap (G)" so that the external force transmitted can be transmitted only to the steel beam 110. This structure is to ensure that the steel beam flows smoothly by a large displacement, and to prevent the steel beam 110 from colliding with the reinforcement pipe 120.

In addition, the steel beams 110 of the first body 100a and the second body 100b may be formed with a plurality of incisions 111 to prevent fracture by buckling and to respond to expansion and contraction.

On the other hand, the concrete mortar 130 is short-length and short-length steel fibers or pva-based fibers are cured by mixing and curing hydrated cement and aggregate to obtain tensile strength, flexural strength, resistance to cracking, ductility, shear strength, impact resistance, etc. Can improve. Here, as the mixing ratio of the steel fibers increases, the number of steel fibers per unit area increases, thereby controlling the crack propagation in the cross-section, thereby increasing the tensile strength of concrete and the strain at maximum tensile stress and ductility.

In addition, the low displacement portion 150 is relatively small interposed between the coupling flange 151 fixed to the reinforcing pipes 120 of the first and second bodies 100a and 100b, and each coupling flange 151. It consists of a stretchable member 152 corresponding to the displacement. At this time, each of the coupling flanges 151 is connected through a coupling pin 153 with an elastic member 152 interposed therebetween, which is weak vibration and weak vibration applied to the two first bodies 100a. This is to allow the elastic member 152 to respond to low displacement due to wind load.

The low-displacement unit 150 is capable of flexibly resisting vibration and displacement caused by weak vibration or wind load, and serves to absorb viscous behavior. In the embodiment of the present invention, the two low-displacement portions 150 are installed, but may be configured by selectively installing one or two or more.

In addition, the elastic member 152 of the low displacement portion 150 may be made of a rubber material having elasticity, and may be composed of resin, particulate carbon elastic member black, and silica compounded to increase durability.

The high displacement portion 160 functions to compensate for the relatively large displacement generated by strong vibration or vibration. At this time, the steel beams 110 of the second body 100b are separated into two, and the high displacement portions 160 are interposed to be addressed to each other.

 Specifically, the high displacement portion 160 is fixed to the concrete mortar 130, and each steel beam 110 composed of two pieces is slidingly coupled to the guide fixing body 161 and the guide fixing body 161. It is composed of a high elastic body 162 interposed between the inserted steel beam (110).

The high elastic body 162 prevents the buckling of the steel beam 110 and allows automatic restoration to a circular shape after deformation occurs by a load applied to the structure, while remaining in a compressed state of about 80% to 90% It is configured to absorb large displacement while deforming along the hysteresis curve while preventing deformation and responding to shrinkage and tension.

The high elastic body 162 can dissipate external forces during the expansion and contraction of a large displacement while dispersing the load, and a plate spring or coil capable of dissipating a large displacement through contraction of 10% to 20% along with expansion and contraction of the low displacement portion. It can be a spring.

As described above, the hysteresis damper 100 for seismic reinforcement of the present invention can flexibly resist displacement through weak displacement and weak vibration or wind load through the low displacement portion 150, and acts as a hysteresis damper during displacement due to strong vibration or high vibration while acting as a hysteresis damper. It is possible to dissipate large energy through 160, and in particular, the high elastic body 162 of the high displacement portion 160 can be automatically restored to a circular shape after deformation occurs due to a load applied to the structure.

Accordingly, the low displacement transmitted to the steel beam 110 through the connection portion 140 of the first body 100a allows the elastic member 152 of the low displacement portion 150 to be absorbed, and the connection portion of the first body 100a The high displacement transmitted to the steel beam 110 of the second body 100b through 140 exceeds the elasticity of the low displacement portion 150, which is a configuration that allows the high displacement portion 160 to dissipate.

As described above, the hysteresis damper 100 for seismic reinforcement according to the present invention, although the lengths of the first body and the second body are equally configured, optionally, the length of the second body is more than the length of the first body. It can be configured long, and of course, the position of the low displacement portion may be changed according to the length of the second body.

In addition, the hysteresis damper for seismic reinforcement of the present invention can be configured by connecting the second body to the first body only by using a steel beam, and also by forming only a single low displacement portion.

In addition, the hysteresis damper for seismic reinforcement of the present invention can eliminate the high displacement portion on the second body, and can be composed of only one or two low displacement portions.

The configuration shown in the embodiments and drawings described in the specification of the present invention is only one of the most preferred embodiments of the present invention and does not represent all of the technical spirit of the present invention, and thus can replace them at the time of application. It should be understood that there may be equivalents and variations.

100: hysteresis damper for seismic reinforcement
100a: first body 100b: second body
110: steel beam 111: incision
120: reinforcement pipe
130: concrete mortar
140: connection
150: low displacement portion 151: coupling flange 152: elastic member
153: coupling pin
160: high displacement portion 161: guide fixing body 162: high elastic body
G: Gap
200a: pillar 200b: beam 210: bracket

Claims (5)

A steel beam 110 forming an inner core, a reinforcement pipe 120 disposed around the steel beam 110, and filled inside the reinforcement pipe 120 to prevent buckling of the steel beam 110 A pair of first bodies made of a concrete mortar 130 and a connecting portion 140 coupled to one side of the steel beam 110 and connected to a bracket 210 coupled to a corner of the pillar 200a and the beam 200b. (100a); And
Between the first body (100a), both sides are addressed via the low displacement portion (150), and a second body (100b) with a high displacement portion (160) embedded therein so as to offset a relatively large displacement; Including,
The second body (100b) is made of a steel beam 110, a reinforcement pipe 120 around which the periphery of the steel beam 110 is disposed, and a concrete mortar 130 filled inside the reinforcement pipe 120 under,
The steel beams 110 of the second body 100b are separated into two and are mutually addressed through the high displacement portion 160,
Each of the steel beams 110 embedded in the concrete mortar 130 is separated from the concrete mortar 130 so that it can flow in the longitudinal direction.
The low displacement portion 150 is interposed between the coupling flange 151 fixed to the reinforcing pipes 120 of the first and second bodies 100a and 100b, and the coupling flanges 151, thereby providing relatively small displacement. A damper for seismic reinforcement, characterized in that it consists of a telescopic member 152 corresponding to.
According to claim 1,
The high displacement portion 160 is fixed to the concrete mortar 130, the guide fixing body 161 to which each steel beam 110, which is divided into two on both sides, is slidingly coupled, and the guide fixing body 161 A hysteretic damper for seismic reinforcement, characterized in that it is composed of a high elastic body 162 interposed between the steel beams 110 inserted in. According to claim 1,
Each of the coupling flanges 151 is a hysteresis damper for seismic reinforcement, characterized in that it is connected through a coupling pin 153 so as to be able to flow with an elastic member 152 therebetween.
According to claim 1,
The steel beam 110 is a damper for seismic reinforcement, characterized in that a plurality of cutouts 111 are formed to prevent fracture by buckling and respond to expansion and contraction.
According to claim 1,
Each connection portion 140 is a seismic reinforcement hysteresis damper characterized in that it has a predetermined "gap (G)" and a reinforcing pipe 120 so as to transmit the external force transmitted only to the steel beam 110.

Images