JP2009002118A - Friction damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a friction damper capable of dissipating heat of a sliding material. <P>SOLUTION: This friction damper 10 mainly comprises a plate material 12, the sliding material 14, and the other-side plates 16 and 18. When a shock is generated by an earthquake etc., a friction force is generated on a boundary face between the sliding material 14 and the other-side plates 16 and 18; the vibrational energy of the shock is gradually attenuated so that the seismic control of a building 100 can be performed. In this case, when the frictional force is generated, the sliding material 14 or the other-side plates 16 and 18 generates or generate heat. An iron plate with a thermal conductivity of 80 W/m*K*s or more is used for the other-side plates 16 and 18, and as the degree of local thermal diffusion becomes sufficiently higher as compared with the average degree of thermal diffusion. The generated heat is rapidly dissipated to a skeleton of the building 100. Thus, the frictional force is not decreased due to a short-time earthquake response, and the sliding material 14 is not melted or destroyed due to a long-time earthquake response. Consequently, the seismic-control effect of the friction damper 10 can be maintained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a friction damper that reduces shaking of a building structure.

  In order to reduce shaking of a building structure due to an earthquake or the like, a friction damper is provided on a beam or brace of the building structure. The friction damper has a mechanism in which a sliding plate is provided on one of two members that are relatively displaced, and the vibration is attenuated by a frictional force generated on a contact surface between the sliding plate and the other member.

  Here, as an example of the friction damper, a member in which a first pressure contact plate and a second pressure contact plate are provided on two members that are relatively displaced by vibration, and a friction plate and a sliding plate are provided between the first pressure contact plate and the second pressure contact plate. Yes (see, for example, Patent Document 1).

  In the friction damper of Patent Document 1, the friction plate is made of resin or the like, and the sliding plate is made of metal made of stainless steel or titanium. Then, by making the friction coefficient between the second pressure contact plate and the friction plate larger than the friction coefficient between the first pressure contact plate and the sliding plate, the adhesion and fixation of the friction plate is made unnecessary.

However, the friction damper of Patent Document 1 is in a state in which the heat of the sliding plate is difficult to escape because the thermal conductivity of stainless steel or titanium is small, and the temperature of the friction plate, which is the counterpart material, rises rapidly and the damper characteristics are likely to change It was.
JP 2003-307253 A

  An object of this invention is to obtain the friction damper which can release the heat | fever of a sliding material.

  According to a first aspect of the present invention, there is provided a friction damper, comprising: a plate member attached to one building structure; a sliding member fixed to the plate member; and abutting against the sliding member, relative to the one building structure. It is attached to another moving building structure and has a mating plate material having a thermal conductivity of 80 W / m · K · second or more.

  According to the above configuration, by using a material having a thermal conductivity of 80 W / m · K · second or more (generally, five times or more of a stainless steel plate of SUS304) as the mating plate material, between the sliding material and the mating plate material. Heat generated on the friction surface quickly escapes to the outside of the friction surface.

  For this reason, the sliding material is not altered by heat, the frictional force does not decrease for a short time earthquake response, and the sliding material melts or breaks for a long time earthquake response. Since there is no, the damping effect of the friction damper can be maintained.

  In the friction damper according to claim 2 of the present invention, the thickness of the mating plate material takes into account the thermal diffusion of the mating plate material due to the elapsed time in which one building structure and the other building structure are moving relative to each other. It is characterized by being defined.

  According to the above configuration, the mating plate material can be set to an optimum plate thickness by determining the thickness so that the degree of local thermal diffusion is sufficiently larger than the average degree of thermal diffusion. .

  The friction damper according to claim 3 of the present invention is characterized in that the sliding material is made of a fluorine resin or a phenol resin having a thickness of 1 mm or less, and a backing material made of a back metal is mounted. Yes.

  According to the above configuration, the sliding material is made of fluorine resin or phenolic resin having a thickness of 1 mm or less, and the backing material made of the back metal is mounted. be able to. For this reason, the frictional force of the sliding material does not decrease for a short time earthquake response, and the sliding material does not melt or break for a long time earthquake response. The vibration control effect can be maintained.

  A friction damper according to a fourth aspect of the present invention is characterized in that a groove is formed in the plate material, and the sliding material is fitted in the groove.

  According to the above configuration, when the sliding material is fitted into the groove portion, the frictional force is transmitted by the support pressure of the contact portion between the sliding material side surface and the groove portion side surface. Since heat due to friction is mainly transmitted to the contact portion between the lower surface of the friction surface and the plate material plane, stress concentration due to heat deterioration of the adhesive or generation of temperature stress at the screwing portion hardly occurs. For this reason, local stress concentration on the sliding material can be reduced.

  A friction damper according to claim 5 of the present invention is provided with a plurality of plate members each having the sliding material fixed on both sides thereof, and the mating plate material is interposed between the sliding materials fixed to the plate materials arranged above and below. The mating plate is inserted and brought into contact with the sliding material, and the mating plate material in contact with the uppermost sliding material and the mating plate material in contact with the lowermost sliding material are provided.

  According to the above configuration, the friction area per stage can be reduced by stacking a plurality of plate materials, sliding materials, and mating plate materials to form a multi-stage friction surface. Thereby, the friction damper can be made compact, and the friction damper can be installed even if the gap between the one building structure and the second building structure is narrow.

  Since the present invention is configured as described above, the heat of the sliding material can be released, the sliding material is not melted or broken, and the vibration damping effect of the friction damper can be maintained.

  A friction damper according to a first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1 a, a high-rise building 100 is constructed on the ground 108.

  In the building 100, a pile (not shown) made of concrete or the like is formed in the vertical direction of the ground 108, and a column part 102 composed of a plurality of columns and a plurality of beams 104 are assembled and fixed on the pile. Built.

  In addition, a truss structure portion 106 is provided as a reinforcing portion against shaking or the like in a part of the hierarchy of the building 100.

  As shown in FIG. 1 b, the truss structure portion 106 includes an upper chord material 110 extending in a substantially horizontal direction, a lower chord material 112 disposed below the upper chord material 110 in parallel with the upper chord material 110, and an upper chord material 110. One end is fixed to the approximate center of the lower chord material 112 and the other end is fixed to the approximate center of the lower chord material 112. And a pillar material 116.

  The upper chord member 110, the lower chord member 112, the diagonal member 114, and the column member 116 are fastened by bolts and nuts (not shown), respectively.

  One end of the upper chord member 110 is fastened to a connection plate 118 projecting outward from the side surface of the column portion 102 by bolts and nuts (not shown). One end of the lower chord member 112 is fastened to a connection plate 120 projecting outward from the side surface of the column portion 102 on the lower side of the connection plate 118 by bolts and nuts (not shown).

  Here, a part of the lower chord material 112 is provided with a friction damper 10 that generates a frictional force to control the building 100 (see FIG. 1a).

  As shown in FIGS. 2a and 2b, the friction damper 10 mainly includes a plate member 12 made of a steel plate, a sliding member 14 attached to the plate member 12, and a relative movement of the plate member 12 between the sliding member 14. It is comprised with the other party plates 16 and 18 which generate a frictional force.

  One end of the plate 12 is sandwiched between a pair of presser plates 20 and 22 made of a steel plate together with the tip of the connecting plate 120 (see FIG. 1).

  The presser plate 20, the connecting plate 120, the plate member 12, and the presser plate 22 are formed with through holes 24 and 25 that penetrate from the upper surface of the presser plate 20 to the lower surface of the presser plate 22. Bolts 30 are inserted into the through holes 24 and 25 and fastened with nuts 32, whereby one end of the plate 12 is fixed to the connection plate 120.

  On the upper surface and the lower surface from the substantially central portion of the plate material 12 to the other end, a plate-like sliding material 14 made of a fluorine-based resin or a phenol resin is provided at a plurality of locations at predetermined intervals along the upper surface and the lower surface of the plate material 12. It is pasted.

  The sliding material 14 is affixed or screwed to the plate 12 with an adhesive, but a liner (backing material) made of a back metal is attached to the back side of the sliding material 14, and this liner is used as the plate 12. It may be attached to a groove portion that has been cut into two or pasted or screwed. By doing in this way, local stress concentration to the sliding material 14 can be relieved.

  The lower surface or upper surface of a pair of mating plates 16 and 18 arranged in parallel with a predetermined distance between them is in contact with the upper surface or lower surface of each sliding member 14.

  From the one end of the mating plates 16 and 18 to the substantially central part, it abuts against the sliding material 14. Further, the other ends of the mating plates 16 and 18 constitute a part of the lower chord material 112 (see FIG. 1) and are in contact with the upper and lower surfaces of the connecting plate 122 provided near the center portion. 122 is sandwiched.

  In the mating plate 16, the connection plate 122, and the mating plate 18, through holes 40 and 41 that penetrate from the upper surface of the mating plate 16 to the lower surface of the mating plate 18 are formed. Bolts 34 are inserted into the through holes 40 and 41 and fastened with nuts 36, whereby one end of the mating plate 16 and the mating plate 18 is fixed to the connection plate 122.

  With the above configuration, the plate material 12 and the sliding material 14 move together, the mating plates 16 and 18 slide and move on the upper surface or the lower surface of the sliding material 14, and the plate material 12 and the mating plates 16 and 18 move relative to each other. It is possible.

  The mating plates 16 and 18 are made of iron plates having a thermal conductivity (λ) of 80 W / m · K · second or more and a thickness (t) of 1.9 cm. The mating plates 16 and 18 may be aluminum, brass, or copper.

  Here, selection of the material of the mating plates 16 and 18 and the plate thickness t will be described.

  The plate thickness t of the mating plates 16 and 18 is determined in consideration of local thermal diffusion of the mating plates 16 and 18 due to the elapsed time.

  The temperature rise during the earthquake behavior of the friction damper 10 includes the heat storage due to the heat capacity of the friction damper 10 as a whole, the heat storage due to the local heat capacity of the counter plates 16 and 18 for evaluating the temperature rise, and the average of the friction damper 10 as a whole due to the elapsed time. It can be expressed by the regression equation (1), governed by general thermal diffusion and local thermal diffusion of the mating plates 16 and 18 due to elapsed time.

ここで、ΔＫ：温度上昇（Ｋ）、Ｗ：発生熱量（Ｊ）、τ：経過時間（ｓｅｃ）、Ｑ：摩擦ダンパーの熱容量（Ｊ／Ｋ）、λ：相手板の熱伝導率（Ｗ／ｍ・Ｋ）、ｔ：温度上昇を評価する相手板の板厚（ｍ）、Ｑ´１：温度上昇を評価する板材の熱容量（Ｊ／Ｋ）、α１〜α４：回帰係数である。

Here, ΔK: temperature rise (K), W: generated heat (J), τ: elapsed time (sec), Q: heat capacity of friction damper (J / K), λ: thermal conductivity (W / m · K), t: plate thickness (m) of the counterpart plate for evaluating the temperature rise, Q′1: heat capacity (J / K) of the plate material for evaluating the temperature rise, α1 to α4: regression coefficient.

  Since the equation (1) is a regression equation for determining the sizes of the mating plates 16 and 18 and the friction damper 10 with the material shape of the sliding material 14 as a given condition, the sliding material 14 is not used as a parameter. The regression coefficient of equation (1) is determined for each material shape configuration of the sliding material 14.

  The first term on the right side of equation (1) shows the situation where heat diffuses over time, and the second term shows the situation where local heat diffuses due to the plate thickness and thermal conductivity of the evaluation target part in addition to the passage of time. The 3rd term and the 4th term express the situation where heat is constantly accumulated by the local and the whole heat capacity.

  For the friction damper 10, based on the time history of the amount of heat generated by repeated tests taking into account the long-time earthquake response and the analysis results using the mating plates 16 and 18 as parameters, the following regression coefficients, for example: An example is obtained.

  The evaluation point of the temperature rise is the center point of the surface of the mating plates 16 and 18 that are in contact with the sliding material 14, and the temperature at that point can be regarded as the temperature of the sliding material 14 that is in contact. At the time of regression, the temperature rise at an elapsed time of 40 seconds (10 cycles) for which performance stability with respect to a short-time earthquake response is designed, and an elapsed time of 300 seconds (to be designed for soundness against a long-time earthquake response) ( (75 cycles).

  When the sliding material 14 is made of fluororesin having a thickness of 1 mm (back metal thickness of 1 mm) and the heat capacity of the entire damper is used as Q, α1 = 27.05, α2 = 6.660, α3 = 0. 01188, α4 = 0.3950.

  On the other hand, when the total heat capacity of the mating plates 16 and 18 is used as Q, α1 = 11.90, α2 = 3.525, α3 = 0.01150, and α4 = 0.1997.

  Here, the correlation coefficients are 0.935 and 0.939, respectively, which are almost equal, so the heat capacity of the entire damper is used as Q.

  From the configuration of the regression equation (1), the heat capacity Q of the friction damper 10 as a whole is improved as a factor effective in suppressing the temperature rise of the friction damper 10 (first term, second term, fourth term). And improving the heat capacity Q′1 of the plate 12 for evaluating the temperature rise (third term), and promoting local thermal diffusion of the plate 12 for evaluating the temperature rise (second term).

  The heat capacity Q of the entire friction damper 10 is expressed by equation (2).

ここで、Ｃｉ：ｉ部分の材料の比熱容量（Ｊ／ｋｇ・Ｋ）、ρｉ：ｉ部分の材料の密度（ｋｇ／ｍ^３）、Ｖｉ：ｉ部分の体積（ｍ^３）である。

Here, Ci: specific heat capacity (J / kg · K) of the material of the i portion, ρi: density of the material of the i portion (kg / m ³ ), and Vi: volume of the i portion (m ³ ).

  Table 1 shows specific heat capacities and densities of main metal materials.

比熱容量と密度の積は、アルミニウムが他の金属材料に比べやや小さいことを除けば、材料による違いは殆ど無い。また、摩擦ダンパー１０全体または相手板１６、１８のサイズ（体積）を著しく大きくすることはできない。このため、摩擦ダンパー１０全体又は相手板１６、１８の熱容量を向上させることによる摩擦ダンパー１０の温度上昇の抑制は困難である（（１）式の第１項、第４項に相当）。

The product of specific heat capacity and density is almost the same as the material except that aluminum is slightly smaller than other metal materials. Further, the size (volume) of the entire friction damper 10 or the counter plates 16 and 18 cannot be remarkably increased. For this reason, it is difficult to suppress the temperature rise of the friction damper 10 by improving the heat capacity of the entire friction damper 10 or the mating plates 16 and 18 (corresponding to the first and fourth terms of the equation (1)).

  On the other hand, the effect of suppressing the temperature rise of the friction damper 10 due to the heat capacity Q′1 of the plate material 12 represents the steady accumulation of heat from the form of the equation, and suppresses the temperature rise with time of the earthquake response. It can be seen that this is not a term (corresponding to the third term in equation (1)).

  Therefore, in order to suppress the temperature rise of the friction damper 10 with the lapse of time of the earthquake response, it is effective to promote local thermal diffusion of the plate material 12 for evaluating the temperature rise (Equation (1)). Equivalent to the second term).

  Here, Table 2 shows the thermal conductivity λ of main metal materials.

材料によって熱伝導率は大きく異なる。相手板１６、１８としてよく使われるステンレスに対して、鉄は約５倍、銅は２０倍以上の数値であり、材料の違いが有意な差となることが分かる。

The thermal conductivity varies greatly depending on the material. Compared to stainless steel often used as the mating plates 16 and 18, the value of iron is about 5 times and the value of copper is 20 times or more.

  By substituting appropriate values for λ and t, the coefficient of the second term of equation (1) is obtained as shown in Table 3. Note that λ in Table 3 is a value obtained by engineering the numerical values in Table 2 in engineering.

前述のように、平均的な熱拡散に関わる第１項の係数は２７．０５／τであるので、８０Ｗ／ｍ・Ｋ程度以上の熱伝導率λを有する材料を用い、板厚ｔを適切に選ぶことで、（１）式の第２項の係数を、第１項に比べて十分小さくできる。すなわち、相手板１６、１８の局所的な熱の集中が速やかに緩和され、平均的な熱拡散の状態に近づけることができる。

As described above, since the coefficient of the first term related to the average thermal diffusion is 27.05 / τ, a material having a thermal conductivity λ of about 80 W / m · K or more is used, and the thickness t is appropriately set. The coefficient of the second term in the equation (1) can be made sufficiently smaller than that of the first term. That is, the local heat concentration of the mating plates 16 and 18 can be quickly relieved and brought close to an average thermal diffusion state.

  Table 4 shows an example of setting the temperature rise criteria for a resin-based sliding material typically used as the sliding material 14 of the friction damper 10. Based on the regression formula (1), the material and thickness of the mating plates 16 and 18 may be determined so as to satisfy the temperature rise criteria.

なお、表５に、樹脂の厚さを１ｍｍとしたときの熱伝導率λ、板厚ｔ、経過時間τ、各熱容量、発生熱量Ｗ、温度上昇ΔＫの値を示す。また、表６に、樹脂の厚さを２ｍｍとしたときの熱伝導率λ、板厚ｔ、経過時間τ、各熱容量、発生熱量Ｗ、温度上昇ΔＫの値を示す。

Table 5 shows the values of thermal conductivity λ, plate thickness t, elapsed time τ, heat capacity, generated heat W, and temperature rise ΔK when the resin thickness is 1 mm. Table 6 shows the values of thermal conductivity λ, plate thickness t, elapsed time τ, heat capacity, generated heat W, and temperature rise ΔK when the resin thickness is 2 mm.

  When the thickness of the resin is larger than 1 mm, the value of the temperature rise becomes large especially when the plate thickness is small. Therefore, the thickness of the resin is desirably 1 mm or less.

次に、本発明の第１実施形態の作用について説明する。

Next, the operation of the first embodiment of the present invention will be described.

  FIG. 3 shows a state of relative movement between the plate 12 and the counterpart plates 16 and 18. In FIG. 3, for the convenience of explanation, the movement amount of the plate 12 is shown with the counterpart plates 16 and 18 as a reference (fixed).

  As shown in FIG. 3a, when the building 100 (see FIG. 1) is not shaken by an earthquake or the like, the plate 12 and the counterpart plates 16 and 18 are stationary.

  Subsequently, as shown in FIG. 3 b, when a shaking such as an earthquake occurs and the plate member 12 moves relative to the counterpart plates 16 and 18 in the arrow −X direction at a distance d <b> 1, the sliding member 14 is integrated with the plate member 12. To move in the arrow -X direction. For this reason, a frictional force is generated at the interface (friction surface) between the sliding material 14 and the mating plates 16 and 18.

  When this frictional force is F1, the vibration energy of shaking is attenuated by an energy corresponding to F1 × d1.

  Subsequently, as shown in FIG. 3c, when the plate member 12 moves relative to the counterpart plates 16 and 18 in the arrow + X direction from the position d1 by the distance d2, the sliding member 14 is integrated with the plate member 12 in the arrow + X direction. Moving. For this reason, a frictional force is generated at the interface between the sliding material 14 and the mating plates 16 and 18.

  This frictional force is a force whose magnitude is approximately equal to F1 and opposite in direction. Assuming that this is F2, the vibration energy of the vibration is attenuated by the energy corresponding to F2 × d2.

  Thus, the vibrational energy of the vibration is gradually attenuated by the frictional force F1 or F2 generated on the friction surface between the sliding material 14 and the mating plates 16 and 18, and the building 100 is controlled.

  Here, when a frictional force is generated on the friction surface between the sliding material 14 and the mating plates 16 and 18, the sliding material 14 or the mating plates 16 and 18 generate heat due to frictional energy.

  When the frictional force is large, the attenuation amount of the vibration energy increases, but on the other hand, the heat generation amount of the sliding material 14 increases. If this calorific value is too large, the sliding material 14 will be easily melted and destroyed, or it will be altered and the frictional force of the friction surface will be reduced.

  However, in this embodiment, the counter plates 16 and 18 are iron plates having a thermal conductivity of 80 W / m · K · second or more and a thickness of 1.9 cm, and the degree of local thermal diffusion is average. It is sufficiently larger than the degree of thermal diffusion. Accordingly, heat generated on the friction surface between the sliding material 14 and the mating plates 16 and 18 is quickly dissipated to the building 100 through the mating plates 16 and 18 and the connection plate 122.

  For this reason, the sliding material 14 is not altered by heat. Further, the friction force does not decrease for a short-time earthquake response, and the sliding material 14 does not melt or break for a long-time earthquake response. Can be maintained.

  Furthermore, since the sliding material 14 is comprised with the fluorine-type resin or the phenol resin, and it becomes difficult to change in quality with a heat | fever, the damping effect of a friction damper can be maintained.

  Next, a second embodiment of the friction damper of the present invention will be described with reference to the drawings. Note that the same reference numerals as those in the first embodiment are given to the same elements as those in the first embodiment described above, and the description thereof is omitted.

  FIG. 4 a shows a cross section of a multi-stage friction damper 50. The friction damper 50 is provided in a part of the lower chord material 112 (see FIG. 1) of the building 100 described above.

  As shown in FIG. 4a, the friction damper 50 is relatively moved relative to the plate members 52, 54, 56 made of steel plates, the sliding member 55 attached to the plate members 52, 54, 56, and the plate members 52, 54, 56. The mating plates 58, 60, 62, and 64 generate frictional force with the sliding material 55.

  One end of the plate 54 is sandwiched between a pair of presser plates 129 and 131 made of a steel plate together with the tip of the connection plate 120 described above. The presser plate 129, the connection plate 120, and the presser plate 131 have through holes 135 and 136 that penetrate from the upper surface of the presser plate 129 to the lower surface of the presser plate 131. The presser plates 129 and 131 are fixed to the connection plate 120 by inserting bolts 133 into the through holes 135 and 136 and fastening with the nuts 134.

  The presser plates 129 and 131 are sandwiched between a pair of presser plates 66 and 68 made of a steel plate. Further, the holding plates 66 and 68 are sandwiched between the plate materials 52 and 56.

  Here, the plate member 52, the presser plate 66, the presser plate 129, the plate member 54, the presser plate 131, the presser plate 68, and the plate member 56 are formed with through holes 70 and 71 that penetrate from the upper surface of the plate member 52 to the lower surface of the plate member 56. Has been. Bolts 72 are inserted into the through holes 70 and 71 and fastened with nuts 74, whereby one end of the plate materials 52, 54 and 56 is fixed to the connection plate 120.

  On the upper surface and the lower surface of the plate members 52, 54, and 56 from the substantially central portion to the other end, a plate-like sliding member 55 made of a laminated resin based on a fluororesin or a phenol resin is provided on the plate member 52. , 54 and 56 are attached to a plurality of locations at predetermined intervals along the upper and lower surfaces.

  The sliding material 55 is affixed or screwed to the plate materials 52, 54, and 56, but a liner (backing material) made of a back metal is affixed to the back side of the sliding material 55. The liner may be affixed or screwed after being fitted into a groove cut into the plate materials 52, 54, and 56. By doing in this way, local stress concentration to the sliding material 55 can be relieved.

  The lower surface or upper surface of the mating plates 58, 60, 62, 64 arranged parallel to each other with a predetermined distance between the plate members 52, 54, 56 are in contact with the upper surface or the lower surface of each sliding member 55.

  From one end of the mating plates 58, 60, 62, 64 to the substantially central portion, the sliding plate 55 is in contact. The other ends of the mating plates 60 and 62 are in contact with the upper and lower surfaces of the connection plate 122 described above, and sandwich the connection plate 122.

  The mating plates 60 and 62 are sandwiched between a pair of pressing plates 78 and 80 made of steel plates. Further, the presser plates 78 and 80 are sandwiched between the plate members 58 and 64.

  Here, the mating plate 58, the presser plate 78, the mating plate 60, the connection plate 122, the mating plate 62, the presser plate 80, and the mating plate 64 have through holes that penetrate from the upper surface of the mating plate 58 to the lower surface of the mating plate 64. 76 and 77 are formed. Bolts 82 are inserted into the through holes 76 and 77 and fastened with nuts 84, whereby the other ends of the mating plates 58, 60, 62, and 64 are fixed to the connection plate 122.

  With the above configuration, the plate members 52, 54, 56 and the sliding member 55 formed in multiple stages move together, and the mating plates 58, 60, 62, 64 slide on the upper or lower surface of the sliding member 55. Thus, the plate members 52, 54, 56 and the mating plates 58, 60, 62, 64 can be moved relative to each other.

  The mating plates 58, 60, 62, and 64 are made of iron plates having a thermal conductivity (λ) of 80 W / m · K · sec or more and a thickness (t) of 1.9 cm. The mating plates 58, 60, 62, 64 may be aluminum, brass, or copper.

  Next, the operation of the second embodiment of the present invention will be described.

  4a to 4c show a state of relative movement between the plate members 52, 54, and 56 and the mating plates 58, 60, 62, and 64. FIG. For the convenience of explanation, the movement amounts of the plate members 52, 54, and 56 are shown with the counterpart plate 58, 60, 62, and 64 side as a reference (fixed).

  As shown in FIG. 4a, when the building 100 (see FIG. 1) is not shaken such as an earthquake, the plate members 52, 54, 56 and the counterpart plates 58, 60, 62, 64 are stationary.

  Subsequently, as shown in FIG. 4b, when a vibration such as an earthquake occurs and the plate members 52, 54, 56 move relative to the counterpart plates 58, 60, 62, 64 in the direction of the arrow -X with a distance d3, slipping occurs. The material 55 moves together with the plate materials 52, 54, and 56 in the direction of the arrow -X. For this reason, a frictional force is generated at the interface (friction surface) between the sliding material 55 and the mating plates 58, 60, 62, 64.

  When this frictional force is F3, the vibration energy of shaking is attenuated by an energy corresponding to F3 × d3.

  Subsequently, as shown in FIG. 4 c, when the plate members 52, 54, and 56 move with respect to the counterpart plates 58, 60, 62, and 64 in the arrow + X direction from the position of d <b> 3 at a distance d <b> 4, the sliding member 55 is changed to the plate member 52. , 54 and 56 move in the direction of the arrow + X. For this reason, a frictional force is generated at the interface between the sliding material 55 and the mating plates 58, 60, 62, 64.

  This friction force is a force having a magnitude approximately equal to F3 and opposite in direction. If this is F4, the vibration energy of the vibration will be attenuated by the energy corresponding to F4 × d4.

  Thus, the vibrational energy of the vibration is gradually attenuated by the frictional force F3 or F4 generated on the friction surface between the sliding material 55 and the mating plates 58, 60, 62, 64, and the building 100 is controlled.

  Here, when a frictional force is generated on the friction surface between the sliding material 55 and the mating plates 58, 60, 62, 64, the sliding material 55 or the mating plates 58, 60, 62, 64 generates heat due to the frictional energy.

  When the frictional force is large, the attenuation amount of the vibration energy increases, but on the other hand, the heat generation amount of the sliding material 55 increases. If this calorific value is too large, the sliding material 55 will be easily melted and destroyed, or it will be altered and the frictional force of the friction surface will be reduced.

  However, in this embodiment, an iron plate having a thermal conductivity of 80 W / m · K · sec and a thickness of 1.9 cm is used as the mating plates 58, 60, 62, 64, and the extent of local thermal diffusion Is sufficiently larger than the average degree of thermal diffusion. As a result, heat generated on the friction surface between the sliding material 55 and the mating plates 58, 60, 62, 64 is promptly transmitted to the building 100 through the mating plates 58, 60, 62, 64 and the connection plate 122. To dissipate.

  For this reason, the sliding material 55 is not altered by heat. Further, the friction force does not decrease for a short-time earthquake response, and the sliding material 55 does not melt or break for a long-time earthquake response. Can be maintained.

  Furthermore, since the multi-stage friction surface is formed by laminating a plurality of the plate materials 52, 54, 56, the sliding material 55, and the mating plates 58, 60, 62, 64, the friction area per step can be reduced. it can. Thereby, the friction damper 50 can be made compact, and the friction damper 50 can be installed in the building 100 even if the gap between the connection plate 120 and the connection plate 122 is narrow.

  In addition, this invention is not limited to said embodiment.

  The friction dampers 10 and 50 may be disposed not only so that the friction surface between the plate member and the sliding member is substantially perpendicular to the ground but also substantially parallel.

  Further, the friction dampers 10 and 50 may be provided on the beam portion 104 of the building 100.

  The number of plate members and mating plates can be selected as appropriate from a single sheet, three sheets, and four sheets, as well as a plurality of sheets. Moreover, the thickness of a board | plate material and the other party board may be the same, and one side may be thick.

  The sliding material is not only provided at three locations along the moving direction of the plate material, but a sliding material having a large area may be attached at one location, or may be attached at two or more locations.

(A) It is a general view of the building in which the friction damper which concerns on 1st Embodiment of this invention was provided. (B) It is the elements on larger scale of the building in which the friction damper which concerns on 1st Embodiment of this invention was provided. (A) It is a front view of the friction damper which concerns on 1st Embodiment of this invention. (B) It is sectional drawing of the friction damper which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the movement state of the friction damper which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the movement state of the friction damper which concerns on 2nd Embodiment of this invention.

Explanation of symbols

10 Friction damper (friction damper)
12 Plate material (plate material)
14 Sliding material (sliding material)
16 Mating plate (mating plate material)
18 Mating plate (Mating plate material)
50 Friction damper (Friction damper)
52 Plate (Plate)
54 Plate material (plate material)
55 Sliding material (sliding material)
56 Plate (Plate)
58 Mating plate (Mating plate material)
60 Mating plate (mating plate material)
62 Mating plate (mating plate material)
64 Mating plate (Mating plate material)
100 Building 120 Connection board (one building structure)
122 Connection board (other building structures)

Claims (5)

A plate attached to a single building structure;
A sliding material fixed to the plate,
Abutting against the sliding material, attached to another building structure that moves relative to the one building structure, a mating plate material having a thermal conductivity of 80 W / m · K · sec or more,
A friction damper, characterized by comprising:   2. The thickness of the mating plate material is determined in consideration of thermal diffusion of the mating plate material due to an elapsed time during which one building structure and another building structure are moving relative to each other. Friction damper.   The friction according to claim 1 or 2, wherein the sliding material is made of fluorine resin or phenol resin having a thickness of 1 mm or less, and a backing material made of a back metal is attached. Damper.   The friction damper according to any one of claims 1 to 3, wherein a groove portion is formed in the plate material, and the sliding material is fitted into the groove portion. Provide a plurality of the plate material that fixed the sliding material on both sides up and down,
The mating plate material is inserted between the sliding materials fixed to the plate materials arranged above and below to be brought into contact with the sliding material, and the mating plate material in contact with the uppermost sliding material and the lowermost plate material The friction damper according to any one of claims 1 to 4, wherein the mating plate material that abuts against a sliding material is provided.

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