US20080295420A1 - Frame damper bracing - Google Patents
Frame damper bracing Download PDFInfo
- Publication number
- US20080295420A1 US20080295420A1 US12/156,141 US15614108A US2008295420A1 US 20080295420 A1 US20080295420 A1 US 20080295420A1 US 15614108 A US15614108 A US 15614108A US 2008295420 A1 US2008295420 A1 US 2008295420A1
- Authority
- US
- United States
- Prior art keywords
- pane
- pair
- brake
- apex
- anchored
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/028—Earthquake withstanding shelters
Definitions
- Plural-story building frames formed with nodally interconnected columns and beams, which define generally rectangular frame planes, experience in such frame planes parallelogram relative-motion distortion as columns bend and beams shift laterally and elastically, i.e., within their respective design limits, relative to one another in the event of a frame-experienced load-force, which is created by ground movement triggered by, for example, an earthquake.
- Full-moment nodal connections functionable to handle the usually expected earthquake event which creates such frame distortion and resulting swaying movement, and which are designed normally to exert appropriate restoring forces that act to return a frame to its undistorted condition following a natural condition of progressive diminishing oscillating, elastic sway are not particularly effective to dissipate the energy associated with distortional forces within a building frame.
- This same energy-dissipation limitation is also true of conventional, generally triangular anti-earthquake structures provided for, and extending between, the horizontally disposed beams of a building frame.
- a damper brace for use in a rectangular structural building frame pane which pane is defined by interconnecting beams and columns includes a formed rigid triangle having an apex, and a force-adjustable, relative-motion braking structure operatively interposed the rigid-triangle apex and one of the frame beams forming the pane.
- FIG. 1 is a side elevation of a dampening structure of the invention incorporated into a building frame, with portions broken away to show detail, and with conventional structural components represented in a somewhat schematic form.
- FIG. 2 is an end-view of a portion of the dampening structure of FIG. 1 .
- the instant invention augments nodal column/beam connections in a building frame, adding additional bracing, and introducing friction-based, relative-motion, energy-dissipation, by including, within a particular rectangle (or particular rectangles) of a design-selected building-frame pane, a rigid triangular brace which is formed by a pair of upwardly and inwardly inclined rigid legs, whose lower ends are anchored effectively to, and near, the opposites ends of a lower beam in such a pane, and whose upper ends effectively define an upper apex in the brace.
- the brace is upper-apex-connected to the underside of the relevant overhead beam through a clamping style, clamping-force-adjustable, friction-based, brake-shoe structure, which creates a relative-motion energy-damping connection.
- a building frame is depicted generally at 10 , and includes spaced columns and I-beams, such as left column 12 , right column 14 , upper beam 16 and lower beam 18 , which pane columns and pane beams form a building frame pane 20 .
- the corners of the pane include full-moment nodal connections 22 , 24 , 26 28 between the respective columns and beams for each pane, wherein the columns and beams are anchored to one another at the nodal connections.
- a damper brace 30 is formed within each pane 20 of a building constructed according to the invention.
- the damper brace includes a pair of elongate, upwardly and inwardly (relative to the pane's lateral sides) inclined legs 32 , 34 .
- the lower end 32 a, 34 a of each leg is anchored to an anchor or attachment point 36 , 38 , respectively, to lower beam 18 of pane 20 , adjacent the nodal points 26 , 28 of connection between lower beam 18 and columns 12 , 14 for the pane.
- An upper end 32 b, 34 b of each leg forms a rigid triangle apex 30 a of rigid triangle 30 which is located generally centrally below upper beam 16 of each pane, and is attached by suitable fasteners to a brake mechanism 40 , and specifically to a lower brake plate 42 thereof.
- Brake mechanism 40 seen in detail in FIGS. 2 , includes the aforementioned lower brake plate 42 , an upper brake plate 44 fixed to a flange 16 a of upper beam 16 , and planarly disposed generally above lower brake plate 42 , a pair of brake shoes 46 , 48 disposed on opposing sides of brake plates 42 , 44 , and a pair of clamping plates 50 , 52 disposed on either side of the brake shoes.
- Two adjustable nut-and-bolt assemblies 54 extend through clamping plates 50 , 52 , intermediate brake shoes 46 , 48 , providing force-adjustable clamping for adjusting the damping characteristics of the damper brace and the brake mechanism.
- Brake shoes 46 , 48 have cut-outs therein to facilitate insertion of nut-and-bolt assemblies 54 .
- Clamping-force adjustments which may be screw-thread implemented, are made, per predetermined design parameters, at the time of building frame construction by torque adjustments to nut-and-bolt assemblies 54 .
Abstract
Description
- This Application is related to and claims priority from U.S. Provisional Patent Application Ser. No. 60/932,487, filed May 30, 2007, for Frame Damper Bracing, the entire contents of which are incorporated herein by reference.
- Plural-story building frames formed with nodally interconnected columns and beams, which define generally rectangular frame planes, experience in such frame planes parallelogram relative-motion distortion as columns bend and beams shift laterally and elastically, i.e., within their respective design limits, relative to one another in the event of a frame-experienced load-force, which is created by ground movement triggered by, for example, an earthquake. Full-moment nodal connections functionable to handle the usually expected earthquake event which creates such frame distortion and resulting swaying movement, and which are designed normally to exert appropriate restoring forces that act to return a frame to its undistorted condition following a natural condition of progressive diminishing oscillating, elastic sway are not particularly effective to dissipate the energy associated with distortional forces within a building frame. This same energy-dissipation limitation is also true of conventional, generally triangular anti-earthquake structures provided for, and extending between, the horizontally disposed beams of a building frame.
- A damper brace for use in a rectangular structural building frame pane which pane is defined by interconnecting beams and columns includes a formed rigid triangle having an apex, and a force-adjustable, relative-motion braking structure operatively interposed the rigid-triangle apex and one of the frame beams forming the pane.
- It is an object of the invention to provide an energy-dissipative bracing structure which dampens distortional forces generated as the result of an earth movement event.
- This summary and object of the invention are provided to enable quick comprehension of the nature of the invention. A more thorough understanding of the invention may be obtained by reference to the following detailed description of the preferred embodiment of the invention in connection with the drawings.
-
FIG. 1 is a side elevation of a dampening structure of the invention incorporated into a building frame, with portions broken away to show detail, and with conventional structural components represented in a somewhat schematic form. -
FIG. 2 is an end-view of a portion of the dampening structure ofFIG. 1 . - The instant invention augments nodal column/beam connections in a building frame, adding additional bracing, and introducing friction-based, relative-motion, energy-dissipation, by including, within a particular rectangle (or particular rectangles) of a design-selected building-frame pane, a rigid triangular brace which is formed by a pair of upwardly and inwardly inclined rigid legs, whose lower ends are anchored effectively to, and near, the opposites ends of a lower beam in such a pane, and whose upper ends effectively define an upper apex in the brace. The brace is upper-apex-connected to the underside of the relevant overhead beam through a clamping style, clamping-force-adjustable, friction-based, brake-shoe structure, which creates a relative-motion energy-damping connection.
- Referring now to the drawings, a building frame is depicted generally at 10, and includes spaced columns and I-beams, such as
left column 12,right column 14,upper beam 16 andlower beam 18, which pane columns and pane beams form abuilding frame pane 20. The corners of the pane include full-momentnodal connections - Within each
pane 20 of a building constructed according to the invention, adamper brace 30 is formed. The damper brace includes a pair of elongate, upwardly and inwardly (relative to the pane's lateral sides)inclined legs lower end attachment point lower beam 18 ofpane 20, adjacent thenodal points lower beam 18 andcolumns rigid triangle apex 30 a ofrigid triangle 30 which is located generally centrally belowupper beam 16 of each pane, and is attached by suitable fasteners to abrake mechanism 40, and specifically to alower brake plate 42 thereof. -
Brake mechanism 40, seen in detail inFIGS. 2 , includes the aforementionedlower brake plate 42, anupper brake plate 44 fixed to aflange 16a ofupper beam 16, and planarly disposed generally abovelower brake plate 42, a pair ofbrake shoes brake plates clamping plates bolt assemblies 54 extend throughclamping plates intermediate brake shoes Brake shoes bolt assemblies 54. - Clamping-force adjustments, which may be screw-thread implemented, are made, per predetermined design parameters, at the time of building frame construction by torque adjustments to nut-and-
bolt assemblies 54. - With respect to whatever design-tolerance lateral forces, such as seismic forces, may readily be handled without frame damage by the particular column/beam nodal connections in existence in
frame 10, as assisted by the additional bracing provided by the rigid-triangle structure of this invention, those forces will also be appropriately managed without any relative-motion disturbance occurring inmechanism 40. - However, in the event of a sufficiently large, frame-experienced load-force, as from an especially strong seismic event, such as the large seismic-induced force illustrated schematically at 56 in
FIG. 1 , a parallelogram-type pane-distortion-displacement 58 takes place which is large enough to overcome frictional resistance furnished withinbrake mechanism 40. When this happens, relative motion, to the extent dictated by the level of the seismic force involved, then takes place betweenlower brake plate 42 andupper brake plate 44, and heating and resulting energy dissipation occur withinmechanism 40 further to resist and tame the strong bending moments then present inpane 20. With appropriate engineering design in the structure ofmechanism 40, and preferably, initial overall displacement motion of this character, accompanied by frictional energy dissipation withinmechanism 40, the components inframe pane 20 remain within their elastic limits, in other words, to experience only elastic parallelogram distortion. This design consideration is, of course, acted upon with the best knowledge available regarding the expected maximum force and deflection which is anticipated will happen in a particular building-frame location. In the practice of the invention, the particular frame panes wherein the structure of the invention is to be used is entirely a matter of designer choice. - When a building frame utilizing this invention undergoes such elastic, parallelogram distortion, their occurs a resulting oscillating sway in the frame which is quickly dampened by the relative-motion, energy-consuming, frictional clamping-brake forces that are exerted at the apices of the involved, pane-installed triangular braces—ultimately allowing the building frame pane to return to its original configuration undamaged.
- Thus, a unique frame damper brace for a building frame has been disclosed. It will be appreciated that further variations and modifications thereof may be made within the scope of the invention as defined in the appended claims.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/156,141 US20080295420A1 (en) | 2007-05-30 | 2008-05-30 | Frame damper bracing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US93248707P | 2007-05-30 | 2007-05-30 | |
US12/156,141 US20080295420A1 (en) | 2007-05-30 | 2008-05-30 | Frame damper bracing |
Publications (1)
Publication Number | Publication Date |
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US20080295420A1 true US20080295420A1 (en) | 2008-12-04 |
Family
ID=40086591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/156,141 Abandoned US20080295420A1 (en) | 2007-05-30 | 2008-05-30 | Frame damper bracing |
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US (1) | US20080295420A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014105545A (en) * | 2012-11-29 | 2014-06-09 | Asahi Kasei Homes Co | Vibration control structure |
WO2015005286A1 (en) * | 2013-07-09 | 2015-01-15 | 旭化成ホームズ株式会社 | Damping device |
US20190257107A1 (en) * | 2016-06-08 | 2019-08-22 | Murat DÍCLELÍ | Torsional hysteretic damper |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3691712A (en) * | 1969-05-13 | 1972-09-19 | Monsanto Co | Damping system |
US5349794A (en) * | 1992-03-27 | 1994-09-27 | Shimizu Construction Co., Ltd. | Wall for damping vibration |
US5533307A (en) * | 1994-11-29 | 1996-07-09 | National Science Council | Seismic energy dissipation device |
US5630298A (en) * | 1995-09-05 | 1997-05-20 | National Science Council | Shear link energy absorber |
US5845438A (en) * | 1995-05-22 | 1998-12-08 | Haskell; Gregg O. | Building damper apparatus |
US5875589A (en) * | 1996-12-10 | 1999-03-02 | Minnesota Mining And Manufacturing Company | Structures having damped floors and a method of damping floors |
US6378670B1 (en) * | 1998-12-11 | 2002-04-30 | Daido Metal Company Ltd. | Sliding member |
-
2008
- 2008-05-30 US US12/156,141 patent/US20080295420A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3691712A (en) * | 1969-05-13 | 1972-09-19 | Monsanto Co | Damping system |
US5349794A (en) * | 1992-03-27 | 1994-09-27 | Shimizu Construction Co., Ltd. | Wall for damping vibration |
US5533307A (en) * | 1994-11-29 | 1996-07-09 | National Science Council | Seismic energy dissipation device |
US5845438A (en) * | 1995-05-22 | 1998-12-08 | Haskell; Gregg O. | Building damper apparatus |
US5630298A (en) * | 1995-09-05 | 1997-05-20 | National Science Council | Shear link energy absorber |
US5875589A (en) * | 1996-12-10 | 1999-03-02 | Minnesota Mining And Manufacturing Company | Structures having damped floors and a method of damping floors |
US6378670B1 (en) * | 1998-12-11 | 2002-04-30 | Daido Metal Company Ltd. | Sliding member |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014105545A (en) * | 2012-11-29 | 2014-06-09 | Asahi Kasei Homes Co | Vibration control structure |
WO2015005286A1 (en) * | 2013-07-09 | 2015-01-15 | 旭化成ホームズ株式会社 | Damping device |
US20160138263A1 (en) * | 2013-07-09 | 2016-05-19 | Asahi Kasei Homes Corporation | Damping device |
JPWO2015005286A1 (en) * | 2013-07-09 | 2017-03-02 | 旭化成ホームズ株式会社 | Vibration control device |
US20190257107A1 (en) * | 2016-06-08 | 2019-08-22 | Murat DÍCLELÍ | Torsional hysteretic damper |
US10563417B2 (en) * | 2016-06-08 | 2020-02-18 | Murat DÍCLELÍ | Torsional hysteretic damper |
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AS | Assignment |
Owner name: CONXTECH, INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SIMMONS, ROBERT J.;REEL/FRAME:021072/0199 Effective date: 20080530 |
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AS | Assignment |
Owner name: JAMES D. WARREN, AS TRUSTEE OF THE MATILDA TRUST, Free format text: SECURITY AGREEMENT;ASSIGNOR:CONXTECH, INC.;REEL/FRAME:026035/0257 Effective date: 20110325 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
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AS | Assignment |
Owner name: CONXTECH, INC., CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JAMES D. WARREN, AS TRUSTEE OF THE MATILDA TRUST, AS COLLATERAL AGENT;REEL/FRAME:031186/0965 Effective date: 20130910 |
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Owner name: AVIDBANK, CALIFORNIA Free format text: SECURITY INTEREST;ASSIGNORS:CONXTECH, INC.;SMRSF LLC;CONXTECH CONSTRUCTION, INC.;REEL/FRAME:047935/0187 Effective date: 20181207 |
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AS | Assignment |
Owner name: CONXTECH CONSTRUCTION INC., CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:AVIDBANK;REEL/FRAME:051439/0336 Effective date: 20200107 Owner name: CONXTECH, INC., CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:AVIDBANK;REEL/FRAME:051439/0336 Effective date: 20200107 Owner name: SMRSF, LLC, CALIFORNIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:AVIDBANK;REEL/FRAME:051439/0336 Effective date: 20200107 |