CA2592710A1 - Composite energy absorbing structure - Google Patents
Composite energy absorbing structure Download PDFInfo
- Publication number
- CA2592710A1 CA2592710A1 CA002592710A CA2592710A CA2592710A1 CA 2592710 A1 CA2592710 A1 CA 2592710A1 CA 002592710 A CA002592710 A CA 002592710A CA 2592710 A CA2592710 A CA 2592710A CA 2592710 A1 CA2592710 A1 CA 2592710A1
- Authority
- CA
- Canada
- Prior art keywords
- shear wall
- structural member
- wall panel
- floor slab
- absorbing structure
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Load-Bearing And Curtain Walls (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
A composite structure including a shear wall panel having at least one horizontally-disposed structural member at least partially embedded in a floor slab such that horizontal forces exerted on the floor slab are transferred to the shear wall panel through the structural member.
Description
COMPOSITE ENERGY ABSORBING STRUCTURE
FIELD OF THE INVENTION
[001] The present invention relates to an energy absorbing structure which is constructed to transfer horizontal forces from floor slabs to shear wall panels to permit buildings to withstand earthquakes and other forces exerted on them.
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
[001] The present invention relates to an energy absorbing structure which is constructed to transfer horizontal forces from floor slabs to shear wall panels to permit buildings to withstand earthquakes and other forces exerted on them.
BACKGROUND OF THE INVENTION
[002] Earthquakes exert lateral and vertical forces on a building, and fabricating a structure that tivill withstand these random, often sudden forces is a complex task. When designing an earthquake-resistant building, engineers can choose various structural components, such as shear walls, braced frames, moment resisting frames, diaphragms and horizontal trusses. These building elements impart earthquake resistant structures with the ability to resist and sometimes to absorb and dissipate seismically induced motion through a combination of means, including damping means which absorbs energy and decreases the amplitude of oscillations of a vibrating structure and inelastic defoi-mation means which can withstand considerable inelastic deformation. The structural elements can be used alone or in combination to achieve the necessary sti-ength and energy absorption and dissipation.
[003] Shear walls at-e an example of a structural element used in earthquake resistance structures. A shear wall is a vertical element in a building lateral load resisting system that transfers horizontal forces vertically downward from a diaphragm -ibove to a diapliragm or a foundation below. Thus, horizontal wind or seismic forces are collected at floor or roof diaphragm levels and transferred to the building foundation by the strength and rigidity of the shear walls. In a lateral load resisting system, concrete floor slabs often act as diaphragms, and thus the connection between the floor slabs and the shear wall panels is critical for effective transference of lateral forces. In this regard, the stronger the connection between the shear wall panels and the floor slabs, the more effective the entire lateral load resisting system will be in transferring lateral loads to the foundation.
[004] Accordingly, there is a need for a means to provide a strong connection between floor slabs and shear wall panels in a building lateral load resisting system to improve the effectiveness of the system in transferring lateral loads to the building foundation.
StIMMARY OF THE INVENTION
StIMMARY OF THE INVENTION
[005] According to the present invention, a shear wall panel partially embedded in a floor slab transfers horizontal forces from the floor slab to the shear wall or from one floor slab to an adjacent floor slab. Specifically, a composite energy absorbing structure according to an exemplary embodiment of the present invention includes a shear wall panel having at least one horizontally-disposed structural member at least partially embedded in a floor slab such that horizontal forces exerted on the floor slab are transferred to the shear wall panel through the structural member.
[006] In at least one embodiment, the structural member includes two or more bars each having an angle shape in cross section and each having a vertical leg and a horizontal leg.
[007] The invention also encompasses a method of forming a composite structure in a building, including forming a shear wall panel having a structural member, and at least partially embedding the structural member in a floor slab, such that horizontal forces exerted on the floor slab are transferred to the shear wall panel through the structural member.
[0081 These and other features of this invention are described in, or are apparent from, the following detailed description of various exemplary embodiments of this invention BRIEF DESCRIPTION OF THE DRAWINGS
[009] Various exemPlary embodiments of this invention will be described in detail, with reference to the following figures, wherein:
[010] FIG. 1 illustrates a shear wall according to an exemplary embodiment of the present invention;
[011] FIG. 2 illustrates a shear wall according to another exemplary embodiment of the prescnt invention;
[012] FIG. 3 is a cross-sectional view along the line A-A shown in FIG. 1; and [013] FIG. 4 is a perspective view showing the shear wall of FIG. 1 including a structural member imbedded in a floor slab.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[014] The various exemplary embodiments of the present invention are directed to a shear wall that imparts buildings with the ability to withstand forces caused by, for example, earthquakes. The shear wall includes multiple shear wall panels, each including, as a component, a structural member, that transfers horizontal forces exerted on floor slabs, in which the structural member is at least partially embedded, to the shear wall panel. It should be appreciated that the various concepts of the present invention are not necessarily limited to earthquake resistant structures, but are also applicable to structures that are designed to withstand forces generated by any other factor, such as, for example, explosions or high winds. It should also be appreciated that the present invention is not limited to the particular shear wall structures expressly illustrated herein and that other shear wall structures may be used.
[015] FIG. 1 shows a shear wall panel, generally designated by reference number 10, according to an exemplary embodiment of the present invention. The shear wall panel may be one of many such panels that make up one shear wall of a building. The shear wall panel 10 is composed of a generally rectangular shaped frame including two vertically disposed frame members 12 and two horizontally disposed structural members 14. An opening 16 is defined by the frame members 12 and structural members 14 within the shear wall panel 10. The frame members 12 and structural members 14 may be attached to each other by any suitable means, such as, for example, pin joints, welding, bolts or connector elements 18.
[016] The shear wall panel also includes shear transfer means which can take any useful form. FIG. 1 shows the shear transfer means as diagonal braces 20.
Another type of shear transfer means may include a shear panel or a suitable energy absorber such as shown in FIG. 2 and described in co-pending U.S. Patent Application Serial No.
10/941,159, incorporated herein by reference. Specifically, referring to FIG.
2, the energy absorber, generally designated by reference number 21, includes a ductile member 22 and four braces 24. The braces 24 support the ductile member 22 at substantially the center of the opening 16. The ductile member 22 is formed of a ductil_e material, such as, for example, steel or aluminum. One of the ends of the braces 24 are connected to the ductile member 22 by any suitable fastening elements, such as, for example, adjustable nuts 26. The opposite ends of the braces 24 are attached to i-espective corners of the connector elements 18 by, for example, pin joints, welding or bolts. The number of braces 24 is not limited to four and any number of braces 24 can be used in the various exemplary embodiments of the invention. In the present embodiment of the invention, the braces 24 are tension rods, but can also be any other suitably rigid structural supports for the ductile element 22. Further, the ductile member 22 need not be ring-shaped, as shown in FIG. 2, but could have other shapes as would be understood by workers skilled in the art.
10171 Structural members 14 can take any useful form, for example angles or I-beams. As best seen in FIG_ 3, which is a cross-sectional view along the line A-A in FIG.
l, the structural members 14 may each include two metal bars, generally designated by reference numbers 26, 28. Such structural members are disclosed in U.S. Patent No.
4,592,184, incorporated herein by reference. Each of the bars 26, 28 have an angle shape and include a vertical leg 30 and a horizontal leg 32. The horizontal leg 32 of the bar 26 extends in the opposite direction from that in which the horizontal leg 32 of the bar 28 extends. The height of the vertical legs 30 of the bars 26, 28 are preferably the same, although in other embodiments the heights may be different. The vertical legs 30 of the two bai=s 26, 28 are spaced apart by the width of the connector elements 18.
Concrete engaging means 34 such as, for example, protrusions or slots are preferably formed at spaced intervals along the length of the vertical legs 30. It should be appreciated that the bars 26, 28 ma_y have any other suitable shape.
[018) As best shown in FIG. 4, a shear wall panel 10 is incorporated into a building structure by forming the concrete floor slab 36 in intimate contact with shear wall panel 10. In this regard, concrete may be poured such that the structural member 14 is at least partially, but preferably completely, embedded in the floor slab 36. The floor slab 36 may form a component of a flooring system, such as the flooring system disclosed in U.S.
Patent No. 4,592,184. The shear wall panel 10 may also extend upwards into an upper floor, such that the upper structural member 14 may also be embedded in a floor slab 36 of an upper flooring system. Many such shear wall panels are embedded in the floor slabs of a building to form the entire building structure.
[019] By placing the floor slabs 36 in intimate contact with the structural members 14, any horizontal forces exerted on the floor slabs 36 will be transferred to the shear wall 10 through the structural members 14 and/or from one floor slab to a neighboring floor slab. The deformed structural members 14 enable the floor slabs 36 to more effectively act as diaphragms in transferring energy to the shear wall 10 or to a neighboring floor slab 36.
10201 While this invention has been described in conjunction with the exemplary embodiments outlined above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the exemplary embodiments of the invention, as set forth above, are intended to be illustrative, not limiting. Various changes may be made without departing from the spirit and scope of the invention.
[0081 These and other features of this invention are described in, or are apparent from, the following detailed description of various exemplary embodiments of this invention BRIEF DESCRIPTION OF THE DRAWINGS
[009] Various exemPlary embodiments of this invention will be described in detail, with reference to the following figures, wherein:
[010] FIG. 1 illustrates a shear wall according to an exemplary embodiment of the present invention;
[011] FIG. 2 illustrates a shear wall according to another exemplary embodiment of the prescnt invention;
[012] FIG. 3 is a cross-sectional view along the line A-A shown in FIG. 1; and [013] FIG. 4 is a perspective view showing the shear wall of FIG. 1 including a structural member imbedded in a floor slab.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[014] The various exemplary embodiments of the present invention are directed to a shear wall that imparts buildings with the ability to withstand forces caused by, for example, earthquakes. The shear wall includes multiple shear wall panels, each including, as a component, a structural member, that transfers horizontal forces exerted on floor slabs, in which the structural member is at least partially embedded, to the shear wall panel. It should be appreciated that the various concepts of the present invention are not necessarily limited to earthquake resistant structures, but are also applicable to structures that are designed to withstand forces generated by any other factor, such as, for example, explosions or high winds. It should also be appreciated that the present invention is not limited to the particular shear wall structures expressly illustrated herein and that other shear wall structures may be used.
[015] FIG. 1 shows a shear wall panel, generally designated by reference number 10, according to an exemplary embodiment of the present invention. The shear wall panel may be one of many such panels that make up one shear wall of a building. The shear wall panel 10 is composed of a generally rectangular shaped frame including two vertically disposed frame members 12 and two horizontally disposed structural members 14. An opening 16 is defined by the frame members 12 and structural members 14 within the shear wall panel 10. The frame members 12 and structural members 14 may be attached to each other by any suitable means, such as, for example, pin joints, welding, bolts or connector elements 18.
[016] The shear wall panel also includes shear transfer means which can take any useful form. FIG. 1 shows the shear transfer means as diagonal braces 20.
Another type of shear transfer means may include a shear panel or a suitable energy absorber such as shown in FIG. 2 and described in co-pending U.S. Patent Application Serial No.
10/941,159, incorporated herein by reference. Specifically, referring to FIG.
2, the energy absorber, generally designated by reference number 21, includes a ductile member 22 and four braces 24. The braces 24 support the ductile member 22 at substantially the center of the opening 16. The ductile member 22 is formed of a ductil_e material, such as, for example, steel or aluminum. One of the ends of the braces 24 are connected to the ductile member 22 by any suitable fastening elements, such as, for example, adjustable nuts 26. The opposite ends of the braces 24 are attached to i-espective corners of the connector elements 18 by, for example, pin joints, welding or bolts. The number of braces 24 is not limited to four and any number of braces 24 can be used in the various exemplary embodiments of the invention. In the present embodiment of the invention, the braces 24 are tension rods, but can also be any other suitably rigid structural supports for the ductile element 22. Further, the ductile member 22 need not be ring-shaped, as shown in FIG. 2, but could have other shapes as would be understood by workers skilled in the art.
10171 Structural members 14 can take any useful form, for example angles or I-beams. As best seen in FIG_ 3, which is a cross-sectional view along the line A-A in FIG.
l, the structural members 14 may each include two metal bars, generally designated by reference numbers 26, 28. Such structural members are disclosed in U.S. Patent No.
4,592,184, incorporated herein by reference. Each of the bars 26, 28 have an angle shape and include a vertical leg 30 and a horizontal leg 32. The horizontal leg 32 of the bar 26 extends in the opposite direction from that in which the horizontal leg 32 of the bar 28 extends. The height of the vertical legs 30 of the bars 26, 28 are preferably the same, although in other embodiments the heights may be different. The vertical legs 30 of the two bai=s 26, 28 are spaced apart by the width of the connector elements 18.
Concrete engaging means 34 such as, for example, protrusions or slots are preferably formed at spaced intervals along the length of the vertical legs 30. It should be appreciated that the bars 26, 28 ma_y have any other suitable shape.
[018) As best shown in FIG. 4, a shear wall panel 10 is incorporated into a building structure by forming the concrete floor slab 36 in intimate contact with shear wall panel 10. In this regard, concrete may be poured such that the structural member 14 is at least partially, but preferably completely, embedded in the floor slab 36. The floor slab 36 may form a component of a flooring system, such as the flooring system disclosed in U.S.
Patent No. 4,592,184. The shear wall panel 10 may also extend upwards into an upper floor, such that the upper structural member 14 may also be embedded in a floor slab 36 of an upper flooring system. Many such shear wall panels are embedded in the floor slabs of a building to form the entire building structure.
[019] By placing the floor slabs 36 in intimate contact with the structural members 14, any horizontal forces exerted on the floor slabs 36 will be transferred to the shear wall 10 through the structural members 14 and/or from one floor slab to a neighboring floor slab. The deformed structural members 14 enable the floor slabs 36 to more effectively act as diaphragms in transferring energy to the shear wall 10 or to a neighboring floor slab 36.
10201 While this invention has been described in conjunction with the exemplary embodiments outlined above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the exemplary embodiments of the invention, as set forth above, are intended to be illustrative, not limiting. Various changes may be made without departing from the spirit and scope of the invention.
Claims (11)
1. A composite energy absorbing structure comprising:
a shear wall panel having at least one horizontally-disposed structural member partially embedded in a floor slab such that horizontal forces exerted on the floor slab are transferred to the shear wall panel through the structural member.
a shear wall panel having at least one horizontally-disposed structural member partially embedded in a floor slab such that horizontal forces exerted on the floor slab are transferred to the shear wall panel through the structural member.
2. The composite energy absorbing structure of claim 1, wherein the structural member comprises two or more bars each having an angle shape in cross section and each having a vertical leg and a horizontal leg.
3. The composite energy absorbing structure of claim 2, wherein the structural member includes a concrete engaging element formed in the structural member to enhance the connection between the floor slab and the shear wall panel.
4. The composite energy absorbing structure of claim 2, wherein the two or more bars are made of metal.
5. The composite energy absorbing structure of claim 1, wherein the shear wall further comprises:
a frame having an opening; and an energy absorber disposed in the opening.
a frame having an opening; and an energy absorber disposed in the opening.
6. The composite energy absorbing structure of claim 5, wherein the energy absorber comprises:
one or more ductile members; and two or more bracing members that support the one or more ductile members within the opening, wherein, when a force is applied to the energy absorber, the one or more ductile members deform to absorb energy.
one or more ductile members; and two or more bracing members that support the one or more ductile members within the opening, wherein, when a force is applied to the energy absorber, the one or more ductile members deform to absorb energy.
7. The composite energy absorbing structure of claim 5, wherein the frame further comprises:
at least one vertically-disposed frame member; and connector elements that connect the at least one frame member to the at least one structural member.
at least one vertically-disposed frame member; and connector elements that connect the at least one frame member to the at least one structural member.
8. A method of forming a composite structure in a building including one or more floor slabs, comprising:
forming a shear wall panel having a structural member; and at least partially embedding the structural member in a floor slab, such that horizontal forces exerted on the floor slab are transferred to the shear wall panel through the structural member.
forming a shear wall panel having a structural member; and at least partially embedding the structural member in a floor slab, such that horizontal forces exerted on the floor slab are transferred to the shear wall panel through the structural member.
9. The method of claim 8, wherein the shear wall panel has at least two structural members and the method further includes the step of embedding each of the structural members in a floor slab.
10. The method of claim 8, wherein the step of forming a shear wall panel comprises:
connecting a vertically-disposed frame member to the structural member to form a frame having an opening; and disposing an energy absorber in the opening.
connecting a vertically-disposed frame member to the structural member to form a frame having an opening; and disposing an energy absorber in the opening.
11. The method of claim 10, wherein the step of disposing an energy absorber in the opening comprises:
connecting respective first ends of two or more bracing members to a ductile member;
disposing the ductile member within the opening; and connecting respective second ends of the two or more bracing members to the frame.
connecting respective first ends of two or more bracing members to a ductile member;
disposing the ductile member within the opening; and connecting respective second ends of the two or more bracing members to the frame.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/494,592 US20080022610A1 (en) | 2006-07-26 | 2006-07-26 | Composite energy absorbing structure |
| US11/494,592 | 2006-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2592710A1 true CA2592710A1 (en) | 2008-01-26 |
Family
ID=38626922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002592710A Abandoned CA2592710A1 (en) | 2006-07-26 | 2007-07-20 | Composite energy absorbing structure |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20080022610A1 (en) |
| EP (1) | EP1882797A2 (en) |
| JP (1) | JP2008045393A (en) |
| CA (1) | CA2592710A1 (en) |
| MX (1) | MX2007008487A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425249A (en) * | 2011-08-22 | 2012-04-25 | 中国建筑设计研究院 | Cave mouth structure of steel-plate shear wall |
| CN107130708A (en) * | 2017-06-28 | 2017-09-05 | 华南理工大学 | A kind of overlap welding stirrup and method for improving ductility of sheer wall |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8099914B2 (en) * | 2006-10-30 | 2012-01-24 | The University Of Utah Research Foundation | Perforated plate seismic damper |
| US8037647B2 (en) * | 2006-10-30 | 2011-10-18 | University Of Utah Research Foundation | Perforated plate seismic damper |
| US8397444B2 (en) * | 2006-10-30 | 2013-03-19 | University Of Utah Research Foundation | Perforated plate seismic damper |
| CN101748828B (en) * | 2009-12-18 | 2011-08-10 | 北京工业大学 | Concrete filled steel tube laminated column frame inbuilt steel plate and steel truss interconnected space shear wall |
| CN101881056B (en) * | 2010-06-11 | 2011-12-07 | 北京工业大学 | Internal division type laminated column frame-bilayer steel plate concrete combined shear wall and manufacturing method thereof |
| US20130145702A1 (en) * | 2011-12-08 | 2013-06-13 | Yoshikazu Oba | Earthquake-Resistant Structure and Earthquake-Resistant Construction Method |
| US9145679B2 (en) | 2012-06-14 | 2015-09-29 | Xtreme Manufacturing, Llc | Form assembly for concrete slabs and methods of assembling same |
| US9316012B2 (en) * | 2013-04-26 | 2016-04-19 | W. Charles Perry | Systems and methods for retrofitting a building for increased earthquake resistance |
| CN103912072B (en) * | 2013-12-26 | 2016-11-09 | 北京工业大学 | A kind of built-in ladder lattice reinforcing bar that intersects fills wall and way |
| EP3012379A1 (en) * | 2014-10-22 | 2016-04-27 | STAP-Reparação, Consolidação e Modificação de Estruturas, S.A. | Dissipator panels and respective building system |
| GB201502792D0 (en) * | 2015-02-19 | 2015-04-08 | Pare Andre | Storage rack systeme and method |
| CN110320235B (en) * | 2019-07-29 | 2024-01-16 | 东南大学 | Single-sided fire test device and method for double-steel-plate-concrete combined shear wall |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1706496A (en) * | 1927-06-30 | 1929-03-26 | Pieri Pompeo | Earthquake and tornado proof building |
| US4441289A (en) * | 1980-05-07 | 1984-04-10 | Takenaka Komuten Co., Ltd. | Earthquake-resistant reinforcement structure for an existing building with compression braces or tension braces |
| US4409765A (en) * | 1980-06-24 | 1983-10-18 | Pall Avtar S | Earth-quake proof building construction |
| US4454695A (en) * | 1982-01-25 | 1984-06-19 | Person Joel I | Composite floor system |
| US4432178A (en) * | 1982-06-01 | 1984-02-21 | Steel Research Incorporated | Composite steel and concrete floor construction |
| US4592184A (en) * | 1984-07-16 | 1986-06-03 | Joel I. Person | Composite floor system |
| US4715155A (en) * | 1986-12-29 | 1987-12-29 | Holtz Neal E | Keyable composite joist |
| US5509243A (en) * | 1994-01-21 | 1996-04-23 | Bettigole; Neal H. | Exodermic deck system |
| US5630298A (en) * | 1995-09-05 | 1997-05-20 | National Science Council | Shear link energy absorber |
| US5934028A (en) * | 1996-08-08 | 1999-08-10 | Tayco Developments, Inc. | Toggle linkage seismic isolation structure |
| US5870863A (en) * | 1996-08-08 | 1999-02-16 | Tayco Developments, Inc. | Toggle linkage seismic isolation structure |
| FR2804709B1 (en) * | 2000-02-09 | 2002-04-19 | Campenon Bernard Sge | DEVICE FOR LIMITING THE RELATIVE MOVEMENT OF TWO ELEMENTS OF A CIVIL ENGINEERING STRUCTURE AND STRUCTURE COMPRISING SUCH A DEVICE |
| WO2002022994A1 (en) * | 2000-09-12 | 2002-03-21 | Tube Investments Of India Ltd. | A sleeved bracing useful in the construction of earthquake resistant structures |
| US20060150538A1 (en) * | 2004-12-27 | 2006-07-13 | Thomas Gareth R | Load-limiting device |
-
2006
- 2006-07-26 US US11/494,592 patent/US20080022610A1/en not_active Abandoned
-
2007
- 2007-07-12 MX MX2007008487A patent/MX2007008487A/en not_active Application Discontinuation
- 2007-07-20 CA CA002592710A patent/CA2592710A1/en not_active Abandoned
- 2007-07-24 EP EP07252930A patent/EP1882797A2/en not_active Withdrawn
- 2007-07-26 JP JP2007195064A patent/JP2008045393A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425249A (en) * | 2011-08-22 | 2012-04-25 | 中国建筑设计研究院 | Cave mouth structure of steel-plate shear wall |
| CN107130708A (en) * | 2017-06-28 | 2017-09-05 | 华南理工大学 | A kind of overlap welding stirrup and method for improving ductility of sheer wall |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1882797A2 (en) | 2008-01-30 |
| MX2007008487A (en) | 2009-01-07 |
| US20080022610A1 (en) | 2008-01-31 |
| JP2008045393A (en) | 2008-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20110720 |