Bearing brace apparatus

• US 7,174,680 B2
• Filed: 05/29/2002
• Issued: 02/13/2007
• Est. Priority Date: 05/29/2002
• Status: Expired due to Term

• Current Assignee: SME Steel Contractors, Inc. (SME Industries, Inc.)
• Original Assignee: SME Steel Contractors, Inc. (SME Industries, Inc.)
• Inventors: Smelser, James M.
• Primary Examiner(s): A; Phi Dieu Tran
• Application Number:
  US10/158,738
• Publication Number:
  US 20030221389A1
• Time in Patent Office: 1,721 Days
• Field of Search: 521/649, 521/677, 521/671, 521/673, 521/678, 527/214, 527/231, 527/241, 527/245, 527/363, 527/381
• US Class Current: 52/167.3
• CPC Class Codes: E04C 2003/026 Braces
• CPC Class Codes: E04C 3/02 Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; BracesE04C3/38 takes precedence; for structures characterised by movable, separable, or collapsible parts E04B1/343; braced purlins E04B7/024
• CPC Class Codes: E04H 9/0237 Structural braces with damping devices
• CPC Class Codes: E04H 9/028 Earthquake withstanding shelters
• CPC Class Codes: F16F 7/12 using plastic deformation of members F16F9/30 takes precedence; yieldable means for mounting bumpers on vehicles B60R19/26; yieldable or collapsible steering columns B62D1/192
• CPC Class Codes: Y10T 29/49618 Restoring existing member, e.g., reinforcing, repairing
• CPC Class Codes: Y10T 29/49623 Static structure, e.g., a building component
• CPC Class Codes: Y10T 29/49632 Metal reinforcement member for nonmetallic, e.g., concrete, structural element

Abstract

The present invention is directed to a brace apparatus having a core member configured to absorb energy generated by seismic or other forces by undergoing plastic deformation. A buckling restraining assembly is included for maintaining the structural integrity of the brace after the core member has undergone plastic deformation. The buckling restraining assembly includes one or more bearings is located proximal the core member. The bearings are adapted to minimize friction between the core member and the buckling restraining apparatus. An air gap is positioned between the core member and the one or more bearings of the buckling restraining apparatus are adapted to prevent bonding of the core member and buckling restraining assembly. Projections are included in the core member of the brace apparatus to minimize movement of the middle portion of the core member relative to the buckling restraining assembly.

Claims

1. A brace apparatus comprising:

a core member having a first end, a second end, and a middle portion;

a buckling restraining assembly surrounding at least the middle portion of the core member, the buckling restraining assembly comprising;

a metal support positioned external to the core member;

a rigid cementitious layer coupled to the metal support and surrounding the core member; and

at least two separate bearing members each of which is interposed between the rigid layer and the core member so that one side of the bearing member is in direct contact with the rigid layer, and an opposite side of the bearing member is not in direct contact with the core member such that an air gap is formed between the core member and the bearing members;

the core member is comprised of a single piece of metal.

2. The brace of claim 1, wherein the core member comprises a metal core support.

3. The brace apparatus of claim 1, wherein the first and second ends of the core member are adapted to provide a mechanism for coupling the brace apparatus to other structural members.

4. The brace apparatus of claim 1, wherein the metal support comprises a metal tube.

5. The brace apparatus of claim 4, wherein the metal tube surrounds at least the middle portion of the core member.

6. The brace apparatus of claim 1, wherein the cementitious layer is bonded to a portion of the core member.

7. The brace apparatus of claim 6, wherein the cementitious layer is bonded to projections included on a portion of the core member.

8. The brace apparatus of claim 1, further comprising one or more lateral supports adapted to provide additional support to one or both of the first end and second end of the core member.

9. A brace apparatus adapted to absorb kinetic energy comprising:

a steel core member having a first end, a second end, and a middle portion;

one or more lateral supports adapted to provide additional support to at least one of the first and the second end of the steel core member;

a buckling restraining assembly surrounding the middle portion of the steel core member, the buckling restraining assembly comprising;

a metal support positioned external to the core member;

a cementitious rigid layer coupled to the metal support and circumscribing the core member; and

a plurality of bearing members each of which is interposed between the rigid layer and the steel core member so that each bearing member has one side that is in direct contact with the rigid layer and an opposite side that is not in direct contact with the steel core member such that an air gap is formed between the bearing members and the core member.

10. The brace apparatus of claim 9, wherein the rigid layer has less elasticity than the steel core member.

11. The brace apparatus of claim 9, wherein the one or more lateral supports comprise a plurality of lateral supports adapted to provide additional support to the first and second end of the steel core member.

12. The brace apparatus of claim 11, wherein the plurality of lateral supports are adapted to provide an attachment mechanism for coupling the brace apparatus to other structural members.

13. The brace apparatus of claim 11, wherein portions of the plurality of lateral supports are surrounded by the buckling restraining assembly.

14. The brace apparatus of claim 13, wherein the portion of each of the plurality of lateral supports surrounded by the buckling restraining assembly corresponds to one of the plurality of bearing members.

15. The brace apparatus of claim 14, further comprising one or more reinforcement assemblies adapted to contain the portions of the plurality of lateral supports corresponding with buckling restraining assembly, portions of the plurality of bearing members, and the portion of the steel core member corresponding with the portion of the plurality of lateral supports corresponding with buckling restraining assembly.

16. The brace apparatus of claim 15, wherein the one or more reinforcement assemblies are positioned between the plurality of bearing members and the rigid layer at the portion of the buckling restraining assembly corresponding with the portions of the plurality of lateral supports corresponding with the buckling restraining assembly.

17. The brace apparatus of claim 16, wherein the one or more reinforcement assemblies extend beyond the plurality of lateral supports in the direction of the middle portion of the steel core member such that the portions of the one or more reinforcement assemblies extending beyond the plurality of lateral supports form a void adapted to permit end portions of the plurality of lateral supports nearest the steel core member middle portion to move in the direction of the steel core member middle portion when the steel core member is compressed.

18. A brace apparatus adapted to absorb energy by providing plastic deformation while being resistant to buckling, the brace apparatus comprising:

a core member having a first end, a second end, and a middle portion;

one or more lateral supports adapted to provide additional support to the core member;

a buckling restraining assembly circumscribing the middle portion of the core member comprising;

a support tube surrounding a portion of the core member;

a rigid cementitious layer internal to the support tube; and

a plurality of bearing members interposed between the rigid layer and the core member such that one side of each bearing member is in direct contact with the rigid layer, and an opposite side is spaced apart from the core member so that it is not in direct contact with the core member such that an air gap is formed between the core member and the bearing members.

19. The brace apparatus of claim 18, wherein the air gap is adapted to prevent bonding of the core member and the buckling restraining assembly.

20. The brace apparatus of claim 18, wherein the lateral supports are coupled to the core member.

21. The brace apparatus of claim 18, wherein the lateral supports provide lateral support for at least most of the length of the core member.

22. The brace apparatus of claim 18, further comprising one or more reinforcement assemblies adapted to contain the plurality of bearing members, a portion of the lateral supports, and a portion of the core member.

23. The brace apparatus of claim 22, wherein the plurality of bearing members are positioned adjacent the core member and the lateral supports.

24. The brace apparatus of claim 23, wherein the one or more reinforcement assemblies comprise first and second reinforcement assemblies, wherein the first reinforcement assembly corresponds with the plurality of bearing members between a middle portion of the brace apparatus and a first end of the brace apparatus, and wherein the second reinforcement assembly corresponds with the plurality of bearing members between the middle portion of the brace apparatus and a second end of the brace apparatus.

25. The brace apparatus of claim 22, wherein the one or more reinforcement assemblies are positioned between the plurality of bearing members and the rigid layer.

26. In an improved brace apparatus, adapted to absorb energy by providing plastic deformation of a core member during seismic activity so as to be resistant to buckling, the brace apparatus having a buckling restraining assembly comprising a concrete filled tube circumscribing at least a middle portion of the core member, the improvement comprising:

bearing members interposed between the core member and the concrete filling of said tube, each said bearing members comprising a first surface in direct contact with the concrete filling, and a second surface that is opposite to the first surface and that is not in direct contact with the core member such that an air gap is formed between the core member and the;

the core member is comprised of a single piece of metal bearing members.

27. A brace apparatus comprising:

a core member having a first end, a second end, and a middle portion;

a buckling restraining assembly circumscribing the middle portion of the core member, the buckling restraining assembly comprising;

a metal support positioned external to the core member;

a cementitious rigid layer coupled to the metal support and circumscribing the core member; and

a plurality of bearing members interposed between the rigid layer and the core member wherein a first bearing member is positioned adjacent to a core member first side and a second bearing member is positioned adjacent a core member second side, such that an air gap is positioned between the first bearing member and the core member first side and an air gap is positioned between the second bearing member and the core member second side, one side of each bearing member is in direct contact with the rigid layer.

28. The support brace of claim 27, wherein a third bearing member is positioned between the first bearing member and the rigid layer and a fourth bearing member is positioned between the second bearing and the rigid layer.

29. The support brace of claim 28, wherein the third bearing member and the fourth bearing member are coupled to the rigid layer.

30. The support brace of claim 28, wherein an air gap is positioned between the first bearing member and the third bearing member and an air gap is positioned between the second bearing member and the fourth bearing member.

31. The support brace of claim 30, wherein one or more spacers are positioned between the first bearing member and the third bearing member and one or more spacers are positioned between the second bearing member and the fourth bearing member.

32. The support brace of claim 31, wherein the spacers are adapted to maintain the air gaps between the first and third bearing member and the air gaps between the second bearing member and the fourth bearing member.

33. The support brace of claim 32, wherein the air gaps and spacers are adapted to allow for an increase in the thickness of the core member due to plastic deformation caused by compression of the core member.

34. The support brace of claim 32, wherein the spacers are comprised of rubberized foam.