corebrace brochure dec 2011

7/28/2019 CoreBrace Brochure Dec 2011

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Building codes recognize the improved seismicbehavior o Buckling Restrained Braced Frames(BRBFs), allowing UP TO A 25% DESIGN LOADREDUCTION, compared to other commonly usedlateral systems. Tis means:

FEWER rames

LESS structural weight

SMALLER oundations

CoreBrace BRBs are engineered to have essentiallythe same capacity in tension and compression,resulting in less overstrength built into the structure.Additionally, they can be used in single diagonalcongurations without design penalties. Tis means:

FEWER braces and connections

SMALLER rame columns and beams

SMALLER connections to the structure andoundations

CoreBrace Buckling Restrained Braces

COREBRACE BRBF TYPICAL CBF

CHEVRON CHEVRON

30'-0"

LVL 2

LVL 1

W40x503

LVL 3

W14x500

LVL 4

W27x281ROOF

W40x503

W14x257

W40x503

HSS

16x0

.625

15'-0"

15'-0"

15

'-0"

15'-0"

W14x605

W36x395

W27x368

LVL 5

LVL 6

15'-0"

15'-0"

W1

4x370

W14x145

W14x74

HSS

14x0

.625

HSS

14x0

.375

HSS

9.625x

0.375

HSS

16x0

.438

HSS

16x0

.625

GL G

30'-0"

LVL 2

LVL 1

LVL 3

W14x283

LVL 4

W16x77ROOF

W14x145

13.25in

15'-0"

15'-0"

15

'-0"

15'-0"

W14x342

LVL 5

LVL 6

15'-0"

15'-0"

W1

4x211

W14x132

W14x68

11.25

in

7.0in

4.0in

9.5in

12.5

in

W16x77

W16x77

W16x77

W16x77

W16x77

GL GL

BRB

BRB

BRB

BRB

BRB

BRB

BRBF vs. Typical CBF Frame Comparison

University of Utah Marriott Library Renovation, Salt Lake City, UT

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.160.18

0 10 20 30 40 50 60 70 80 90 100

BASESHEARCOEFFICIENT

BUILDING HEIGHT (FT)

LATERAL SYSTEM SEISMIC LOAD COMPARISON

Buckling Restrained Braced Frame (BRBF)

Special Concentrically Braced Frame (SCBF)

CALIFORNIA SITE

BRBF

SCBF

0.00

0.20

0.40

0.60

0.80

1.00

1.20

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5SPECTRALRESPONSEACCSa(g)

PERIOD T (SEC)

DESIGN RESPONSE SPECTRUM4 STORY BUILDING CALIFORNIA SITE


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CoreBrace BRBs are manuactured in ourAISC CERTIFIED SHOP, located adjacent toour design oces in West Jordan, Utah. Tismeans:

Fabrication constantly monitored to meetthe HIGHEST QUALITY STANDARDS

Maximum SCHEDULE CONTROL

CoreBrace BRBs are designed to be extremelyQUICK AND EASYTO INSTALL. Our team works in close coordination with the steelabricator in the detailing phase o the project to minimize conicts inthe eld. Tis means:

FASTER ERECTION o buildings

NO ADDITIONAL LEAD TIME beyond that required

by the structural steel abricatorCoreBrace is committed to MEET OR EXCEED our clientsDELIVERY EXPECTATIONS each and every time

BRBs are a codied building lateral load resisting system. Tis means:

NO LICENSING FEES are required to use CoreBrace BRBs.

CoreBracessuperior seismic performance

means lower risk with cost savings

Community Financial Services Bank, Benton, KY


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CoreBrace Buckling Restrained Braces arestructural elements composed o a steel coreencased in a grout-lled steel tube. Te grout/casing assembly connes the core, increasingits critical load to a point that the axial capacityin compression is only limited by the yieldstress o the steel. Te concept allows the coreto resist the design axial orces utilizing the

FULL STEEL STRENGTH while the casingresists exural buckling. Proprietary InteraceMaterial is used to separate the two resistingsystems, with MINIMIZED FRICTION. Teresult is a high perormance brace that DOESNOT BUCKLE.

In this mechanism the steel core yields in tension andcompression, dissipating energy with a SUSTAINEDSYMMETRIC HYSTERETIC BEHAVIOUR. As a consequence,the braces act as structural uses, concentrating all the activityin the plastic range while gussets, beams and columns remainelastic during a seismic event. CoreBrace BRBs use a STABLEEND PROJECTION rom the casing, which eliminates the needor CJP welds. Tis provides improved redundancy in the loadpath and allows or post-event visual inspection.

Engineering Overview

-2000

-1000

0

1000

2000

-6.0 -4.0 -2.0 0.0 2.0 4.0 6.0

Brace Deformation (in)

ResultantForc

e(kips)

AISC Required Protocol

High Amplitude Protocol

BRB Hysteresis Curve (ASC=27 in2)

0

0

Brace Deformation ()

SCBF Brace Buckling

BRB No BucklingResultantForce

(P)

BRBF

SCBF

BRBF vs. SCBF

CoreBrace BRB

COMPONENT DESCRIPTION

MATERIAL

SPECIFICATIONS

1 Core Plate Flat () or cruciormshape (+) ASTM A36

2 Steel Casing Square, rectangularor roundASTM A500 Gr BASTM A-53

3 Grout Casing infll Per CoreBracespecifcation

4 Connectionto GussetBolted (shown),welded or pinned

ASTM A572 Gr 50


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Additionally, to assist with the generation oproject documents, CoreBrace will provideCONNECTION DETAILS and REVIT FAMILIES.

Independent SUBASSEMBLAGE TEST results show that CoreBrace BRBs exceed the requirements o AISC 341,providing consistent hysteretic behavior during multiple load cycles, at deormations up to 22 times the yield elongation.

Testing oCoreBrace BoltedLug Braces was perormed at theUniversity o Utah, the Universityo Caliornia, San Diego and theNational Center or Research onEarthquake Engineering (NCREE)acilities in Taiwan.

CoreBrace has successully testeda brace spliced in the center andinstalled in two pieces, ideal orretroft applications.

Tested braces:Area: 4.0 in2 to 27.0 in2Length: up to 31-0

CoreBrace Spliced PlateBraces have been tested atthe University o Utah and theUniversity o Caliornia, San Diego.

Tested braces:Area: 1.5 in2 to 27.0 in2Length: 15-0 to 19-0

CoreBrace Pinned Braceshave been tested at the Universityo Caliornia, San Diego and theNational Center or research onEarthquake Engineering (NCREE)acilities in Taiwan.

Tested braces:Area: 4.0 in2 to 27.0 in2Length: 12-0 to 21-2

Testing oCoreBrace WeldedBraces has been perormed at theUniversity o Caliornia, San Diego.

Tested braces:Area: 2.0 in2 to 18.0 in2Length: 21-6

CoreBrace provides engineers with REAL TIME DESIGNASSISTANCE during all stages o the project. Our proessionalsreport brace stiness values to be used in the analysis o anystructure and design the gusset plates that connect the BRBs to therame columns and beams. Useul tools such as tables with reerence

values and MODELING GUIDES or structural analysis sofware(RAM STRUCTURALSYSTEM, RISA,

ETABS, SAP andPERFORM 3D) areavailable to helpengineers accuratelycapture the BRBsbehavior in theirstructural models withthe desired level orenement.

Force

(kips)

Displacement (in)

Perform 3D Trilinear

-500

-400

-300

-200

-100

0

100

200

300

400

500

-5 -4 -3 -2 -1 0 1 2 3 4


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CoreBrace Buckling Restrained Braces can meetthe most demanding project constraints includingextreme brace geometry layouts, architecturalaesthetic considerations, erection and constructionissues, and structural design requirements. Teollowing example options are available to buildbraces that will suit any specic need:

Square, rectangular, or round casing

Bolted, pinned, or welded connections

Shop applied fnishes

Te CoreBrace team is ready to assist in the constructionphase o the project when needed. We pride ourselves onproviding PROMPT RESPONSE to any job site inquiriesand RFIs and on making every eort to help contractorsmeet schedule.

Flexibility and Assistance

Pin Connection/Square Casing/Galvanized

Welded Connection/Square Casing/Full Height Gusset

Welded Connection/Square Casing/Shop Applied Epoxy Finish

Bolted Lug/Round Casing

Bolted Lug/Square CasingAES

Splice Plate Connection/Square Casing

SPLICE PLATE,(8) TOTAL

nB

olts

W1

s/2

Dwb Lwb

Dwc Lwc

Db

ats

SPLICE PLATE

s/2

S

WL

Dwb Lwb

Dwc Lwc

Db

BOLTED LUG

dp

WL

drg

Dwb Lwb

Dwc Lwc

PIN

SLOT GUSSETTO RECEIVECORE PLATEEXTENSION

Dwsg

TYPDwg

W

s

Dwc Lwc

Dwb Lw

WELDED


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LAPD HeadquartersLos Angeles, CA Bolted Lug Braces

MSB Career CenterWasilla, AK Bolted Lug Braces

The Questar Corporation New OceBuilding

Salt Lake City, UT Welded Braces

Center Court Building Retroft

Eugene, OR Welded Braces

Intermountain Medical CenterMurray, UT Bolted Lug Braces

The David and Lucile Packard FoundationLos Altos, CAWelded Brace as Fuse in Rocking Frame

BC Place StadiumVancouver, British Columbia, Canada

Bolted Lug Braces

Kaiser Vallejo Medical CenterVallejo, CA Spliced Plate Braces

UCSF Cardiovascular BuildingSan Francisco, CA Bolted Lug Braces

University o Utah Marriott LibraryRenovation

Salt Lake City, UT Bolted Lug Braces

World Market Center III

Las Vegas, NV Bolted Lug Braces


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COREBRACE, LLC

5789 West Wells Park Road West Jordan, UT 84081

Phone (801) 280-0701 Fax (801) 280-3231

www.corebrace.com

Contact us for cost estimatesand engineering support.

corebrace brochure dec 2011

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