NEESWood: Full-Scale 3-D Testing, Numerical NEESWood: Full-Scale 3-D Testing, Numerical Modeling, and Other ProgressModeling, and Other Progress

“NEESWood: Development of a Performance-Based Seismic Design Philosophy for Mid-Rise Woodframe Construction”

www.engr.colostate.edu/NEESWood/

John van de Lindt

Andre Filiatrault

RachelDavidson

DavidRosowsky

MichaelSymans

Performance criteria resource document for innovative construction, Report NBSIR 77-1316 National Institute of Standards and Technology, Washington, DC.

PBD for woodframe construction has roots in HUD’s “Operation Breakthrough”

Woodframe PBD is in a position to fuel product innovation – the original intent of 1970’s work

The objective of the NEESWood project is the development of a new logical performance-based seismic design philosophy for mid-rise woodframe construction, thus enabling such construction to be an economic option in seismic regions in the U.S. and around the

world

17 industry sponsors…7 member practitioner advisory com.

Background & Objective

Project Components

• Full-scale 3-D testing – years 1 and 4– UB - Benchmark– E-Defense - Capstone

• Numerical model development/refinement - ongoing

• PBSD development – years 2 and 3• Inclusion of response modification

devices– Testing and analysis

• Societal risk/decision making/impact• Outreach and education

– REU’s – 2 NEESInc & 2 – CC (ECC)

• International collaboration – E-Defense

Testing

Benchmark TestsUniversity at Buffalo

Capstone TestsMiki City, JAPAN

Assembly Level TestsRPI CSU

Pre-fabricated wallswith dampers

•Evaluate seismic response of full-scale woodframe building•Evaluate effects of interior and exterior wall finish materials – incorporate in design ?•Evaluate effects of passive seismic protection systems•Generate landmark experimental data to be used by project participants and broader earthquake engineering community•2-story townhouse building with an integrated two-car garage•“Production house” in either the 80’s or 90’s, located in either Northern or Southern California•Engineered construction designed according to UBC-1988

Benchmark Tests

•During the test phases requiring drywall installation–30 students from Erie Community College (Construction Management Engineering Technology, Civil Engineering Technology, and Building Management/Building Trades Programs)

–Responsibilities will include:•Installation of GWB (drywall) on the interior of the structure for two test phases•Shifts are 4.5 hrs with a 30 minute overlap for continuity – 12 hour work day•Prepare project schedule using Microsoft Project including procurement of materials and supplies based on a given budget•On-site training and safety sessions

•Students include male and female students from U.S. and international backgrounds. Minority groups, non-traditional students, traditional students.•Thanks to Tom Albrechcinski Andrei Reinhorn at UB• Gregory Gillis and Shawn Hall at ECC

Erie Community College

Floor Plans

Elevations

Woodframe construction 101…

•OSB only with seismic mass equivalent to completed structure•OSB only with pre-fabricated damper walls•Drywall (GWB) on structural walls•Drywall added on partition walls•Stucco – finished structure

Five Test Phases

Completed

In-progressTesting on Monday!

Test Phase 1, Level 2, 53% Canoga Park Record, 1994 Northridge Earthquake

Garage Wall - Line 6, 1st floor - NWP1S17

-2

-1

0

1

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0 10 20 30 40

time (sec)

Inte

rsto

ry D

rift

(%

)

Global Base Shear - Y dir - NWP1S06

-40

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30

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-3 -2 -1 0 1 2 3

2nd Level Central Displacement (in)

Ba

se S

he

ar

(kip

s)

Seismic Mass

Chevron Bracing

Displ. & Veloc.Sensor

Seismic Damper

Accelerometer

Load Cell

Shaking Table Test of Wood Shear Wall with Seismic Damper

Pre-Fabricated Damper Walls within Wood Framing of NEESWood Test Structure

Damper LocationsTypical Installation of Pre-Fabricated

Damper Wall within Existing Wall Section

Analysis of NEESWood Benchmark Test Structure with Dampers

Pre-Fabricated Damper Wall

-4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5-6

-5

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Hysteretic Response of Wall Subjectedto 120% Canoga Park Bi-Axial Excitation

Interstory Drift (in)

Fo

rce

(kip

)

Wall Force + Damper Force

No Dampers

with Dampers

Hysteretic Response of Selected Shear Wall within Test Structure

Test structure report from Buffalo less than 24 hours ago

• Proposed payload project under review – inclusion of visco-elastic adhesive to reduce damage to drywall (Dinehart and Shenton III)

• Seismic Analysis software Package for Woodframe Structures– Based on CASHEW/SAWS platform– GUI to provide outreach to and

enable practitioners– Research tools such as IDA

included• Societal Risk / Decision Making• PBSD

– Displacement-based– Damage-based

Just beginning…

DisseminationProject Webpage Quarterly Project Newsletter

Practitioner Advisory Committee:Kelly Cobeen, Cobeen & AssociatesJ. Daniel Dolan, Washington State UniversityKevin Cheung, Western Wood Products AssociationSteven Pryor, Simpson Strong Tie CompanyBorjen Yeh, APA-The Engineered Wood AssociationPhilip Line, American Forest and paper AssociationChikahiro Minowa, NIED-Japan

Research Associates:Ioannis P. Christovasilis, UBHongyan Liu, CSUShiling Pei, CSUJayesh Shinde, RPIWeichang Pang, TAMUAssawin Wanitkorkul, UBDamon Reigles, RPIJames Foreman, CSUJames Lucas, RPICharles Ekiert, UBDavid Keller, UB

Thank you to the following companies for their material and in-kind donations to The NEESWood Project:

APA-The Engineered Wood AssociationB&L Wholesale SupplyBuffalo PlasteringErie Community CollegeGambale USADCI EngineersHartland Builders of New York, Inc.Georgia PacificMiTek Industries, Inc.National GypsumNGC Testing ServicesNiagara Truss & Pallet LLCNational Overhead Door, Inc.Stanley BostitchSimpson Strong-Tie Co.Ridg-U-RakTaylor Devices Inc.Thank you to the following NEES@UB

personnel for their technical assistance:Andrei ReinhornThomas AlbrechcinskiMark PitmanChristopher BuddenDuane KozlowskiRobert StaniszewskiScot WeinreberJason HanleyGoran Josipovic

This material is based upon work supported by the National Science Foundation under Grant No. CMS-0529903 (NEES Research) and CMS-0402490 (NEES Operations). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the investigators and do not necessarily reflect the views of the National Science Foundation.

Thank you!