Current NEESR Projects and Potential Applications at MUST-SIM

Jerry Hajjar

University of Illinois

Possible Application

NEESR-SG 2005

Pre-NEESR Multi-Site Soil-Structure-Foundation

Interaction Test (MISST), Bill F. Spencer, Amr S. Elnashai, Dan Kuchma (University of

Illinois); Jim Ricles (LeHigh); Tarek Abdoun and Ricardo Dobry (RPI, change to full)

NEESR-SG: Seismic Behavior, Analysis and Design of Complex Wall

Systems, Laura Lowes and Dawn Lehman (University of Washington); Dan Kuchma

(University of Illinois) and Jian Zhang (University of California Los Angeles)

NEESR-SG: Seismic Simulation and Design of Bridge Columns under

Combined Actions and Implications On System Response, David Sanders

(University of Nevada – Reno), Abdeldjelil Belarbi (University of Missouri –Rolla), Amr Elnashai (University of Illinois), etc

NEESR-SG 2005

NEESR-SG: Innovative Applications of Damage Tolerant Fiber-Reinforced Cementitious Materials for New Earthquake Resistant Systems and Retrofit

of Existing Structure, James White (University of Michigan), Sarah L. Billington (Stanford

University), James LaFave (University of Illinois)

NEESR-SG: Controlled Rocking of Steel-Framed Buildings with

Replaceable Energy Dissipating Fuses, Greg Deierlein and Sarah Billington (Stanford

University), Jerry Hajjar (University of Illinois)

NEESR-GC: SEISMIC RISK MITIGATION FOR PORT SYSTEMS, Glenn Rix

and Reggie DesRoches (George Tech), Doug Foutch (University of Illinois), etc

Multi-Site Soil-Structure-Foundation Interaction Test (MISST)

At UIUC: Bill F. Spencer, Amr S. Elnashai, Dan Kuchma

At Lehigh: Jim Ricles

At RPI: Tarek Abdoun and Ricardo Dobry

Introduction

The MISST was intended to provide a realistic test bed application with which to verify – all components of the NEESgrid – all components of the sites taking part in the distributed

simulation

The behavior of a complex bridge structure including soil-structure interaction will be investigated

The collaborating partners of MISST – University of Illinois at Urbana-Champaign (UIUC)– Lehigh University (Lehigh)– Rensselaer Polytechnic Institute (RPI)

Test Structure

The MISST structure is based on the Collector-Distributor 36 of the I-10 Santa Monica Freeway – It was damaged during the 17 January 1994 Northridge Earthquake– Unusual pattern of failure

Idealization of the original structure– To utilize current NEES experimental facilities and for simplification– Large-scale NEES facilities of both UIUC and Lehigh University, – Advanced geotechnical modeling and possible centrifuge test at RPI

27.215 m 23.700 m 32.260 m 30.795 m

6.085 m6.575 m 6.085 m

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Multi-Site Simulation

The structure is subdivided into 5 static modules

MISST utilizes several aspects of simulation that will comprise many of the applications of the NEES experimental sites and NEESgrid by including:– Advanced analytical geotechnical modeling (or testing)– Advanced analytical structural modeling– Advanced structural testing using multi-degrees-of-freedom testing facilities

1

2 3 4

5

6 7

Deck, Pier 2, Soil 2

UIUCPier 1

LehighPier 3

RPISoil 1

Soil 3

Pretest with UIUC and Lehigh

Test Schedule

Large Scale Test

AprilApril MayMay

33 1010 1717 2424 11 88 1515 2222 2929

Small Scale Test

Test Setup

Small Amplitude Test

Large Amplitude Test

Damage to the Santa Monica Freeway

Collector-Distributor 36

UI-SIMCORUIUC

Lehigh

RPI

NCSA

RPI

Multi-Site Simulation System

NEESgridNEESgrid

Sub-Structuring Technique

Comparison Damage to the Santa Monica Freeway

Failure in the EarthquakeFailure in the Earthquake Failure in the LaboratoryFailure in the Laboratory

Preliminary Pier Test at UIUCPreliminary Pier Test at UIUC

MISST Experimental Setup

Multi-site pseudo-dynamic

test allows us to investigate

seismic behavior of large-

scale structural system with

soil-structure interaction

using NEESgrid

environment.

Multi-site simulation

framework has been

theoretically verified to be

effective.

NEESR-SG: Seismic Behavior, Analysis and Design of Complex Wall Systems

At UWash: Laura Lowes and Dawn Lehman

At UIUC: Dan Kuchma

At UCLA: Jian Zhang

Experimental Test Program

Moment Gradient

SSIBoundary

Conditions

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Planar (2) Flanged Coupled

Core-Wall System

LoadHistory

: x= 2 %, y= 2 %

: x= 0.6 %, y= 1.5 %

: x= 0.6 %, y= 2 %

: x= 2 %, y= 2 %

: x= 0.6 %, y= 1.5 %

: x= 0.6 %, y= 2 %

: x= 2 %, y= 2 %

: x= 0.6 %, y= 1.5 %

: x= 0.6 %, y= 2 %

Magnitude of Vertical Stress

Figure 3 Analysis of Coupled-Wall System

Planar Wall Tests

C-Shaped Wall Tests

Depiction of a test specimen in the UIUC NEES facility

PRETEST REQUIREMENTS 13 20 27 3 10 17 24 1 8 15 22 29 5 12 19 26

Task 1: Testing of Control System Using Rubber Wall Specimen1.1 Fabrication of Rubber Wall (RW) with 4 Connection Points1.2 Conduct Tests on RW with 2 sLBCBs1.3 Conduct Tests on RW with 2 small Ancillary Actuators (sAA)1.4 Conducts Test on RW with 2 sLBCBs and 2 AAs

Task 2: Testing of Control System on Small RC Wall2.1 Fabrication of 5 small Reinforced Concrete Wall (sRCW)2.2 Conduct Test on sRCW with one sLBCB2.3 Conduct Test on sRCW with 2 sLBCBs2.4 Conduct Test on sRCW with 2 sLBCBs and 2 sAAs

Task 3: Testing of Control System in Full Scale Facility3.1 Fabrication of Steel Structure for multi LBCB loading3.2 Connection of 2 LBCBs into test position*3.3 Connection of 2 Ancillary Actuators into position3.4 Conduct Tests on SS with 2 LBCBs3.5 Conduct Tests on SS with 2 LBCBs and 2 AAs

* Full displacement and mixed mode control calibration of 2 LBCBs required

March April May June

FABRICATION AND TESTING OF WALLS 13 20 27 3 10 17 24 1 8 15 22 29 5 12 19 26 3 10 17 24 31 7 14 21 28 4 11 18 25

Task 4: Fabrication of First Large Wall4.1 Complete Heat Treating of Bars4.2 Construction of Formwork for Footing4.3 Complete Gauging of Bars for Footing4.4 Fabrication of Cage for Casting of Footing4.5 Cast Footing and Remove Formwork4.6 Wall Formwork4.7 Fabrication of Cage for Wall with Internal Instrumentation4.8 Cast Wall and Remove Formwork4.9 Formwork for Wall Cap

4.10 Reinforcement for Wall Cap4.11 Cast Wall Cap and Remove Formwork4.12 Attach Surface Instrumentation4.13 Wall Ready to Move into Test Position

Task 5: Fabricate of 3 Remaining Planar Walls5.1 Fabricate Wall 25.2 Fabricate Wall 35.3 Fabricate Wall 4

Task 6: Testing Schedule for Planar Walls6.1 Planar Wall 16.2 Planar Wall 26.3 Planar Wall 36.4 Planar Wall 4

March April May June July August September

NEESR-SG-2005

Seismic Simulation and Design of Bridge Seismic Simulation and Design of Bridge Columns under Combined Actions, and Columns under Combined Actions, and

Implications on System ResponseImplications on System Response

University of Nevada, RenoUniversity of Illinois, Champaign-Urbana

University of Missouri, RollaUniversity of California, Los Angeles

Washington University, St. Louis

Causes of Combined Actions

Functional Constraints - curved or skewed bridges

Geometric Considerations - uneven spans or different column heights

Multi-directional Earthquake Motions -significant vertical motions input or near field fling impacts

Structural Constraints - stiff deck, movement joints, soil condition and foundations

Small Scale Testing Facility, UIUC

Shake Table Facility, UNR

UMR Shaking Table Program

PI - Belarbi

UIUC – Simulation Program

          PI - Elnashai

UNR Testing Program

PI and Project Coordinator - Sanders

International Cooperation

University of Mexico

E-Defense

Analysis, Education and Outreach

Analysis● System analysis at UCLA (Jian Zhang)● Distributed (hybrid & analysis) at UIUC (Elnashai)

Education and Outreach● Education site and web models at WU (Dyke)● Outreach visits and hosting by all

Outcome

Member Tests● Effect of design and detailing on failure of members under

multi-axial (axial, bending, shear, torsion) conditions● Recommended design guidance on member level

Bridge Simulations● Effect of multi-axial excitation on bridge response● Design recommendations on the system level

There are Currently No Slides from Projects 4, 5, and 6

There are slides from the Building Group project as shown in the next 3 slides

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Building Test

Computational componentExperimental component

Building Test

Pseudodynamic testing and analysis of steel frames exhibiting flexible connections

Full Scale Model

Education and Outreach

University of Washington Open House (April 2005): teleobservation and teleoperation

Discovery Engineering Program, University of Illinois (July 2005)

Engineering Open House (March 2005)

Visitors….