Post on 15-Dec-2015
transcript
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
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2 3 4
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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
Un
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Bid
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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….