Transcript Multi-Site Soil-Structure-Foundation Interaction Test (MISST) PI: Bill Spencer, Illinois Co-PIs: Amr Elnashai, Dan Kuchma, Illinois Jim Ricles, Richard Sause, Lehigh Tarek Abdoun, Ricardo Dobry, RPI Researcher/Personnel:

Multi-Site Soil-Structure-Foundation
Interaction Test (MISST)
PI: Bill Spencer, Illinois
Co-PIs: Amr Elnashai, Dan Kuchma, Illinois
Jim Ricles, Richard Sause, Lehigh
Tarek Abdoun, Ricardo Dobry, RPI
Researcher/Personnel: Sung Jig Kim, Curtis Holub, Naru Nakata,
Hassan Radwan, Tommy Marullo, Sogata Roy
Overview
 Pre-NEES R MISST; funding $30k per site, $90k total
 Project is a demo that has the objective:
To provide a realistic test bed application with which to
verify and extend all components of NEESgrid as well as
all components of the sites taking part in the distributed
simulation
Basis
Aspect of the Simulation




Communication between modules conducted through NTCP
Advanced analytical geotechnical modeling under dynamic loading
Advanced analytical structural modeling under dynamic loading
Advanced structural testing using multi-degrees-of-freedom testing facilities
UI-SIMCOR
Di
sp
.
.
isp
Tested Structure
D
Fo
rce
Disp.
Structural Module
(Zeus-NL)
Force
rce
o
F
Soil & Foundation
Module
(OpenSees)
Experiment
UI-SIMCOR Design Concept

Hybrid simulation: Integration of
analysis and experiments

UI-SIMCOR
Interoperability of modules: Number
of experimental sites, analytical
modules, and their role in the PSD
test are not restricted.

NEESgrid compatibility: Data
communication through NEES Tele-
Operations Control Protocol (NTCP)
MUST-SIM Facility, UIUC
UI-SIMCOR Design Concept

Hybrid simulation: Integration of
analysis and experiments

UI-SIMCOR
Interoperability of modules: Number
of experimental sites, analytical
modules, and their role in the PSD
test are not restricted.

NEESgrid compatibility: Data
communication through NEES Tele-
Operations Control Protocol (NTCP)
FEDEASLab
User defined Matlab
functions via API
Experiment
Lehigh
UIUC
FEDEAS Lab
UI-SIMCOR Design Concept
Updated protocols can be
UI-SIMCOR
readily integrated into
framework if API is maintained

NEESgrid compatibility: Data
communication through NEES Tele-
Operations Control Protocol (NTCP)
http://mae.cee.uiuc.edu/
Courtesy of NEESit
Objectives
Three Site Five Component Distributed Hybrid Bridge System



Connect three sites on line and run a structural-geotehcnical
system that demonstrates the potential of NEES to investigate
systems that could not be studied before
Harden simulation coordination software UI-SIMCOR and refine
its capabilities
Secondary: Demonstrate that complex shear failure modes
observed in the field (in this case, on the C-D 36, part of the I-10
Santa Monica Freeway in LA damaged by the 17 January 1994
Northirdge earthquake) can be duplicated in the NEES hybrid
simulation environment
MISST Test Structure
 The MISST structure is based on the Collector-Distributor
36 of the I-10 Santa Monica Freeway
– Damaged during the 17 January 1994 Northridge Earthquake
 Idealization of the original structure:
– To utilize current NEES experimental facilities and for simplification
– Large-scale NEES facilities of both UIUC and Lehigh University
– Geotechnical modeling at RPI
2288.8 kN
27.215 m
2834.6 kN
2515.6 kN
23.700 m
32.260 m
30.795 m
5
1
Bv
ice
Bv
124.8 kN/(m/sec2)
3
6.085 m
6.575 m
6
4
6.085 m
141.3 kN/(m/sec2)
7
en
NV
en
ice
Piers
SV
La Cienega
Bvld.
ld
ld.
2
GM Direction
233.6 kN/(m/sec2)
256.7 kN/(m/sec2)
289.2 kN/(m/sec2)
Configuration of MISST
Simulation
Approach System
Multi-Site Simulation
NEESgrid
Zeus-NL
UI-SIMCOR
UIUC
RPI
OpenSees
Lehigh
Experimental Setup
UIUC
Lehigh
Input Motions and Test Sequence
Northridge Earthquake Records
 Santa Monica City Hall Grounds – PGA=0.37g
– Small Amplitude Test: 998 steps (4.99 sec)
– Large Amplitude Test: 2354 steps (11.42 sec)
 Newhall Fire – PGA=0.583g
– Final (failure) Test: 1210 steps (6.05 sec)
EQ: Northridge, Station: santa, Component: Hor
0.4
0.6
0.3
0.4
Acceleration (g)
Acceleration (g)
0.2
0.1
0
-0.1
-0.2
0
0
2
4
6
8
10
12
-0.2
-0.4
-0.3
-0.4
0.2
PGA: 0.370 (g)
0
2
4
6
8
10
Time (sec)
12
14
16
Santa Monica Station
18
20
-0.6
PGA: 0.583g
Time (sec)
Newhall Fire Station
14
Final Test Results
 Comparison with analytical prediction
2.5
Prediction
Experiment
2
Lehigh
Lateral Displ (in)
1.5
1
0.5
0
UIUC
-0.5
-1
0
200
400
600
800
1000
1200
1400
Step
 Comparison between UIUC and Lehigh piers
Significant Shear Crack
Failure
Second Failure
UIUC
Lehigh
UIUC
Lehigh
UIUC
Step
727
948
941
954
1208
Displ. X (in)
1.222
1.942
1.605
2.142
2.468
Force X (kips)
111.47
124.48
124.19
95.24
98.83
Lateral Force - UIUC
Force X (Kips)
Force X (Kips)
Load-sharing between UIUC and Lehigh During Testing
140
120
100
80
60
40
20
0
-20 0
-40
-60
-80
-100
-120
-140
140
120
100
80
60
40
20
0
-20 0
-40
-60
-80
-100
-120
-140
UIUC
200
400
600
800
1000
1200
Step
Lehigh
200
400
600
Step
800
1000
1200
Synchronized Still Image Cameras
High Resolution Video
Failure Modes
Illinois and Lehigh
UIUC
Lehigh
Conclusions
Three Site Distributed Hybrid Bridge System



The multi-site test of three sites, UIUC, Lehigh and RPI, for a
five-component hybrid (testing-analysis) system was
conducted successfully using UI-SimCor as a simulation
coordinator.
The redistribution of forces between the two sites with bridge
piers as either of the two suffered partial failure shows that full
interaction was taking place between the distant sites, at each
time step.
The failure modes obtained are similar to those observed in the
Northridge earthquake, thus opening the door to formulating
design and retrofitting approaches to avoid such failures in the
future.