Transcript Fast Hybrid Test Platform for Seismic Performance

George E. Brown, Jr. Network for Earthquake Engineering Simulation
Fast Hybrid Test Platform for
Seismic Performance Evaluation
of Structural Systems
P.I.s: P. Benson Shing
Enrico Spacone
University of Colorado at Boulder
9/28/01
Colorado-NEES
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Computer Model
Test Specimen
Actuator Actuator
Actuator
Shear
Wall
Ground Shaking
Approach
• Use of high-performance,
high-speed hydraulic actuators
and digital control system.
• Develop efficient and robust
computation and control
schemes.
• Develop advanced simulation
models.
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Objectives
• Develop a reaction-wall type testing system
to simulate earthquake response of structures
in real time.
• The system integrates model-based
simulation with physical testing using
substructuring techniques.
• The system can be operated via the Internet
to allow teleparticipation by remote users and
to control tests at other sites with high-rate
data exchange.
Impact
Provide efficient testing capability
for evaluation of large-scale
structural systems.
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Major Equipment
 3-channel digital controller and 48-channel
data-acquisition system with sampling rates
of 1 KHz.
 Computer for model-based simulation.
 One 220-kip, 6-in. stroke actuator with 250gpm servo-valve.
 Two 110-kip, 5-in. stroke actuators with 180gpm servo-valves.
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PC
-OpenSees
-Integration Routine
SCRAMNet
Digital Control System
VME Bus
Ethernet
Controller PC
SCRAMNet
DSP
D/A
A/D
Valve Drivers
Actuators (3)
Signal
Conditioners
Measuring Devices
Digital Encoders
Digital Displacement
Transducers (3)
Ethernet
NEESpop
SCRAMNet
Ethernet
Ethernet
PC’s for Video
Cameras
Video Cameras (3)
Internet
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Information for SI
 Use SCRAMNet to share memory among local PC’s and digital
control system for hybrid test simulation. SCRAMNet allows
almost instantaneous memory access (1 microsecond).
 Use SCRAMNET to share information among different test sites
for linked tests via NEESpop. Desired information exchange rate
is 1 KHz with 20 channels of data.
 Use Ethernet (100Base-TX) for non-time-critical information
sharing in the local area network.
 Allow remote users to run pretest analysis with a resident
program via the Internet.
 Allow remote users to set up test parameters and data channels
to monitor via the Internet.
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Questions for SI
 What is NEESpop?
 Can NEESpop fulfill the needs described in the previous slide?
 What do equipment suppliers and software developers need to
know to integrate software, PC’s, and digital control system with
the NEESpop?
 What type of interface software will be developed by SI for
teleparticipation?
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