Grid Based Distributed Hybrid Testing

1
Grid Based Distributed Hybrid Testing Mobin
Ojaghi, Javier Parra-Fuente, Kashif Saleem,
Anthony Blakeborough, Martin S.
Williams. Department of Engineering Science,
University of Oxford.
Paper 798
11.9.07
2
Theme

• Grid technology applied to earthquake engineering
  testing to facilitate distributed hybrid testing.
• UK-NEES (UK Network for Earthquake Engineering
  Testing)

3
Overview

• Earthquakes and earthquake engineering testing
• Hybrid testing
• Pseudo-dynamic and fast/real time hybrid
  
• testing
• Distributed hybrid testing
• NEES and UK-NEES
• Proposed architecture
• Grid architecture example
• Future work
• Related work

4
Earthquakes

• Sumatra
• Earthquake and
• Tsunami of 2004
• Kobe 1995
• Northridge 1994

5
Earthquake Engineering Testing

• Large scale
• Numerical
• Hybrid
• pseudo-dynamic
• fast/real time
• Distributed hybrid testing

6
Large Scale Testing
7
Hybrid Testing
8
NEES
NEES Partnership with National and International
Initiatives
9
UK-NEES

• Tele-observation
• Tele-participation
• Tele-operation
• Distributed hybrid testing
• On-line data access

10
UK-NEES Components

• NEES Equipment Test Specimen, actuators,
  sensors, hydraulic controls, etc.
• Data Acquisition System (DAQ) Acquires data from
  research Equipment.
• NEES Point of Presence (NEES POP) Provides a
  home for NEES grid services at the equipment
  site.
• Hybrid Testing Node Synchronizes and runs the
  geographically distributed hybrid tests.

11
Distributed Hybrid Test Architecture
12
Physical Model Node Architecture
13
Structure of a 5-floor Building Set Up for Hybrid
Testing

14
Data Simulation of Physical Component


Nonlinear Viscous Damper
15
Hybrid Testing Architecture Developed
16
Response from 5th Floor to El-Centro NS Earthquake

• Storey drift is directly related to damage

17
Future Work

• Distributed Hybrid Testing Architecture

18
Related Work

• Grid technology in related projects
• US-NEES
• NZ-NEES
• JST (Japanese Science and Technology)
• International Solid Earthquake Research Virtual
  Observatory (ISERVO)

19
Conclusions

• Grid architecture allows expensive physical
  equipment located in different sites to work
  together to develop bigger distributed
  simulations, much larger than could be carried
  out due to cost and space limitations in any one
  lab.
• UK-NEES is the first grid network to be created
  in the UK to enable distributed hybrid testing.
  The grid architecture shown enables connection of
  heterogeneous hardware platforms at different
  nodes and user friendly software will allow
  viewing and participation in testing offering a
  smooth running solution for collaborative
  distributed testing.