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

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

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

Earthquakes Sumatra Earthquake and Tsunami of 2004 Kobe 1995 Northridge 1994

Earthquake Engineering Testing Large scale Numerical Hybrid pseudo-dynamic fast/real time Distributed hybrid testing

Large Scale Testing

Hybrid Testing

NEES NEES Partnership with National and International Initiatives

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

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.

Distributed Hybrid Test Architecture

Physical Model Node Architecture

Structure of a 5-floor Building Set Up for Hybrid Testing

Data Simulation of Physical Component Nonlinear Viscous Damper

Hybrid Testing Architecture Developed

Response from 5 th Floor to El- Centro NS Earthquake Storey drift is directly related to damage

Future Work Distributed Hybrid Testing Architecture

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

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.