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Fast Hybrid Test Platform for Fast Hybrid Test Platform for Seismic Performance Evaluation Seismic Performance Evaluation of Structural Systemsof Structural Systems

P.I.s: P. Benson Shing

Enrico Spacone

University of Colorado at Boulder

George E. Brown, Jr. Network for Earthquake Engineering Simulation

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Actuator

Computer Model Test Specimen

Actuator

ShearWall

Actuator

Ground Shaking

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.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.

Impact

Provide efficient testing capability for evaluation of large-scale structural systems.

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Major EquipmentMajor 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 250-

gpm servo-valve. Two 110-kip, 5-in. stroke actuators with

180-gpm servo-valves.

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Ethernet

EthernetEthernet

Ethernet

PC-OpenSees-Integration Routine

Digital Control System

VME Bus

DSP

D/A

A/D

Measuring Devices

Actuators (3)

Digital Encoders Digital DisplacementTransducers (3)

Controller PC

NEESpop

Internet

Signal Conditioners

Valve Drivers

SCRAMNet

SCRAMNet

SCRAMNetPC’s for Video Cameras

Video Cameras (3)

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Information for SIInformation 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 SIQuestions 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?