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Yurong Guo 1 , Yan Xiao 1,2

Development and Application of NetSLab for Hybird Simulation. Yurong Guo 1 , Yan Xiao 1,2. 1. College of Civil Engineering, Hunan University 2. Department of Civil Engineering, University of Southern California. International Mini-workshop on Hybrid Simulation HIT, May 18,2012. Outline.

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Yurong Guo 1 , Yan Xiao 1,2

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  1. Development and Application of NetSLab for Hybird Simulation Yurong Guo1, Yan Xiao1,2 1. College of Civil Engineering, Hunan University 2. Department of Civil Engineering, University of Southern California International Mini-workshop on Hybrid Simulation HIT, May 18,2012

  2. Outline • Introduction • Development of Networked Structural Laboratories (NetSLab ) • Hybrid Tests of Structures with NetSLab • Conclusions

  3. Entity Transfer Information Transfer

  4. 1. Introduction Network-based Earthquake Engineering

  5. Some Programs • NEES (Network for Earthquake Engineering Simulation, USA) • E-Defence,Online Hybrid Test System (Japan) • KOCED (Korea Construction Engineering Development Program) • European Network for Seismic Risk Mitigation • UK-NEES (UK Network for Earthquake Engineering Simulation) • NZNEES (New Zealand Network for Earthquake Engineering Simulation) • ISEE (Internet-based Simulation for Earthquake Engineering,Taiwan) • NetSLab (Networked Structural Laboratories, China)

  6. Hunan University Tsinghua University Harbin Institute of Technology NetSLab (Networked Structural Laboratories) Other Institutes Supported by the key project of National Natural Science Foundation of China (2004-2007, 2008-2011)

  7. Internet Network Based Communication Platform NetSLab Applications for Structural Testing Networked Structural Laboratories Pseudo-dynamic Test Testing Capability Improve Request Feedback Lab #1 Lab #3 Lab #2

  8. 2. Development of Networked Structural Laboratories (NetSLab ) 2.1 Network Based Communication Platform 2.1.1 Basic Features • Client/Server concept • Socket based communication mechanism • Generalized data model • Testing results • Three types of participants • Communication protocols

  9. Testing Results Request Observer #1 Tester #1 Controller Feedback Observer #2 Tester #2 Testing Results Observer #3 Tester #3 Three types of participants: Controller, Tester, Observer Roles of participants and interaction in data model (for remote hybrid test)

  10. Communication Protocol Controller Tester #1 Tester #2 Tester #3 Centralized sequential communication protocol Controller for remote hybrid test Tester #1 Tester #2 Tester #3 Centralized parallel communication protocol Controller Tester #1 Tester #2 Tester #3 Distributed parallel communication protocol

  11. 2.1.2 Implementation of Communication Platform Dynamic Unified Data Packet (DUDP) <DUDP> <Communication> …(1)Control information </Communication> <CurTestResult> …(2)Testing data </CurTestResult> </DUDP> XML Formatted Structure Data Only one kind of data packet is needed for traveling among all participants.

  12. GDCA GDCA GDCA Generalized Data Communication Agency (GDCA) DUDP DUDP Tester #1 Controller Tester #2 GDCA has been implemented based on a general interface engine, UniPipe, which provides many sophisticated lower level communication functions and a very flexible ActiveX control interface. DUDP

  13. Design and Maintenance of GDCA The implementation of GDCA is fully open to system designers. UniPipe’s diagram based script language and action tree

  14. Middlebox Private network Public IP Internet Public IP Middlebox Private network Direct end-to-end connection 2.1.3 Across Middlebox Communication Hierarchical Network Environment Middlebox: any intermediary device performing functions other than the normal, standard functions of an IP router on the datagram path between a source host and a destination host.

  15. China Education and Research Network CERNET

  16. Campus Network of Hunan University NAT Router(Firewalls) CHINANET CERNET

  17. Public IP Controller PC Port 80 Private network Tester PC #2 Virtual Tester Simulation of substructure Across Middlebox Communication Integration of global structure Internet Middlebox Firewall/NAT Middlebox Firewall/NAT Private network Loading facilities Tester PC #1 Physical Tester Test of substructure Schematic communication strategy (framework A)

  18. Private network Controller PC Middlebox Firewall/NAT Public IP Communication coordinator PC Port 80 Internet Middlebox Firewall/NAT Middlebox Firewall/NAT Private network Private network Tester PC #2 Loading facilities Tester PC #1 Virtual Tester Physical Tester Schematic communication strategy (framework B)

  19. 2.2 Application Development Very Initial application for testing the reliability of communication platform First application for hybrid simulation of SDOF structural system (connecting to MTS servo hydraulic system)

  20. Communition speed between different sites

  21. NetSLab-Bridge (SDOF) ControlCtr Virtual tester

  22. NetSLab-Bridge (MODF) • Only the longitudinal response of the bridge structure is considered. • Axial deformations of the bridge piers are assumed negligible. • Nonlinear shearing connections are assumed between the column-deck interfaces. The bridge decks are simplified as infinite rigid bars.

  23. NetSLab-Pile A program was developed at USC for hybrid test of 2-DOF structural system. The tester module can connect to Compumotor 6270 motion control box for the Parker actuators.

  24. NetSLab-Building (MDOF) A program was developed for remote hybrid testing of MDOF systems. The tester module can connect to MTS servo hydraulic system and Popwil actuators.

  25. 3. Hybrid Tests of Structures with NetSLab MTS Popwil Structural Lab of Hunan Univ.

  26. Concrete pile test at USC

  27. Hybrid tests of an idealized bridge among four cities Hunan University USC Harbin Institute of Technology (HIT) Tsinghua University Hunan University (HNU)

  28. Hybrid tests of bridge structure Russion River Bridge in California RC column (HNU) CFRP column (HIT)

  29. Hybrid tests of bridge structure Fairfax-Washington Under-crossing of I-10 Freeway (Santa Monica) CFRP column (HIT) GFRP column (HNU)

  30. Hybird tests of a frame with steel beam bolted to CFT column Structural system Test set up

  31. Test specimen

  32. Hybird tests of a frame with buckling-restrained braces

  33. 4. Conclusions • Networked structural laboratory (NetSLab) for seismic simulation of bridge and building structures has been developed. • Hybrid tests of structures have been carried out within different network environments. • Further development for hybrid tests of complex structure is to be considered. • How to choose the tested part and simulated part of a structure when the nonlinearity is distributed all over the whole structure ? • On-line updating of numerical model based on measured experimental behavior may be a choice.

  34. Thank you

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