research on networked structural laboratories in china jiping ru 1) ; yan xiao 2) ; xilin lu 3) ;...
TRANSCRIPT
Research on Networked Research on Networked Structural Laboratories in ChinaStructural Laboratories in China
Jiping RUJiping RU 1) 1); Yan XIAO ; Yan XIAO 2) 2) ; Xilin LU ; Xilin LU 3)3); ;
1) National Natural Science Foundation of China
2) Hunan University, China; University of Southern California, USA
3) Tongji University, China
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
NSFC-National Natural Science Foundation of China
Following the role model of US NSF, the NSFC was established as an agency directly under the premier’s office.
NSFC is responsible to fund basic research in natural sciences, engineering and management sciences.
NSFC-Division of Civil and Environmental Engineering
Department of Engineering and Material Sciences: 9 divisionsMetallic MaterialsNonmetallic and Inorganic MaterialsOrganic Polymer MaterialsMetallurgy and Mining Engineering Mechanical EngineeringEngineering Thermophysics and Utilization of EnergyElectrical EngineeringCivil and Environmental EngineeringHydraulic Engineering
NSFC-Division of Civil and Environmental Engineering
Funding levels:Major focused project: about 10m rmb/proj.
Key focused project: about 2m rmb/proj.
General project (unsolicited): average 280k rmb/proj.
Successful rate about 16% (2005), following essential similar review procedures as US NSF.
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
Motivations of current research: opportunities and problems
Increased investment to higher education by Chinese government has resulted in significant upgrade of structural laboratories.However, there is a trend of low-level duplications and simple import of foreign equipment. There is a significant lack of domestic and inter-campus collaborations.
There is a need to establish and enhance the collaboration mechanisms among researchers and universities, domestically and internationally.
Reduce low-level duplication of laboratories and encourage shared use of research resources.
Other development in IT industry, Japan-Korea remote collaboration research and the US NEES program offered good examples.
Motivations of current research: opportunities and problems
BackgroundUSC and Hunan Univ. took initiatives of remote online testing collaborations from 2001.
Paper by Ru and Xiao (2002) introduced the US NEES efforts and discussed the need of similar studies in China.
NSFC workshop in Nov. 2002 identified the need of launching a national key project.
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
Two Key Focused Projects
Proposed in 2003 and funded in 2004:Research on the basic theory for earthquake simulated shake table test
(PI.: Lu, Xilin, Tongji Univ.)
The networked structural laboratories and hybrid experiment research project
(PI.: Xiao, Yan, Hunan Univ./USC)
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
Progress of shake table research
Internet based real-time video broadcast system
3. Standardization and shared use of shake table test results
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
NetSLabNetworked Structural Laboratories
Or
Networked Scientific Laboratories
http://www.netslab.com
NetSLab Data Model:
Contents
testing results;
three types of participants;
communication protocols and dataflow.
Three type of participants
Testing Results TR(i, j)
Controller
Tester
Tester
Tester Tester
Tester…
Observer
Observer
Observer Observer
Observer…
Communication Protocols and Dataflow
Centralized sequential communication: controller sends control data (called request) to each tester one by one and a tester responds back to controller only after it finishes controller’s request. Centralized parallel communication: controller sends requests to multiple testers simultaneously and waits for their response. As soon as obtaining the responses from the testers, the controller decides and starts next step to send out next round of requests.Distributed parallel communication: controller only sends out the start signals and initial data to certain testers. When a tester receives the partial TR and request, it executes certain action and decides its own action to send request and testing result to someone else. At certain point, a tester may report the results back to the controller.
II. Implementation of NetSLab
Dynamic Unified Data Packet (DUDP)
Generalized Data Communication Agency (GDCA)
Control module Observation Operation Visualization Search
UniPipe IE /XML data model
Database口
Equi. Com口
Dat口
Core
User module
IE – Interface Engine
Limitations in Internet Environment
Public network
PC-B
PC-C
PC-D
Firewall
Firewall
Intranet
LAN
PC-A
NetSLab’s capability of penetrating firewalls
Simulation of global structure
Control Center PC
Public IP
Internet
LAN
Firewall
Test of substructure Physical Tester
LAN
Simulation of substructure Virtual Tester
Loading facilities
Private IP Private IP
Tester PC #1 Tester PC #2
Firewall
Port 80
Option-2, VPN Server PC
Router
Simulation of global structure Control Center
Public IP
Internet
LAN
Firewall
Test of substructure Physical Tester
LAN
Simulation of substructure Virtual Tester
Loading facilities
Private IP Private IP
Tester PC #1 Tester PC #2
Firewall
VPN VPN
Option-3, SOAP
Internet
LAN
Firewall
Test of substructure Physical Tester
LAN
Simulation of substructure Virtual Tester
Loading facilities
Private IP Private IP
Tester PC #1 Tester PC #2
Firewall
LAN
Simulation of global structure Control Center PC
Private IP
Firewall
Public IP
Server PC (Web Bridge) SOAP
SOAP SOAP
NetSLab Applications to date
•Remote analyses
•Remote pseudo dynamic testing
•CFT column (Hunan University)
•PC pile foundation and pier column (USC)
•Harbin Univ. of Tech. and Others
Remote parallel analysis and experimentation
Dis. increment
Feedbacks
Hysteretic models
X
R
gX
Solving E. of motion
gXMKXXCXM
PC-A PC-B
NetSLab Observers
Testing model
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
Ongoing and Future applications
Collaboration in a multi-campus international program for remote testing of bridges with hollow steel CFT piers, led by Prof. Tsai at NCREE.
USC-Hunan University collaborations in bridge pier – footing – pile foundation response testing.
Multi-campus remote testing on model bridge.
International collaborations, etc.
ContentsBrief introduction of NSFC
Motivations and background
Two key projects on experimental methods
Progress of Key project – I: shake table
Progress of Key project – II: NetSLab
Future directions
Concluding remarks
Concluding remarks
The two national key focused projects funded by NSFC have helped to redirect the academic attentions to advanced experimental methods.
NSFC encourages various forms of international collaborations. Possible mechanisms include:
focused or general projects;
supplemental fund for existing projects;
and international workshops, etc.