Transcript Research on Networked Structural Laboratories in China Jiping RU 1); Yan XIAO 2) ; Xilin LU 3); 1) National Natural Science Foundation of.

Research on Networked
Structural Laboratories in China
Jiping RU 1); Yan XIAO 2) ; Xilin LU 3);
1) National Natural Science Foundation of China
2) Hunan University, China; University of Southern
California, USA
3) Tongji University, China
Contents
Brief 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
Contents
Brief 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 divisions
Metallic Materials
Nonmetallic and Inorganic Materials
Organic Polymer Materials
Metallurgy and Mining Engineering
Mechanical Engineering
Engineering Thermophysics and Utilization of Energy
Electrical Engineering
Civil and Environmental Engineering
Hydraulic 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.
Contents
Brief 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.
Motivations of current research: opportunities and
problems
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, JapanKorea remote collaboration research and the
US NEES program offered good examples.
Background
USC 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.
Contents
Brief 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)
Contents
Brief 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
Basic theory – concrete simulation rules
using fine sand mortar
Progress of shake table
research
Internet based real-time video broadcast
system
3. Standardization and shared use of shake
table test results
Progress of shake table
research
Hybrid seismic test method and technology
Contents
Brief 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
http://www.netslab.com
NetSLab
Networked Structural Laboratories
Or
Networked Scientific Laboratories
Features of NetSLab
I. Data Model
II. Implementation of NetSLab
NetSLab Data Model:
Contents
testing results;
three types of participants;
communication protocols and dataflow.
Three type of participants
Controller
Observer
Tester
Tester
Tester
Tester
Tester…
Testing Results
TR(i, j)
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)
IE – Interface Engine
Control module
Observation
Operation
Visualization
User module
UniPipe IE /
XML data model
Core
Data
base
口
Equi.
Com
口
Dat
口
Search
Limitations in Internet Environment
NetSLab’s capability of penetrating
firewalls
Public IP
Control Center PC
Simulation of global structure
Port 80
Internet
Firewall
Firewall
LAN
LAN
Private IP
Loading facilities
Physical Tester
Test of substructure
Tester PC #1
Private IP
Tester PC #2
Virtual Tester
Simulation of substructure
Option-2, VPN
Server PC
Public IP
Router
Control Center
Simulation of global structure
Internet
VPN
Firewall
VPN
Firewall
LAN
LAN
Private IP
Loading facilities
Physical Tester
Test of substructure
Tester PC #1
Private IP
Tester PC #2
Virtual Tester
Simulation of substructure
Option-3, SOAP
SOAP
Server PC (Web Bridge)
Private IP
LAN
Public IP
Firewall
Control Center PC
Simulation of global structure
Internet
SOAP
Firewall
SOAP
Firewall
LAN
LAN
Private IP
Tester PC #1
Loading facilities
Physical Tester
Test of substructure
Private IP
Tester PC #2
Virtual Tester
Simulation of substructure
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
PC-A
Dis. increment
PC-B
NetSLab
Observers
Feedbacks
R
X g
Solving E. of motion
MX  CX  KX   MX g
X
Hysteretic models
Testing model
NetSLab- Version 1.02
Testing Concept
Column:
numerical
model
Pile:
experiment
Contents
Brief 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.
Contents
Brief 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.
Yuelu Academy