Các vấn đề phát triển LRFD
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TT--11 200511 2005 11
Grand Challenges:
Grand Challenges:
A Strategic Plan
A Strategic Plan
for Bridge Engineering
for Bridge Engineering
NCHRP Project 20
NCHRP Project 20
-
-
07/Task 199
07/Task 199
Final Report
Final Report
Dennis R. Mertz
Dennis R. Mertz
University of DelawareUniversity of Delaware
Report from a Workshop in
Report from a Workshop in
Woods Hole, Massachusetts
Woods Hole, Massachusetts
April 18
April 18
-
-
20, 2005
20, 2005
TT--11 200511 2005 22
2000 WORKSHOP
2000 WORKSHOP
A workshop was conducted February 14
A workshop was conducted February 14
-
-
16, 2000 in
16, 2000 in
Irvine, California to develop a strategic plan for
Irvine, California to develop a strategic plan for
bridge engineering.
bridge engineering.
The product of the original workshop is six
The product of the original workshop is six
“
“
thrust
thrust
”
”
discussions. Each thrust focuses on a specific
discussions. Each thrust focuses on a specific
business need of the AASHTO bridge engineers.
business need of the AASHTO bridge engineers.
TT--11 200511 2005 33
The unprioritized thrusts are as follows:
The unprioritized thrusts are as follows:
Enhanced Materials, Structural
Enhanced Materials, Structural
Systems, and Technologies;
Systems, and Technologies;
Efficient Maintenance, Rehabilitation,
Efficient Maintenance, Rehabilitation,
and Construction;
and Construction;
Bridge Management;
Bridge Management;
Enhanced Specifications for Improved
Enhanced Specifications for Improved
Structural Performance;
Structural Performance;
Computer
Computer
-
-
Aided Design, Construction,
Aided Design, Construction,
and Maintenance; and
and Maintenance; and
Leadership.
Leadership.
TT--11 200511 2005 44
A second workshop was conducted April
A second workshop was conducted April
18
18
-
-
20, 2005, in Woods Hole,
20, 2005, in Woods Hole,
Massachusetts, to refine the 2000
Massachusetts, to refine the 2000
strategic plan.
strategic plan.
2005 WORKSHOP
2005 WORKSHOP
TT--11 200511 2005 55
The products of this workshop are a focused
The products of this workshop are a focused
set of critical problems extracted from the
set of critical problems extracted from the
2000 strategic plan that, if solved, would
2000 strategic plan that, if solved, would
lead to significant advances in bridge
lead to significant advances in bridge
engineering. Borrowing from intellectual
engineering. Borrowing from intellectual
competitions set in motion by German
competitions set in motion by German
mathematician David Hilbert in 1900, these
mathematician David Hilbert in 1900, these
critical problems are termed
critical problems are termed
“
“
Grand Challenges.
Grand Challenges.
”
”
TT--11 200511 2005 66
The prioritized grand challenges are:
The prioritized grand challenges are:
Extending Service Life,
Extending Service Life,
Optimizing Structural Systems,
Optimizing Structural Systems,
Accelerating Bridge Construction,
Accelerating Bridge Construction,
Advancing the AASHTO Specifications,
Advancing the AASHTO Specifications,
Monitoring Bridge Condition,
Monitoring Bridge Condition,
Contributing to National Policy, and
Contributing to National Policy, and
Managing Knowledge
Managing Knowledge
TT--11 200511 2005 77
Each
Each
“
“
grand challenge
grand challenge
”
”
is defined through a
is defined through a
brief statement of the challenge and anticipated
brief statement of the challenge and anticipated
outcome, and discussions of the practical
outcome, and discussions of the practical
importance, the technical importance, and the
importance, the technical importance, and the
readiness of the challenge to be solved. Finally,
readiness of the challenge to be solved. Finally,
lists of important activities/research areas and
lists of important activities/research areas and
minimum measures of success, called
minimum measures of success, called
benchmarks, are included. The benchmarks are
benchmarks, are included. The benchmarks are
grouped as: short term (in 2
grouped as: short term (in 2
-
-
3 years), mid
3 years), mid
-
-
term
term
(in 4
(in 4
-
-
5 years) and long term (beyond 5 years.)
5 years) and long term (beyond 5 years.)
TT--11 200511 2005 88
GRAND CHALLENGE 1:
GRAND CHALLENGE 1:
EXTENDING SERVICE LIFE
EXTENDING SERVICE LIFE
To understand the processes that decrease the
To understand the processes that decrease the
serviceability of existing bridges and highway
serviceability of existing bridges and highway
structures, and to develop approaches to preserve
structures, and to develop approaches to preserve
(maintain and rehabilitate) the existing system by
(maintain and rehabilitate) the existing system by
managing these processes.
managing these processes.
Anticipated Outcome:
Anticipated Outcome:
Strategies to extend the service life of existing
Strategies to extend the service life of existing
inventory of bridges and highway structures.
inventory of bridges and highway structures.
