LIFETIME ENGINEERING
of Buildings and Civil Infrastructures
Objectives of NATIONAL DISSEMINATION GROUPS in Thematic Network Lifetime:
National information, demonstration, education and training of lifetime engineering
Projects of lifetime engineering in AUSTRIA :
R & D Projects of the Institute
for Structural Engineering
Institute for Structural Engineering, Vienna University of Technology, www.betonbau.tuwien.ac.at
DI Markus Vill [mvill@pop.tuwien.ac.at]
Lifetime investment planning and decision making
LIFE-CYCLE OF A BRIDGE STRUCTURE
• Modules for implementation of the Austrian Bridge Management System
• Analysis of the reliability of reinforced concrete bridges
(probabilistic assessment)
Replacement
Ongoing maintenance
Demolition
General maintenance
Integrated lifetime design
Maintenance
Construction
process
Reason for
Costs
Life-Cycle-Cost for
service life
Amount of costs
• COST 345 Assessment of Highway Structures
• SAMARIS Project – Sustainable and Advanced MAterials for
Road InfraStructure
New structure
End duration of
liability
t1
t2
Time
treplacement
?
Structural member
1
Superstructure
approx. 80 years
depending on
Materials
2
Substructure
Longest service life of all
structural members
-
Bearing
approx. 36 years
-
4
Expansion joint
approx. 25 years after 10^8
crossings of heavy lorrys
AADT 5000 with 4,3
axes (mean)
5
Edge Beam
approx. 30 years
-
6
Pavement
Asphalt surface: 15 years
Concrete surface: 30 – 40
years
depending on
AADT
7
Drainage System and
Waterproofing
approx. 15-20 Jahre
replacement during
same time with
pavement
8
Equipment
15-20 years
-
Integrated Lifetime Management and maintenance Planning 3
• SARA: Structural Analysis and Reliability Assessment of bridges
• Condition Assessment of post-tensioned bridges
• Algorithm for the Condition Assessment of concrete bridges based on
inspection data
• Probabilistic Assessment of concrete bridges within the road stock
Service Life (mean]
Nr.
Remarks
[Cost model Wicke]
LIFE CYCLE ANALYSIS OF ROAD CONSTRUCTIONS
LCC ANALYSIS IMPLEMENTED FOR MOTORWAY NET WORK IN AUSTRIA
COST-BENEFIT-ANALYSIS
BENEFIT = IMPACT OF A TREATMENT STRATEGY
ON PAVEMENT CONDITION (MSI) WEIGHTED
ACCORDING TO TRAFFIC LOAD
PAVEMENT
CONDITION
BENEFIT
BENEFIT = „AUC“ • AADT
+ Pavement Condition -
Institute for Road Construction and Maintenance, Vienna University of Technology, www.istu.tuwien.ac.at
DI Petra Simanek [psimanekl@istu..tuwien.ac.at]
Do-Nothing-Strategy
Strategy 1
Strategy 2
Reconstruction
Overlay
Overlay
S3
„DO-NOTHING-FUNCTION“
Age [Year]
IBC
S2
LCC ANALYSIS
S1
TREATMENT
S4
„AUC”
TIME
BC
HEURISTIC OPTIMIZATION
S5
„ MINIMUM TREATMENT COST OPTIMIZATION
RESTRICTIONS BY PAVEMENT CONDITION
COSTS
„AUC” = Area under the curve
CALCULATION OF BENEFIT FOR EACH
INDIVIDUAL TREATMENT STRATEGY
COMPARISON OF TREATMENT
STRATEGIES AND SELECTION OF MOST
EFFICIENT STRATEGIES FOR
OPTIMIZATION
„ MAXIMUM BENEFIT OPTIMIZATION
„ RESTRICTIONS BY AVAILABLE BUDGET
„ ECONOMIC ASSESSMENT USING IBC
„ MAXIMUM IN SAVING USER COSTS
„ MINIMUM TOTAL TRANSPORTATION COST
OPTIMIZATION
Principal contractors of Thematic Network LIFETIME:
Thematic Network LIFETIME in figures:
• VTT Technical Research Centre of Finland, FI
Coordinator Prof. Dr. Asko Sarja, asko.sarja@vtt.fi
• Taylor Woodrow Construction Ltd, UK
• CSTB Centre Scientifique et Technique du Bâtiment, FR
• Imperial College of Science Technology and Medicine, UK
• Universität Karlsruhe, DE
• Working period: 1/6/2002 - 31/5/2005
• Participation: 96 partners from 28 countries
• Plenary workshops: 2002 Norway, 2003 Finland and 2005 France
• 25 National Dissemination Groups
• Funding from 5th Framework Programme:
Competitive And Sustainable Growth (GROWTH) Programme