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Table 5. Eight-story test example: median value of the life-cycle cost (10
3
MU) for the four cases and
the three designs for the probabilistic formulation
Number of records
Design
10
20
40
60
D
descr
3.16E+03
3.04E+03
3.08E+03
3.14E+03
D
PBD1
3.25E+03
2.97E+03
2.95E+03
2.98E+03
D
PBD2
2.05E+03
2.00E+03
1.99E+03
2.00E+03
Table 6. Five-story test example: median value of the life-cycle cost (10
3
MU) for the four cases and the
three designs for the deterministic formulation
Number of records
Design
10
20
40
60
D
descr
5.10E+03
3.54E+03
3.28E+03
4.18E+03
D
PBD1
4.70E+03
3.17E+03
2.84E+03
3.04E+03
D
PBD2
4.37E+03
2.58E+03
2.27E+03
2.75E+03
Table 7. Five-story test example: median value of the life-cycle cost (10
3
MU) for the four cases and the
three designs for the probabilistic formulation
Number of records
Design
10
20
40
60
D
descr
4.79E+03
4.71E+03
4.47E+03
4.72E+03
D
PBD1
3.90E+03
3.26E+03
3.17E+03
3.36E+03
D
PBD2
3.66E+03
3.00E+03
2.90E+03
3.08E+03
METAHEURISTIC OPTIMIZATION
FOR THE INSPECTION SCHEDULING
OF BUILDINGS
and subsequently repair infrastructure elements
will delay search and rescue operations and relief
efforts. The objective of this work is scheduling
structure and infrastructure inspection crews
following an earthquake in densely populated
metropolitan areas. A model is proposed and a
decision support system is designed to aid lo-
cal authorities in optimally assigning inspectors
to critical infrastructures. A combined Particle
Swarm - Ant Colony Optimization based frame-
work is developed which proves an instance of
a successful application of the philosophy of
bounded rationality and decentralized decision-
Natural hazards such as earthquakes, floods and
tornadoes can cause extensive failure of critical
infrastructures including bridges, water and sewer
systems, gas and electricity supply systems, and
hospital and communication systems. Follow-
ing a natural hazard, the condition of structures
and critical infrastructures must be assessed and
damages have to be identified; inspections are
therefore necessary since failure to rapidly inspect
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