Life-Cycle Cost and Performance of Civil Infrastructure Systems

2007 ◽  
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Civil Infrastructure ◽  
Infrastructure Systems ◽  
And Performance

Metaheuristic Optimization in Seismic Structural Design and Inspection Scheduling of Buildings

2012 ◽  
pp. 152-173
Author(s):  
Chara Ch. Mitropoulou ◽  
Vagelis Plevris ◽  
Nikos D. Lagaros
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Assessment Tool ◽  
Optimization Problems ◽  
Construction Cost ◽  
Life Cycle Cost Analysis ◽  
Decentralized Decision Making ◽  
And Performance ◽  
Inspection Scheduling ◽  
Single Objective

Optimization is a field where extensive research has been conducted over the last decades. Many types of problems have been addressed, and many types of algorithms have been developed, while their range of applications is continuously growing. The chapter is divided into two parts; in the first part, the life-cycle cost analysis is used as an assessment tool for designs obtained by means of prescriptive and performance-based optimum design methodologies. The prescriptive designs are obtained through a single-objective formulation, where the initial construction cost is the objective to be minimized, while the performance-based designs are obtained through a two-objective formulation where the life-cycle cost is considered as an additional objective also to be minimized. In the second part of the chapter, the problem of inspection of structures and routing of the inspection crews following an earthquake in densely populated metropolitan areas is studied. A model is proposed and a decision support system is developed to aid local authorities in optimally assigning inspectors to critical infrastructures. A combined particle swarm – ant colony optimization based framework is implemented, which proves to be an instance of a successful application of the philosophy of bounded rationality and decentralized decision-making for solving global optimization problems.

Construction of an evaluation system for selecting an appropriate waterproofing method for the roof of a building

2012 ◽  
Vol 39 (12) ◽  
pp. 1264-1273 ◽  
Author(s):  
Sung-Min Choi ◽  
Sang-Keun Oh ◽  
Chee-Ho Seo
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Evaluation System ◽  
Evaluation Model ◽  
Evaluation Criteria ◽  
Value Engineering ◽  
Cost Evaluation ◽  
Final Decision ◽  
Decision Making Processes ◽  
And Performance

In this study, the discussion focus on the analysis of evaluation systems for selecting an appropriate waterproofing method, which involves a series of decision-making processes for providing unbiased, methodical, and suitable grounds to facilitate the final decision of the house owner. Thus, the research can potentially develop a decomposable model for validation and a deployable application model for the construction and performance-based design of materials. This paper has determined the performance evaluation criteria of 28 items and the evaluation index that is derived from the application of the value engineering procedure through the analysis for selecting the appropriate waterproofing method, and made a cost evaluation model of the risk based weighted life cycle cost so that life cycle cost evaluation can be performed in consideration of the risk.

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