Long-Life Coatings for Offshore Structures

2021 ◽  
Author(s):  
Winn Darden
Keyword(s):  
Life Cycle ◽  
Corrosion Protection ◽  
Steel Structures ◽  
Offshore Structures ◽  
Color Retention ◽  
Long Life ◽  
Conventional Coating

Coatings are used on offshore steel structures to prevent corrosion and to preserve their appearance. Conventional coating systems require repainting after only 10-15 years. Fluoropolymer coatings have been used on offshore structures since the mid-1980’s. These coatings offer excellent corrosion protection as well as good gloss and color retention for more than 30 years in some cases. Using fluorinated coating systems can substantially lower life cycle coating costs and require fewer maintenance cycles than conventional coatings.

Optimality and Acceptance Criteria in Offshore Design

2004 ◽  
Vol 126 (3) ◽  
pp. 258-264 ◽  
Author(s):  
Oliver Ku¨bler ◽  
Michael Havbro Faber
Keyword(s):  
Life Cycle ◽  
Optimal Design ◽  
Net Present Value ◽  
Steel Structures ◽  
Offshore Structures ◽  
Theoretical Problem ◽  
Offshore Structure ◽  
Suggested Approach ◽  
Structural Capacity ◽  
Wide Range

The optimal design of offshore structures is formulated as a decision theoretical problem. The objective is to maximize the expected net present value of the life cycle benefit. The general optimization problem is simplified by taking into account the cost impacts of a possible reconstruction of the structure. The analytical solution to this problem has been derived for the case, where failure events follow a stationary Poisson process. The life cycle benefit is formulated in terms of the production profile, the design and construction costs, failure costs and reconstruction costs. In order to assess the effect of potential loss of lives, the costs of fatalities are included applying the concept of the Implied Costs of Averting a Fatality ICAF. The suggested approach to optimal design, which can be applied for any type of offshore structure, is exemplified considering the special case of steel structures. Here, it is standard to represent the ultimate structural capacity in terms of the Reserve Strength Ratio RSR. For the purpose of illustration, the relation between material usage and RSR, which is valid for monopod structures, is applied. Optimal RSR’s and corresponding annual failure rates are assessed for both manned and unmanned structures covering a wide range of different realistic ratios between the potential revenues and costs for construction, failure and reconstruction.

scholarly journals Risk-Informed Performance-Based Metrics for Evaluating the Structural Safety and Serviceability of Constructed Assets against Natural Disasters

2021 ◽  
Vol 13 (11) ◽  
pp. 5925
Author(s):  
Nuno Marques de Almeida ◽  
Maria João Falcão Silva ◽  
Filipa Salvado ◽  
Hugo Rodrigues ◽  
Damjan Maletič
Keyword(s):  
Life Cycle ◽  
Built Environment ◽  
Natural Disasters ◽  
Evaluation Criteria ◽  
Design Methods ◽  
Structural Safety ◽  
Building Structures ◽  
Natural Agents ◽  
Long Life ◽  
Physical Asset

The tangible and intangible value derived from the built environment is of great importance. This raises concerns related to the resilience of constructed assets to both human-made and natural disasters. Consideration of these concerns is present in the countless decisions made by various stakeholders during the decades-long life cycle of this type of physical asset. This paper addresses these issues from the standpoint of the engineering aspects that must be managed to enhance the structural safety and serviceability of buildings against natural disasters. It presents risk-informed performance-based parameterization strategies and evaluation criteria as well as design methods to embed differentiated levels of structural safety and serviceability of buildings against wind, snow, earthquakes and other natural agents. The proposed approach enables designers to assure the resilience and reliability of building structures against natural risks.

scholarly journals Life Cycle System Aiming at a Long Life Product : Environmental Assessment of Reuse Parts

2004 ◽  
Vol 2004.14 (0) ◽  
pp. 455-458
Author(s):  
Katsuya NAGATA ◽  
Makoto NOTOMI ◽  
Hiroshi ONODA ◽  
Shinsaku KOSUGE ◽  
Koji SATO ◽  
...  
Keyword(s):  
Life Cycle ◽  
Environmental Assessment ◽  
Cycle System ◽  
Long Life ◽  
Life Cycle System
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