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首页> 外文期刊>Environmental Impact Assesment Review >Reliability-based maintenance optimization of corrosion preventive designs under a life cycle perspective
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Reliability-based maintenance optimization of corrosion preventive designs under a life cycle perspective

机译：基于生命周期的防腐设计基于可靠性的维护优化

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摘要

Sustainability is of paramount importance when facing the design of long lasting, maintenance demanding structures. In particular, a sustainable life cycle design for concrete structure exposed to aggressive environments may lead to significant economic savings, and to reduced environmental consequences. The present study evaluates 18 different design alternatives for an existing concrete bridge deck exposed to chlorides, analyzing the economic and environmental impacts associated with each design as a function of the maintenance interval chosen. Results are illustrated in the context of a reliability-based maintenance optimization on both life cycle costs and life cycle environmental impacts. Maintenance optimization results in significant reductions of life cycle impacts if compared to the damage resulting from performing the maintenance actions when the end of the service life of the structure is reached. The use of concrete with 10% silica fume has been shown to be the most effective prevention strategy against corrosion of reinforcement steel in economic terms, reducing the life cycle costs of the original deck design by 76%. From an environmental perspective, maintenance based on the hydrophobic treatment of the concrete deck surface results in the best performance, allowing for a reduction of the impacts associated with the original design by 82.8%.
机译：当面对设计持久，需要维护的结构时，可持续性至关重要。尤其是，暴露于侵蚀性环境的混凝土结构的可持续生命周期设计可以节省大量经济费用，并减少对环境的影响。本研究评估了暴露于氯化物的现有混凝土桥梁桥面的18种不同设计方案，并根据所选维护间隔来分析与每种设计相关的经济和环境影响。在基于可靠性的维护优化中对生命周期成本和生命周期环境影响进行了说明。与达到结构使用寿命结束时执行维护操作所造成的损坏相比，维护优化可以显着减少生命周期影响。从经济角度来看，使用含10％硅粉的混凝土是防止钢筋腐蚀的最有效的预防策略，可将原始甲板设计的生命周期成本降低76％。从环境角度来看，基于混凝土甲板表面的疏水处理进行的维护可获得最佳性能，从而使与原始设计相关的影响降低了82.8％。

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