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Sensitivity analysis on seismic life-cycle cost of a fixed-steel offshore platform structure

机译：固定钢海上平台结构地震生命周期成本敏感性分析

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In this study sensitivity analyses were conducted to investigate the relative importance of different uncertain variables on the life-cycle cost (LCC) estimation of a steel jacket offshore platform subjected to seismic loads. The sensitivity analysis was conducted using different methods such as tornado diagram analysis (TDA), first-order second-moment (FOSM) and Latin hypercube sampling (LHS). The analysis results showed that the uncertain variables related to loss estimation and seismic hazard had a more dominant influence on the LCC variability compared to the other variables. Among the structural uncertain parameters, the variability in plastic hinge strength and modal damping ratio had the most significant impact on the LCC. Variability in the initial cost showed higher impact on LCC estimations compared to other cost component variables. It was also observed that the application of members with energy dissipation capability resulted in more economical design compared to use of conventional members. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在这项研究中，进行了敏感性分析，以研究不同不确定变量对承受地震载荷的钢套海上平台的生命周期成本（LCC）估计的相对重要性。敏感性分析使用不同的方法进行，例如龙卷风图分析（TDA），一阶二阶矩（FOSM）和拉丁超立方体采样（LHS）。分析结果表明，与其他变量相比，与损失估计和地震灾害有关的不确定变量对LCC变异性的影响更大。在结构不确定参数中，塑性铰强度和模态阻尼比的变化对LCC影响最大。与其他成本要素变量相比，初始成本的可变性对LCC估算显示出更大的影响。还观察到，与常规构件相比，具有消能能力的构件的应用导致更经济的设计。 （C）2016 Elsevier Ltd.保留所有权利。

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