Abstract Nonlinear behavior of jacket platforms is important in both design and rehabilitation issues that depends on the bracing arrangement. Both ductility and strength of the structures derived from pushover analysis are highly related to configuration of the braces. Considering a suitable criterion such as constant weight or constant stiffness and period of the structure in all arrangement cases, one can compare the capacity curves and find the best configuration. In this paper a simple logical method for investigating the strength and ductility of the jacket structure is presented, it is shown that global geometry and configuration of the braces are very important and effective in both strength and ductility parameters. Three parameters, normalized strength, normalized ductility and a combination of these two parameters are defined in order to have an engineering and practical index for comparing the results. At the end of the numerical discussion, the optimum configuration can be found. Such an investigation is very important in the initial design stage. Also, in assessment of existing platforms, it is very important to find the reliable strength and ductility of the structure. Such a study gives a deep view of this issue as well.

中文翻译：

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基于强度和延性的导管架平台支架优化布置

摘要 导管架平台的非线性行为在取决于支撑布置的设计和修复问题中都很重要。Pushover 分析得出的结构的延展性和强度都与支撑的配置高度相关。考虑到一个合适的标准，例如在所有布置情况下结构的恒定重量或恒定刚度和周期，可以比较容量曲线并找到最佳配置。本文提出了一种研究导管架结构强度和延性的简单逻辑方法，表明支撑的整体几何形状和配置在强度和延性参数方面非常重要和有效。三个参数，归一化强度，定义归一化延展性和这两个参数的组合，以便有一个工程和实用指标来比较结果。在数值讨论结束时，可以找到最佳配置。这种调查在初始设计阶段非常重要。此外，在评估现有平台时，找到结构的可靠强度和延展性非常重要。这样的研究也对这个问题给出了深刻的见解。