Jacket platforms are widely used for hydrocarbon production in the oil and gas offshore field so far. After years of operation in jacket platforms, a structural integrity check is required to investigate whether the structure of the jackets is fit for purpose or not. So, maintenance, repair, and strengthening become an ongoing and continual process during the jacket platform's life. Corrosion, fatigue, vessel collisions, heavy dropped objects, and severe storms are the main reasons for damages. These events lead to perforation, dent, failure, and strength reduction of jacket elements. In this paper, a set of finite element models is used to model each damage case. Moreover, Strengthening, Modification, and Repair (SMR) techniques observe the members' behavior and the efficiency of the repair action. Also, multi-criteria analysis is presented for prioritizing the SMR techniques using the technique for preference by similarity to ideal solution (TOPSIS) method. The results and insights, the ultimate strength for both damage and repaired cases, provide a supportive view to the engineers to design a proper repair method. What is more, the results provide an ideal solution in selecting alternatives for repair methods.

迄今为止，夹套平台已广泛用于石油和天然气海上领域的碳氢化合物生产。在夹克平台上运行多年后，需要进行结构完整性检查，以调查夹克的结构是否适合用途。因此，维护，修理和加固成为夹克平台生命周期中一个持续不断的过程。腐蚀，疲劳，船只碰撞，重物掉落和严重的暴风雨是造成损坏的主要原因。这些事件导致护套元件穿孔，凹陷，破坏和强度降低。在本文中，使用一组有限元模型对每个损坏情况进行建模。此外，强化，修改和修复（SMR）技术可观察成员的行为和修复动作的效率。还，提出了多标准分析，以通过优先选择与理想解决方案（TOPSIS）方法相似的方法对SMR技术进行优先级排序。结果和见解，即损坏和维修案例的终极实力，为工程师设计正确的维修方法提供了支持。此外，结果为选择维修方法的替代方案提供了理想的解决方案。